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کلیدواژهها
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heat pump, hydrogen production, organic Rankine cycle, parabolic trough collector,
thermochemical cycle
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چکیده
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In this research, a novel integrated system for renewable hydrogen production,
power, and hot water from solar thermal energy has been developed and pre-
cisely evaluated in terms of thermodynamics. The developed structure is com-
prised of a four-step Cu-Cl thermochemical cycle, and an organic Rankine
cycle to generate electricity. The required heat is supplied by a concentrated
solar power plant and thermal energy storage based on latent heat. Also, a
high-temperature heat pump is employed to improve the thermal grade of
working fluid and provide each unit with sufficient heat. System dynamics
simulation has been performed using weather and irradiation input data of
Tehran, Iran. The integrated structure has the capability to produce 21.75 kg/h
of hydrogen, 563.6 kW of electricity, and 393.3 m3/h of hot water at 70C. The
energy efficiency of the system reaches more than 80% based on higher heating
value and the solar-to-fuel efficiency has a value of 25.8%. Moreover, an exergy
analysis has been executed to determine the fundamental operating parame-
ters of each component and the whole structure. The total exergy efficiency of
the integrated structure is 34.23%, and the prime cost of the product is found
to be 5.795 USD/kg H2.
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