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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>We are looking at trying to simulate the performance of
greenhouses with and without heat curtains. The concept of the heat
curtain is basically to trap the heat inside the greenhouse so that it doesn’t
radiate back out to the sky at night. The energy savings will occur by a
reduction in the use of heaters to keep the temperature above a preset minimum
desired setpoint.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Someone suggested eQuest may be able to do this, but I
recall that there were some solar simulation tools around back when I was in school.
My instinct tells me these are probably better tools for tracking the amount of
energy the greenhouse would store throughout a given day then eQuest. Is
this an unfair assumption? Has anyone performed an eQuest model similar to
the one I am describing in eQuest before?</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks,</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Eric Kirchhoff, PE</span></font></b></p>
<p class=MsoNormal><i><font size=1 face=Arial><span style='font-size:8.0pt;
font-family:Arial;font-style:italic'>EE Engineering Supervisor</span></font></i></p>
<p class=MsoNormal><i><font size=1 face=Arial><span style='font-size:8.0pt;
font-family:Arial;font-style:italic'>Customer Programs</span></font></i></p>
<p class=MsoNormal><b><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy;font-weight:bold'>Southern
California Gas Company</span></font></b></p>
<p class=MsoNormal><em><i><font size=1 color=navy face=Arial><span
style='font-size:6.0pt;font-family:Arial;color:navy'>a Sempra Energy Utility</span></font></i></em></p>
<p class=MsoNormal><font size=1 face=Arial><span style='font-size:8.0pt;
font-family:Arial'>555 West Fifth Street, GT28A4, Los Angeles, CA 90013</span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span style='font-size:8.0pt;
font-family:Arial'>tel: (213) 244-4228 fax: (213) 244-8252</span></font></p>
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12.0pt'> </span></font></p>
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