I'm modeling a heat recovery chiller in openstudio v2.8.1 using the centralheatpump object. I noticed that under mode 2 (heating only), the chiller heater heating electric power seems always be constant regardless of the heating output, with a very low COP (e.g. 0.2, 0.3 etc). Compared to the cooling mode (mode 3), the COP is around 1, which seems more reasonable.
And as a result, the annual heating energy is skyrocketing (about 5 times the cooling energy, in San Francisco, where the climate is pretty mild).
Anyone knows what's causing this?
