Analysis and research on the cyclic performance of generalized quantum stirling heat engines
SHI Qinhong
YIN Yong
FANG Xinting
YIN Bojin
Abstract：Based on the theories of finite-time thermodynamics and quantum thermodynamics,using particles in the generalized potential well as the working medium,the expressions of performance parameters such as dimensionless work,dimensionless power,efficiency,and effective power of the generalized quantum stirling cycle are derived.The influence of the potential well width ratio and heat leakage coefficient on different performance parameters is analyzed,and the optimal performance of the cycle is studied.The results show that the relationship between dimensionless power and effective power and efficiency is in the shape of a twisted blade returning to the origin.Under the same heat leakage coefficient,when the potential well parameters are σ=2,θ=2,the dimensionless power and efficiency of the particles are the greatest.When the effective power reaches its maximum value,the corresponding efficiency value is 6.92%higher than that at the maximum dimensionless power.When the effective power is the optimization objective,higher efficiency can be achieved while taking into account both power and efficiency.
Keywords：quantum thermal enginefinite-time thermodynamicsgeneralized particlethermal efficiency
Publication Date：2025-09-25
Online Publishing Date：2025-11-10(First online date of this platform, not the publication date of the document)
Pages：5( 78-82 )