Influence of variable heat load on the refrigerant distribution of a dual cold-plate system

Kai Shing Yang*, Kun Huang Yu, Chung Che Liu, Chi-Chuan Wang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This study examines the refrigerant distribution of a dual cold plate system subject to the influence of heating load using a R-134a based vapor compression system with a nominal capacity ranging from 50-250 W. The cold plate is of identical configuration. Initially, test is performed under an equal heating load for each cold plate (70 W) which then gives rise to a uniform distribution and equal outlet superheat condition. For an unequal heating load, it is found that the distribution of mass flowrate subject to the influence of heating load is strongly related to the outlet states of the two cold plates. For the condition where one of the cold plate is in superheated state while the other is in saturated state, the mass flowrate for the fixed heating load is lower than that of smaller heating load, and the difference increases when the heating load gets smaller due to the influence of accelerational pressure drop. A maximum of 17% difference is seen at a loading ratio of 0.571 (40W/70W). For the condition where both outlet states of cold plate are at superheated states, the mass flowrate for the fixed heating load is marginally higher than that of the smaller heating load, and the difference is insensitive to the rise of heating load. For this situation, the effect of accelerational pressure is negligible, and it is mainly attributed to two-phase/single-phase distribution pertaining to the effect of heating load.

Original languageEnglish
Title of host publicationProceedings of the 6th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2008
Pages1431-1435
Number of pages5
EditionPART B
DOIs
StatePublished - 1 Dec 2008
Event6th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2008 - Darmstadt, Germany
Duration: 23 Jun 200825 Jun 2008

Publication series

NameProceedings of the 6th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2008
NumberPART B

Conference

Conference6th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2008
CountryGermany
CityDarmstadt
Period23/06/0825/06/08

Keywords

  • Cold plate
  • Electronic cooling
  • Refrigerant distribution
  • Variable heating load

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  • Cite this

    Yang, K. S., Yu, K. H., Liu, C. C., & Wang, C-C. (2008). Influence of variable heat load on the refrigerant distribution of a dual cold-plate system. In Proceedings of the 6th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2008 (PART B ed., pp. 1431-1435). (Proceedings of the 6th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2008; No. PART B). https://doi.org/10.1115/ICNMM2008-62348