BY THE OPTIMIST DAILY EDITORIAL TEAM
Helsinki, Finland’s capital, is on track to finish building the world’s largest air-to-water heat pump, which will heat 30,000 households while drastically lowering carbon emissions. This gigantic heat pump, which will create 200 GWh of electricity each year, will help Helsinki achieve its aim of becoming carbon neutral by 2030, a critical step in combating climate change.
According to Helen Oy, the Finnish energy business behind the project, this heat pump is a critical component in transferring the city’s heating system to a more sustainable alternative. “Helsinki has set the ambitious goal to become carbon neutral by 2030, and transitioning our heating system is crucial to achieving this,” said Juhani Aaltonen, VP of Green Investments at Helen Oy.
A major improvement in district heating
District heating, a technique that distributes heat to several buildings via a network of subsurface pipes, is popular in cities such as Helsinki due to its efficiency. Traditionally, this system was fueled by fossil fuels, but the Finnish capital is now using renewable energy to power its heating network.
According to an International Energy Agency assessment, biomass currently accounts for around 50 percent of Finland’s heating energy needs. As part of its green transition, Helsinki’s new heat pump will significantly reduce the city’s reliance on fossil fuels.
How does the world’s largest heat pump work?
Heat pumps, unlike seasonal furnaces or air conditioners, function efficiently throughout the year and in a variety of conditions. They transmit heat from cooler to warmer spaces, making them extremely energy efficient. The new Helsinki heat pump will be able to operate at harsh temperatures, as low as -4°F (-20°C).
Most heat pumps employ environmentally hazardous gasses, however, this facility’s refrigerant will be carbon dioxide (CO2). CO2 has the benefit of providing heat up to 194°F (90°C) while remaining functional in frigid temperatures. “Urban district heating projects that utilize climate-neutral technologies are essential for advancing global efforts to reduce carbon emissions,” explained Uwe Lauber, CEO of MAN Energy Solutions, the company that manufactures the heat pump.
The heat pump’s capacity ranges from 20 to 33 MW, depending on air temperature, making it the largest of its kind. The system’s oil-free motor compressor makes traditional oil or gas-seal systems unnecessary, enhancing its environmental credentials.
Green energy to meet Helsinki’s heating needs
The electricity required to run this gigantic heat pump will come from renewable sources such as wind and solar energy. By moving from fossil fuels to green electricity, the heat pump will help Helsinki get closer to its carbon-neutral target. The system is estimated to save approximately 26,000 tonnes of CO2 every year, comparable to the emissions from thousands of cars.
The heat pump capacity, when paired with 50 MW boilers, will heat 30,000 homes in Helsinki. In addition to lowering carbon emissions, this method will provide pricing stability to customers by easily adjusting production based on demand.
Making the way for a greener future
The new heat pump should be operational by the winter of 2026-2027. Its breakthrough technology is part of a global drive toward climate-neutral heating solutions. “We are excited to see our heat pump solution play a key role in driving the energy transition forward,” says Lauber.
By using this technology, Helsinki not only ensures a cleaner future for its citizens but also sets a good example for other cities striving to minimize their impact on the planet.
