FINITE TIME THERMODYNAMIC ANALYSIS AND OPTIMIZATION OF SOLARDISH 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

Dates

  • Submission Date2011-04-18
  • Revision Date2011-09-15
  • Acceptance Date2011-09-16

DOI Reference

10.2298/TSCI1104181015S

References

  1. Curzon F.L., Ahlborn B. Efficiency of Carnot heat engine at maximum power output. Am J Phys 43 (1975) pp 22-4.
  2. Mancini Thomas, Heller Peter. Dish-Stirling systems: an overview of developmentand status[J]. J Solar Energy Eng 125 (2003), pp135-51.
  3. Wu F, Chen L, Wu C, Sun F. Optimum performance of irreversible Stirling engine with imperfect regeneration. Energy Conversion and Management, 39 (1998), vol.8 pp727-732
  4. Wu F, Chen L, Sun F, Wu C, Zhu Y. Performance and optimization criteria of forward and reverse quantum Stirling cycles. Energy Conversion and Management, 39 (1998), vol.8 pp733-739
  5. Chen Jincan, Yan Zijun, Chen Lixuan, Andresen Biarne. Efficiency bound of a solar-driven Stirling heat engine system. Int J. Energy Res 22 (1998) pp805-12.
  6. Costea M, Petrescu S, Harman C. The effect of irreversibilities on solar Stirlingengine cycle performance. Energy Convers Manage 40 (1999), pp 1723-31.
  7. Kaushik SC, Kumar S. Finite time thermodynamic evaluation of irreversible ericsson and Stirling heat engines. Energy Convers Manage 42 (2001), pp 295-312.
  8. Sahin Ahmet Z. Finite-time thermodynamic analysis of a solar driven heatengine.ExergyInt 2, (2002) pp122- 126.
  9. Durmayaz Ahmet, SalimSogutOguz, SahinBahri, YavuzHasbi. Optimization of thermal systems based on finitetime thermodynamics and thermoeconomics . Prog Energy Combust Sci 30 (2004), pp175-271.
  10. Thombare DG, Verma SK. Technological development in the Stirling cycleengines. Renew Sustain Energy Rev 12 (2008) pp1-38.
  11. TliliIskander, Timoumi Youssef, Ben NasrallahSassi. Analysis and designconsideration of mean temperature differential Stirling engine for solarapplication. Renew Energy 33 (2008) vol. 3 , pp1911-21.
  12. Wu F, Chen LG, Sun FR, et al. Performance optimization of Stirling engine and cooler based on finite-time thermodynamic. Beijing: Chemical Industry Press (2008) pp 59.
  13. YaqiLi ,Yaling He, Weiwei Wang. Optimization of solar-powered Stirling heat engine with finite-time thermodynamics. Renew Energy (2010)10, pp 2-4
  14. Chen L, Li J, Sun F. Optimal temperatures and maximum power output of a complex system with linear phenomenological heat transfer law. Thermal Science, 13 (2009) vol.4, pp 33-40.
  15. Li J, Chen L, Sun F. Maximum work output of multistage continuous Carnot heat engine system with finite reservoirs of thermal capacity and radiation between heat source and working fluid. Thermal Science, 14 (2010), vol.1, pp 1-9.
Volume 15, Issue 4, Pages995 -1009