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Cogenerative industrial refrigeration: a greenhouse strategy.

Author(s) : MCLEAN K. R.

Type of article: Article

Summary

The need to reduce CO2 emissions is paramount in large scale energy using systems today. The author suggests possibilities for industrial refrigeration plants using ammonia as the refrigerant. The most efficient design for refrigeration capacities up to 1 megawatt uses gas turbine driven screw compressors with waste heat from the turbines producing process hot water. An advantage of direct gas engine or turbine drive is capacity control by speed reduction. An alternative at slightly lower efficiency would be gas powered alternators producing electricity for electric motor drive, with the gas engine waste heat used for water heating. Overall energy conversion efficiencies range from 70 to 77% compared with 46% for electric motor drive from a coal-fired power station grid. Above 1 megawatt capacities, absorption refrigeration is worth investigation if a waste heat source can be made available. An example given uses heat from gas turbines driving generators feeding the local grid. D.W.H.

Details

  • Original title: Cogenerative industrial refrigeration: a greenhouse strategy.
  • Record ID : 1993-1345
  • Languages: English
  • Source: AIRAH J. - vol. 46 - n. 4
  • Publication date: 1992/04
  • Document available for consultation in the library of the IIR headquarters only.

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