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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>The highlighted yellow and that entire paragraph
nail it for me. It results in showing/taking the most effective steps to decrease
energy usage which should be the objective, regardless of percentage. Percent
savings is always very very subject to manipulation.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Andy <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Andy Hoover</span></font><font color=navy><span
style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Principal<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>The BEST Consultant, Inc.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Office: 678-200-7648<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Fax:678-827-0574<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Cell: 678-793-1159<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'><a href="http://www.thebestconsultant.com">www.thebestconsultant.com</a><o:p></o:p></span></font></p>
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<p><font size=1 color=gray face=Arial><span style='font-size:7.5pt;font-family:
Arial;color:gray'>This message may contain confidential and/or privileged
information. If you are not the addressee or authorized to receive this
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Varkie C Thomas<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, March 04, 2009
11:04 AM<br>
<b><span style='font-weight:bold'>To:</span></b> Varkie C Thomas<br>
<b><span style='font-weight:bold'>Cc:</span></b> bldg-sim@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Bldg-sim] Percent
Energy Savings</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>I received a few
responses to this message from outside the <st1:country-region w:st="on"><st1:place
w:st="on">USA</st1:place></st1:country-region> sent directly to me.
Below is the message again with some additional points in red. The
sections highlighted in yellow is from one of the responses<o:p></o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Varkie C Thomas<br>
<b><span style='font-weight:bold'>Sent:</span></b> 2009-03-03 18:26<br>
<b><span style='font-weight:bold'>To:</span></b>
bldg-sim@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Bldg-sim] Percent
Energy Savings</span></font><o:p></o:p></p>
<u2:p></u2:p>
<p class=MsoNormal><u2:p><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></p>
</u2:p>
<p class=MsoPlainText style='margin:0in;margin-bottom:.0001pt'><font size=3
face=Calibri><span style='font-size:12.0pt;font-family:Calibri'>ASHRAE Std90
for the baseline is already stringent and specifies the commonly used systems
& plants based on building type and size. Based on the CCGT
building, high percentage energy savings for LEED certification can be
achieved with low-rise buildings with a high exposure to floor surface areas
to locate PV panels, high but efficient glass to wall area for day-lighting,
the use of GSHP (which requires a large site area which may not be available
in city blocks), and low common energy consuming systems in baseline and
proposed which increases “percentage” energy savings. <u2:p></u2:p></span></font><o:p></o:p></p>
<p class=MsoPlainText style='margin:0in;margin-bottom:.0001pt'><font size=3
face=Calibri><span style='font-size:12.0pt;font-family:Calibri'><u2:p> </u2:p></span></font><o:p></o:p></p>
<p class=MsoPlainText style='margin:0in;margin-bottom:.0001pt'><font size=3
face=Calibri><span style='font-size:12.0pt;font-family:Calibri'>A school
building is low-rise, is low in process loads (increases % savings) and is
high in occupancy ventilation which allows for air-to-air heat recovery. It
operates only during the day increasing the impact of day-lighting. It is
closed in summer, reducing the annual cooling load and increases the impact
of solar heating during the rest of the year in cold climates. So it is
possible to achieve zero energy usage. <u2:p></u2:p></span></font><o:p></o:p></p>
<p class=MsoPlainText style='margin:0in;margin-bottom:.0001pt'><font size=3
face=Calibri><span style='font-size:12.0pt;font-family:Calibri'><u2:p> </u2:p></span></font><o:p></o:p></p>
<p class=MsoPlainText style='margin:0in;margin-bottom:.0001pt'><font size=3
face=Calibri><span style='font-size:12.0pt;font-family:Calibri'>The choices
are limited in the case of inner city high-rise buildings. Today’s
high-rise office building design tries to maximize the glass percentage which
increases the impact of day-lighting. The glass could have PV
properties with a very small overall efficiency of converting light to 110V
electricity. The ASHRAE Std90 baseline for Systems and Plants for such
a building is considered normal design. UFAD and other options are not
typical. The proposed envelope has to offset the 40% Window-Wall-Ratio
specified by ASHRAE.<u2:p></u2:p> <font color="#c00000"><span
style='color:#C00000'>If the office building envelope is used for a hospital
or hotel, which operate 8760 hours/year, then the percent energy savings will
go down.</span></font> <o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin:0in;margin-bottom:.0001pt'><font size=3
face=Calibri><span style='font-size:12.0pt;font-family:Calibri'><o:p> </o:p></span></font></p>
<p class=MsoPlainText style='margin:0in;margin-bottom:.0001pt'><font size=3
face=Calibri><span style='font-size:12.0pt;font-family:Calibri;background:
yellow'><u2:p></u2:p>High percent energy savings does not therefore
necessarily mean a better or optimized designed building</span></font><font
face=Calibri><span style='font-family:Calibri'> in terms of the client’s interests.
<span style='background:yellow'>Percent energy savings should therefore not
be the criteria for energy efficient building design. It should be
based on Energy Conservation Measures (ECM) used for the given building that
are more energy efficient compared to ASHRAE Std90 for the given building
type and size which usually results in increased first costs.</span> The ECMs
are going to be different for different types of buildings in different
locations. If the ECM used is inappropriate, then the client pays a
price for the high percent energy savings.<u2:p></u2:p></span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color="#c00000" face="Times New Roman"><span
style='font-size:12.0pt;color:#C00000'>In my opinion the way to express energy
efficiency would be energy per unit area. Occupancy per unit area has to be
defined for different types of buildings (office, hotel, retail, hospital,
etc.) and energy efficiency should also take into account location based on HDD
& CDD. Energy per Person will account for overall energy efficiency of
buildings & transportation when designing sustainable townships.<o:p></o:p></span></font></p>
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