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

Thu, Kyaw and Saththasivam, Jayaprakash and Saha, Bidyut Baran and Chua, Kian Jon and Murthy, Srinivasa S and Ng, Kim Choon (2017) Experimental investigation of a mechanical vapour compression chiller at elevated chilled water temperatures. In: APPLIED THERMAL ENGINEERING, 123 . pp. 226-233.

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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 degrees C) at various coolant temperatures (28-32 degrees C) and flow rates (Delta T = 4 and 5 degrees 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 degrees 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. (C) 2017 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	APPLIED THERMAL ENGINEERING
Additional Information:	Copy right for this article belongs to the PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Department/Centre:	Division of Interdisciplinary Sciences > Interdisciplinary Centre for Energy Research
Date Deposited:	24 Aug 2017 05:19
Last Modified:	15 Oct 2018 10:52
URI:	http://eprints.iisc.ac.in/id/eprint/57663

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