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Prediction of heat transfer coefficients of various refrigerants during evaporation.

Author(s) : JUNG D. S., RADERMACHER R.

Summary

A study of evaporative heat transfer coefficients of new ozone-safe refrigerants is reported. A heat transfer coefficient correlation with a mean deviation of 7.2%, based on the experimental data obtained with R22, R12, R152a, and R114, was used for the prediction. This correlation was further validated by comparing it with more experimental data for R11 and R134a. For the prediction, the evaporator coil is assumed to be a straight tube with an inner diameter and length of 8 millimeters and 7.96 meters, respectively. Heat transfer coefficients of 12 halogenated refrigerants are estimated on the same cooling capacity of 3 and 4 kilowatts which is typical for residential heat pumps. Results are given.

Details

  • Original title: Prediction of heat transfer coefficients of various refrigerants during evaporation.
  • Record ID : 1993-0816
  • Languages: English
  • Publication date: 1991
  • Source: Source: ASHRAE Trans.
    vol. 97; n. 2; 48-53; 7 fig.; 3 tabl.; 14 ref.; discuss.
  • Document available for consultation in the library of the IIR headquarters only.

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