On Performance Study of Solar Driven Heat Engine with Consideration to Internal Irreversibility and Power Density

Abstract- Finite time thermodynamic optimization with respect to maximum power density has been performed for a solar-driven heat engine with internal irreversibility. In this paper, it is considered that the heat transfer from the hot reservoir to the working fluid occurs in radiation mode and the heat transfer from working fluid to the cold reservoir occurs in the convection mode. The equation of power density function is formed, which is maximized for various design parameters. Further, the effects of these parameters on optimum power density is also investigated. Moreoever, the performance in the nominal power density output at operating conditions other than optimum working fluid temperatures has been studied with respect to the obtained efficiency. Keywords- Solar driven heat engine, performance analysis, internal irreversibility, power density, thermal efficiency. 1