Coefficient of Performance (COP) Formula:
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Definition: This calculator determines the Coefficient of Performance (COP) for heat pumps, which measures their efficiency.
Purpose: It helps HVAC professionals and homeowners evaluate the energy efficiency of heat pump systems.
The calculator uses the formula:
Where:
Explanation: The COP represents how much heat energy is transferred per unit of work input. Higher COP values indicate more efficient systems.
Details: Calculating COP helps compare different heat pump systems, estimate operating costs, and verify system performance.
Tips: Enter the heat output (Q) and work input (W) in Joules. Both values must be > 0. The calculator will output the dimensionless COP value.
Q1: What is a good COP value?
A: Typically, values above 3 are considered efficient for heat pumps. The theoretical maximum COP depends on temperature conditions.
Q2: Can COP be less than 1?
A: For heat pumps, COP should always be greater than 1. Values ≤ 1 would indicate the system is performing worse than direct electrical heating.
Q3: How does COP relate to energy efficiency?
A: Higher COP means better efficiency - more heat energy is delivered per unit of electrical energy consumed.
Q4: What units should I use?
A: Both Q and W should be in the same energy units (Joules in this calculator). You can convert from other units before input.
Q5: How does temperature affect COP?
A: COP decreases as the temperature difference between heat source and sink increases. This calculator provides COP for specific operating conditions.