Subjects: Dynamic and Electric Engineering >> Engineering Thermophysics submitted time 2017-11-07 Cooperative journals: 《工程热物理学报》
Abstract: An irreversible quantum Stirling refrigeration model is established in which working substance is a single particle contained in a one-dimensional infinite potential well, and the system consists of countless replicas. The occupation probabilities in each eigenstates of the particle are expressed by the thermal equilibrium Gibbs distributions. The cycle is made of two iso-energy branches and two isochoric branches and with heat leakage between heat reservoirs and imperfect regeneration. Analytical expressions of COP, cooling rate, entropy generation rate and ecological function are derived. The curve between cooling rate and ecological function is a loop-shaped one. Effects of heat leakage and imperfect regeneration on COP, cooling rate and ecological function are analyzed.
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. submitted time 2018-01-05 Cooperative journals: 《工程热物理学报》
Abstract:建立了以无数个无限深势阱中的粒子为工质的不可逆量子斯特林致冷循环模型。势阱中粒子在能级上的分布由吉布斯分布函数决定。该致冷循环由两个等能量过程与两个等势阱壁宽度过程组成,具有高低温热源间的热漏和不完全回热因素。导出了性能系数、致冷率、熵产率和生态学目标函数性能解析式,制冷率与生态学函数的关系曲线是回原点的扭叶型。分析了热漏系数与不完全回热因子对性能系数、致冷率和生态学函数的影响。