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The present study investigates the performance of the solar-driven Stirling  engine system to maximize the power output and thermal efficiency 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 has been done for combined system to calculate the finite-rate heat  transfer, internal heat losses in the regenerator, conductive thermal  bridging losses and finite regeneration process time. The results indicate  that exergy efficiency of dish system increases as the effectiveness of  regenerator increases but decreases with increase in regenerative time  coefficient. It is also found that optimal range of collector temperature and  corresponding concentrating ratio are 1000 K~1400 K and 1100~1400,  respectively in order to get maximum value of exergy efficiency. It is  reported that the exergy efficiency of this dish system can reach the maximum  value when operating temperature and concentrating ratio are 1150 K and 1300,  respectively

Finite time thermodynamic analysis and optimization of solar-dish Stirling heat engine with regenerative losses