Entropy 2010, 12(3), 375-389; doi:10.3390/e12030375
Article

Second-Law Analysis to Improve the Energy Efficiency of Screw Liquid Chillers

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Received: 1 January 2010; in revised form: 2 February 2010 / Accepted: 1 March 2010 / Published: 4 March 2010
(This article belongs to the Special Issue Exergy: Analysis and Applications)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: This work applies the second-law analysis of thermodynamics to quantify the exergy destruction of the components of screw liquid chiller, and to identify the potential for each component to contribute to improve the overall energy efficiency of the system. Three screw liquid chiller units were built to demonstrate the feasibility of the model presented herein. Unit A was a 100 RT water-cooled screw liquid chiller. Unit B was modified from Unit A by switching the old condenser for a new one with a greater heat transfer, and Unit C was modified from Unit B by exchanging the compressor for a more efficient one. The results indicate that the compressor has the largest potential to improve energy efficiency, followed in order by the condenser, and then the evaporator. The second law analysis may help engineers to focus on the components with higher exergy destruction and quantify the extent to which modifying such components can influence, favorably or unfavorably, the performance of other components of the screw liquid chiller.
Keywords: second-law analysis; screw liquid chiller; energy efficiency; irreversibility; exergy destruction
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MDPI and ACS Style

Lee, T.-S. Second-Law Analysis to Improve the Energy Efficiency of Screw Liquid Chillers. Entropy 2010, 12, 375-389.

AMA Style

Lee T-S. Second-Law Analysis to Improve the Energy Efficiency of Screw Liquid Chillers. Entropy. 2010; 12(3):375-389.

Chicago/Turabian Style

Lee, Tzong-Shing. 2010. "Second-Law Analysis to Improve the Energy Efficiency of Screw Liquid Chillers." Entropy 12, no. 3: 375-389.

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