A hybrid power generation system: solar-driven Rankine engine-hydrogen storage

This paper reports on the feasibility of a hybrid power generation system c onsisting of a solar energy-driven Rankine engine and a hydrogen storage un it. Solar energy, the power for the hybrid system, is converted into electr ical power through a combination of a solar collector, a tracking device to maintain proper orientation with the sun and a Rankine cycle engine drivin g an electrical power generator. Excess electricity is utilized to produce hydrogen for storage through electrolysis of water. At the solar down time, the stored hydrogen can be used to produce high-quality steam in an aphodi d burner to operate a turbine and with a field modulated generator to suppl ement electric power. Case studies are carried out on the optimum configura tion of the hybrid system satisfying the energy demand. A numerical example based on the actual measured solar input is also included to demonstrate t he design potential. Copyright (C) 2001 John Wiley & Sons, Ltd.