THERMAL SCIENCE

International Scientific Journal

Arjun Sharma

,

Shailendra Kumar Shukla

,

Ajeet Kumar Rai

FINITE TIME THERMODYNAMIC ANALYSIS AND OPTIMIZATION OF SOLAR-DISH STIRLING HEAT ENGINE WITH REGENERATIVE LOSSES

ABSTRACT
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.
KEYWORDS
solar parabolic dish collector, solar-driven stirling engine, finite-rate heat transfer, exergy efficiency of dish system.
PAPER SUBMITTED: 2011-04-18
PAPER REVISED: 2011-09-15
PAPER ACCEPTED: 2011-09-16
DOI REFERENCE: https://doi.org/10.2298/TSCI110418101S
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2011, VOLUME 15, ISSUE Issue 4, PAGES [995 - 1009]
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Finite time thermodynamic analysis and optimization of solar-dish Stirling heat engine with regenerative losses

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence