[TRNSYS-users] TES in chiller plant

Thu Aug 24 09:06:37 PDT 2017

Hilal,
  When you say that the tank takes a longer time to charge than expected, it seems there are two possibilities: one, that Type60 has got a problem in its algorithms or two, that the heat transfer out of the tank is lower than you're expecting. I have not used Type60 in a cooling application before and I have had some trouble with its heat exchanger algorithm breaking down. If you are extracting energy from the tank by means of the heat exchanger, that could be part of the problem. If you have access to Type534 in the TESS Storage tank library, I would highly recommend switching to that tank model. If you are extracting energy from the tank by means of water flow through the tank (ie there is no heat exchanger) then make sure that there is not something in Type60 that is fighting against the cooldown; for instance make sure that the auxiliary heaters in the tank are not trying to keep it warm while you're trying to cool it down.
kind regards,
  David

On 08/24/2017 09:44, Hilal Alquabeh via TRNSYS-users wrote:
> Hello everyone hope this emails finds you very well,
> I’m doing a simple simulation of water cooled chiller and one of the components is cold Thermal energy storage for load shifting purposes.
> The results looks promising except that of the cool storage using the TYPE 60 , I found it take long time to charge it (change its avg. temperature from initial to supply water temp), periods reach hundreds of hours ! Although the tried to manipulate all the parameter almost and used different types from TESS library and ordinary. Anyone knows what could be the problem?
> Note: the results are converged.
> Thank you
>
> Hilal Alquabeh
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