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Entropy 2016, 18(3), 86; doi:10.3390/e18030086

Exergy and Thermoeconomic Analysis for an Underground Train Station Air-Conditioning Cooling System

Department of Energy and Refrigerating Air-conditioning Engineering, National Taipei University of Technology, 1, Sec. 3, Zhong Xiao E. Road, Taipei 10608, Taiwan
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Author to whom correspondence should be addressed.
Academic Editor: Reiner Kümmel
Received: 25 November 2015 / Revised: 22 February 2016 / Accepted: 23 February 2016 / Published: 7 March 2016
(This article belongs to the Special Issue Entropy and the Economy)
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Abstract

The necessity of air-conditioning causes the enormous energy use of underground train stations. Exergy and thermoeconomic analysis is applied to the annual operation of the air-conditioning system of a large underground train station in Taiwan. The current installation and the monitored data are taken to be the base case, which is then compared to three different optimized designs. The total revenue requirement levelized cost rate and the total exergy destruction rate are used to evaluate the merits. The results show that the cost optimization objective would obtain a lower total revenue requirement levelized cost rate, but at the expense of a higher total exergy destruction rate. Optimization of thermodynamic efficiency, however, leads to a lower total exergy destruction rate, but would increase the total revenue requirement levelized cost rate significantly. It has been shown that multi-objective optimization would result in a small marginal increase in total revenue requirement levelized cost rate, but achieve a significantly lower total exergy destruction rate. Results in terms of the normalized total revenue requirement levelized cost rate and the normalized total exergy destruction rate are also presented. It has been shown by second law analysis when applied to underground train stations that lower annual energy use and lower CO2 emissions can be achieved. View Full-Text
Keywords: exergy; thermoeconomic analysis; air-conditioning system; underground train station exergy; thermoeconomic analysis; air-conditioning system; underground train station
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. (CC BY 4.0).

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MDPI and ACS Style

Liao, K.Y.; Chuah, Y.K. Exergy and Thermoeconomic Analysis for an Underground Train Station Air-Conditioning Cooling System. Entropy 2016, 18, 86.

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