An Air Resource heat pump will commonly generate about 3kW thermal power for each 1kW of electric energy utilized, giving a productive “efficiency” of 300%. It is thermodynamically impossible to have a performance of more than 100%, as this indicates that more energy is being generated than is being put in. Consequently, the performance is revealed as a Coefficient of Performance as opposed to a performance. The factor that it appears that more energy is being created than is utilized is because the only “important” energy input is electrical power utilized to drive the compressor as well as flowing pumps. The remainder of the energy just moved from a warmth resource that would otherwise not be utilized, such as the ambient ground, air, or water, so is not considered as an energy input.

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Although the expression coefficient of Efficiency is always used, it is vital to recognize the distinctions because the heat pump is going to work successfully, as well as can contrast different versions that might be utilizing different steps.

  • Seasonal Coefficient of Performance. Used generally with ASHPs to provide a measure of heat pump efficiency for many years, gauging differing air temperatures.
  • Seasonal Energy Efficiency Ratio or SEER. Utilized primarily with ASHPs to provide a measure of heat pump cooling efficiency throughout the years, gauging varying air temperature levels. There are three climatic areas defined.
  • Energy Efficient Rating or EER. This is a measure of the ratio of provided thermal power to total electric power. This consists of ancillaries such as any type of pumps, fans, and controls.
  • Seasonal Efficiency Factor or SPF. This is the most beneficial meaning, as it gives a step of the ratio of provided thermal energy for many years, to total electrical usage.

But, just like other types of “renewable” power, where the resource of gas is essentially limitless as well as complimentary, it is the overall expense of generation instead of the effectiveness that matters.

For comparison, various types of warmth generation have the following performances:

  • Condensing oil/gas central heating boiler: 90 to 96% performance
  • Standard oil/gas central heating boiler: 70 to 80% efficiency
  • Direct electric home heating: 35 to 45% effectiveness, including losses in generation as well as distribution.

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