As Switzerland's contribution to IEA HPT Annex 62, the Energy Systems Group from the University of Geneva has compiled various case studies, formatted as fact sheets, for inclusion in the IEA HPT Annex 62 case study database.
These energy monitoring and experience feedback studies were carried out between 2016 and 2023 on Heat Pump Systems in multi-family residential buildings in Geneva.
The case studies concern multi-family buildings of various construction periods (from 1972 to 2020) and of varying thermal insulation quality (non-insulated to very well-insulated buildings):
- Existing buildings (non-renovated): St. Julien (CH005), Daru (CH006) & Laurana (CH011)
- Renovated buildings: La Cigale (CH009)
- New buildings: La Fontenette (CH010), Les Vergers (CH012), SolarCity (CH013), Soubeyran (CH014) & Versoix-Centre (CH015)
Case studies:
- CH001 – Bern – Solar renovation: Three connected buildings from 1963 were renovated in 2013. The workers improved the insulation, canged the windows and added two heat pumps. The solar panels on the roof are able to provide 148% of the required energy for the 18 households.
- CH002 – Uster – First MINERGIE-A®-building with office use: The first MINERGIE-A® building with office use has been monitored for two years from May 2014 – April 2016. The all-electric building is equipped with a 33.1 kW ground-source heat pump (B0/W35) a 24 kWp solar PV-system and a 7.1 m2 PV/T-collector for domestic hot water (DHW) preheating. Moreover, a mechanical ventilation sys¬tem with 80% heat recovery is installed. The ground-source is used for free-cooling in summer operation.
- CH003 – Zurich – Concrete building revamp: In Zurich, three heat pumps were built on top of an living unit from 1982 in 2016. The whole construction was also completely revamped by adding new floors, windows, insulation, solar panels and air conditioning. (more)
- CH004 – Horgen – Allmendholz: The multi-family house has four apartments and is equipped with a geothermal heat pump with two bore- holes of 225 m each for space heating and DHW production.
- CH005 – Geneva – St. Julien: The project in St. Julien, Geneva concerns the replacement of an existing oil heating system by a HP only solution in a multifamily building. With the goal of having the total heat production from HP origin, two air/water heat pumps were implemented on the rooftop. One of the previous fuel oil boilers was kept for back up. (more)
- CH006 – Geneva – Daru: The project in Daru, Geneva concerns the replacement of an existing gas heating system by a hybrid heat pump & gas solution in an existing multifamily building. With the goal of having the maximum annual heat production from HP origin, six air/water heat pumps were implemented on the rooftop. (more)
- CH007 – Zurich – Bivalent Heat Pumps: Another older example from Zurich is a multi-family housing scheme, which was built in 1928 and modernized in 2001. The new heat pump is able to provide all required hot water at least in the summer months. (more)
- CH008 – Bern – Remote heat pump: In Bern, an old oil heater was replaced by a new heat pump. Although the heat pump is not directly located at the building, it is still possible to transport the heat into the apartments by a pipe system.
- CH009 – Geneva – La Cigale: A solar assisted Heat Pump with ice storage ensuring 92% of the heat production for a 19.000m² extensively retrofitted multifamily building complex, in combination with back-up gas boiler. (more)
- CH010 – Geneva – La Fontenette: A centralized wastewater Heat Pump with a complementary gas boiler, for a high performance multifamily buildings complex, with heat distribution via a dedicated district heating system. (more)
- CH011 – Geneva – Laurana: Renovation of a District Heating heat production plant combining gas boilers with a Heat Pump for flue gas heat recovery and geothermal heat production via a borehole field. (more)
- CH012 – Geneva – Les Vergers: An eco-district including 33 high performance buildings heated by a 5 MWth HP on shallow groundwater. (more)
- CH013 – Geneva – SolarCity: Solar assisted HP in combination with unglazed solar collectors for a new multifamily building complex in Geneva, Switzerland. (more)
- CH014 – Geneva – Soubeyran: Heat Pumps on exhaust air for Space Heating and Domestic Hot Water in a very high performance multifamily building. (more)
- CH015 – Geneva – Versoix-Centre: A four-pipe District Heating and Cooling network with a 400kWth Heat Pump on lake water, for a mixed-use building complex. (more)
Download:
Contact person for further information:
- Omar Montero Dominguez, PhD Assistant, Groupe Systèmes Energétiques, Institut des sciences de l’environnement (ISE), Université de Genève, omar.MonteroDominguez@unige.ch
