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Highly efficient ammonia heat-pump system for industrial process water using the ISEC concept. 1.

Number: pap. ID48

Author(s) : ROTHUIZEN E. D., MADSEN C., ELMEGAARD B., et al.

Summary

The purpose of the Isolated System Energy Charging (ISEC) is to provide a high-efficient ammonia heat pump system for hot water production. The ISEC concept uses two storage tanks for the water, one discharged and one charged. The charged tank is used for the industrial process while the discharged tank, is charging. Charging is done by circulating the water in the tank through the condenser several times and thereby gradually heats the water. This result in a lower condensing temperature than if the water was heated in one step. A dynamic model of the system, implemented in Dymola, is used to investigate the performance of the ISEC system. The ISEC concept approaches the efficiency of a number of heat pumps in series and the COP of the system may reach 6.8, which is up to 25 % higher than a conventional heat pump heating water in one step.

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Pages: 8 p.

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Details

  • Original title: Highly efficient ammonia heat-pump system for industrial process water using the ISEC concept. 1.
  • Record ID : 30013168
  • Languages: English
  • Source: 11th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2014). Proceedings. Hangzhou, China, August 31-September 2, 2014.
  • Publication date: 2014/08/02

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