THERMAL ANALYSIS AND EFFICIENCY OPTIMIZATION OF OTTO-STIRLING COMBINED CYCLES WITH SI ENGINE EXHAUST HEAT RECOVERY

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BATOOEI ALIREZA; KESHAVARZ VALIAN ALI

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Journal: Modares Mechanical Engineering Year:2016 | Volume:16 | Issue:2 Page(s): 147-158

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Title

THERMAL ANALYSIS AND EFFICIENCY OPTIMIZATION OF OTTO-STIRLING COMBINED CYCLES WITH SI ENGINE EXHAUST HEAT RECOVERY

Author(s)

BATOOEI ALIREZA | KESHAVARZ VALIAN ALI | Issue Writer Certificate

Keywords

HEAT RECOVERYQ2

COMBINED CYCLEQ2

STIRLING ENGINEQ2

SI ENGINEQ2

THERMAL EFFICIENCYQ1

Abstract

A STIRLING ENGINE cycle is combined with a Spark Ignition (SI) engine cycle to recover the SI ENGINE exhaust gas waste heat. One dimensional combustion simulation code is prepared for Spark Ignition type engine (M355G) simulation. The accuracy of numerical simulated results were validated with M355G experimentally. The experimental generated power and exhaust gas temperature vary in the range of 84.1- 176.7 kW and 610-710, respectively. The 1D code estimates the generated power with maximum 5.9% error and average exhaust gas temperature with 3.8% error in the operating range of the engine. Thermal analysis was done, and the results show that about 25% of input energy transfers by the exhaust gas are waste. The results indicate that, by installing a STIRLING ENGINE heater on the exhaust pipe of the SI ENGINE about 8.4 kW of the waste heat can be recovered in the best condition. The simulation of Alpha-type STIRLING ENGINE was done by GT-Suit program and the Solo V161 experimental results were used for the validation. According to 9% error in generated power calculation for validation, the new STIRLING ENGINE is suggested for installation in exhaust pipe. The generated power and THERMAL EFFICIENCY were estimated for STIRLING ENGINE in various exhaust gas temperature which occurred in various SI ENGINE working conditions. The coupled engines heat balance showed that the THERMAL EFFICIENCY is about 2-3% more than the ordinary one.

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APA: Copy

BATOOEI, ALIREZA, & KESHAVARZ VALIAN, ALI. (2016). THERMAL ANALYSIS AND EFFICIENCY OPTIMIZATION OF OTTO-STIRLING COMBINED CYCLES WITH SI ENGINE EXHAUST HEAT RECOVERY. MODARES MECHANICAL ENGINEERING, 16(2), 147-158. SID. https://sid.ir/paper/178841/en

Vancouver: Copy

BATOOEI ALIREZA, KESHAVARZ VALIAN ALI. THERMAL ANALYSIS AND EFFICIENCY OPTIMIZATION OF OTTO-STIRLING COMBINED CYCLES WITH SI ENGINE EXHAUST HEAT RECOVERY. MODARES MECHANICAL ENGINEERING[Internet]. 2016;16(2):147-158. Available from: https://sid.ir/paper/178841/en

IEEE: Copy

ALIREZA BATOOEI, and ALI KESHAVARZ VALIAN, “THERMAL ANALYSIS AND EFFICIENCY OPTIMIZATION OF OTTO-STIRLING COMBINED CYCLES WITH SI ENGINE EXHAUST HEAT RECOVERY,” MODARES MECHANICAL ENGINEERING, vol. 16, no. 2, pp. 147–158, 2016, [Online]. Available: https://sid.ir/paper/178841/en

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