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Groundwater system with ammonia heat pumps saves 70% of energy.

Author(s) : WINTHER H., KLOOTWIJK M.

Summary

This paper describes an "aquifer thermal energy storage" with heat pumps for combined cooling and heating for 58.000 m2 of buildings. The system provides 4.1 MW of cooling and 2.9 MW of heating. An Aquifer is an underground layer of water bearing permeable rock or unconsolidated materials from which groundwater can be usefully extracted using water wells. During the summer, the system uses deep level groundwater from "cold" wells to provide cooling to the buildings. The heated groundwater is re-injected into "warm" wells and stored underground. During winter, the cycle is reversed and the water is pumped from the warm well and cooled down by the ammonia heat pumps. The chilled water is stored in the "cold" well to be used the next summer. The heat recovered by the heat pumps is used for the heating systems for the buildings.

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Pages: 2010-2

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Details

  • Original title: Groundwater system with ammonia heat pumps saves 70% of energy.
  • Record ID : 2010-1638
  • Languages: English
  • Source: 9th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2010). Proceedings. Sydney, Australia, April 12-14, 2010.
  • Publication date: 2010/04/12

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