Summary

Esbjerg, Denmark, is using large electric heat pumps to extract heat from the North Sea and supply its district-heating network. During a two-hour winter test, seawater entered the system at 3.3°C and left at 1.2°C. The two heat pumps consumed 19.9 MW of electricity and supplied 55.2 MW of heat at a district-heating water temperature of 90°C. The difference, 35.3 MW, came from the seawater.

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