Share

Recommended by the IIR / IIR document

Refrigerant maldistribution in brazed plate heat exchanger evaporators. Part B: Analysis of the influence of maldistribution on the evaporator performance.

Author(s) : NAVARRO-PERIS E., ALVAREZ-PINEIRO L., SCHNABEL L., CORBERÁN J. M.

Type of article: IJR article

Summary

The maldistribution of the refrigerant mass flowrate among the different channels of a brazed plate heat exchanger evaporator with distributor, has been studied with a thermographic camera working under different conditions of inlet vapor quality, superheat, and water temperature drop. Part A of this work includes the description of the experimental campaign and a full discussion of the obtained results. This paper (part B) presents, first an evaluation of the penalty caused by the refrigerant maldistribution on the evaporator performance, and the effect of the operation conditions on that penalty; second, a data reduction methodology, which allows the quantification of the maldistribution based on a series of simple assumptions and the flow conservation equations. Finally, given that it has been found that the water temperature drop across the evaporator has a strong influence on the performance penalty due to refrigerant maldistribution, the water temperature evolution is analyzed in detailed and the reasons for its great influence are explained and commented. On this regard, it is concluded that the penalty of the maldistribution on the evaporation performance strongly depends on the availability of the secondary fluid in the channels where most of the refrigerant liquid is concentrated. The described data reduction methodology, based on the analysis of the thermographies and the measured evaporator performance, is suitable to give an estimate of the maldistribution which seems reasonable and consistent with the observed data.

Available documents

Format PDF

Pages: 312-321

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: Refrigerant maldistribution in brazed plate heat exchanger evaporators. Part B: Analysis of the influence of maldistribution on the evaporator performance.
  • Record ID : 30029138
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 131
  • Publication date: 2021/11
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2021.04.003
  • Document available for consultation in the library of the IIR headquarters only.

Links


See other articles in this issue (95)
See the source

Indexing