[TRNSYS-users] TYPE 941

[David BRADLEY]

Type941 models a heat pump that has a single speed compressor and a 
single speed fan. The device's capacity (the maximum amount of energy 
that it can transfer to/from the air) is a function of the inlet water 
temperature and the inlet air dry bulb temperature. It is not a function 
of the air flow rate. Changing the air flow rate will change the air 
outlet temperature but not the energy transferred to/from the air.

As a side note, there are some models of multistage and variable speed 
compressor heat pumps in which the capacity is a function of the air 
flow rate as well as of the inlet temperatures.

kind regards,

  David


On 06/07/2022 10:59, Jen parken via TRNSYS-users wrote:
> hello all
> I have a question about type 941
> why whenever i change the amount of inlet air flow rate, the value of 
> "heat transfer to air" doesn't change?
> even though the value of output air flow rate (output6) changes when i 
> change the value of the inlet flow rate
> I went through the equations in the documentation and i found that the 
> heat transfer to air depends on the flow rate
> please correct me if i am wrong
> thanks
>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy System Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI  53703 USA

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

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