How Do You Convert HSFP to COP?

You can describe the efficiency of an air conditioner or heat pump like this one in terms of its HSPF.
••• Jupiterimages/Photos.com/Getty Images

Heating seasonal performance factor (HSPF) and coefficient of performance (COP) are both ways you can measure the efficiency of a heat pump. HSPF compares the output in British thermal units or BTU to the input in watt-hours. You can find the COP, by contrast, by dividing the amount of heat extracted from the cold reservoir by the amount of work it took to transport this heat. Since both numerator and denominator are in joules, COP is unitless. You can change the units to convert from HSPF to COP.

    Write down the HSPF for your heat pump. For example, 8 BTU/watt-hour.

    Multiply the value for your heat pump by 1055.1 joules/BTU. In the example, 8 x 1055.1 = 8440.8 joules/watt-hour.

    Divide the result by 3600 joules/watt-hour. In the example, 8440.8/3600 = 2.34. This is your COP. Note that it is unitless and represents a seasonally averaged coefficient of performance, so you should bear both factors in mind when working with this number.

Related Articles

How to Calculate BTU for Heat
How to Convert CMH to BTU
How to Convert GPM to Cooling Rate in Tons
How to Calculate Heat Loss During Pipeline Depressurization
Does Kinetic Energy Increase in a Drink When Ice Melts?
How to Calculate Heat of Sublimation
How to Convert Nanograms to Milligrams
How to Convert Therms to KWH
How to Calculate a Final Temperature
How to Calculate Joules of Heat
How to Convert KBTU to BTU
How to Convert Joules to Kelvin
How to Calculate Refrigerant Amounts
How to Calculate the Amount of Heat Transferred
What Is the Unit for Enthalpy?
How to Solve for Final Temperature in a Calorimeter
How to Convert BTU to KW