There is indeed a heat pump type DHW heater in eQUEST. Note that this is an air source heater with the condenser outside. As such, the COP diminishes quite a bit from the rated value in colder climates.
If instead you have a water source heat pump with a relatively stable condenser temperature and COP, I tend to model with an electric DHW heater with an EIR of 1/COP.
Yes and yes.
There is indeed a heat pump type DHW heater in eQUEST. Note that this is an air source heater with the condenser outside. As such, the COP diminishes quite a bit from the rated value in colder climates.
If instead you have a water source heat pump with a relatively stable condenser temperature and COP, I tend to model with an electric DHW heater with an EIR of 1/COP.
Brian
Footprint
To foot stomp the condenser note; the default performance curves seem to be extremely conservative compared to equipment available today.
Anthony Hardman, PE, LEED AP BD+C
Senior Building Performance Analyst, Owner
The Green Engineer | Sustainable Design Consulting
D: 978.341.5459 | O: 978.369.8978
E: anthony at greenengineer.com