Imagine you could heat your home with clean, recycled energy. That’s exactly what Hammarbyverket has been doing for decades. Hammarbyverket is a remarkable facility in Stockholm, Sweden, that harnesses the power of purified wastewater to provide heating and cooling for the city. It started operating in 1986 and today is considered the world’s largest heat pump facility. The seven heat pumps at the Hammarbyverket extract energy from the wastewater, which comes from the Henriksdal wastewater treatment plant. The process works by using heat pumps to transfer the energy from the warm wastewater to a closed-loop system. The extracted energy is then used to produce hot water, which is distributed through the city’s district heating network, keeping homes and businesses warm in the coldest of winters. In the summer, the system can also be reversed to create cold water, which is used for cooling. This innovative solution saves energy, reduces emissions, and provides a sustainable source of power for Stockholm. Stepping inside the Hammarbyverket, you might be amazed at the sheer scale of the facility. The roar of the heat pumps is a constant reminder of the powerful energy being harnessed. But more than just a technical marvel, the Hammarbyverket is a testament to Stockholm’s commitment to sustainability.
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Step through the grand wooden doors of the Central House of the Workers of Art, and you’ll be transported to