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Ammonia heat pump for wastewater

Aalborg CSP will connect a 2.5 MW ammonia heat pump to an area heat operated by E.ON Denmark. The facility will undoubtedly be located at an area wastewater treatment plant.

Aalborg CSP has revealed plans to set up a large-scale heat pump for wastewater to optimize a green district heat operated by E.ON Denmark, a unit of German energy company E.ON, in Frederikssund, Denmark.

The order for E.ON Denmark includes turnkey contract for a heat pump with associated exchanger, piping and purification system, which is extracting the power from the treated wastewater before it really is subsequently discharged in to the local environment at Roskilde Fjord, Aalborg CSP said in a statement. Heat pump itself, which applies the natural refrigerant ammonia (to be completely renewable and nontoxic), could have a maximum output of approx. 2,500 kW.

The Danish renewable energy company said heat pump will undoubtedly be create at an area wastewater treatment plant. It claimed that it has a higher coefficient of performance (COP), with the wastewater temperature varying over summer and winter.

On the main one hand, it really is positive for the aquatic environment that the outlet temperature of the treated wastewater is decreased and is hence nearer to the temperature of the aquatic environment where it really is discharged, it explained. Likewise, it really is positive for district heating consumers, because the relatively temperature of wastewater ensures a far more stable and sustainable energy supply.

The ammonia heat pump has two stage compressors, with a life cycle of 25 years.

The answer is furthermore designed flexibly in a way that allows for changes in heat source, thereby giving certainty to the bankability of the long-term investment. A possible switch of heat source makes it possible for the plant to make use of the outdoor air being an power source if the procedure plant were to be closed down regarding the potential future changes in the wastewater plan, the business said.

Aalborg CSP also develops thermal energy storage, CSP projects, integrated energy systems, and solar district heating.

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