Abstract
The technique of solar dish and Stirling engine combination is the most challenging and promising one. For the efficient conversion of the externally concentrated heat to the usable power, we studied the influences of the wall temperature, inclination angle, and open area ratio of the receiver on the Stirling engine power and efficiency. The theoretical analysis of the heat exchange element of the solar Stirling engine was performed, and the simulation model of the cavity absorber was built and analyzed. The temperature cloud and heat loss trends of the receiver under different wall temperatures, inclination angles, and opening ratios were illustrated. When the wall temperature of the absorber changes from 700 to 1000 K, the efficiency of the engine has increased by 8.8% from 21.34% to 30.11%. The higher the temperature, the higher the efficiency. As the inclination angle of the absorber increases from 0° to 60°, the efficiency of the engine is increased by 7.7% from 21.1% to 28.8%. With the increases of the aperture ratio, the engine output and efficiency reduced. The engine efficiency at the aperture ratio of 0.5 is 4% larger than that at the aperture ratio of 1.
Highlights
Energy is the cornerstone of human society and the driving force for its development
The results showed that under some wind conditions, the combined convective heat loss may be reduced below the natural convection value, and there was a critical wind speed to minimize the combined convective heat loss [20]
The absorber is placed at the focal point of the solar collector, and it absorbs the solar heat collected in the focus
Summary
Energy is the cornerstone of human society and the driving force for its development. Facing the challenge of depletion of fossil fuel energy, countries in the world have been paying close attention to the new energy source development in recent years [1,2,3,4,5]. The green power, such as the solar power, its generation development has become a great interest in its significant potential for several countries [6]. Its tropic photoelectric conversion can reach up to 30%, but tower type is about 10% only [11,12,13] Overall, it is commercially prospective for its cost effectiveness
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
