L R AS Published on Saturday 16 September 2023 - n° 457 - Categories:heat pump
Heat pumps are more efficient than conventional heating systems
A review of seven heat pump field studies from around the world revealed that "air-source units have an average coefficient of performance (COP) of 2.74 when temperatures are above -10°C. Below that,
the COP is between 1.5 and 2. So, well below 0°C, heat pumps are still significantly more efficient than fossil fuel and electric resistance heating systems at appliance level."
In the north-east of the US, the study found that 32 out of 42 owners of a cold climate heat pump said they were "very satisfied' with their heat pump over the past year, 3 'satisfied' and 7 'somewhat satisfied'.
"In Europe, for the 670 responses received, user comfort improved in 81% of cases and decreased in only 1%. Heat pumps can be successfully installed when minimum temperatures are above -10°C, without worrying about their performance or the need for back-up heating capacity. "
The study indicates that ground-source heat pumps are a highly relevant technology for the coldest climates.
PV Magazine, 15 September 2023
NDLR Clearly, the comments on heat pumps are all pointing in the same direction, that of the benefits of this system.
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The Koreans have developed a heat pump optimisation technique that controls the flow rate of the secondary refrigerant. The proposed technology offers the advantage of bypassing the need to control the heat pump compressor, a function that is not generally available in commercial appliances.
PV Magazine of 14 September 2023
