A comparative analysis of novel combined flash-binary cycles for Sabalan geothermal wells: Thermodynamic and exergoeconomic viewpoints. (15th October 2020)

• Record Type: Journal Article
• Authors: Abdolalipouradl, Mehran; Mohammadkhani, Farzad; Khalilarya, Shahram
• Is Part Of: Energy. Volume 209(2020)
• Publication Date: 2020-10-15
• Subjects: Sabalan geothermal field -- Exergy -- Exergoeconomics -- Flash-binary -- Organic rankine cycle (ORC); Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2020.118235
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: Sabalan geothermal field is one of the most important geothermal fields in Iran. In this study, four novel configurations namely Single Flash-ORC (SF-ORC), Double Flash 1-ORC (DF1-ORC), Double Flash 2-ORC (DF2-ORC) and Triple Flash-ORC (TF-ORC) are proposed to produce power from two wells of the field. The configurations are assessed by thermodynamic and exergoeconomic viewpoints. The exergy and SPECO based exergoeconomic equations are developed for the components of the proposed cycles and thermodynamic as well as exergoeconomic performance parameters are calculated for the components and the cycles. A comprehensive parametric study is also carried out for the proposed configurations considering various working fluids in the ORCs. Moreover, an optimization is performed to maximize the produced power from the wells. The results depicted that the DF1-ORC produces 4.03%, 1.32% and 1.2% more power than the SF-ORC, DF2-ORC and TF-ORC, respectively, in the optimum condition. It can be concluded from the exergoeconomic analysis that the SF-ORC with R123 working fluid has the best exergoeconomic performance with the power specific cost of 3.62 $/GJ. The thermodynamic and exergoeconomic performance of the DF1-ORC is compared with previous similar studies which shows the superiority of the proposed cycle. Highlights: Four novel flash-binary based cycles are proposed for Sabalan geothermal field. The proposed cycles utilize the energy of two wells simultaneously. Thermodynamic and exergoeconomic analyses are performed for the cycles. A parametric study and a thermodynamic optimization are carried out. Single Flash-ORC with R123 working fluid has the best exergoeconomic performance.