Evaluation and optimization of a novel geothermal-driven hydrogen production system using an electrolyser fed by a two-stage organic Rankine cycle with different working fluids

A review of geothermal energy-driven hydrogen production systems

“…geothermal fluid temperature [80], and working fluid [86,87]. It has been noticed that the rate of hydrogen production is proportional to both geothermal and water electrolysis temperatures.…”

“…In Ref. [86], a parametric study was carried out to choose the suitable working fluid in hydrogen production systems using GE. The authors deduced that the best working fluid is R123 followed by isopentane such that the former corresponds to hydrogen production of 11.42 g/s while the latter of 11.31 g/s.…”

“…Year Cost System(s) Cao et al [86] 2020 36.9 $/GJex Two-stage ORC Cao et al [80] 2018 1.33 $/GJex Flash cycle, KC & AC Ebadollahi et al [84] 2019 409.4 $/GJh ORC, ejector refrigeration & LNG power generation Ghaebi et al [87] 2018 4.921 $/GJh Regenerative ORC Gholamian et al [88] 2018 21.96 $/GJen ORC & thermoelectric generator Kianfard et al [94] 2018 4.257 $/kgh Dual-fluid ORC & RO desalination unit Yilmaz [85] 2017 1.088 $/kgh Flash-binary geothermal based-ORC Yilmaz et al [81] 2015 2.366 $/kgh Geothermal binary ORC Yilmaz et al [78] 2019 1.088 $/kgh Flash-binary geothermal based-ORC Yilmaz et al [82] 2015 3.…”

Design and parametric study of a novel solar‐driven trigeneration application utilizing a heliostat field with thermal energy storage

“…T A B L E 1 Input data for the proposed solar CCHP system 4,6,31,32 η Field is the optical efficiency of the heliostat field, A Hel is the area of each collector and N Hel is the number of collectors. Also, _ Q Sun is the solar energy rate absorbed by the heliostat field.…”

“…T A B L E 2 Modeling of the hot storage tank [1][2][3]31,36,37 Description of the equation Charging period…”