Abstract: Aiming at the passive temperature control problem in confined spaces, we investigate the heat transfer and thermodynamic characteristics of module type ice temperature control process with mathematical models and experiments. A model for phase transition refrigeration by cool storage module is established, and with the mathematical expression for wall heat transfer coefficient, effective cooling time and cooling rate are derived. The relative error between the theoretical effective cooling time and experimental one is less than 5%. The results indicate that the wall heat transfer coefficient and cooling rate are proportional to environment temperature and relative moisture, and inversely proportional to cooling time. The correction factor equation for environment temperature and moisture is established and utilized for revising the mathematical models of storage module cooling rate and effective cooling time. These results provide important reference to the application of passive phase-transition refrigeration in confined space.

Key words: confined space, temperature control by ice storage, phase change, heat transfer, thermodynamics

摘要： 针对密闭空间内无源控温问题，通过数学建模和实验验证对模块式冰蓄冷控温传热过程及热力学特性展开研究。从冰蓄冷相变制冷理论入手，建立了蓄冷模块相变制冷数学模型，得到了蓄冷模块壁面综合传热系数、有效制冷时间以及制冷率的数学表达式，通过实验验证该模型的有效制冷时间理论值和实验值相对误差在5%以内。绘制了环境温度和相对湿度对蓄冷模块壁面综合传热系数、有效制冷时间及制冷率的影响关系曲线，表明环境温湿度与壁面综合传热系数和制冷率呈正比例变化关系；与有效制冷时间呈反比例变化关系。建立了环境温湿度相关修正系数方程，并运用该方程对蓄冷模块制冷率和有效制冷时间的数学模型进行了修正。研究结果为密闭环境中无源相变制冷的应用提供了技术依据。

关键词: 密闭空间, 冰蓄冷控温, 相变, 传热, 热力学