Title: Investigation of some renewable energy and exergy parameters for two Geothermal District Heating Systems

Authors: C. Coskun, Z. Oktay, I. Dincer

Addresses: Faculty of Engineering, Mechanical Engineering Department, Balikesir University, 10110 Balikesir, Turkey. ' Faculty of Engineering, Mechanical Engineering Department, Balikesir University, 10110 Balikesir, Turkey. ' Faculty of Engineering and Applied Science, University of Ontario Institute of Technology (UOIT), 2000 Simcoe St. N., Oshawa, ON L1H 7K4, Canada

Abstract: In this study, three new exergy parameters, namely total exergy destruction ratio, component exergy destruction ratio and dimensionless exergy destruction are introduced in addition to energetic renewability ratio, exergetic renewability ratio, energetic reinjection ratio and exergetic reinjection ratio, and compared for Edremit and Bigadic Geothermal District Heating Systems (GDHSs) based on their actual data. The respective daily graphs of these parameters are presented. Also, regression analyses using the actual data are performed to obtain some correlations for practical use. In brief, these parameters help us to identify the degree of renewability and other aspects and provide some insights.

Keywords: performance evaluation; geothermal district heating; renewable energy; exergy destruction; geothermal energy; energetic renewability; exergetic renewability; energetic reinjection; exergetic reinjection.

DOI: 10.1504/IJEX.2011.037211

International Journal of Exergy, 2011 Vol.8 No.1, pp.1 - 15

Published online: 30 Nov 2010 *

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