研究目的
To analyze the dynamic responses of several key parameters in a CPV/CSP hybrid system under varying irradiation and extreme working conditions.
研究成果
The CPV/CSP hybrid system can rapidly respond to solar radiation saltation, reaching steady state in less than about 53 s. A lower gradient of solar radiation is beneficial for reducing thermal hysteresis and improving thermal stability. The all-day dynamic performance shows that the power output and flow rate are directly related to DNI, with the outlet temperature of R134a vapor remaining almost constant except during starting and stopping periods.
研究不足
The study assumes constant saturation temperature of R134a and fixed working pressure in the cooling subsystem, which may not account for all real-world variations. Additionally, no thermal energy storage is considered in the analysis.
1:Experimental Design and Method Selection:
A dynamic physical model is developed for the CPV/CSP hybrid system to analyze the dynamic responses of key parameters to solar radiation saltation or linear variation.
2:Sample Selection and Data Sources:
The study uses a simplified trapezoidal-shaped distribution of the solar energy flux density and assumes an average optical concentration ratio of the hybrid system to be 1000 suns.
3:List of Experimental Equipment and Materials:
The hybrid system consists of a heliostat field, a circular flat solar receiver, and an ORC subsystem. The solar thermal receiver consists of circular tubes with a solar selective coating.
4:Experimental Procedures and Operational Workflow:
The dynamic model is self-programmed using MATLAB software, with assumptions including constant saturation temperature of R134a and fixed working pressure in the cooling subsystem.
5:Data Analysis Methods:
The study examines the effects of solar radiation saltation and linear variations on the system's dynamic performance, including the response time and thermal stability.
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