Heating Replacement for a Family Home – A Simple Route to a Heat Pump
In a typical family-home neighbourhood in Dübendorf, we replace existing oil and gas heating systems with properly sized air-to-water heat pumps and coordinate the entire project.
Cooling with Heat Pumps, Saving Gas in Winter
Ruchstuckstrasse, Brüttiselen
2021
Project Description
The project actually started with cooling
The project began with the need for an effective cooling solution for the offices of a commercial property in Brüttisellen. Together with the client, we developed a concept that does more than simply cool the building. The existing gas boiler system was supplemented with a cascade of two Alpha innoTec NP-AW 20-20 air-to-water heat pumps. The system was deliberately sized around the building's summer cooling demand.
Project Description
A bivalent system for summer and winter
With around 40 kW of cooling capacity, the heat pump cascade can effectively cool the building in summer. This output would not, however, be sufficient to cover the complete heating demand in winter. The existing gas boiler was therefore retained and integrated into the new system using a changeover valve and a defined bivalence point. Whenever the heat pumps can cover the heating demand, they provide part of the building's heat. At higher loads, the gas boiler remains available. Domestic hot water also continues to be produced by the gas boiler. For several years now, the system has provided noticeable cooling in summer while reducing gas consumption in winter.
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A Private District Heating Network for Freudwil
Two Fröling wood-chip boilers with outputs of 150 and 60 kW supply houses and apartment buildings in Freudwil through a private district heating network. We installed the central plant, substations and complete connections for the individual heat consumers.
