A non-structural fuzzy decision method developed for organic Rankine cycles used in liquid-dominated geothermal fields of medium/high temperature
نویسندگان
چکیده
Abstract A reliable decision-making method is of great importance for the designing a practical and efficient organic Rankine cycle (ORC) system employed to exploit geothermal energy. This paper develops three-level non-structural fuzzy decision algorithm comprehensive evaluation geo-fluid driven trans-critical ORC (TORC) on basis progressive performance hierarchy, involving environmental characteristics, safety, thermodynamic techno-economic performance. Two representative reservoirs with medium (GR-I) high (GR-II) temperature are investigated realize validate proposed method. Four mathematical models six working fluids thirteen indexes developed fulfill courses. Parametric analysis results criteria conducted including specific net out power ( P ), thermal efficiency ? t exergy e heat transfer area per output (APR) electricity production cost (EPC), different TORC GR-I GR-II fully revealed. As GR-I, result ranking order R142b, R134a, R290, R1270, R227ea R143a. In regard GR-II, it’s Both show that R142b performs best. obtains maximal 110.94 kW/(kg·s?1) 198.14 kW/(kg·s?1), 14.05% 14.43%, 51.42% 42.90%, minimal APR 0.262(m2/kW) 0.185(m2/kW), EPC 0.030($/(kW·h)) 0.022($/(kW·h)). Summarily, this can provide important guidance decisive solution by concisely display pros cons each scheme resource utilization.
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ژورنال
عنوان ژورنال: Energy Conversion and Management
سال: 2021
ISSN: ['0196-8904', '1879-2227']
DOI: https://doi.org/10.1016/j.enconman.2021.113861