Exergy analysis of two geothermal district heating systems for building applications

Ozgener L., Hepbasli A., Dincer I.

Energy Conversion and Management, vol.48, no.4, pp.1185-1192, 2007 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 48 Issue: 4
  • Publication Date: 2007
  • Doi Number: 10.1016/j.enconman.2006.10.003
  • Journal Name: Energy Conversion and Management
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1185-1192
  • Keywords: geothermal energy, building, energy, exergy, efficiency, renewable energy
  • Manisa Celal Bayar University Affiliated: Yes

Abstract

This study evaluates the exergetic performance of two local Turkish geothermal district heating systems through exergy analysis. The exergy destructions in these geothermal district heating systems are quantified and illustrated using exergy flow diagrams for a reference temperature of 1 °C using the 2003 and 2004 actual seasonal heating data. The results indicate that the exergy destructions in these systems particularly occur due to losses in pump, heat exchangers, pipelines, and the reinjection of thermal water. Exergy efficiencies of the two systems are investigated for the system performance analysis and improvement and are determined to be 42.89% and 59.58%, respectively. © 2006 Elsevier Ltd. All rights reserved.