Share

IIR document

A study on the condensation heat transfer coefficient of R1234ze(E) and R134a near the critical point.

Author(s) : JEONG J.

Type of article: IJR article

Summary

Industrial heat pumps have been developed to recycle surplus heat from various industrial processes for steam generation. A condenser in an industrial heat pump needs to meet the high condensation temperature. Alternative refrigerants are also needed for condensers. The objective of this study was to compare condensation heat transfer characteristics of R1234ze(E), an alternative refrigerant at high reduced pressure, and R134a, a conventional refrigerant. A test section of copper tube with a diameter of 1/2 inch and a length of 4 m was used. The test section was installed inside a PVC tube which was cooled with brine. Experimental conditions were: reduced pressure from 0.5 to 0.7 and mass flux of 500–600 kgm-2s-1. Condensation heat transfer coefficients of R1234ze(E) and R134a decreased with an increase in reduced pressure. Effects of mass flux on refrigerants decreased with an increase in reduced pressure. A Travis model showed the best performance for estimating condensation heat transfer coefficients of R1234ze(E) and R134a under high reduced pressure conditions.

Available documents

Format PDF

Pages: 83-94

Available

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: A study on the condensation heat transfer coefficient of R1234ze(E) and R134a near the critical point.
  • Record ID : 30028519
  • Languages: English
  • Subject: Technology, HFCs alternatives
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 128
  • Publication date: 2021/08
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2021.03.018
  • Document available for consultation in the library of the IIR headquarters only.

Links


See other articles in this issue (27)
See the source

Indexing