Energy and Buildings

https://www.sciencedirect.com/journal/energy-and-buildings/vol/289/supp/C Volume 289,15 June 2023[OA](1)Two-stage evaporator for R744 heat pumps using greywater as heat source,by Angel A.Pardinas,Hanne Kauko,Mihir Mouchum Hazarika,et al,Article 113047 Abstract:Heat pumps are pinpointed as a key technology in decarbonizing buildings’heat supply,'which is currently dominated by fossil-fuel based systems.To minimize the environmental impact of heat pumps over their lifetime,selecting natural working fluids(refrigerants)is the only viable long-term choice.Independent of the refrigerant,the efficiency of a heat pump is closely linked to temperature of the applied heat source,and to this end,wastewater is a promising candidate that is abundant in all urban environments.This experimental study investigates a novel two-stage。