The Modified Productive Structure Analysis of Afyon Geothermal District Heating System for Economic Optimization

Yıl 2013, Cilt: 3 Sayı: 1, 60 - 67, 01.03.2013

Ali Kecebas

Öz

This study deals with exergetic and exergoeconomic analysis of geothermal district heating system (GDHS) which offers nowadays many disadvantages in the aspect of high heat losses and costs. The Afyon GDHS located in the city of Afyonkarahisar/Turkey is selected as a case study. The modified productive structure analysis (MOPSA) is used for exergy-cost evaluation. In these analyses, mass and energy conservation laws are applied to each component of the system. Quantitative balances of the exergy and exergetic cost for the whole system and its each component is carefully considered. The results show that about 52.49% of the input cost of the Afyon GDHS is lost from the heat exchangers, 16.26% from pipes, and 7.22% from pumps. The heat exchangers and their efficiencies should be improved as high as possible to decrease the system costs. The unit cost of heating from geothermal water in the Afyon GDHS is about 711.491 US$/h at 100% load conditions.

Anahtar Kelimeler

geothermal energy; district heating; exergy; economy; MOPSA method

Kaynakça

• S. Erdogmus, H. Aras, E. Koc, “Evaluation of alternative fuels for residential heating in Turkey using analytic network process (ANP) with group decision making”, Renewable and Sustainable Energy Review, vol. 10, pp. 269-279, 2006.
• O. Buyukalaca, H. Bulut, “Detailed weather data for the provinces covered by the Southeastern Anatolia Project (GAP) of Turkey”, Applied Energy, vol. 77, 187-204, 2004.
• O. Kaynakli, “A study on residential heating energy requirement and optimum insulation thickness”, Renewable Energy, vol. 33, pp. 1164-1172, 2008.
• K. J. Ptasinskia, M. N. Koymansb, H. H. G. Verspagen, “Performance of the Dutch Energy Sector based on energy, exergy and extended exergy accounting”, Energy, vol. 31, pp. 3135-3144, 2006.
• A. Bejan, G. Tsatsaronis, M. J. Moran, “Thermal design and optimization”, Wiley, New York, USA, 1996.
• G. Tsatsaronis, M. Winhold, “Exergoeconomic analysis and evaluation of energy conversion plants. 1. A new general methodology”, Energy, vol. 10, pp. 69-80, 1985.
• A. Lazzarettoa, G. Tsatsaronis, “SPECO: A systematic and general methodology for calculating efficiencies and costs in thermal systems”, Energy, vol. 31 pp. 1257-1289, 2006.
• S. Oh, H. Pang, S. Kim, H. Kwak, “Exergy analysis for a gas-turbine cogeneration system”, Journal of Engineering for Gas Turbines and Power, vol. 118, pp. 782-791, 1996.
• S. M. Kim, S. D. Oh, Y. H. Kwon, H. Y. Kwak, “Exergoeconomic analysis of thermal systems”, Energy, vol. 23, pp. 393-406, 1998.
• A. Lazzaretto, G. Tsatsaronis, “On the calculation of efficiencies and costs in thermal systems”, Proceedings of the ASME Advanced Energy Systems Division, vol. 39, pp. 421-430, 1999. [11] M. Kanoglu, A. Ayanoglu, A. Abusoglu, “Exergoeconomic assessment of a geothermal assisted high temperature steam electrolysis system”, Energy, vol. 36, pp. 4422-4433, 2011. [12] A. Abusoglu, S. Demir, M. Kanoglu, “Thermoeconomic assessment of a sustainable municipal wastewater treatment system”, Renewable Energy, vol. 48, pp. 424-435, 2012.
• M. A. Rosen, D. S. Scott, The enhancement of a process simulator for complete energy-exergy analysis. In: R. A. Gaggioli, editor. Analysis of energy systems- design and operation AES, New York: American Society of Mechanical Engineers, vol. 1, pp. 71-80, 1985.
• M. A. Rosen, I. Dincer, “Thermoeconomic analysis of power plants: An application to a coal-red electrical generating Management, vol. 44, pp. 1633-1651, 2003. Energy Conversion and
• L. Ozgener, O. Ozgener, “Monitoring of energy exergy efficiencies geothermal district heating systems (GDHSs)”, Applied Energy, vol. 86, pp. 1704-1711, 2009. parameters of
• A. Kecebas, “Performance and thermo-economic assessments of geothermal district heating system: A case study in Afyon, Turkey”, Renewable Energy, vol. 36, pp. 77-83, 2011.
• M. A. Lozano, A. Valero, “Theory of the exergetic cost”, Energy, vol. 18, pp. 939-960, 1993.
• Y. H. Kwon, H. Y. Kwak, S. D. Oh, “Exergoeconomic analysis of gas turbine cogeneration systems”, International Journal of Exergy, vol. 1, pp. 31-40, 2001.
• H. Y. Kwak, D. J. Kim, J. S. Jeon, “Exergetic and thermoeconomic analyses of power plants”, Energy, vol. 28, pp. 343-360, 2003.
• H. Y. Kwak, H. S. Lee, J. Y. Jung, J. S. Jeon, D. R. Park, “Exergetic and thermoeconomic analysis of a 200-kW phosphoric acid fuel cell plant”, Fuel, Vol. 83, pp. 2087-2094, 2004.
• H. Y. Kwak, G. T. Byun, Y. H. Kwon, H. Yang, “Cost structure of CGAM cogeneration system”, International Journal of Energy Research, Vol. 28, pp. 1145-1158, 2004.
• Z. Oktay, I. Dincer, “Exergoeconomic analysis of the Gonen
• geothermal district heating system for Energy Conversion and [24] C. Coskun, Z. Oktay, I. Dincer, “Modified exergoeconomic modeling of geothermal power plants”, Energy, vol. 36, pp. 6358-6366, 2011.
• A. Kecebas, M. Kayfeci, E. Gedik, “Performance investigation of the Afyon geothermal district heating system for building applications: Exergy analysis”, Applied Thermal Engineering, vol. 31, pp. 1229-1237, 2011.
• A. Kecebas, I. Yabanova, “Thermal monitoring and optimization of geothermal district heating systems using artificial neural network: A case study”, Energy and Buildings, vol. 50, pp. 339-346, 2012.
• A. Kecebas, I. Yabanova, M. Yumurtaci, “Artificial neural network modeling of geothermal district heating system thought exergy analysis”, Energy Conversion and Management, vol. 64, pp. 206-212, 2012.
• L. Ozgener, A. Hepbasli, I. Dincer, “Performance investigation of two geothermal district heating systems for building applications: Energy analysis”, Energy and Buildings, vol. 38, pp. 286-292, 2005.
• L. Ozgener, A. Hepbasli, I. Dincer, “Exergy analysis of two geothermal district heating systems for building applications”, Energy Conversion and Management, vol. 48, pp. 1185-1192, 2007.
• A. Lazzaretto, G. Tsatsaronis, “On the quest for objective equation in exergy costing”, Proceedings of the ASME Advanced Energy Systems Division, New York: American Society of Mechanical Engineers, vol. 37, pp. 197-210, 1997.