The construction of the first generation of commercial hybrid solar gas-turbine power plants will present the designer with a large number of choices. To assist decision making, a thermoeconomic study has been performed for three different power plant configurations, namely, simple- and combined-cycles along with a simple-cycle with the addition of thermal energy storage. Multi-objective optimization has been used to identify Pareto-optimal designs and highlight the trade-offs between minimizing investment costs and minimizing specific CO2 emissions. The solar hybrid combined-cycle power plant provides a 60% reduction in electricity cost compared to parabolic trough power plants at annual solar shares up to 20%. The storage integrated designs can achieve much higher solar shares and provide a 7–13% reduction in electricity costs at annual solar shares up to 90%. At the same time, the water consumption of the solar gas-turbine systems is significantly lower than conventional steam-cycle based solar power plants.
A Comparative Thermoeconomic Study of Hybrid Solar Gas-Turbine Power Plants
Contributed by the Electric Power Committee of ASME for publication in the Journal of Engineering for Gas Turbines and Power. Manuscript received June 27, 2013; final manuscript received July 9, 2013; published online October 21, 2013. Editor: David Wisler.
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Spelling, J., Laumert, B., and Fransson, T. (October 21, 2013). "A Comparative Thermoeconomic Study of Hybrid Solar Gas-Turbine Power Plants." ASME. J. Eng. Gas Turbines Power. January 2014; 136(1): 011801. https://doi.org/10.1115/1.4024964
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