[TRNSYS-users] unmet cooling load with Type 665.

[simge andolsun]

Hi!

I modeled a 20m*20m*3m building with a 3m high unconditioned attic. I
defined the attic as a separate zone and conditioned only the
inhabited space (SPACE1) below. I used type 665 to model an air-source
heat pump system and tried to meet the heating and cooling loads of
the inhabited space (SPACE1). I am sending the necessary files as
attached to this file. Attached folder also contains the window data
file (W4-lib) and the weather file (austintxDOE2EPW) that you will
need to run the file. You can run the file and see that, during the
summer, the temperature of the inhabited space (SPACE1) exceeds the
cooling setpoint temperature while cooling rate stays almost constant.
This made me think that there might be a cooling coil capacity limit
somewhere, which I could not figure how to modify/change. I suppose
TRNSYS actually autosizes the cooling coil in Type 665. What might be
the parameter that is limiting this capacity? ...or is there some
other reason? Could you please help me figure out why I am not able to
meet the cooling loads in the attached model?

Thanks in advance for your time,
Best Regards,
Simge Andolsun
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