[Bldg-sim] Swimming pool modeling

[Fred Porter]

My understanding (from some long-forgotten reference, possibly authoritative, possibly not) has always been that the evaporative cooling effect accrues to the pool itself and the pool heater offsets it, and I have not modeled as a cooling load in/to the space. But I could imagine that part of that evaporation does cool the space. 

Fred Porter
AEC

>>> "Doug Maddox" <DougM at TWGI.com> 1/30/2008 9:09 AM >>>

The evaporation has a cooling effect that needs to be accounted for with a sensible source load in the model.
 
Doug Maddox
The Weidt Group
 



From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Demba Ndiaye
Sent: Wednesday, January 30, 2008 10:54 AM
To: bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Swimming pool modeling
 
Dusko, 
 
That’s also the methodology I followed for a recent project in eQuest. 
You can find an equation for the evaporation rate in the ASHRAE Applications Handbook. Another source is http://www.rlmartin.com/rspec/whatis/index.html.
 
Hope this helps.
______________
Demba Ndiaye



From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Zarske, Jim
Sent: Wednesday, January 30, 2008 10:33 AM
To: Dusko Nikolic; bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Swimming pool modeling
 
I cannot comment on Energy+.  However, as far as eQUEST, I've modeled a natatorium (indoor pool) including the latent load.  In one of the ASHRAE books, there's a methodology for determining the latent loads of a pool as a function of activity, water temperature, and I believe a few other factors.  I ran through these calculations and inputted this load into the "Internal Energy Sources" under the Equipment internal gains tab.  I created a schedule based on when the proposed pool cover would be off (pool in use), and called it a "process" load. I believe I set the Latent HG ratio to 1.0 and Sensible to 0.
 
The results of my model seemed to be reasonable.  
 
Maybe with this methodology, it might allow you figure something out with Energy+; otherwise, eQUEST may be your best, closest approximation, for this project.



From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Dusko Nikolic
Sent: Wednesday, January 30, 2008 2:20 AM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Swimming pool modeling
Hi,

Is it possible to model swimming pool in Energy+? I could not find the way to model latent loads due to water evaporation



Thanks



Dusko Nikolic
Mechanical Building Services Engineer
MWH New Zealand Ltd                         DDI:  (64-9) 580 4531
Level 2, Building C, Millennium Centre    Fax: (64-9) 580 7600
600 Great South Road
PO Box 12-941, Penrose
Auckland, New Zealand

http://www.mwhglobal.com/nz
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