If this is a south-western facing room, this makes sense. For spaces with alot of glass, peak cooling loads typically occur in the fall when the sun sits lower in the sky. For a western or south-western facing room, at 5pm in October, the sun is shining directly into the windows. With a 62 degree outdoor air temperature, conductive losses are low, so the heat gained by the space does not have a chance to leave (as it would in December, with temperatures in the 30's). Solar gain trumps all other cooling loads in spaces with large window areas. You could try modeling an alternative with a really low SHGC glass, or exterior vertical shades and see how this affects the peak.<br>
<br>While this is the peak space load, this may not be the peak coil load as ventilation is not taken into account in the LS-B report (drives me crazy). It all depends on whether ventilation air is conditioned before it arrives at the terminal coils or not...<br>
<br>--<br>Karen<br><br><br><br><div class="gmail_quote">On Tue, Jul 8, 2008 at 9:30 AM, Tobias, Mike <<a href="mailto:mtobias@loringengineers.com">mtobias@loringengineers.com</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
The LS-B Space Peak Load Components Report shows my peak cooling load<br>
for a perimeter hotel room with windows occurring on Oct 2 at 5pm when<br>
its 62F outside in new york city. I believe this is an error. My peak<br>
heating load for this space appears correct occurring on jan 23 at 8am.<br>
Solar radiation dominates the total space load at 75% of the total<br>
cooling load. The overall building peak cooling load occurs on July 1<br>
at 8pm when its 92F outside which appears correct. What do you think?<br>
<font color="#888888"><br>
Mike Tobias PE<br>
<a href="mailto:mtobias@loringengineers.com">mtobias@loringengineers.com</a><br>
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