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A mass flow rate correlation for refrigerants and refrigerant mixtures flowing through short tubes.

Author(s) : PAYNE V., O'NEAL D. L.

Type of article: Article

Summary

A correlation was developed to predict the mass flow rate of R12, R134a, R502, R22, R407C, and R410A through short tubes. Short tube lengths ranged from 9.5 to 25.4 mm, and sharp edged diameters ranged from 1.09 to 1.94 mm. The correlation covered both single-phase and two-phase entrance conditions under approximately choked flow. The correlation consists of nondimensional parameters that are a function of upstream conditions, downstream conditions, short tube geometry, and critical point pressure/temperature. The correlated data were drawn from previous work and work performed during this investigation. The general form of the correlation was a function for single-phase flow multiplied by a function incorporating parameters for two-phase flow. Over 1200 data points were used to produce the correlation.

Details

  • Original title: A mass flow rate correlation for refrigerants and refrigerant mixtures flowing through short tubes.
  • Record ID : 2004-1050
  • Languages: English
  • Source: HVAC&R Research - vol. 10 - n. 1
  • Publication date: 2004/01
  • Document available for consultation in the library of the IIR headquarters only.

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