{"id":819,"date":"2021-05-24T18:13:59","date_gmt":"2021-05-24T18:13:59","guid":{"rendered":"https:\/\/heatpumpingtechnologies.org\/annex62\/?page_id=819"},"modified":"2025-08-25T06:23:59","modified_gmt":"2025-08-25T06:23:59","slug":"karlsruhe-durlach-ersinger-strase-4-heaven","status":"publish","type":"case_studies","link":"https:\/\/heatpumpingtechnologies.org\/project62\/case-studies\/karlsruhe-durlach-ersinger-strase-4-heaven\/","title":{"rendered":"Karlsruhe-Durlach, Ersinger Stra\u00dfe 4 \u00abHEAVEN\u00bb"},"content":{"rendered":"
The demonstrated heat pump system is developed within \u00abHEAVEN\u00bb project of Fa. Viessmann and Fraunhofer ISE: the innovative heat source hydraulics utilize the synergies of air (availability, costs) and ground sources (performance) and allow regeneration and defrosting by intelligent control.<\/p>\n

\"\"<\/p>\n

The building was originally built in 1963 and renovated in 1995. The building features a heated floor area of 2112 m\u00b2 on 5 floors with a total of 30 apartments. The building was renovated exchanging the windows with insulating glazing (Uwin = 1.7 W\/m\u00b2K), and adding layers of thermal insulation (styrofoam, d = 60 mm, l = 0.035 W\/mK) to the fa\u00e7ade, cellar and to ceiling, thus reducing the overall U-value of the opaque envelope from Uenvelope = 1.71 W\/m\u00b2K to\u00a0 0.323 W\/m\u00b2K.<\/p>\n

\"\"<\/p>\n

Key facts<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Building <\/strong><\/td>\n<\/td>\nHeat pump and source<\/strong><\/td>\n<\/tr>\n
Location<\/td>\nKarlsruhe, Germany
\n<\/em><\/td>\n		<\/td>\nNumber of HP<\/td>\n1<\/em><\/td>\n<\/tr>\n
Construction<\/td>\n1965<\/em><\/td>\n<\/td>\nInstalled power<\/td>\n55.4 kW<\/td>\n<\/tr>\n
Heat distribution<\/td>\nradiator heating<\/em><\/td>\n<\/td>\nOperation mode<\/td>\nbivalent<\/em><\/td>\n<\/tr>\n
Heated area<\/td>\n2112 m\u00b2 living<\/td>\n<\/td>\nHeat source<\/td>\n\u00a0PVT collectors
\n(solar+ambient)<\/em><\/td>\n<\/tr>\n
Level of insulation<\/td>\ngood
\n(renovation in 1995)\u00a0<\/em><\/td>\n		<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Heating system<\/strong><\/td>\n<\/td>\nDomestic hot water <\/strong><\/td>\n<\/tr>\n
Heat demand<\/td>\n60 kW<\/td>\n<\/td>\nType of system<\/td>\ncentral<\/td>\n<\/tr>\n
Heating temperature<\/td>\n55 \/ 45 \u00b0C
\n<\/em><\/td>\n		<\/td>\nMax. temperature<\/td>\n62 \u00b0C<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\nCirculation system<\/td>\nyes<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Description of the technical concept<\/strong><\/p>\n

Heat Pump Technology<\/strong><\/em><\/p>\n