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TWO-PHASE CRITICAL FLOW RATES OF REFRIGERANTS: THERMODYNAMIC LIMITS OF FLOW RATES IN TUBES AND ORIFICES.

Author(s) : OBERMEIER E.

Type of article: Article, IJR article

Summary

THE EQUATIONS ARE DERIVED BY CONSIDERING THE FLOW RATE OF TRULY EXTENSIVE PROPERTIES SUCH AS ENERGY, ENTROPY, MOMENTUM, MASS AND AMOUNT OF SUBSTANCE. THE APPLICATION OF THIS CONCEPT RESULTS IN GENERAL RELATIONSHIPS FOR THE CRITICAL FLOW RATES. THE EQUATIONS ARE APPLIED TO EQUILIBRIUM FLOW WITH DIFFERENT VELOCITIES OF THE VAPOUR AND LIQUID. THE LIMITING CASE OF ZERO PRODUCTION OF ENTROPY IS INVESTIGATED. FOR A GIVEN THERMODYNAMIC STATE, NOT ONE, BUT A RANGE OF CRITICAL FLOW RATES EXISTS. IT IS SHOWN THAT DEVELOPING SLIP YIELDS SUBSTANTIALLY HIGHER FLOW RATES FOR SHORT TUBES AS COMPARED WITH FLOW RATES IN LONG TUBES.

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Pages: 301-308

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Details

  • Original title: TWO-PHASE CRITICAL FLOW RATES OF REFRIGERANTS: THERMODYNAMIC LIMITS OF FLOW RATES IN TUBES AND ORIFICES.
  • Record ID : 1991-0550
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 13 - n. 5
  • Publication date: 1990/09

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