EcoRenovator - View Single Post - Where is this idea flawed / how to guestimate efficiency?

Robl · 04-06-22, 01:48 AM

I just looked up EER, SEER - as a UK person these terms have been on the edge of my consciousness for some time! We get COP and SCOP here. So:

COP (Coefficient Of Performance) is Power out / Power used. Used for heating or cooling, same units used, so is just a ratio, needs conditions (Tin, Tout stating, usually in degC). COP heating is generally COP cooling+1, if the conditions are similar - heating or cooling is often unstated, and causes confusion. For a compressor it will generally be cooling stated as this is the thermal power moved by the fluid.

SCOP (Seasonal COP) tries to use appropriate conditions for your region, and needs Tout stating. I've only seen it used for heating, but I'm in the UK:-)

EER is COP but in (Btu/h)/kW and cooling specific.

SEER is Seasonal EER.

Suprisingly I found a simple EER to SEER link in a webpage - surely this is just an empirical formula that works sometimes in some places with some heatpumps?:
EER = 1.12 * SEER - 0.02 * SEER^2
https://power-calculation.com/EER_SE...nditioning.php

04-06-22, 01:48 AM	#11
Robl Helper EcoRenovator Join Date: Oct 2020 Location: Cambridge, UK Posts: 31 Thanks: 3 Thanked 27 Times in 14 Posts	I just looked up EER, SEER - as a UK person these terms have been on the edge of my consciousness for some time! We get COP and SCOP here. So: COP (Coefficient Of Performance) is Power out / Power used. Used for heating or cooling, same units used, so is just a ratio, needs conditions (Tin, Tout stating, usually in degC). COP heating is generally COP cooling+1, if the conditions are similar - heating or cooling is often unstated, and causes confusion. For a compressor it will generally be cooling stated as this is the thermal power moved by the fluid. SCOP (Seasonal COP) tries to use appropriate conditions for your region, and needs Tout stating. I've only seen it used for heating, but I'm in the UK:-) EER is COP but in (Btu/h)/kW and cooling specific. SEER is Seasonal EER. Suprisingly I found a simple EER to SEER link in a webpage - surely this is just an empirical formula that works sometimes in some places with some heatpumps?: EER = 1.12 * SEER - 0.02 * SEER^2 https://power-calculation.com/EER_SE...nditioning.php