Exergy analysis of a new proposal combined cycle from Sabalan geothermal source

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Abdolalipour adl Mehran; KHALILARYA SHAHRAM; JAFARMADAR SAMAD

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Journal: Modares Mechanical Engineering Year:2018 | Volume:18 | Issue:4 Page(s): 11-22

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Title

Exergy analysis of a new proposal combined cycle from Sabalan geothermal source

Author(s)

Abdolalipour adl Mehran | KHALILARYA SHAHRAM | JAFARMADAR SAMAD | Issue Writer Certificate

Keywords

Exergy analysisQ1

Sabalan Geothermal Power PlantQ1

Organic Rankine CycleQ1

Supercritical Carbon Dioxide CycleQ1

Abstract

The use of new energies, including geothermal energy, is rapidly devoloping in the world. In Iran, the Sabalan area has a great potential for generating energy from geothermal energy sources. In this paper, a new power generation combined cycle (flash combined cycle with supercritical carbon dioxide and Organic Rankine Cycle) is proposed with respect to two wells with different temperatures and pressures for Sabalan geothermal sources. For the Organic Rankine Cycle, four fluids are considered appropriately and then proposed combination cycle is investigated by energy and Exergy analysis. In this study, a new method proposed for the determination of Pinch point for carbon dioxide heat exchangers. In the end the proposed cycle has been optimized relative to seprators pressure, the second evaporator temperature and the carbon dioxide cycle pressure ratio. The results show that the n-butane agent has been selected as the most suitable fluid for the Rankine cycle. For the optimal condition, the net power of the proposed cycle is 19934 kW, the cycle efficiency will be 17. 05% and the exergy efficiency will be 65. 38%. The results of Exergy analysis show that the low pressure turbine in geothermal have the highest value of exergy destruction. The results show that net power output, energy and exergy efficiencies of the proposed cycle in this paper is 15. 29 %, 17. 06% and 18. 35% higher than the corresponding values obtained for the previously proposed system.

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APA: Copy

Abdolalipour adl, Mehran, KHALILARYA, SHAHRAM, & JAFARMADAR, SAMAD. (2018). Exergy analysis of a new proposal combined cycle from Sabalan geothermal source. MODARES MECHANICAL ENGINEERING, 18(4 ), 11-22. SID. https://sid.ir/paper/179496/en

Vancouver: Copy

Abdolalipour adl Mehran, KHALILARYA SHAHRAM, JAFARMADAR SAMAD. Exergy analysis of a new proposal combined cycle from Sabalan geothermal source. MODARES MECHANICAL ENGINEERING[Internet]. 2018;18(4 ):11-22. Available from: https://sid.ir/paper/179496/en

IEEE: Copy

Mehran Abdolalipour adl, SHAHRAM KHALILARYA, and SAMAD JAFARMADAR, “Exergy analysis of a new proposal combined cycle from Sabalan geothermal source,” MODARES MECHANICAL ENGINEERING, vol. 18, no. 4 , pp. 11–22, 2018, [Online]. Available: https://sid.ir/paper/179496/en

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