[TRNSYS-users] pool temp of outdoor pool Type 344

[David BRADLEY]

Nidal,
   I have been using Type344 quite a lot lately and have not had trouble 
with it. I can think of a number of possible causes for the behavior 
that you describe but without seeing the project it is not possible to 
know which one is the trouble. I think the critical thing to do is to 
use a Type65 to look at the values of inputs 15 and 16 to the pool (of 
course you will have to look at the outputs of whatever Type is 
connected to those inputs; a pump perhaps or the outlet of the solar 
collector). When you know what the inlet temperature and mass flow rate 
of heating water to the pool are, it should be obvious whether such a 
volume at such a temperature is able to change the pool's temperature.

1. it could be that you have so few collectors in comparison to the size 
of the pool that the collector system can't affect the pool.
2. if could be that the controller that determines when the collector 
system needs to run is not working the way that you expect it to.
3. it could be that the evaporative, convective, and radiative thermal 
losses from the pool are large in comparison to the energy input from 
the heating system and that the pool is completely dominated by its 
surroundings and not by the system.

Another thing to try is to disconnect the solar collector system and put 
in an imaginary source of hot water (just set the inlet temperature to a 
constant value and turn an arbitrary mass flow rate on and off with a 
controller. Verify that the pool temperature is affected by those inputs.

Kind regards,
  David


On 7/15/2012 01:42, Nidal Abdalla wrote:
> Dear All
> I am wondering if type 344 related with outdoor swimming pool have 
> been updated or not. In fact, I tried to heat the pool using solar 
> system by connecting the solar collector via input number 15 and 16, 
> but I found that the temperature of the pool wasn't raised regardless 
> of the collector area. Do you any suggestions in this regards?
> Best Regards
> Nidal Abdalla
>
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at cae.wisc.edu
> https://mailman.cae.wisc.edu/listinfo/trnsys-users

-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com



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