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IIR document

Industrial-sized, high-temperature heat pumps: technologies and application.

Number: pap. n. 309

Author(s) : REINHOLDT L., MARKUSSEN M., PETERSEN T. F., et al.

Summary

In order to provide cooling at temperatures below ambient, the electrically driven vapour compression technologies are nearly 100% dominant and are a “need to have”. In contrast, the same technologies for heat production are a “nice to have” as a variety of heating technologies, based on burning fuels exists, have been proven in operation, competitive in installation cost and well integrated into the heating system they serve. Heat pumps for residential heating have proven to be very energy efficient but until recently compressor technologies have not been available at prices making the technology competitive at capacities and reachable temperature levels interesting for the industry. Now more industrial-sized compressors for higher pressures are being introduced into the market, making the implementation of industrial-sized high-temperature heat pumps possible. In the industry, a huge amount of energy is wasted to the environment as low grade heat. The temperature level is too low for utilization directly, but it is a superb heat source for heat pumps in order to upgrade the energy to useful temperature levels. A number of barriers exist to the introduction of heat pumps in industrial process systems some also being non-technical. The following reports on work done to break down some of them, focusing on heat pump systems larger than 500 kW with outlet temperatures higher than 85°C and up to 250°C. Only natural refrigerants are included in the work. Special attention is given to the not so well known hybrid compression/absorption process.

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Pages: 8 p.

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Details

  • Original title: Industrial-sized, high-temperature heat pumps: technologies and application.
  • Record ID : 30004688
  • 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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