Share

IIR document

Effects of water mal-distribution on thermostatic-expansion-valve stability and its controlled two-circuit evaporator performance.

Author(s) : HUANG D., ZHAO R., GONG Q. Q., et al.

Type of article: Article, IJR article

Summary

Effects of water mal-distribution on thermostatic-expansion-valve (TEV) stability and its controlled two-circuit evaporator performance were investigated experimentally and numerically. 7 sets of water mal-distribution were obtained with Circuit 2 water percentage (F2) from 36.9% to 9.1%. Results showed that the TEV control-loop was stable with F2 from 36.9% to 27.0%, and the overall evaporator capacity decreased by 3.4%. However, hunting occurred with F2 from 27.0% to 9.1% due to the evaporator outlet superheat smaller than the TEV minimal stable signal (MSS), hence system parameters such as evaporator pressures and temperatures oscillated over time. Hunting introduced a sharp decrease in the refrigerant flowrate to the evaporator, thus the overall evaporator capacity decreased by 14.1%. With water mal-distribution rate increased, the decrease in overall evaporator capacity was mainly attributed to Circuit 2 with smaller overall heat transfer coefficient.

Available documents

Format PDF

Pages: 38-47

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: Effects of water mal-distribution on thermostatic-expansion-valve stability and its controlled two-circuit evaporator performance.
  • Record ID : 30012597
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 48
  • Publication date: 2014/12

Links


See other articles in this issue (23)
See the source

Indexing