Investigation of exergetic efficiency and thermodynamic parameters of the salihli geothermal district heating system

ASME, Energy Sustainability Division;ASME, Solar Energy Division2007 Energy Sustainability Conference -- 27 June 2007 through 30 June 2007 -- Long Beach, CA -- 70735This study investigates thermodynamic parameters and exergetic efficiency of the Salihli geothermal district heating system (SGDHS) in Manisa, Turkey for 2005/2006 heating season. The thermodynamic parameters considered are as follows: (i) fuel depletion rate, (ii) relative irreversibility, (iii) productivity lack, and (iv) exergetic factor. These parameters are determined for the system to assess and compare their individual performances. While the highest relative irreversibilities occur in the heat exchangers with the values of 44% for the SGDHS, exergetic efficiency of the system is found to be 60.3%. Copyright © 2007 by ASME

Thermomechanical exergy and thermoeconomic analysis of geothermal district heating systems

WOS: 000255045200004The current paper presents the thermomechanical exergy and thermoeconomic analysis of geothermal district heating systems (GDHSs) in Turkey. The case studies cover the actual system data taken from the systems in Afyon, Gonen, and Salihli GDHSs, Turkey. General energy and exergy analysis of the GDHSs are introduced. Then the analysis applied to these GDHSs using actual thermodynamic data for their performance evaluations in terms of energy and exergy efficiencies are presented. Besides, thermoeconomic evaluations of GDHSs are given in tables

Monitoring of energetic and exergetic performance analysis of salihli geothermal district heating system

This study deals with a monitoring and assessment of energetic and exergetic analysis of Salihli Geothermal District Heating System (SGDHS) in Manisa, Turkey. In the analysis, actual system yearly average data of latest heating season are used to assess the district heating system exergetic performance. New exergetic model is improved and compared with old exergetic model results throughout the SGDHS. The new exergy losses occur particularly due to the fluid flow, taking place in the reinjection of thermal water (e.g., geothermal fluid), pumps, and the heat exchanger, as well as the natural direct discharge of the system., Copyright © 2008 by ASME

Exergy and reliability analysis of wind turbine systems: A case study

The present study undertakes an exergy and reliability analysis of wind turbine systems and applies to a local one in Turkey: the exergy performance and reliability of the small wind turbine generator have been evaluated in a demonstration (1.5 kW) in Solar Energy Institute of Ege University (latitude 38.24 N, longitude 27.50 E), Izmir, Turkey. In order to extract the maximum possible power, it is important that the blades of small wind turbines start rotating at the lowest possible wind speed. The starting performance of a three-bladed, 3 m diameter horizontal axis wind turbine was measured in field tests. The average technical availability, real availability, capacity factor and exergy efficiency value have been analyzed from September 2002 to November 2003 and they are found to be 94.20%, 51.67%, 11.58%, and 0-48.72%, respectively. The reliability analysis has also been done for the small wind turbine generator. The failure rate is high to an extent of 2.28×10-4 h-1 and the factor of reliability is found to be 0.37 at 4380 h. If failure rate can be decreased, not only this system but also other wind turbine systems of real availability, capacity factor and exergy efficiency will be improved. © 2006 Elsevier Ltd. All rights reserved

Performance analysis of geothermal district heating and geothermal heat pump applications in buildings

This study describes Geothermal District Heating Systems (GDHSs) and Geothermal Heat Pumps (GHPs) and their energetic and exergetic performance analysis. The case studies cover the actual system data taken from the systems, Turkey. General energy and exergy efficiencies of the GDHSs and GHP are introduced. Then this analysis applied to selected GDHS and GHP system using actual thermodynamic data for theirs recent performance evaluations in terms of energy and exergy efficiencies. © 2011 by Nova Science Publishers, Inc. All rights reserved

INTERNATIONAL JOURNAL OF EXERGY

The paper describes a performance evaluation of the industrial pasta process system in Gaziantep, based in Turkey, on energy and exergy analyses. The case study covers the actual system data taken from the system. General energy and exergy analysis of the system are introduced. This analysis, applied to the system using actual thermodynamic data for its performance evaluation in terms of energy and exergy efficiencies, is presented. In addition a parametric study of the effect of varying reference state properties on the energy and exergy efficiencies of the system has been conducted to find optimum performance and operating conditions, and is explained

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY

The current paper presents the thermomechanical exergy and thermoeconomic analysis of geothermal district heating systems (GDHSs) in Turkey. The case studies cover the actual system data taken from the systems in Afyon, Gonen, and Salihli GDHSs, Turkey. General energy and exergy analysis of the GDHSs are introduced. Then the analysis applied to these GDHSs using actual thermodynamic data for their performance evaluations in terms of energy and exergy efficiencies are presented. Besides, thermoeconomic evaluations of GDHSs are given in tables