Hi All, @MingboPeng
Do you know how to calculate the COP and SEER of the Air Source Heat pump for cooling and heating mode based on outdoor air temperature?
Heating/cooling Coil Performance Curves work based on what?
do you have any resources to explain these numbers and processes?
thank you for your help
For heating:
COP_heating = Input Power (kW)/Heating Capacity (kW)
For cooling:
COP_cooling = Input Power (kW)/Cooling Capacity (kW)
SEER= Total Electric Energy Input (Wh)/Total Cooling Output (Btu)
SEER is usually for the cooling.
ASHRAE 90.1 provides guidelines for SEER and COP calculations and HVAC performance.
Thanks, @behnammmohseni for your explanation.
but the main question for me is whether this performance curve is present here that connects with outdoor air temperature or not?
You’re welcome.
For each component, PTHP, PTAC, etc, there is constant reference COP and usually, there are more than 2 other factors influencing the COP. They are usually for the temperature (outdoor drybulb temperature) correction and flow correction . If you are interested in having a precise measurement, you need to follow global standards like ASHRAE and also local standards according to the vendor. Find the parameters and put that parameter in a panel inside the Grasshopper; then you need to write all the required factors, based on the timestep. The final COP will not be shown directly from IronBug, but the analysis inside the simulation is based on the realistic COP that has formulas, curves, etc and IronBug will do that.
Great @behnammmohseni
how do we extract this COP is calculated by Ironbug as output? Is it possible to find this result?
By extracting the exact formula, then writing the needed parameters using IB_OutPutParams and other factors such as Drybulb temperature from EPW.
Highly recommended to double check the IDF to make sure the curve formula is written correctly.
