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Fine temperature control with refrigeration systems.

Author(s) : GOULD E. J., JAMES R. W.

Type of article: Periodical article

Summary

A vapour-compression refrigeration system contains many transients which affect fine temperature control. The authors examined the transients with the aim of producing a temperature of cooled medium within more or less 0.02 K. Established systems for fine control cope with capacity variations by using suction throttling or hot gas injection and condenser fan speed control to avoid step control methods. Such a multitude of control loops, together with a thermostatic expansion valve and reciprocating compressor result in interactive oscillations. The control loops were analysed and eventually reduced. A simple system using inverter speed control of the compressor and a constant pressure expansion valve reduced the set point accuracy to 0.03 K. D.W.H.

Details

  • Original title: Fine temperature control with refrigeration systems.
  • Record ID : 1996-0133
  • Languages: English
  • Source: Inst. Refrig., Adv. Proof - 6 p.; 6 fig.; append.
  • Publication date: 1995/03/08
  • Document available for consultation in the library of the IIR headquarters only.

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