European – Air-source heat pump examples-news-99

European – Air-source heat pump

Building and design values

Heating and cooling (NTH4)

Application:Space heating, DHWHeat pump type(s):Air-to-water (space heating), separate air-to-water heat pump water heater (DHW)Heat pump installed capacity (kW)Heating:4.6
A-7/W351DHW:1.0
A20/W50Refrigerant:R290 and R134a (DHW)Heat sourceOutdoor air (space heating), exhaust air (DHW) from two bathrooms, toilet, kitchen, laundry roomDetails:Circulation pump 35 W (heat distribution)Distribution system(s):Floor heating elements/water without thermostatic valvesSupply and return temperature (ºC)Heating:35/30²Cooling:–Auxiliary system:NoneHeat pump design:Heating demand of the house (20ºC, air change rate=0.3/h) according to a SIA³ model was calculated as 181 MJ/m2a. The actual amount used was higher at 242 MJ/m2a (23ºC) because of higher effective averag e room temperature, higher air change rate etc. DHW (57 l/person/day, 50ºC) 12 months a year, space heating in winter period. The return temperature control is dependent on outdoor temperature. Utility restrictions do not allow heat pump operation at 2-4, 10-12 and 17-19 o