Journal of Energy in Southern Africa
versión On-line ISSN 2413-3051
versión impresa ISSN 1021-447X
BATAINEH, Khaled M. Optimization analysis of solar-powered average temperature Stirling heat engine. J. energy South. Afr. [online]. 2015, vol.26, n.1, pp.55-66. ISSN 2413-3051.
This paper investigates the performance of the solar powered dish-Stirling engine using the non-linearized heat loss model of the solar dish collector and the irreversible cycle model of the Stirling engine. Finite time thermodynamic analysis is used to investigate the influence of the finite-rate heat transfer, operating temperatures, heat leak coefficient, and ratio of volume during regeneration processes, regenerator losses, thermal bridges losses on the maximum power output and the corresponding overall efficiency. The maximum overall system efficiency is 32% corresponding to absorber temperature and concentrating ratio of 850 K and 1300, respectively. The present analysis provides the basis for the design of a solar-powered mean temperature differential Stirling engine powered by solar dish system.
Palabras clave : Stirling engines; finite time thermodynamic; thermal losses; performance; regenerator effectiveness; numerical simulations.