Abstract
A system for the exploitation of the available energy of the sun is proposed in this paper. The system involves a collector, a heat reservoir, a vapor generator, a set of direction control valves and a turbine. These components can be combined to form four closed different cycles in order to generate electricity or store heat according to the outdoor environment. An optimization method is proposed to optimize the energy collected at the shaft of the turbine for a given input sun power. The method establishes a functional relationship between the optimal mass flow rate through the collector, the sun input power and the optimal collected power at the shaft of the turbine. A similar functional relationship is established between the optimal temperature of the working fluid and the sun input power. The collected optimal energy is computed as a function of the sun input power for different temperatures of the vapor generator. The effect of the heat transfer coefficient and coefficient of radiation of Stefan-Boltzmann and the temperature of the vapor generator on the output optimal energy are investigated.
Highlights
Given the demographic and economic boom in the world, the energy demand is increasing tremendously.And the excessive use of fossil fuels have caused dangerous environmental issues like climate changes and resource shortages
Thermal energy storage systems using two tank molten salt systems are common applied for parabolic trough power plants with thermal oil as a heat transfer fluid [6]
The hot fluid is pumped from the heat collector, and directed via DCV1 to the heat reservoir (HR), it is directed by DCV2 to the vapor generator where it transfers its energy to the second working fluid, and it is directed back to the heat collector via DCV4 which forms the second closed cycle
Summary
Given the demographic and economic boom in the world, the energy demand is increasing tremendously.And the excessive use of fossil fuels have caused dangerous environmental issues like climate changes and resource shortages. It is an effective way to use solar energy as a heat source in a power generation cycle.
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