Maher
The central plant with air source heat pump and possibly boiler
backup (gas/electric) can be modelled using EE4. The EE4 Version
1.70 Modelling Guide provides guidance in Section 4.6.4. The
modelling guide can be downloaded from
http://canmetenergy-canmetenergie.nrcan-rncan.gc.ca/eng/software_tools/ee4/modelling_guide.html
Use the seasonal efficiency of the air source heat pump. The "ground
source" is the heat exchanger. In your case the heat exchanger is the
air. You could be modelling a sea-water source heat-pump with backup
boiler.
The only caveat is that you cannot model a water-source heat pump
HVAC system if you use the Combination Ground Source Heat Pump plant.
It has been clearly stated in EE4 modelling guide. Basically, Air source
heat pump should be modeled as system rather than plants.
Regards,
Cheney
Maher
The central plant with air source heat pump and possibly boiler
backup (gas/electric) can be modelled using EE4. The EE4 Version
1.70 Modelling Guide provides guidance in Section 4.6.4. The
modelling guide can be downloaded from
http://canmetenergy-canmetenergie.nrcan-rncan.gc.ca/eng/software_tools/ee4/modelling_guide.html
Use the seasonal efficiency of the air source heat pump. The "ground
source" is the heat exchanger. In your case the heat exchanger is the
air. You could be modelling a sea-water source heat-pump with backup
boiler.
The only caveat is that you cannot model a water-source heat pump
HVAC system if you use the Combination Ground Source Heat Pump plant.
Chris Jones