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<h3><a name="_Toc226183797">Sunspace Elements</a></h3>
<p class="BodyTextArialBold"><font style="background-color: rgb(49, 106, 197);" color="#ffffff">Interior Windows</font></p>
<p class="MsoBodyText"><font style="background-color: rgb(49, 106, 197);" color="#ffffff">Interior windows</font> can be specified by following an <font style="background-color: rgb(49, 106, 197);" color="#ffffff">INTERIOR</font>-WALL command by
one or more <font style="background-color: rgb(49, 106, 197);" color="#ffffff">WINDOW</font>
commands. <font style="background-color: rgb(49, 106, 197);" color="#ffffff">Interior</font>
walls can have <font style="background-color: rgb(49, 106, 197);" color="#ffffff">windows</font>. The keywords for <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior windows</font> are the
same as those for exterior <font style="background-color: rgb(49, 106, 197);" color="#ffffff">windows</font>, with some exceptions:</p>
<p style="margin-left: 18pt;" class="MsoListNumber"><span style="font-family: 'Tms Rmn';">1. </span>The following keywords are
unused:<br><br>FRAME-WIDTH
SETBACK<br>GLARE-CTRL-PROB
SHADING-DIVISION<br>GLASS-TYPE-SW
SWITCH-CONTROL<br>GND-FORM-FACTOR
SWITCH-SCH<br>INF-COEF SWITCH-SET-HI<br>LEFT-FIN-A,
etc. SWITCH-SET-LO<br>OVERHANG-A, etc.
VIS-TRANS-SCH<br>RIGHT-FIN-A, etc. WIN-SHADE-TYPE</p>
<p style="margin-left: 18pt;" class="MsoListNumber"><span style="font-family: 'Tms Rmn';">2. </span>SKY-FORM-FACTOR multiplies the
total diffuse radiation incident on an <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior window</font>. If the <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior window</font> has a
setback (relative to the sunspace) or there are obstructions inside the sunspace
that shade the <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior
window</font>, a value of SKY-FORM-FACTOR less than 1.0 should be specified (the
default value is 1.0).</p>
<p class="MsoBodyText">Shading devices on <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior windows</font>, like Venetian blinds, drapes, or
pull-down shades, can be simulated via the keywords SHADING-SCHEDULE and
MAX-SOLAR-SCH. Movable insulation on <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior windows</font> can be modeled using keywords
CONDUCT-SCHEDULE and CONDUCT-TMIN-SCH.</p>
<p class="MsoBodyText">For an accurate calculation of the solar radiation
transmitted by a sunspace <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior window</font>, it is important to specify the X and Y
coordinates of the <font style="background-color: rgb(49, 106, 197);" color="#ffffff">window</font>. These coordinates are measured with respect to the
lower-left hand corner of the <font style="background-color: rgb(49, 106, 197);" color="#ffffff">INTERIOR</font>-WALL as viewed in the NEXT-TO space (see “<font style="background-color: rgb(49, 106, 197);" color="#ffffff">INTERIOR</font>-WALL Command” in
the <i>DOE-2.2 Dictionary</i>). The position of exterior <font style="background-color: rgb(49, 106, 197);" color="#ffffff">windows</font> should also be
carefully specified. The program will only recognize <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior windows</font> in an
<font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font> wall
between a sunspace and a non-sunspace.</p>
<p class="MsoBodyText">Sliding glass doors can be modeled as <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior windows</font>. If the
<font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font> wall
containing the glass door has AIR-FLOW-TYPE = FREE-DOORWAY (see WALL-PARAMETERS,
below), the door will be assumed to be open and convection through the opening
will be calculated if T(sunspace) - T(adjacent space) > AIR-FLOW-CTRL-DT.</p>
<p class="MsoBodyText">Additional control of the opening and closing of the door
can be obtained by using SS-FLOW-SCH (see description of ZONE keywords,
below).</p>
<p class="MsoBodyText">An unglazed opening in a sunspace <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font> wall can be
input as a <font style="background-color: rgb(49, 106, 197);" color="#ffffff">window</font>
with GLASS-TYPE-CODE = 0. The program will calculate the solar radiation passing
through the opening by using a transmittance of 1.0 for all angles of incidence.
WALL-PARAMETERS data, described below, would be entered for the <font style="background-color: rgb(49, 106, 197);" color="#ffffff">INTERIOR</font>-WALL to specify
the convective air flow through the opening.</p>
<p class="BodyTextArialBold"><font style="background-color: rgb(49, 106, 197);" color="#ffffff">Interior</font> Doors</p>
<p class="MsoBodyText">Unlike exterior walls, <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font> walls in cannot
have doors. However, an opaque <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font> door with a conductance significantly different
from the sunspace <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font> wall containing it can be input as a separate
<font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font> wall.
Alternatively, the door can simply be ignored if the conduction across it is
small compared to the overall conduction across the wall. The program will
calculate convection through a fully or partially open door if AIR-FLOW-TYPE =
FREE-DOORWAY and appropriate values of DOORWAY-H and DOORWAY-W are specified
(see WALL-PARAMETERS, below).</p>
<p class="BodyTextArialBold">Use Glass Type not Shading Coefficient for
Sunspaces</p>
<p class="MsoBodyText">You should use GLASS-TYPE-CODE rather than SHADING-COEF for
sunspace exterior <font style="background-color: rgb(49, 106, 197);" color="#ffffff">windows</font>. This allows the program to accurately calculate
the hourly direct and diffuse radiation transmitted by the glazing. This is not
possible with SHADING-COEF except for standard 1/8" clear glass.</p>
<p class="BodyTextArialBold">Use Custom Weighting Factors for Sunspaces</p>
<p class="MsoBodyText">Custom Weighting Factors (CWFs) should be used for
sunspaces for several reasons:</p>
<p style="margin-left: 18pt;" class="MsoListNumber"><span style="font-family: 'Tms Rmn';">1. </span>For high conductance spaces, the
precalculated (ASHRAE) weighting factors overestimate heating and cooling
loads. The overestimate can be as high as 25-30% for heavily glazed spaces.</p>
<p style="margin-left: 18pt;" class="MsoListNumber"><span style="font-family: 'Tms Rmn';">2. </span>CWFs account for loss of solar gain
due to reflection of sunlight back out of exterior <font style="background-color: rgb(49, 106, 197);" color="#ffffff">windows</font>.</p>
<p style="margin-left: 18pt;" class="MsoListNumber"><span style="font-family: 'Tms Rmn';">3. </span>CWFs give a more accurate
calculation of the generally large temperature swings in a solar-driven
space.</p>
<p style="margin-left: 18pt;" class="MsoListNumber"><span style="font-family: 'Tms Rmn';">4. </span>CWFs will automatically be
calculated for any space with FLOOR-WEIGHT = 0 (the default value). Otherwise,
the program will use ASHRAE weighting factors.</p>
<p class="BodyTextArialBold">Positioning Surfaces</p>
<p class="MsoBodyText">For an accurate calculation of solar radiation falling on
the <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font> walls
of a sunspace, the bounding surfaces of the sunspace need to be geometrically
positioned. This applies to the exterior walls and roofs and their associated
<font style="background-color: rgb(49, 106, 197);" color="#ffffff">windows</font>, and the
<font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font> walls and
their associated <font style="background-color: rgb(49, 106, 197);" color="#ffffff">windows</font>. We recommend that a sunspace <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font> wall be defined
in the sunspace rather than in the adjacent room. Otherwise, the adjacent room
must be properly located with respect to the sunspace. If this is not done, the
<font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font> walls and
<font style="background-color: rgb(49, 106, 197);" color="#ffffff">windows</font> will be
mispositioned relative to the sunspace exterior <font style="background-color: rgb(49, 106, 197);" color="#ffffff">windows</font>, and the
projection of solar radiation from the <font style="background-color: rgb(49, 106, 197);" color="#ffffff">windows</font> onto the <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font> walls will be incorrect. This will give a wrong
calculation of the solar radiation transferred from sunspace to room. Even in
this case, there will be no fictitious overall solar gain or loss since the
solar that stays in the sunspace plus that transferred to adjacent rooms is
constrained by the program to equal that entering the sunspace. There will,
however, be an error message if the transferred solar exceeds the entering
solar, which would give a net negative solar gain in the sunspace. This may
occur if <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font>
walls or <font style="background-color: rgb(49, 106, 197);" color="#ffffff">windows</font> on
them overlap, if a multiplier is used on an <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior window</font>, or if a
multiplier is used on rooms adjacent to a sunspace.</p>
<p class="BodyTextArialBold">Massive <font style="background-color: rgb(49, 106, 197);" color="#ffffff">Interior</font> Walls</p>
<p class="MsoBodyText">Sunspace <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font> walls are often fairly heavy, leading to a
significant time delay in the heat transfer across them by conduction. Such
walls should be described by response factors, i.e., with a delayed-type
construction.</p>
<p class="MsoBodyText">The order of defining layers in a delayed <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font> wall is from
"outside" to "inside", where "outside" is the side of the wall in the NEXT-TO
space, and "inside" is the side in the space in which the wall was defined. If,
as recommended, the <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font> wall is defined in the sunspace, then the outside
of the wall is the side in the adjacent room.</p>
<p class="MsoBodyText">Delayed conduction through <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font> walls is
calculated only for sunspace <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font> walls. For other <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font> walls the hourly
conduction is quick.</p>
<p class="MsoBodyText">Delayed conduction through an <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font> between two
non-sunspaces can be obtained simply by assigning SUNSPACE = YES to one of the
spaces, even though the space is not actually a sunspace. In this case, If the
solar flux on the "sunspace" side of the wall is small, it is recommended that
INSIDE-SOL-ABS = (0,0) be input for the wall in order to zero out absorption of
solar radiation. Otherwise, all <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font> and exterior walls and <font style="background-color: rgb(49, 106, 197);" color="#ffffff">windows</font> in the "sunspace"
should be geometrically positioned as described above in "Positioning of
Sunspace Surfaces".</p>
<p class="BodyTextArialBold">Moisture from Plants and Trees</p>
<p class="MsoBodyText">Atriums often have plants and trees. Moisture transpiring
from leaves and evaporating from soil can produce a significant latent load. You
can model this load using the source keywords in SPACE as follows:</p>
<p class="DOE-2Input"> SOURCE-TYPE = PROCESS<br>SOURCE-LATENT =
1.0<br>SOURCE-SENSIBLE = 0.0<br>SOURCE-POWER = [latent load in Btu/hr
or W]<br>SOURCE-SCHEDULE = U-name of schedule</p>
<p class="BodyTextArialBold">Baffles and Louvers</p>
<p class="MsoBodyText">Baffles and louvers on sunspace exterior <font style="background-color: rgb(49, 106, 197);" color="#ffffff">windows</font>, which block
and/or diffuse incoming beam radiation, can be modeled as blinds using the <font style="background-color: rgb(49, 106, 197);" color="#ffffff">WINDOW</font>-LAYERS keyword in
the <font style="background-color: rgb(49, 106, 197);" color="#ffffff">WINDOW</font> command.
See “<font style="background-color: rgb(49, 106, 197);" color="#ffffff">Window</font> Layers
Method” in the <font style="background-color: rgb(49, 106, 197);" color="#ffffff">Window</font> topic. The blinds can be <font style="background-color: rgb(49, 106, 197);" color="#ffffff">interior</font>, exterior or
between pane. They can be controlled in different ways to manage solar
gain.</p></div></div><br><br><div class="gmail_quote">On Thu, May 27, 2010 at 3:54 PM, Nick Caton <span dir="ltr"><<a href="mailto:ncaton@smithboucher.com">ncaton@smithboucher.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div link="blue" vlink="purple" lang="EN-US">
<div>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">Alan, </span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">To my understanding, you simply
cannot put a window on an interior wall. The best approximation may be as
follows:</span></p>
<p><span style="color: rgb(31, 73, 125);"><span>1.<span style="font: 7pt "Times New Roman";">
</span></span></span><span style="color: rgb(31, 73, 125);">Keep the internal
wall in it’s entirety – this will model heat transfer to the
adjoining space correctly… if it’s a large internal window consider
adjusting the internal partition’s properties to match the effective
thermal mass/U-value.</span></p>
<p><span style="color: rgb(31, 73, 125);"><span>2.<span style="font: 7pt "Times New Roman";">
</span></span></span><span style="color: rgb(31, 73, 125);">Create a new
external wall, of any construction layers, on top of the interior wall with the
exact (maybe rounded) area of the window</span></p>
<p><span style="color: rgb(31, 73, 125);"><span>3.<span style="font: 7pt "Times New Roman";">
</span></span></span><span style="color: rgb(31, 73, 125);">Create a window on
that exterior wall with that exact area and with matching properties to the
real glazing with one exception: Give it a ridiculously low U-value to effectively
eliminate what would be the modeled thermal transfer interactions with the
exterior.</span></p>
<p><span style="color: rgb(31, 73, 125);"><span>4.<span style="font: 7pt "Times New Roman";">
</span></span></span><span style="color: rgb(31, 73, 125);">Assign window shades
to model the solar shading effects of the adjacent space (ceiling/walls).</span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">Best of luck!</span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">~Nick</span></p>
<div>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"><img src="cid:image002.jpg@01CAFDC5.8CBBE830" alt="cid:489575314@22072009-0ABB" width="119" height="37"></span><b><span style="color: rgb(45, 77, 94);"></span></b></p>
<p class="MsoNormal"><b><span style="color: rgb(45, 77, 94);"> </span></b></p>
<p class="MsoNormal"><b><span style="color: rgb(45, 77, 94);">NICK CATON, E.I.T.</span></b><b><span style="font-size: 12pt; color: rgb(45, 77, 94);"></span></b></p>
<p class="MsoNormal"><span style="font-size: 7.5pt; color: rgb(204, 153, 0);">PROJECT ENGINEER</span><span style="font-size: 7.5pt; font-family: "Times New Roman","serif"; color: rgb(204, 153, 0);"></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: rgb(45, 77, 94);">25501 west
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<p class="MsoNormal"><span style="font-size: 10pt; color: rgb(45, 77, 94);">direct 913
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<p class="MsoNormal"><span style="font-size: 10pt; color: rgb(45, 77, 94);">fax 913
345.0617</span></p>
<p class="MsoNormal"><i><span style="font-size: 10pt; color: rgb(45, 77, 94);">Check out
our new web-site @ </span></i><span style="color: rgb(31, 73, 125);"><a href="http://www.smithboucher.com" title="blocked::www.smithboucher.com" target="_blank"><span style="font-size: 10pt;">www.smithboucher.com</span></a></span><u><span style="font-size: 10pt; color: blue;"> </span></u><span style="color: rgb(31, 73, 125);"></span></p>
</div>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p>
<div>
<div style="border-width: 1pt medium medium; border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; padding: 3pt 0in 0in;">
<p class="MsoNormal"><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;">
<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>
[mailto:<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>Jackson,
Alan<br>
<b>Sent:</b> Thursday, May 27, 2010 5:47 PM<div class="im"><br>
<b>To:</b> <a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br>
</div><b>Subject:</b> Re: [Bldg-sim] Interior window creation</span></p>
</div>
</div><div><div></div><div class="h5">
<p class="MsoNormal"> </p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">I am attaching the pd2 and inp,
just so someone can confirm they get the same error. I am on a 64-bit machine
so I have been getting weird warnings and error to begin with back when I was
using the wizard.</span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p>
<div>
<p class="MsoNormal" style="margin-bottom: 12pt; line-height: 15pt;"><span style="font-size: 8pt; color: rgb(31, 73, 125);">Alan
Jackson, LEED AP<br>
KlingStubbins</span><span style="color: rgb(31, 73, 125);"></span></p>
</div>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p>
<div>
<div style="border-width: 1pt medium medium; border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; padding: 3pt 0in 0in;">
<p class="MsoNormal"><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;">
<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>
[mailto:<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>Jackson,
Alan<br>
<b>Sent:</b> Thursday, May 27, 2010 6:43 PM<br>
<b>To:</b> <a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> [Bldg-sim] Interior window creation</span></p>
</div>
</div>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I am attempting to create an interior window to allow solar
gains to pass through a sunspace to an adjacent space. I am getting to the
following warning when attempting to create a window component on the interior
wall.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><img src="cid:image003.png@01CAFDC5.8CBBE830" width="428" border="0" height="119"></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">As a work around I changed the wall to EXTERIOR-WALL in
order to add the windows then planned on changing back to INTERIOR-WALL but
when I open the project I get a warning saying “A PARENT EXTERIOR-WALL
must be defined before ..”</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I know you can create interior windows and use them in conjunction
with sunspaces as the DOE2 manual specifically calls out this scenario. </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">What am I doing wrong?</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal" style="margin-bottom: 12pt; line-height: 15pt;"><span style="font-size: 8pt;">Alan Jackson,
LEED AP<br>
KlingStubbins</span><span style="font-size: 12pt; font-family: "Times New Roman","serif";"></span></p>
<p class="MsoNormal"> </p>
</div></div></div>
</div>
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