Hello!
Background
I'm currently modelling systems in ATL and am trying to better understand how to back out hourly COP values for heat pumps from timeseries data.
Naively I would have thought that I should take the "My Design - End Use: Electricity: Heating (kWh)" output and add it to the "My Design - End Use: Electricity: Heating Fans/Pumps (kWh)" to get the total electricity used for that given time period. We would then divide "My Design - Load: Heating: Delivered (kBtu)" by this value to get the COP (Of course converting kBtu -> kWh first). I modeled these with ducts in conditioned spaces for minimal duct losses if that makes a difference.
If I do this, I get COP values that are well above what I would expect for a heat pump under given ambient temperatures, for example a COP of 4 at 30F and 6 at 55F. The average COP for ATL across the year was 4.11, which seems very high for a relatively cold city.
Question
It seems I am incorrectly calculating the COP - how do I back out the Heat Pump COP from the timeseries data?
Thank you in advance!
