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CONTROL WITH A THERMOSTATIC EXPANSION VALVE.

Author(s) : BROERSEN P. M. T.

Type of article: Article, IJR article

Summary

INVESTIGATIONS OF THE STABILITY OF REFRIGERATION SYSTEMS ARE USUALLY BASED ON A DESCRIPTION OF A THERMOSTATIC EXPANSION VALVE AS A PROPORTIONAL SUPERHEAT CONTROLLER. THE CONTROLLED LIQUID FLOW IS PROPORTIONAL TO THE PRESSURE DIFFERENCE ON THE DIAPHRAGM IN THE VALVE. HOWEVER, THIS PRESSURE DIFFERENCE IS RELATED TO A SIGNAL OBTAINED BY CONSIDERING SEPARATELY TWO TEMPERATURES WHOSE DIFFERENCE IS THE SUPERHEAT, AND THE TRANSFER FUNCTION OF THE TEMPERATURE SENSING BULB ACTS ONLY ON ONE OF THE TWO COMPONENTS. THIS PAPER TREATS THE DYNAMICS AND PRESENTS A METHOD TO SIMPLIFY THE MULTIVARIABLE CONTROL PROBLEM.

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Format PDF

Pages: 209-212

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Details

  • Original title: CONTROL WITH A THERMOSTATIC EXPANSION VALVE.
  • Record ID : 1983-1303
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 5 - n. 4
  • Publication date: 1982

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