STRABAG Umwelttechnik GmbH - STRABAG building 50 MW industrial heat pump in Gothenburg, Sweden

Dresden, 29 April 2024 STRABAG Umwelttechnik GmbH has been commissioned by Göteborg Energi AB, one of Scandinavia’s leading energy suppliers, to handle as a general contractor the turnkey installation of a 50 MW industrial heat pump system to feed heat into Gothenburg’s district heating network. The order which results from an EU-wide tender with negotiated procedure represents a major acquisition success story for the HEAT PUMP ALLIANCE®, an exclusive partnership between STRABAG and Atlas Copco in the field of industrial and high-performance heat pumps agreed in 2022. The heat pump system is scheduled to begin operations in December 2026. The construction works will be carried out by Züblin Scandinavia AB, a Swedish subsidiary of STRABAG. 
The heat pump will be installed in the existing Rya heating plant in Hisingen near Gothenburg. Built in several stages between 1983 and 1985, the plant today has an installed district heating capacity of around 160 MW, distributed across four heat pump modules, and is capable of supplying district heating to up to 15,000 households. The current order involves replacing the two older and smaller Rya VP 1 and Rya VP 2 modules with the new turn key 50 MW heat pump, comprising a turbocompressor from Atlas Copco. The heat source will be wastewater from the neighbouring wastewater treatment plant with a temperature of at least 10°C even in winter. As a result, every megawatt of electricity used for the heat pump supplies more than three and a half megawatts of district heating at 90°C in the winter. 
 
The new heat pump uses a natural refrigerant with a global warming potential of only 3 and an ozone depletion potential of 0, thus with low climate impact according to the German Environment Agency. Taking the EU regulation 2024/573 on fluorinated greenhouse gases into consideration, the HEAT PUMP ALLIANCE® generally avoids using common synthetic refrigerants such as fully and partially fluorinated hydrocarbons in its heat pumps. 
 
HEAT PUMP ALLIANCE® STRABAG – Atlas Copco: STRABAG Umwelttechnik GmbH, through its Dresden-based plant engineering division, and Atlas Copco Energas GmbH of Cologne in 2022 started a cooperation in the area of industrial and high-performance heat pumps. The two companies are working together to pool their respective resources and capacities with the goal of better meeting the challenges and needs of the rapidly growing market for industrial heat pumps. The partnership agreement covers heat pumps with a thermal output of more than 10 MW used to provide heat and steam for industrial use and for feed-in into district heating networks. 
 
Atlas Copco Energas contributes to the partnership its 30+ years of experience providing turbocompressors for this sector, complemented by STRABAG Umwelttechnik’s extensive know-how in plant construction in the fields of energy and environmental technology.With this commitment, the two companies are contributing to a more energy efficient future while reducing fossil fuel dependence.

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