[Bldg-sim] Swimming pool modeling

[Doug Maddox]

I'm not sure how it breaks down between pool load and air load, but I
think it is part of the building heating load in either case.

 

Doug Maddox

The Weidt Group

 

________________________________

From: Fred Porter [mailto:FPorter at archenergy.com] 
Sent: Thursday, January 31, 2008 11:05 AM
To: bldg-sim at lists.onebuilding.org; Doug Maddox
Subject: Re: [Bldg-sim] Swimming pool modeling

 

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 <http://www.mwhglobal.com/nz> 
 

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