Performance comparative analyses for an endoreversible Otto cycle at maximum ecological efficient power
Based on the finite time thermodynamics and the endoreversible Otto cycle model,this paper introduces ecological efficient power into the performance optimization of the Otto cycle,and studies the cycle performance under the maximum ecological efficient power.The relationships among the ecological efficient power and compression ratio,power and efficiency are derived by detailed numerical examples,and the effects of the maximum temperature ratio and heat transfer loss on the ecological efficient power performance are analyzed.The cycle performance indicators which include the power,efficiency,efficient power and entropy generation rate under the maximum ecological efficient power,the maximum power,the maximum efficiency,the maximum efficient power and the maximum ecological function are compared.The results show that the characteristic curve of the ecological efficient power versus compression ratio is parabolic-like one,the characteristic curve of the ecological efficient power versus efficiency are loop-shaped one.When the heat transfer loss increases,the maximum ecological efficient power and the corresponding optimal compression ratio and efficiency decrease,while the power corresponding to the maximum ecological efficient power increases.When the maximum temperature ratio increases,the maximum ecological efficient power and the corresponding optimal compression ratio,power and efficiency increase.Compared with other characteristic criteria,the maximum ecological efficient power criteria can better reflect the compromise among the power,efficiency and entropy generation rate.
endoreversible Otto cycleecological efficient powerfinite time thermodynamicsoptimal performance
国家科技期刊平台
NSTL
万方数据
