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Combining the use of thermal storage and indirect evaporative cooling to minimize the installed chiller capacity.

Number: pap. n. 112

Author(s) : NIELSEN G.

Summary

The increasing technical and comfort cooling demand in office buildings leads to high peak demands. A well known method of reducing peak production capacity, that has not penetrated the building industry, is the use of thermal storage. In this paper it will be shown that in a 17 000 m2 office building, located in Oslo, with a nominal comfort cooling demand of 761 kW, the application of indirect evaporative cooling of the ventilation air will reduce the peak demand by approx. 48%. Combining this with a thermal storage capacity of 1320 kWh, will lead to a further reduction in necessary chiller capacity to approx. 181 kW or 24% of the demand. The gains in installed capacity are furthermore enhanced by the fact that the optimum heat pump capacity for a building this size, as stated by Gert Nielsen (2008) is approx. 175 kW, slightly dependent on the design conditions of the heating system. This makes the combined use of the chiller, or dual purpose heat pump even more attractive, as the machinery for cooling is very much the same size as for a heat pump application.

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Pages: 8 p.

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Details

  • Original title: Combining the use of thermal storage and indirect evaporative cooling to minimize the installed chiller capacity.
  • Record ID : 30004255
  • Languages: English
  • Source: 10th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2012). Proceedings. Delft, The Netherlands, June 25-27, 2012.
  • Publication date: 2012/06/25

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