Nykøbing Sjælland
- district heating with flexible heat production and large energy storage
The case
In Nykøbing Sjælland, Denmark, four H-1800 air-source CO2 heat pumps enhance the district heating company’s heating system. The heating setup also includes a 10 MW electric boiler, a CHP unit and substantial energy storage in two accumulation tanks, ensuring optimal heat production regardless of the electricity price.
The energy storage holds 9,500 m³ of hot water, providing great flexibility to switch the units on and off in response to electricity price fluctuations, while consistently meeting the heating demands of approximately 2,000 consumers.
The heat pump
The heat pump installation consists of four standard H-1800 AW units and 24 evaporators, positioned in two groups of 12 opposite each other. The four H-1800 heat pumps are the first Fenagy units equipped with the highly efficient 70 m³/h 8-cylinder compressors from Bitzer. The heat pumps can start and stop in about 5 minutes and produce hot water up to 85°C, providing optimal flexibility for planning and operation.
The heat pumps were commissioned in 2023 and fully handed over to the customer after commissioning.
Year:
2023
Model:
3 x H-1800 AW
Application:
Air-to-water heat pump
Capacity:
7.9 MW · 42°C/70°C hot water
(5°C/85% humidity)
COP:
3.0
Defrost method:
Glycol
CUSTOMER SAYS…
"The delivery time and installation of the system were as agreed and on schedule. Service during the period after commissioning and handover has been excellent and trouble-free."T
Thomas Suldrup and Per Friis
Nykøbing Sjælland District Heating