District heating systems are a candidate as a key technology to achieve international climate mitigation goals, both those set by the Paris agreement, and the more stringent goals set by the European Green Deal.
Frascold - leading player in the development, production and marketing of semi-hermetic compressors serving the refrigeration and air conditioning industry - and Solid Energy - a company specialized in heat pumps powered by renewable sources - combine the forces to contribute to the diffusion of district heating and pave the way for ecological transition by signing numerous projects in Denmark.
Among the most recent partnerships, the upgrading of the Galten plant, active since 1964 and capable of powering about 2,130 housing units, stands out. The collaboration between Frascold and Solid Energy for the Galten site kicked off in 2019 with the creation of a system capable of producing 45,000 MWh annually, obtained with 6 Frascold CXH screw compressors, suitable for the use of HC, for 3 , 5 MW in total of power. The subsequent expansion, underway in 2021, provides for the inclusion of 12 additional CXH compressors, for a power increase of 7 MW. The air-to-water heat pumps installed absorb heat from the outside air with 34 air coolers for a total of 3,215,000 m3 / h and allow 98% of the consumption of the district heating system to be covered (i.e. 44,343 MWh), with a SCOP (Seasonal Coefficient of Performance) of 3.11. The system provides a flow temperature of 70°C with a return of 38°C, thus obtaining a COP equal to 3.4 calculated considering an external air temperature of 8°C, which is the annual average in Denmark.