The heating capacity and COP of CO2 heat pumps can decrease more then 25% during defrost, but optimal defrost can lower this to less than 10%, says Fenagy.
The deal is the largest order to date for the young company, launched in the summer of 2020.
The 300kW unit uses cold gas defrost and an expander instead of an ejector.
The selection of PowerCO2OL units from Carrier signals “increased acceptance of CO2 for large-capacity applications,” the OEM said.
Vestervig Fjernvarme’s 1.2MW heat pump, to be delivered by Danish CO2 specialist Fenagy, will replace oil and wood-chip boilers.
Four buildings in Seward will be heated, with lessons drawn from nearby aquarium.