Energy, exergy and pinch analyses of an integrated cryogenic natural gas process based on coupling of absorption–compression refrigeration system, organic Rankine cycle and solar parabolic trough collectors

Ghorbani, Bahram; Ebrahimi, Armin; Skandarzadeh, Fatemeh; Ziabasharhagh, Masoud

doi:10.1007/s10973-020-10158-3

Cited by 9 publications

(3 citation statements)

References 52 publications

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“…It is also feasible to use the unit’s squandered energy by utilizing ACCs. − The most famous working fluids for single-stage ACCs are water/lithium bromide (LiBr/H 2 O) and ammonia/water (NH 3 /H 2 O) . In addition, much research has been conducted on the performance of ACCs using other working fluids such as ammonia/lithium nitrate (LiNO 3 /NH 3 ), lithium bromide + zinc bromide/methoxide (LiBr + ZnBr 2 /CH 3 O), and calcium chloride/water (H 2 O/CaCl 2 ). , There are studies on the use of this technology, especially in power plants, food industries, , and oil and gas industries. , In particular, some studies have been conducted for the indirect use of ACCs to improve cooling performance in the LNG industry. − Also, diffusion–absorption − and absorption–compression − refrigeration process cycles are used to provide refrigeration in integrated structures. Figure illustrates a schematic of multieffect ACCs used in integrated systems.…”

Section: Different Methods To Improve the Performance Of Hydrogen Liq...mentioning

confidence: 99%

Strategies To Improve the Performance of Hydrogen Storage Systems by Liquefaction Methods: A Comprehensive Review

et al. 2023

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The main challenges of liquid hydrogen (H2) storage as one of the most promising techniques for large-scale transport and long-term storage include its high specific energy consumption (SEC), low exergy efficiency, high total expenses, and boil-off gas losses. This article reviews different approaches to improving H2 liquefaction methods, including the implementation of absorption cooling cycles (ACCs), ejector cooling units, liquid nitrogen/liquid natural gas (LNG)/liquid air cold energy recovery, cascade liquefaction processes, mixed refrigerant systems, integration with other structures, optimization algorithms, combined with renewable energy sources, and the pinch strategy. This review discusses the economic, safety, and environmental aspects of various improvement techniques for H2 liquefaction systems in more detail. Standards and codes for H2 liquefaction technologies are presented, and the current status and future potentials of H2 liquefaction processes are investigated. The cost-efficient H2 liquefaction systems are those with higher production rates (>100 tonne/day), higher efficiency (>40%), lower SEC (<6 kWh/kgLH2), and lower investment costs (1–2 $/kgLH2). Increasing the stages in the conversion of ortho- to para-H2 lowers the SEC and increases the investment costs. Moreover, using low-temperature waste heat from various industries and renewable energy in the ACC for precooling is significantly more efficient than electricity generation in power generation cycles to be utilized in H2 liquefaction cycles. In addition, the substitution of LNG cold recovery for the precooling cycle is associated with the lower SEC and cost compared to its combination with the precooling cycle.

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Section: Different Methods To Improve the Performance Of Hydrogen Liq...mentioning

confidence: 99%

Strategies To Improve the Performance of Hydrogen Storage Systems by Liquefaction Methods: A Comprehensive Review

et al. 2023

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“…The cycles considered in this study are based on the first and second laws of thermodynamics. Thus, the balances of the energy, exergy, exergoeconomic and exergoenvironmental equations for all equipment under certain conditions are considered with the following assumptions 12 Ambient conditions are considered at 101 kPa and 298 K. The heat loss of the equipment has been waived. Steady‐state conditions are assumed. The input parameters in the two cycles are considered the same. The ejector works adiabatically. Friction is not considered in any of the equipment. There is no pressure loss in heat exchangers. The valve works as a constant enthalpy. Isentropic efficiency is considered for power‐consuming and generating equipment such as the compressor, pump, steam turbine, and gas turbine. …”

Section: Methodsmentioning

confidence: 99%

“…Thus, the balances of the energy, exergy, exergoeconomic and exergoenvironmental equations for all equipment under certain conditions are considered with the following assumptions. 12 1. Ambient conditions are considered at 101 kPa and 298 K.…”

Section: Thermodynamic Assumptionsmentioning

confidence: 99%

Comparative thermoeconomic optimization and exergoenvironmental analysis of an ejector refrigeration cycle integrated with a cogeneration system utilizing waste exhaust heat recovery

Fazeli

Zandi

Mofrad

et al. 2022

Env Prog and Sustain Energy

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Two cogeneration cycles based on gas turbines have been compared by means of thermoeconomic and environmental analyses. The analyzed cogeneration systems are gas turbine, organic Rankine cycle (GT + ORC) and an integrated system including gas turbine, organic Rankine cycle, and ejector refrigeration cycle (GT + ORC + ERC). This work has focused on environmental considerations and thermoeconomic evaluation to decrease destruction cost and environmental impacts. The examination of cycles is conducted from energy, exergy, exergoeconomic, and exergoenvironmental (4E) perspectives. A computer MATLAB program is used to generate the simulation results, and the REFPROP 9.1 database is utilized to get thermodynamic properties of the working fluids. The use of the refrigeration evaporator in GT + ORC + ERC increased energy and exergy efficiencies. Multi-objective optimization results indicate that the waste heat utilization in the trigeneration system is more effective in all aspects. In optimal conditions, the exergy efficiency and destruction cost of the GT + ORC + ERC system reached 40.76% and 151.95$ h À1 , respectively. Moreover, optimization is performed by means of energy efficiency and destruction environmental impact as objective functions, and the optimum values are obtained at 30.67% and 46,918.30 mpts h À1 , respectively.

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Exergo-economic optimization of concentrated solar photovoltaic and thermoelectric hybrid generator

Ismaila

Sahin

Yilbaş

2021

J Therm Anal Calorim

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Energy, exergy and pinch analyses of an integrated cryogenic natural gas process based on coupling of absorption–compression refrigeration system, organic Rankine cycle and solar parabolic trough collectors

Cited by 9 publications

References 52 publications

Strategies To Improve the Performance of Hydrogen Storage Systems by Liquefaction Methods: A Comprehensive Review

Strategies To Improve the Performance of Hydrogen Storage Systems by Liquefaction Methods: A Comprehensive Review

Comparative thermoeconomic optimization and exergoenvironmental analysis of an ejector refrigeration cycle integrated with a cogeneration system utilizing waste exhaust heat recovery

Exergo-economic optimization of concentrated solar photovoltaic and thermoelectric hybrid generator

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