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Improving chiller efficiency.

Author(s) : VENKATACHALAM S. V.

Type of article: Article

Summary

Air-conditioning systems account for 40 to 60% of the total electrical power consumption in buildings, depending on the load profile, location and duty conditions. The hybrid plant considered in this article has three water cooled chillers of 500 TR each with open type compressors, plus a 500 TR tandem type water cooled chiller with four compressors (all compressors being of equal capacity). All the chillers operate with R-22. For water cooled chillers with constant flow rate, out of the many factors I have analyzed, one stands out in my view: Entering Condenser Water Temperature (ECWT). This must be kept as low as possible for achieving better system performance. We are aware that the lower the ECWT, the lower will be the kW per TR produced by the chiller. But caution must be exercised while doing this on different types of chillers, namely open type, semi-hermetic and hermetic compressor systems. Unless an analysis is made and recorded, we would not be in a position to appreciate the effect of lower ECWT.

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Pages: 38-49 (8 p.)

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Details

  • Original title: Improving chiller efficiency.
  • Record ID : 30018400
  • Languages: English
  • Source: Air Conditioning and Refrigeration Journal - vol. 19 - n. 1
  • Publication date: 2016/01

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