Heat Pump COP explained

Hello everyone and welcome to the new episode of the HVAC Education Hub Channel. In this episode, we'll cover what is COP, what is the efficiency of heat pumps and what are the main variables to calculate it.

COP means coefficient of performance in a heat pump or refrigerant system. It is a ratio of heating provided (heating delivered to our system) by work or energy required (electricity used to produce this heating). This electricity is mainly from the compressor, as the compressor is the heart of the refrigerant system. There are also some other parts like pumps, fan motors, and sensors, but this is very low consumption, so we will focus only on the compressor side.

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very clear. So, I am looking at Panasonic WH-MDC07J3E5, which is 7kW. My radiator size might need 55C on coldest day (-7C) and catalogue says SCOP is 1.86 at that condition. Is this SCOP based on 55C through whole heating season and therefore the real SCOP will be much better as on warmer days the heat pump can deliver at lower flow temperature, such as 35C.