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
Attachment:
Project.zip
Description: Zip archive