Whats a realistic powerusage for Fans in PTAC Cooling

asked 2025-05-09 08:17:33 -0500

Alex89's avatar

I have an EnergyPlus Model which uses PTAC cooling with heating set to 0 Watt, an Availability Schedule which only allows it to run during the summer and most other uses left on standard values. It also cycles on and off with the Season, as well as the day night - cycle. The cooling power of the PTAC-Units is hard sized.

I have considered the Information from this thread https://unmethours.com/question/2567/...

Im wondering which power usage is realistic for the Fans. I have a model where the fans used more Power (6500kWh vs 6000) than the cooling Meter resulted in. With some changes i got the values to be around 1500 kWh hours for the Fans while the cooling load sits at around 6000 kWh for the year. This is in a not very hot German Climate Area.

Does anybody have any idea if that sounds proportional? I have included a screenshot of a timeseries which shows the current usage of cooling power vs Fan Power. image description

edit retag flag offensive close merge delete