This new 11 MW(th) Air-Water #HeatPump in Vermo, Espoo is the largest of it's kind in #Finland and a first step to 100MW Air-Source HPs on the #Fortum#DistrictHeating network in Espoo, Kauniainen and Kirkkonummi.
It was built last year next to a 160 MW oil-fired peak boiler. This week temperatures plunge below the design temperature -15°C of the #ASHP, so the peak boiler takes over. Luckily only for few days annually, and using bio-oil. #SectorCoupling#Wärmewende
BTW, does somebody know of a bigger #ASHP anywhere? The only multi-MW heat pumps I found are using wastewater or seawater as heat source. A few ground source exist in Finland but I believe at only about 4MW.
@nemobis I have also wondered why Fortum is unwilling to build large ground source heat pumps for #districtHeating. Perhaps they are still experimenting, and air-source HPs are both cheaper to procure and easier to relocate if necessary. #Lippulaiva shopping mall already has 4MW GSHP, so perhaps they consider it to be more potent competition to their district heat and generally oppose such development.
Also, Fortum is not building seasonal heat storage like Helen and Vantaan Energia #VECTES.
@nemobis On the other hand, Fortum does have some bad experience with the failed 6km #DeepHeat borehole in Otaniemi. And they do recover heat from wastewater in Blominmäki and Suomenoja treatment plants, so that source seems exhausted.
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