Experimental investigation of a mechanical vapour compression chiller at elevated chilled water temperatures

Kyaw Thu, Jayaprakash Saththasivam, Bidyut Baran Saha, Kian Jon Chua, S. Srinivasa Murthy, Kim Choon Ng

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The performance of a Mechanical Vapour Compression (MVC) chiller is experimentally investigated under operating conditions suitable for sensible cooling. With the emergence of the energy efficient dehumidification systems, it is possible to decouple the latent load from the MVC chillers which can be operated at higher chilled water temperatures for handling sensible cooling load. In this article, the performance of the chiller is evaluated at the elevated chilled water outlet temperatures (7–17 °C) at various coolant temperatures (28–32 °C) and flow rates (ΔT = 4 and 5 °C) for both full- and part-load conditions. Keeping the performance at the AHRI standard as the baseline condition, the efficacy of the chiller in terms of compression ratio, cooling capacity and COP at aforementioned conditions is quantified experimentally. It is observed that for each one-degree Celsius increase in the chilled water temperature, the COP of the chiller improves by about 3.5% whilst the cooling capacity improvement is about 4%. For operation at 17 °C chilled water outlet temperature, the improvements in COP and cooling capacity are between 37–40% and 40–45%, respectively, compared to the performance at the AHRI standards. The performance of the MVC chiller at the abovementioned operation conditions is mapped on the chiller performance characteristic chart.

Original languageEnglish
Pages (from-to)226-233
Number of pages8
JournalApplied Thermal Engineering
Volume123
DOIs
Publication statusPublished - 1 Jan 2017

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Vapors
Cooling
Water
Temperature
Coolants
Flow rate

Keywords

  • Coefficient of performance
  • Elevated chilled water temperature
  • Mechanical vapour compression chiller
  • Refrigerant R134a

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering

Cite this

Experimental investigation of a mechanical vapour compression chiller at elevated chilled water temperatures. / Thu, Kyaw; Saththasivam, Jayaprakash; Saha, Bidyut Baran; Chua, Kian Jon; Srinivasa Murthy, S.; Ng, Kim Choon.

In: Applied Thermal Engineering, Vol. 123, 01.01.2017, p. 226-233.

Research output: Contribution to journalArticle

Thu, Kyaw ; Saththasivam, Jayaprakash ; Saha, Bidyut Baran ; Chua, Kian Jon ; Srinivasa Murthy, S. ; Ng, Kim Choon. / Experimental investigation of a mechanical vapour compression chiller at elevated chilled water temperatures. In: Applied Thermal Engineering. 2017 ; Vol. 123. pp. 226-233.
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