Västerås, Sweden

District cooling with treated wastewater

In Västerås, a BROAD absorption chiller produces the chilled water for the city's district cooling network. It runs on hot water from the district heating network, partly generated by waste incineration, which makes better use of this heat in summer.

Low-temperature treated effluent from the wastewater treatment plant is used as cooling water and ensures high chiller performance.

• Unit type: single-effect hot water absorption chiller × 1 unit
• Cooling capacity: 7.5 MW
• Heat source: district heating hot water (inlet 80 °C, outlet 65 °C)
• Cooling water: treated wastewater (inlet 20 °C, outlet 32 °C)
• Chilled water: supply 6 °C, return 12.5 °C
• Use: district cooling
• Equipment: automatic tube cleaning system, without stopping the chiller