Re: [TRNSYS-users] Queries about radiator Type 1231 combined with variable capacity heat pump

[David BRADLEY <d.bradley@tess-inc.com>]

Khoa Le,

 I would encourage you to look at the Type1231 documentation and/or source code. It is not a complicated Type mathematically and I suspect that you could use its governing equations to adjust the model's parameters and obtain the kind of delta T that you are observing in your measurements.

kind regards,

 David

On 04/05/2018 18:05, Le Khoa via TRNSYS-users wrote:

Hi everyone,

I have modeled the system comprising of a variable capacity heat pump (custom component) transferring heat to the house via radiators Type 1231 (TESS library). From the simulation results, the differences between entering and leaving water temperature of radiators are within 7 Celcius, meaning the heat pump quickly operates at the lowest part load. However, I want to increase those temperature differences about more than 10 Celsius, as observed from our measurement results, in order to force the heat pump to work at higher load. I have tried to alter the parameters of Type 1231 but it seems to be uninfluenced. I see if changing the flow rate can alter those differences, but that is not right for my model which affects the heat pump side. 

Could you please help me if possible?

Thank you.

         

Khoa Le.

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