FREVAR, Norway

In the beginning of 2016 Hybrid Energy commissioned a two stage hybrid heat pump at FREVAR waste water treatment plant in Fredrikstad, Norway. The heat pump system recovers heat from the biogas upgrading plant and treated waste water. The heat is delivered to the plants central heating system, where it is used for preheating of sludge being fed to the biogas rot tanks, heating buildings and other processes.

The Hybrid Heat Pump was designed to deliver water at 203 °F (95°C), but has delivered 230°F (110°C) without strain during testing.