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Experimental analysis of the performances of variable refrigerant flow systems.

Author(s) : XIA J., WINANDY E., GEORGES B., et al.

Type of article: Article

Summary

This article presents a testing methodology applicable to variable refrigerant flow (VRF) equipment. A test bench is presented: it consists of a set of six calorimeters, each fully instrumented and controlled in such a way as to compensate almost all combinations of sensible, latent, heating and cooling loads. This test bench is used for a three-pipe VRF system with five indoor units and one outdoor unit. Examples of testing results are presented in the paper, in order to illustrate the methodology and also validate a simulation model. The (heating or cooling) emission of each indoor unit is identified thanks to a very accurate 'air' balance inside each calorimeter. Refrigerant side (pressure and temperature) measurements are used in order to identify the refrigerant flow rate and the characteristics of the compressors (isentropic effectiveness) and of the terminal units (heat transfer coefficients) in different regimes. Examples of overall performance evaluation are also presented.

Details

  • Original title: Experimental analysis of the performances of variable refrigerant flow systems.
  • Record ID : 2004-2449
  • Languages: English
  • Source: Build. Serv. Eng. Res. Technol. - vol. 25 - n. 1
  • Publication date: 2004
  • Document available for consultation in the library of the IIR headquarters only.

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