Swiss District Heating – Central Energy Plant: Heat Pump System using R-717 (Ammonia) 2026 Tender
organisation
In context
This is a contract notice published by a government body covering the supply of goods. Bids are invited through an open procedure. Delivery covers Switzerland (CH-SG). It is classified under Heating and Cooling, Renewable Energy and Energy Efficiency and 1 other against the sustainability taxonomy rather than matched on keywords.
A Swiss municipal utility seeks procurement of an ammonia-based (R-717) heat pump system for a district heating energy centre powered by treated wastewater, supplying heat to multiple customer substations. Bidders should be heat pump manufacturers or system integrators with proven experience in large-scale, industrial-grade ammonia heat pump installations and controls integration.
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About this tender
The funder) are planning a district heating network. Treated wastewater from the Flawil–Degersheim–Gossau Wastewater Association (AVFDG) will be used as the heat source for heat generation by means of heat pumps. The new energy centre will be constructed above the existing operations building at the Oberglatt wastewater treatment plant. The district heating network will supply heat to customers substations, where it can be used for space heating and domestic hot water production. …
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