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<DIV>Hi Gerald,</DIV>
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<DIV>There are primarily two big loads on the system for indoor pools -- 1) evaporation and 2) ventilation. Evaporation amounts to almost 70% of heating load in an indoor pool (it's more than oudoor in many cases, since it does not see the sun and is occupied most of the year). If care isn't taken in conserving energy due to evaporation losses then the ventilation energy would increase for the space!.... that said, there is opportunity for savings and control of the environment. Simply covering the pool to mitigate wind factor and lessen the air-water interaction in non-use hours and not heating the water during those hours are the best way to conserve. </DIV>
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<DIV>Coming to your question, best way the size a system is to determine the extent of evaporation that will happen. The calculations can be quite cumbersome, but usually in practice corelation models are used to estimate the lb/sft.hr of water evaporated in the space. Once you have (pounds of water per sft per hour) being added to a space, I imagine it should be easy to incorporate that as a latent load in your model. There are some very useful studies available online explaining the correlation models and estimation of the evaporation potential. The one I particularly liked is <A href="http://www.hpac.com/microsites/egb/pdfs/shah_0304.pdf"><FONT color=blue>http://www.hpac.com/microsites/egb/pdfs/shah_0304.pdf</FONT></A> that takes into account an inactive pool condition as well as an active pool condition, with the difference between the two being significant. The author also indicates prior studies and correlations (empirical or otherwise) that might be useful
incase you don't want to use his. Apparently ASHRAE has one correlation in the Applications handbook that I have not looked into as yet.</DIV>
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<DIV>Other resourse useful to you might be the DOE, EERE website and the <STRONG>RSPEC</STRONG> tool:</DIV>
<DIV><A href="http://www.eere.energy.gov/consumerinfo/heatcool/hc_pool_heating.html">http://www.eere.energy.gov/consumerinfo/heatcool/hc_pool_heating.html</A></DIV>
<DIV>and finally, I like this following website for it's ease of use and clarity of its explanations, however it might be limiting in its scope:</DIV>
<DIV><A href="http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html">http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html</A> You may like to look up -- evaporation, saturation vapor pressure and related concepts.</DIV>
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<DIV>Hope this helps,</DIV>
<DIV>Neeraj Kapoor</DIV>
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<DIV>Senior Energy Engineer,</DIV>
<DIV>EMO Energy Solutions, LLC</DIV>
<DIV><A href="http://www.emoenergy.com/">www.emoenergy.com</A><BR><BR><B><I>Gerald Pde <geraldpde@yahoo.com></I></B> wrote: </DIV>
<BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">I am enquiring if there is a general strategy for<BR>modelling swimming pools preferably using eQUEST , and<BR>if so, are there are specific modelling tricks for<BR>this task. There have been discussion threads for<BR>pools from 2003 but those discussions have not touched<BR>on any general strategy for handling pool modelling.<BR>I have a recreation center of appx. 40,000sq.ft,<BR>including the pool, and what I am looking for is a<BR>conditioning system comparison between a typical VAV +<BR>chiller + boiler system, and a heat pump system that<BR>uses waste heat from other spaces to heat the pool<BR>itself as well as condition air in the pool hall and<BR>the rest of the building.<BR>The general questions I have in mind are how could one<BR>define a system which could mimic a heated pool, how<BR>would one define or assign latent load added to the<BR>space, and how would one define heat
losses from the<BR>pool. <BR><BR>Gerald<BR><BR><BR>__________________________________________________<BR>Do You Yahoo!?<BR>Tired of spam? Yahoo! Mail has the best spam protection around <BR>http://mail.yahoo.com <BR><BR>======================================================<BR>You received this e-mail because you are subscribed <BR>to the BLDG-SIM@GARD.COM mailing list. To unsubscribe <BR>from this mailing list send a blank message to <BR>BLDG-SIM-UNSUBSCRIBE@GARD.COM<BR><BR></BLOCKQUOTE></DIV></DIV></DIV></DIV></DIV><p>
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