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Improvement of natural gas spark-ignition engine for refrigeration compressor applications.

Author(s) : WATTANAVICHIEN K., CHARTERS W. W. S., WATSON H. C., MILKINS E. E.

Type of article: Article

Summary

The authors believe that there is a good future for natural gas fueled engine drive for heat pump refrigerant compressors. The paper describes the analysis and results of improvements to a standard 3.9 litre reciprocating engine to increase its efficiency for variable speed compressor drive. These focused on lean-burn fuel mixtures, increased compression ratio, fast burning of fuel and optimization of valve timing for different speeds. Mathematically modelling enables a comparison to be made with an existing natural gas engine driven heat pump installed at a swimming pool. Efficiency was further improved by using the engine waste heat. It was estimated that mean thermal efficiency could be improved from the existing 25.5% to 38.5%. D.W.H.

Details

  • Original title: Improvement of natural gas spark-ignition engine for refrigeration compressor applications.
  • Record ID : 1993-2606
  • Languages: English
  • Source: AIRAH J. - vol. 47 - n. 1
  • Publication date: 1993/01
  • Document available for consultation in the library of the IIR headquarters only.

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