[BLDG-SIM] Modeling a pool in eQuest [mistake in 1st email]

[Brian Fountain]

The Canadian pool tool referred to (I believe) is Enerpool – available
at:
http://www.canren.gc.ca/dtt/index.cfm

It models indoor & outdoor pools with / without solar blankets, solar
collectors & auxillary heaters.  It uses TMY weather data (supplied
for some US & Canadian sites depending on which version you download).
Pool area air temperature, humidity and ventilation rate are constant
for all hours of the simulation and there is no accounting of the
energy to condition the pool area air.

For interest the hourly outputs available (is SI) are:

HOURLY PRINTOUTS: ENERGIES
Passive Gain                          "QPass"     [J]   : -
Active Gain                           "QAct"      [J]   : -
Auxiliary Gain                        "QAux"      [J]   : -
Total Gain                            "QGain"     [J]   : -
Evaporative Losses                    "QEvap"     [J]   : -
Convective Losses                     "QConv"     [J]   : -
Conductive Losses                     "QCond"     [J]   : -
Radiative Losses                      "QRad"      [J]   : -
Side Losses                           "QSide"     [J]   : -
Spill and Makeup Losses               "QMakeup"   [J]   : -
Total Losses                          "QLoss"     [J]   : -
Residual Energy Gain                  "QRes"      [J]   : -
Available Solar Energy                "QInc"      [J]   : -
Solar Energy Collected                "QColl"     [J]   : -
Energy Lost through Piping            "QPipes"    [J]   : -
Energy Gain from Pumps                "QPumps"    [J]   : -

HOURLY PRINTOUTS: POOL
Pool Temperature                      "TPool"     [C]   : -
Mains Temperature                     "TMains"    [C]   : -
Makeup Water                          "MdotMakeup"[kg/s]: -
Soil Temperature around Pool          "TSoilPool" [C]   : -

HOURLY PRINTOUTS: WEATHER

Global Horizontal Irradiance          "HGlo"      [W/m2]: -
Ambient Dry Bulb Temperature          "TAmb"      [C]   : -
Ambient Relative Humidity             "RelHum"    [0-1] : -
Ambient Wind Speed                    "VWind"     [m/s] : -
Pool Direct Horizontal Irradiance     "HDirPool"  [W/m2]: -
Pool Diffuse Horizontal Irradiance    "HDifPool"  [W/m2]: -
Pool Dry Bulb Temperature             "TAmbPool"  [C]   : -
Pool Relative Humidity                "RelHumPool"[0-1] : -
Pool Wind Speed                       "VWindPool" [m/s] : -
Sky Temperature                       "TSky"      [C]   : -

HOURLY PRINTOUTS: COLLECTORS/PIPES/HEAT EXCHANGER
Collector Inlet Temperature           "Tci"       [C]   : -
Collector Outlet/Plate Temperature    "Tco"       [C]   : -
Collector Flow Rate                   "MdotColl"  [kg/s]: -
Inlet Pipe Input Temperature          "TPipeIn"   [C]   : -
Outlet Pipe Output Temperature        "TPipeOut"  [C]   : -
Temperature of Soil around Pipes      "TSoilPipe" [C]   : -
Exch. Temperature Out, Cold Side      "TXColdOut" [C]   : -
Exch. Temperature Out, Hot Side       "TXHotOut"  [C]   : -
Exch. Flow Rate                       "MdotExch"  [kg/s]: -

HOURLY PRINTOUTS: CONTROLS
Activity Level in Pool                "Activity"  [0-2] : -
Blanket On                            "BlanketOn" [0/1] : -
Collector On                          "CollOn"    [0/1] : -
Auxiliary Heater On                   "AuxOn"     [0/1] : -


I have not tried feeding these inputs back into eQUEST – although it
sounds like fun.

Bonne chance.

Brian Fountain

____________________________________________

-----Original Message-----
From: BLDG-SIM at gard.com [mailto:BLDG-SIM at gard.com] On Behalf Of Fred
Porter
Sent: July 30, 2007 7:44 PM
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] Modeling a pool in eQuest [mistake in 1st email]

Sure, pools have been "modeled" in DOE-2.2/eQuest. But: 

The evaporation from the pool depends on the temperature and moisture
of air in the pool room which will depend on the operation and
setpoints of any HVAC alternatives. But in DOE-2, no feedback exists. 

Furthermore, many of the interesting options for dehumidification
involve system configurations, and perhaps controls, that are not
represented by the program. (Wrap-around heat pipes, etc., check the
descriptions in the catalogs) 

For heat recovery in Vermont winters, be sure to turn FROST-CONTROL on
in the HR settings. And hope the program doesn't hang. 

I thought someone, in Canada perhaps, had a single-purpose indoor pool
program. Or there's TRNSYS. 

-- 
Fred W. Porter, B.S., LEED A.P.
Senior Engineer
Architectural Energy Corp.

   
From: Karen Walkerman [mailto:kwalkerman at gmail.com] 
Sent: Monday, July 30, 2007 7:45 AM
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] Modeling a pool in eQuest [mistake in 1st email] 

Oos.  That's 55 lbs/hr total, not per sf. 
On 7/30/07, Karen Walkerman <kwalkerman at gmail.com> wrote: 
Hello All, 
  
Has anyone modeled a pool in eQuest?  I am modeling a space that
contains a 24 X 44 foot pool.  I'm estimating 55 lbs/hr of evaporation
per sf of surface area (for any period of time when the pool is
uncoverd).  At a minimum I need to model space dehumidification and
the energy needed to heat the pool and replacement water.  I checked
the help files and am using a reheat fan system, as suggested. 
  
I can simply input a latent load into the space to simmulate the
humidity, and manually calculate and input an energy load for pool
heat, but I'd like to do better. 
  
Thanks,


-- 
Karen Walkerman
802-238-0980
kwalkerman at gmail.com 



-- 
Karen Walkerman
802-238-0980
kwalkerman at gmail.com 


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