<div><font color="#336666"><font face="verdana,sans-serif">As I am an Equest user for appropriate projects, an Energy Plus user for projects that can not be done well in eQuest, and as a representative of Design builder my advise is to use Design builder, (free for a month) to develop your Green Roof project. You will find that design builder has a Green Roof feature built in and that it is not much harder then eQuest. You can export your project from Design Builder to Energy Plus, in a fashion similar to how you might start with the wizards in eQuest then move on to the detailed mode at the tail end of the project. </font></font></div>
<div><font color="#336666"><font face="verdana,sans-serif"><br></font></font></div><div><font color="#336666"><font face="verdana,sans-serif">Then you can benchmark whatever work around(s) you decide to use in eQuest with the Design Builder/Energy Plus results, or can just use the Design Builder/Energy Plus simulation for your project. </font></font></div>
<div><font color="#336666"><font face="verdana,sans-serif"><br></font></font></div><div><font color="#336666"><font face="verdana,sans-serif">There has been a lot of work put into the Green roof simulation tools of Energy Plus/Design Builder, and I think that using work around in eQuest simply for fear of the unknown land of Energy Plus should not deter you from the prospect, as Design Builder has simplified Energy Plus down to a comparable ease of use to that of eQuest.</font></font></div>
<div><font color="#336666"><font face="verdana,sans-serif"><br></font></font></div><div><font color="#336666" face="verdana, sans-serif">Below is the documentation from Design Builder on modeling a Green Roof for your review..</font></div>
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<font color="#336666"><font face="verdana,sans-serif"><br></font></font></div><div><font color="#336666"><font face="verdana,sans-serif"><br></font></font></div></font></font><h1 style="font-family:Arial,sans-serif;text-transform:capitalize;font-size:large">
<br>Green Roof</h1><p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif"><span style="font-weight:bold;color:rgb(0,0,128)"><span style="color:rgb(0,0,0)">Green</span> <span style="color:rgb(0,0,0)">roof</span> tab <a href="http://www.designbuilder.co.uk/helpv3/Content/Materials.htm" target="_blank">Materials</a> D</span><span style="font-weight:bold;color:rgb(0,0,128)">ialog</span></p>
<p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif"> </p><p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif">
<span style="font-weight:bold">Green</span> <span style="font-weight:bold">roofs</span> can be modelled in DesignBuilder by creating a <span style="font-weight:bold">roof</span> construction using a <span style="font-weight:bold">Green</span> <span style="font-weight:bold">roof</span> material as the outer layer. The <span style="font-weight:bold">green</span> <span style="font-weight:bold">roof</span> can receive water during the simulation from an <a href="http://www.designbuilder.co.uk/helpv3/Content/_Site_details.htm#Roof" target="_blank">irrigation system</a> and/or from <a href="http://www.designbuilder.co.uk/helpv3/Content/_Site_details.htm#Site" target="_blank">site precipitation</a> (defined separately from the hourly weather data). The initial properties of the soil layer are defined on the <span style="font-weight:bold">Green</span> <span style="font-weight:bold">roof</span> tab of the Materials dialog.</p>
<p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif"> </p><p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif">
<span style="font-weight:bold">Green</span> walls can also be modelled though in this case the irrigation must be treated differently to <span style="font-weight:bold">roofs</span> as walls will not naturally trap much precipitation.</p>
<p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif"> </p><p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif">
Note that specifying a <span style="font-weight:bold">green</span> <span style="font-weight:bold">roof</span> material as the material for a <i>component block</i> will not work - these only use materials for their reflective properties.</p>
<p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif"> </p><div style="font-family:'Times New Roman';font-size:medium"><div style="font-weight:bold;font-size:10pt;font-family:Arial">
<a href="http://www.designbuilder.co.uk/helpv3/Content/GreenRoof.htm?SearchType=Stem&Highlight=Green%7Cgreen%7C%7CRoof%7Croofs%7Croof%7CRoofs" style="text-decoration:none" target="_blank"><img src="http://www.designbuilder.co.uk/helpv3/Content/SkinSupport/DropDownOpen.gif" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;border-width:initial;border-color:initial;margin-right:5px">Background</a></div>
<div><p style="margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif;font-size:10pt">Use of <span style="font-weight:bold">green</span> <span style="font-weight:bold">roofs</span> (aka ecoroofs or vegetated <span style="font-weight:bold">roofs</span>) is becoming increasingly common for both new and retrofit buildings. There is widespread recognition and a growing literature of measured data that suggest <span style="font-weight:bold">green</span> <span style="font-weight:bold">roofs</span> can reduce building energy consumption. The EnergyPlus <span style="font-weight:bold">Green</span> <span style="font-weight:bold">Roof</span> capability can assist developers and architects in assessing the likely magnitude of energy savings associated with various implementation options (e.g., soil type/depth, irrigation options, plant type). It provides a quantitative and physically-based building energy simulation tool that represents the effects of <span style="font-weight:bold">green</span> <span style="font-weight:bold">roof</span> constructions and facilitates more rapid spread of <span style="font-weight:bold">green</span> <span style="font-weight:bold">roof</span> technologies and make it possible to account for green <span style="font-weight:bold">roof</span> benefits in state energy codes and related energy efficiency standards such as LEED.</p>
<p style="margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif;font-size:10pt"> </p><p style="margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif;font-size:10pt">
The <span style="font-weight:bold">green</span> <span style="font-weight:bold">roof</span> model accounts for:</p><p style="margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif;font-size:10pt">
</p><ul style="margin-top:0px;margin-bottom:0px"><li value="1" style="font-family:Arial,sans-serif;font-size:10pt">Long wave and short wave radiative exchange within the plant canopy,</li><li value="2" style="font-family:Arial,sans-serif;font-size:10pt">
Plant canopy effects on convective heat transfer,</li><li value="3" style="font-family:Arial,sans-serif;font-size:10pt">Evapotranspiration from the soil and plants, and</li><li value="4" style="font-family:Arial,sans-serif;font-size:10pt">
Heat conduction (and storage) in the soil layer</li></ul><p style="margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif;font-size:10pt"> </p><p style="margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif;font-size:10pt">
The ability to track moisture-dependent thermal properties is not implemented yet due to stability issues in the CTF scheme, but is under development for use with the finite difference solution scheme made available in EnergyPlus starting in version 2. As implemented in EnergyPlus the <span style="font-weight:bold">green</span> <span style="font-weight:bold">roof</span> module allows the user to specify “ecoroof” as the outer layer of a rooftop construction. The user can then specify various aspects of the <span style="font-weight:bold">green</span> <span style="font-weight:bold">roof</span> construction including growing media depth, thermal properties, plant canopy density, plant height, stomatal conductance (ability to transpire moisture), and soil moisture conditions (including irrigation). The model formulation includes the following:</p>
<p style="margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif;font-size:10pt"> </p><ul style="margin-top:0px;margin-bottom:0px"><li value="1" style="font-family:Arial,sans-serif;font-size:10pt">
Simplified moisture balance that allows precipitation, irrigation, and moisture transport between two soil layers (top and root zone).</li><li value="2" style="font-family:Arial,sans-serif;font-size:10pt">Soil and plant canopy energy balance based on the Army Corps of Engineers’ FASST vegetation models (Frankenstein and Koenig), drawing heavily from BATS (Dickenson et al.) and SiB (Sellers et al.).</li>
<li value="3" style="font-family:Arial,sans-serif;font-size:10pt">Soil surface (Tg) and foliage (Tf) temperature equations are solved simultaneously each time step, inverting the CTF to extract heat flux information for the energy balance calculation. The detailed energy balance analysis and resulting equations, being rather complicated, are summarized here. The interested reader is referred to the FASST documentation cited herein for the complete development. The end result is a set of two simultaneous equations for temperature—one for the soil surface and the other for the foliage. <br>
<br></li></ul></div></div><div style="font-family:'Times New Roman';font-size:medium"><div style="font-weight:bold;font-size:10pt;font-family:Arial"><a href="http://www.designbuilder.co.uk/helpv3/Content/GreenRoof.htm?SearchType=Stem&Highlight=Green%7Cgreen%7C%7CRoof%7Croofs%7Croof%7CRoofs" style="text-decoration:none" target="_blank"><img src="http://www.designbuilder.co.uk/helpv3/Content/SkinSupport/DropDownOpen.gif" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;border-width:initial;border-color:initial;margin-right:5px">Green Roof Model Description</a></div>
<div><p style="margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif;font-size:10pt">As with a traditional <span style="font-weight:bold">roof</span>, the energy balance of an <span style="font-weight:bold">green</span> <span style="font-weight:bold">roof</span> is dominated by radiative forcing from the sun. This solar radiation is balanced by sensible (convection) and latent (evaporative) heat flux from soil and plant surfaces combined with conduction of heat into the soil substrate. This energy balance is illustrated in the diagram below. The variables introduced in this figure are defined in the<a href="http://www.designbuilder.co.uk/helpv3/Content/EnergyPlus_Documentation.htm" target="_blank">EnergyPlus Engineering Document</a>.</p>
<p style="margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif;font-size:10pt"> </p><p style="margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif;font-size:10pt;text-align:left">
<img src="http://www.designbuilder.co.uk/helpv3/Content/Resources/Images/Green%20roof_453x309.png"></p><p style="margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif;font-size:10pt;text-align:left">
<b>The energy balance for a green roof.</b></p><p style="margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif;font-size:10pt"> </p><p style="margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif;font-size:10pt">
The energy budget analysis follows the Fast All Season Soil Strength (FASST) model developed by Frankenstein and Koenig for the US Army Corps of Engineers. FASST was developed, in part, to determine the ability of soils to support manned and unmanned vehicles and personnel movement. In order to accomplish this, however, FASST tracks the energy and moisture balance (including ice and snow) within a vegetated soil. It is a one-dimensional model that draws heavily from other plant canopy models including BATS (Dickinson et al.) and SiB (Sellers et al.). FASST is implemented in EnergyPlus with only a few modifications to adapt it for use with a relatively thin soil layer.</p>
</div></div><h2 style="font-family:Arial,sans-serif;font-variant:small-caps;line-height:22px;font-size:11pt;margin-bottom:8pt;margin-top:12pt">Green roof data</h2><h3 style="font-size:11pt;font-family:Arial,sans-serif;margin-bottom:4.5pt;margin-top:7pt">
Height of Plants</h3><p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif">The average height of plants in the <span style="font-weight:bold">green</span> <span style="font-weight:bold">roof</span>.</p>
<h3 style="font-size:11pt;font-family:Arial,sans-serif;margin-bottom:4.5pt;margin-top:7pt">Leaf Area Index (LAI)</h3><p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif">
This is the projected leaf area per unit area of soil surface. It is a dimensionless number between 0.001 and 5.0. The tables below gives some typical values for LAI.</p><p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif">
</p><p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif">The table below is reproduced from <a href="http://daac.ornl.gov/VEGETATION/LAI_support_images.html#table" target="_blank">Global Leaf Area Index Data from Field Measurements</a>, 1932-2000</p>
<p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif"> </p><p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif">
<a href="http://www.designbuilder.co.uk/helpv3/Content/GreenRoof.htm?SearchType=Stem&Highlight=Green%7Cgreen%7C%7CRoof%7Croofs%7Croof%7CRoofs" target="_blank"><img src="http://www.designbuilder.co.uk/helpv3/Content/Resources/Images/LAI_thumb_0_72.jpg" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;width:60px;min-height:72px"></a></p>
<p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif"> </p><p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif">
The table below is reproduced from the PhD Thesis of Chen Yu entitled <a href="http://scholarbank.nus.edu.sg/handle/10635/15511" target="_blank">The intervention of plants in the conflicts between buildings and climate - A case study in Singapore</a></p>
<table style="margin-right:auto;width:1163px;margin-left:0px;font-family:'Times New Roman';caption-side:top"><colgroup><col style="width:327px"><col style="width:253px"><col style="width:414px"></colgroup><thead><tr>
<th style="text-align:left;vertical-align:middle;font-family:sans-serif;font-size:10pt">Plant description</th><th style="text-align:left;vertical-align:middle;font-family:sans-serif;font-size:10pt">Mean Leaf Area Index (LAI)</th>
<th style="text-align:left;vertical-align:middle;font-family:sans-serif;font-size:10pt">Picture</th></tr></thead><tbody><tr><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">"White flowers, spider lily"</td>
<td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">3.07</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle"><a href="http://www.designbuilder.co.uk/helpv3/Content/GreenRoof.htm?SearchType=Stem&Highlight=Green%7Cgreen%7C%7CRoof%7Croofs%7Croof%7CRoofs" target="_blank"><img src="http://www.designbuilder.co.uk/helpv3/Content/Resources/Images/image5_thumb_0_72.jpg" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;width:97px;min-height:72px"></a></td>
</tr><tr><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">"Pink flowers"</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">4.95</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">
<a href="http://www.designbuilder.co.uk/helpv3/Content/GreenRoof.htm?SearchType=Stem&Highlight=Green%7Cgreen%7C%7CRoof%7Croofs%7Croof%7CRoofs" target="_blank"><img src="http://www.designbuilder.co.uk/helpv3/Content/Resources/Images/image6_thumb_0_72.jpg" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;width:96px;min-height:72px"></a></td>
</tr><tr><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">"Yellow <span style="font-weight:bold">green</span> leaves"</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">
3.75</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle"><a href="http://www.designbuilder.co.uk/helpv3/Content/GreenRoof.htm?SearchType=Stem&Highlight=Green%7Cgreen%7C%7CRoof%7Croofs%7Croof%7CRoofs" target="_blank"><img src="http://www.designbuilder.co.uk/helpv3/Content/Resources/Images/image7_thumb_0_72.jpg" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;width:95px;min-height:72px"></a></td>
</tr><tr><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">"Dark <span style="font-weight:bold">green</span> long blades of leaves/grass"</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">
5.82</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle"><a href="http://www.designbuilder.co.uk/helpv3/Content/GreenRoof.htm?SearchType=Stem&Highlight=Green%7Cgreen%7C%7CRoof%7Croofs%7Croof%7CRoofs" target="_blank"><img src="http://www.designbuilder.co.uk/helpv3/Content/Resources/Images/image8_thumb_0_72.jpg" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;width:96px;min-height:72px"></a></td>
</tr><tr><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">"Pinkish red flowers"</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">2.44</td>
<td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">
<a href="http://www.designbuilder.co.uk/helpv3/Content/GreenRoof.htm?SearchType=Stem&Highlight=Green%7Cgreen%7C%7CRoof%7Croofs%7Croof%7CRoofs" target="_blank"><img src="http://www.designbuilder.co.uk/helpv3/Content/Resources/Images/image9_thumb_0_72.jpg" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;width:96px;min-height:72px"></a></td>
</tr><tr><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">"Fern-like"</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">6.59</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">
<a href="http://www.designbuilder.co.uk/helpv3/Content/GreenRoof.htm?SearchType=Stem&Highlight=Green%7Cgreen%7C%7CRoof%7Croofs%7Croof%7CRoofs" target="_blank"><img src="http://www.designbuilder.co.uk/helpv3/Content/Resources/Images/image10_thumb_0_72.jpg" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;width:96px;min-height:72px"></a></td>
</tr><tr><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">"Palm tree-like"</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">4.41</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">
<a href="http://www.designbuilder.co.uk/helpv3/Content/GreenRoof.htm?SearchType=Stem&Highlight=Green%7Cgreen%7C%7CRoof%7Croofs%7Croof%7CRoofs" target="_blank"><img src="http://www.designbuilder.co.uk/helpv3/Content/Resources/Images/image11_thumb_0_72.jpg" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;width:96px;min-height:72px"></a></td>
</tr><tr><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">"White flowers with yellow center"</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">
3.21</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle"><a href="http://www.designbuilder.co.uk/helpv3/Content/GreenRoof.htm?SearchType=Stem&Highlight=Green%7Cgreen%7C%7CRoof%7Croofs%7Croof%7CRoofs" target="_blank"><img src="http://www.designbuilder.co.uk/helpv3/Content/Resources/Images/image12_thumb_0_72.jpg" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;width:96px;min-height:72px"></a></td>
</tr><tr><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">"Small yellow <span style="font-weight:bold">green</span> leaves"</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">
4.08</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle"><a href="http://www.designbuilder.co.uk/helpv3/Content/GreenRoof.htm?SearchType=Stem&Highlight=Green%7Cgreen%7C%7CRoof%7Croofs%7Croof%7CRoofs" target="_blank"><img src="http://www.designbuilder.co.uk/helpv3/Content/Resources/Images/image13_thumb_0_72.jpg" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;width:96px;min-height:72px"></a></td>
</tr><tr><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">"Long big leaves"</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">5.28</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">
<a href="http://www.designbuilder.co.uk/helpv3/Content/GreenRoof.htm?SearchType=Stem&Highlight=Green%7Cgreen%7C%7CRoof%7Croofs%7Croof%7CRoofs" target="_blank"><img src="http://www.designbuilder.co.uk/helpv3/Content/Resources/Images/image14_thumb_0_72.jpg" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;width:96px;min-height:72px"></a></td>
</tr><tr><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">"Orange stems and leaves for those which are taller"</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">
2.15</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle"><a href="http://www.designbuilder.co.uk/helpv3/Content/GreenRoof.htm?SearchType=Stem&Highlight=Green%7Cgreen%7C%7CRoof%7Croofs%7Croof%7CRoofs" target="_blank"><img src="http://www.designbuilder.co.uk/helpv3/Content/Resources/Images/image15_thumb_0_72.jpg" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;width:96px;min-height:72px"></a></td>
</tr><tr><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">"No special features"</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">3.32</td>
<td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">
<a href="http://www.designbuilder.co.uk/helpv3/Content/GreenRoof.htm?SearchType=Stem&Highlight=Green%7Cgreen%7C%7CRoof%7Croofs%7Croof%7CRoofs" target="_blank"><img src="http://www.designbuilder.co.uk/helpv3/Content/Resources/Images/image16_thumb_0_72.jpg" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;width:96px;min-height:72px"></a></td>
</tr><tr><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">"Light <span style="font-weight:bold">green</span> edges with dark <span style="font-weight:bold">green</span> center leave blades"</td>
<td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">5.83</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle"><a href="http://www.designbuilder.co.uk/helpv3/Content/GreenRoof.htm?SearchType=Stem&Highlight=Green%7Cgreen%7C%7CRoof%7Croofs%7Croof%7CRoofs" target="_blank"><img src="http://www.designbuilder.co.uk/helpv3/Content/Resources/Images/image17_thumb_0_72.jpg" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;width:95px;min-height:72px"></a></td>
</tr><tr><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">"Red yellow tulip like flowers"</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">
3.04</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle"><a href="http://www.designbuilder.co.uk/helpv3/Content/GreenRoof.htm?SearchType=Stem&Highlight=Green%7Cgreen%7C%7CRoof%7Croofs%7Croof%7CRoofs" target="_blank"><img src="http://www.designbuilder.co.uk/helpv3/Content/Resources/Images/image18_thumb_0_72.jpg" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;width:96px;min-height:72px"></a></td>
</tr><tr><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">"Large red leaves"</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">2.33</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">
<a href="http://www.designbuilder.co.uk/helpv3/Content/GreenRoof.htm?SearchType=Stem&Highlight=Green%7Cgreen%7C%7CRoof%7Croofs%7Croof%7CRoofs" target="_blank"><img src="http://www.designbuilder.co.uk/helpv3/Content/Resources/Images/image19_thumb_0_72.jpg" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;width:96px;min-height:72px"></a></td>
</tr><tr><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">"Dark <span style="font-weight:bold">green</span> leaf blades"</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">
~0</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle"><a href="http://www.designbuilder.co.uk/helpv3/Content/GreenRoof.htm?SearchType=Stem&Highlight=Green%7Cgreen%7C%7CRoof%7Croofs%7Croof%7CRoofs" target="_blank"><img src="http://www.designbuilder.co.uk/helpv3/Content/Resources/Images/image20_thumb_0_72.jpg" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;width:96px;min-height:72px"></a></td>
</tr><tr><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">Tree</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">1.69</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">
<a href="http://www.designbuilder.co.uk/helpv3/Content/GreenRoof.htm?SearchType=Stem&Highlight=Green%7Cgreen%7C%7CRoof%7Croofs%7Croof%7CRoofs" target="_blank"><img src="http://www.designbuilder.co.uk/helpv3/Content/Resources/Images/image21_thumb_0_72.jpg" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;width:96px;min-height:72px"></a></td>
</tr><tr><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">Palm tree</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">2.37</td><td style="font-family:Arial;font-size:10pt;text-align:left;vertical-align:middle">
<a href="http://www.designbuilder.co.uk/helpv3/Content/GreenRoof.htm?SearchType=Stem&Highlight=Green%7Cgreen%7C%7CRoof%7Croofs%7Croof%7CRoofs" target="_blank"><img src="http://www.designbuilder.co.uk/helpv3/Content/Resources/Images/image22_thumb_0_72.jpg" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;width:96px;min-height:72px"></a></td>
</tr></tbody></table><p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif"> </p><h3 style="font-size:11pt;font-family:Arial,sans-serif;margin-bottom:4.5pt;margin-top:7pt">
Leaf Reflectivity</h3><p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif">The fraction of incident solar radiation that is reflected by the individual leaf surfaces. Solar radiation includes the visible spectrum as well as infrared and ultraviolet wavelengths. Values for this field must be between 0.1 and 0.4.</p>
<h3 style="font-size:11pt;font-family:Arial,sans-serif;margin-bottom:4.5pt;margin-top:7pt">Leaf Emissivity</h3><p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif">
This field is the ratio of thermal radiation emitted from leaf surfaces to that emitted by an ideal black body at the same temperature. This parameter is used when calculating the long wavelength radiant exchange at the leaf surfaces. Values for this field must be between 0.8 and 1.0 (with 1.0 representing “black body” conditions).</p>
<h3 style="font-size:11pt;font-family:Arial,sans-serif;margin-bottom:4.5pt;margin-top:7pt">Minimum Stomatal Resistance</h3><p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif">
This field represents the resistance of the plants to moisture transport. It has units of s/m. Plants with low values of stomatal resistance will result in higher evapotranspiration rates than plants with high resistance. Values for this field must be in the range of 50.0 to 300.0.</p>
<h3 style="font-size:11pt;font-family:Arial,sans-serif;margin-bottom:4.5pt;margin-top:7pt">Max volumetric moisture content of the soil layer (saturation)</h3><p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif">
Maximum volumetric moisture content of the soil depends on the properties of the soil and in particular the porosity.</p><h3 style="font-size:11pt;font-family:Arial,sans-serif;margin-bottom:4.5pt;margin-top:7pt">Min (residual) volumetric moisture content of the soil layer</h3>
<p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif">The minimum possible volumetric moisture content of the soil layer.</p><h3 style="font-size:11pt;font-family:Arial,sans-serif;margin-bottom:4.5pt;margin-top:7pt">
Initial volumetric moisture content of the soil layer</h3><p style="font-size:10pt;margin-top:0cm;margin-right:0cm;margin-left:0cm;margin-bottom:0.0001pt;font-family:Arial,sans-serif">The volumetric moisture content of the soil layer at the start of the simulation. The moisture content will be updated during the course of the simulation based on surface evaporation, irrigation and precipitation.</p>
<br><div class="gmail_quote">On Fri, Mar 2, 2012 at 8:38 AM, Nick Caton <span dir="ltr"><<a href="mailto:ncaton@smithboucher.com" target="_blank">ncaton@smithboucher.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div lang="EN-US" link="blue" vlink="purple">
<div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Karen,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Thank you very much for the feedback. I personally don’t have the cross-platform experience necessary to share such perspective, and it is not my goal to pretend
that I do, just trying to keep our community’s mutual efforts to help each other constructive =).<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">As well as I can predict the weather, I see myself adding EnergyPlus to my toolbox sooner or later as well. UI issues and other items collectively affecting
the time-efficiency of EnergyPlus are what I see as the greatest hurdle for myself and others… more easily dismissed if you have the time to burn, but harder to do so where time is a scarcer resource.
<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">In the meantime, myself and others are in the camp of needing to make do with the tools we are able to use with both accuracy and speed. I do not mean to argue
against learning new tools by sharing suggestions/means to approximate.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Thanks again for the input!<u></u><u></u></span></p><div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">~Nick<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><img width="119" height="37" src="cid:image001.jpg@01CCF85F.71FCB470" alt="cid:489575314@22072009-0ABB"></span><b><span style="font-size:11.0pt;font-family:"Stylus BT","sans-serif";color:#2d4d5e"><u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Stylus BT","sans-serif";color:#2d4d5e"><u></u> <u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-family:"Stylus BT","sans-serif";color:#2d4d5e">NICK CATON, P.E.</span></b><b><span style="font-family:"Stylus BT","sans-serif";color:#2d4d5e"><u></u><u></u></span></b></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Calibri","sans-serif";color:#cc9900">SENIOR ENGINEER<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Calibri","sans-serif";color:#cc9900"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2d4d5e">Smith & Boucher Engineers</span><span style="font-size:7.5pt;color:#cc9900"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2d4d5e">25501 west valley parkway, suite 200<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2d4d5e">olathe, ks 66061<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2d4d5e">direct <a href="tel:913.344.0036" value="+19133440036" target="_blank">913.344.0036</a><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2d4d5e">fax <a href="tel:913.345.0617" value="+19133450617" target="_blank">913.345.0617</a><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><a href="http://www.smithboucher.com" title="blocked::www.smithboucher.com" target="_blank"><span style="font-size:10.0pt">www.smithboucher.com</span></a></span><u><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:blue">
</span></u><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
</div><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Karen Walkerman [mailto:<a href="mailto:kwalkerman@gmail.com" target="_blank">kwalkerman@gmail.com</a>]
<br>
<b>Sent:</b> Friday, March 02, 2012 8:21 AM<br>
<b>To:</b> Nick Caton<br>
<b>Cc:</b> Nathan Miller; CleanTech Analytics; John Aulbach; <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a></span></p><div><div><br>
<b>Subject:</b> Re: [Equest-users] Green Roof - eQuest style<u></u><u></u></div></div><p></p>
</div><div><div>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Nick,<u></u><u></u></p>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">I used eQuest intensively for a time and recently moved most of my modeling to EnergyPlus. In addition to having more capabilities and being more flexible, EnergyPlus gets regular updates and bug fixes. EnergyPlus is also a total bear,
runs slowly compared to eQuest and doesn't have a fully functional user interface. I wouldn't recommend it to everybody.<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">eQuest is very good at modeling buildings that use fairly normal constructions with fairly normal HVAC systems. I have run into problems when modeling water to water heat pumps, central ventilation systems (with heat recovery), high thermal
mass buildings, and dessicant wheels, to name a few. While I've run into problems with EnergyPlus, I've either been able to resolve the issue with help from the EnergyPlus helpdesk, or, when my issue illuminated an underlying problem with source code, a bug
fix was incorporated into the next version.<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">I understand that eQuest/DOE2 is not receiving funding for updates and bug fixes of eQuest. A few years ago I tried to start a conversation around updates, bug fixes and feature improvements, and also suggested that we in the modeling
community fund some of this effort. There were quite a bit of responses from users to the "modeling wishlist," but few if any responses to the funding idea.<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">To extend your carpentry analysis, I think that the eQuest community needs to face the fact that the eQuest saw just isn't capable of cutting some of the species of wood coming into the shop these days.<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">--<u></u><u></u></p>
</div>
</div></div><div>
<p class="MsoNormal" style="margin-bottom:12.0pt">Karen<u></u><u></u></p>
<div><div><div>
<p class="MsoNormal">On Thu, Mar 1, 2012 at 7:03 PM, Nick Caton <<a href="mailto:ncaton@smithboucher.com" target="_blank">ncaton@smithboucher.com</a>> wrote:<u></u><u></u></p>
</div></div><div>
<div><div><div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Jeremiah,</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">While dumping eQuest entirely and (re?)starting a project using different software may certainly
be a viable solution, I think it’s reasonable to assume someone posting a “how do I do this in eQuest” question in forum titled [Equest-users] is probably not looking for such answers first! I personally understand EnergyPlus is often the tool-of-choice for
green-roof specific research, but let’s avoid telling a carpenter to throw away his hand saw just because power tools exist ;).</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">John,</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">eQuest can certainly *approximate* green roofs, to varying degrees of accuracy. There were a couple
long, informative, and unfortunately disjointed conversations on this exact topic held over the [bldg-sim] list some time ago. I’m attaching those messages including various attachments and white papers here in a zip file – if you can move these into a folder
in outlook or similar you may find it easier to follow the flow of the conversation...</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Read up on what’s been discussed so far, and I’m certain you’ll be able to decide for yourself how
comfortable you are using eQuest for your current project ;). </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Regards,</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">~Nick</span><u></u><u></u></p>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><img border="0" width="119" height="37" src="cid:image001.jpg@01CCF85F.71FCB470" alt="cid:489575314@22072009-0ABB"></span><u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Stylus BT","sans-serif";color:#2d4d5e"> </span></b><u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-family:"Stylus BT","sans-serif";color:#2d4d5e">NICK CATON, P.E.</span></b><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Calibri","sans-serif";color:#cc9900">SENIOR ENGINEER</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Calibri","sans-serif";color:#cc9900"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2d4d5e">Smith & Boucher Engineers</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2d4d5e">25501 west valley parkway, suite 200</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2d4d5e">olathe, ks 66061</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2d4d5e">direct
<a href="tel:913.344.0036" target="_blank">913.344.0036</a></span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2d4d5e">fax
<a href="tel:913.345.0617" target="_blank">913.345.0617</a></span><u></u><u></u></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a> [mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Nathan Miller<br>
<b>Sent:</b> Thursday, March 01, 2012 10:18 AM<br>
<b>To:</b> 'CleanTech Analytics'; 'John Aulbach'</span><u></u><u></u></p>
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<b>Cc:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] Green Roof - eQuest style<u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I suppose there is probably some benefit to a green roof, but I’ve never tried to claim credit for
it. </span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">At least in Seattle’s damp climate, when you would most benefit from the additional insulation of
a green-roof-layer (winter) is the same time of the year the growth medium will be saturated, and likely provide you with the least insulative value. In the summer, when you would actually want the heat to escape, the medium will dry out (unless you are irrigating
it). </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Soil has an insulative value of only around R-0.104/in (at least according to a table in the Seattle
Energy Code), so even ignoring moisture levels, it doesn’t seem like there is much benefit there.
</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I suppose in a heavy cooling climate the reflectivity of the plants might get you some benefit, as
well as the evaportative cooling effect if you are irrigating. Is that where the credit would be? Is there a thermal mass benefit?</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
<p class="MsoNormal" style="margin-top:1.0pt"><b><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#632423">Nathan Miller, PE, LEED AP BD+C</span></b><u></u><u></u></p>
<p class="MsoNormal" style="margin-top:4.0pt"><i><span style="font-size:8.0pt;font-family:"Verdana","sans-serif"">Mechanical Engineer/Senior Energy Analyst</span></i><u></u><u></u></p>
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<b><span style="font-size:8.0pt;line-height:115%;font-family:"Verdana","sans-serif";color:#632423">O
</span></b><span style="font-size:8.0pt;line-height:115%;font-family:"Verdana","sans-serif""><a href="tel:206-285-7100" target="_blank">206-285-7100</a><span style="color:#bfab7f">
</span>| <b><span style="color:#632423">D</span></b><span style="color:#a50021"> </span>
<a href="tel:206-788-4577" target="_blank">206-788-4577</a></span><u></u><u></u></p>
<p class="MsoNormal" style="margin-top:3.0pt"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><a href="http://www.rushingco.com/" target="_blank"><b><i><span style="font-size:8.0pt;font-family:"Verdana","sans-serif";color:#632423">www.rushingco.com</span></i></b></a></span><u></u><u></u></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a> [<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">mailto:equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>CleanTech Analytics<br>
<b>Sent:</b> Thursday, March 01, 2012 7:08 AM<br>
<b>To:</b> John Aulbach<br>
<b>Cc:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] Green Roof - eQuest style</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#336666">John,</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#336666">I advise you to use a more modern software that has the ability to correctly simulate the effects of a Green Roof
rather then some wacky eQuest work around. Professor David Sailor of Portland State University developed the Green Roof object for Energy Plus that uses a a finite difference algorithm and works well. The problem with
</span>eQuest<span style="font-family:"Verdana","sans-serif";color:#336666">/DOE2 is that it is based on a conduction transfer algorithm, and can not really emulate the effects of a Green Roof. If you need the easy to use inputs, I suggest Design Builder to
generate the Energy Plus file. </span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#336666">Best of luck, and feel free to ask if you need more about EP/DB..</span><u></u><u></u></p>
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<p class="MsoNormal">On Thu, Mar 1, 2012 at 6:04 AM, John Aulbach <<a href="mailto:jra_sac@yahoo.com" target="_blank">jra_sac@yahoo.com</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal">OK, my fellow Raiders of the Lost BTU..<br>
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What would be your advice for developing a green roof in eQuest? I am sure some of you have gone through the USGBC with hopes of getting this approved.<br>
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I eagerly await your suggestions with thanks.<span style="color:#888888"><br>
<br>
John Aulbach<br>
Partner Energy</span><u></u><u></u></p>
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<p class="MsoNormal">--
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<p class="MsoNormal"><i><span style="font-family:"Verdana","sans-serif";color:#999999">Jeremiah D. Crossett</span></i><u></u><u></u></p>
<p class="MsoNormal"><i><span style="font-family:"Verdana","sans-serif";color:#999999">CleanTech Analytics</span></i><u></u><u></u></p>
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<p class="MsoNormal"><a href="http://www.cleantechanalytics.com" target="_blank"><i><span style="font-family:"Verdana","sans-serif";color:#999999">www.cleantechanalytics.com</span></i></a><u></u><u></u></p>
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<p align="center" style="margin:0in;margin-bottom:.0001pt;text-align:center"><i><span style="font-size:8.5pt;font-family:"Droid Serif","serif";color:#cccccc;background:white">This document may contain valuable information proprietary to CleanTech Analytics
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><font size="4"><font face="verdana, sans-serif"><font color="#336666"> Jeremiah D. Crossett</font></font></font><div><font size="4"><font face="verdana, sans-serif"><font color="#336666">Energy Modeling Consultant </font></font></font></div>
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