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Thermodynamic and exergoeconomic analysis of two novel tri-generation cycles for power, hydrogen and freshwater production from geothermal energy

机译：热力学和对电力，氢气和淡水生产的两种新型三进体循环从地热能的热力学和exergo经济分析

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摘要

Thermodynamic and exergoeconomic analysis of two novel tri-generation systems based on single and double flash are reported to generate power and produce hydrogen and freshwater from geothermal energy. Both proposed cycles use the organic Rankine cycle to generate power, proton exchange membrane electrolyzer to produce hydrogen and reverse osmosis desalination to produce freshwater. The proposed cycles are assessed based on the thermodynamic and exergoeconomic approaches. Different single-objective optimizations are done to maximize produced power and thermal and exergy efficiencies as well as minimize power production cost. Multi-objective optimization is also performed based on weight coefficients. Moreover, the thermodynamic and exergoeconomic parameters of the proposed systems in different conditions are investigated through a comprehensive parametric study. The results showed that the tri-generation system based on the double flash (system 2) has better performance from the exergy and exergoeconomic viewpoints compared to the single flash based one (system 1) so that the optimum values of 8613 kW, 2.308 kg/hr, 9.502 kg/s, 12.96%, 53.79%, and 5.845 $/GJ are obtained for net power output, hydrogen production rate, desalinated water rate, energy and exergy efficiencies, and power specific cost of this system at the geofluid temperature of 200 degrees C.
机译：据报道，两种基于单闪光和双闪光的三种新型系统的热力学和Exergo经济分析，产生功率并产生从地热能产生氢气和淡水。两个提出的循环都使用有机朗肯循环来产生功率，质子交换膜电解槽，以产生氢并反渗透脱水，以产生淡水。基于热力学和exergo经济方法评估所提出的循环。完成了不同的单目标优化，以最大限度地提高产生的功率和热和漏洞效率，以及最大限度地减少电力生产成本。还基于权重系数执行多目标优化。此外，通过综合参数研究调查了所提出的系统中所提出的系统的热力学和Exergo经济参数。结果表明，与单闪存的一个（系统1）相比，基于双闪光（系统2）的三进生成系统具有更好的功率和exergoonomic观点的性能，使得8613 kW，2.308kg / HR，9.502千克/秒，12.96％，53.79％和5.845 $ / GJ为净功率输出，氢气生产率，脱盐水速，能源和漏洞效率以及该系统的功率特定成本，在地理流体温度下200摄氏度

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