ENGINEERING – THERMODYNAMIC & HVAC CALCULATOR
Heat Pump Cop
A precise tool.
What is the Heat Pump Cop & How does it work?
A heat pump moves thermal energy from a low‑temperature source (e.g., outdoor air, ground water) to a higher‑temperature sink (e.g., indoor space) by consuming mechanical work, usually electricity.
The performance of a heat pump is expressed by its Coefficient of Performance (COP), which is the ratio of useful heating delivered to the electrical work supplied. A higher COP means more heat is moved per unit of electricity.
COP depends primarily on the absolute temperatures of the source and sink. As the temperature lift (difference between sink and source) increases, the COP drops, which is why heat pumps are most efficient in mild climates.
\text{COP} = \frac{T_{\text{sink}}+273.15}{(T_{\text{sink}}+273.15)-(T_{\text{source}}+273.15)}
COP = coefficient of performance
Parameters
Result
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Frequently Asked Questions
What is COP in a heat pump?
COP stands for Coefficient of Performance, which measures how efficiently a heat pump transfers heat by comparing the useful heat output to the electrical energy input.
How does temperature affect a heat pump’s COP?
A higher COP is achieved when there is a larger difference between the source and sink temperatures. Lower outdoor temperatures typically reduce COP.
Can I use this calculator for air conditioning too?
Yes, the COP concept applies to both heating and cooling systems. For AC, it measures the efficiency of moving heat from indoors to outdoors.
What is a good COP value for a heat pump?
A COP of 3 or higher is generally considered efficient for residential heat pumps. Higher values indicate better performance.
How does the size of the heat pump affect its COP?
Properly sized heat pumps operate more efficiently, leading to a higher COP. Oversized units can reduce efficiency and increase COP variability.
Does the type of refrigerant used impact COP?
Yes, different refrigerants have varying efficiencies, which can affect the overall COP of a heat pump system.
Can I use this calculator to compare different heat pumps?
Yes, by inputting different temperatures and sizes for various heat pumps, you can compare their COP values to determine efficiency differences.
Results are for informational purposes only and do not constitute professional advice.