The old heating installation and the new heat pump building
Image: Hamburger Energwerke
The German energy supplier Hamburger Energwerke is planning to build a large-scale heat pump system at the location of the Heating Installation of Bergedorf-West in Hamburg.
The air source heat pump has a thermal output of 4 MW and will connect to the local heating network.
The system is installed in a new building next to the current heating factory, with air coolers placed on the roofs of newly built garages to save space.
The pump extracts heat from ambient air with the help of the coolers, even at low temperatures. A fan pulls in air and sends it to an evaporator, where a liquid coolant circulates. The coolant absorbs heat and turns into a gas.
The gas is then compressed by an electricity -driven compressor, which increases the temperature. The heated coolant transfers the heat to a condenser and the heating circuit. It then cools, becomes liquid again and goes through an expansion valve, so that the cycle is restarted.
According to the company, the heat pump can generate up to 3.2 kWh of heat from 1 kWh of electricity. During peak consumption on especially cold days, or when the heat pump is offline, gas boilers will supplement the heat supply.
Construction is expected to start in the fall of 2025.
“An extensive soundproofing concept will reduce noise emissions compared to the previous operation of the heating installation,” the company said, without providing further details. “Bergedorf-West is a good example of how we can also make existing decentralized networks climate-friendly-with large-scale heat pumps such as the key to the heat transition.”
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