热管式蓄冷器的设计与热动力学分析

Design and Thermodynamic Analysis of Heat Pipe Regenerator

为强化相变蓄冷材料传热,将脉动热管技术与相变蓄冷技术相结合,设计一套脉动热管相变蓄冷装置。采用脉动热管可强化传热,提高形核率,加快结晶速率,减少蓄冷时间。该装置将脉动热管蓄冷装置与相变材料相耦合,使脉动热管相变蓄冷器的传热得到强化。相变蓄冷系统的蓄放冷性能与相变材料的相变过程、传热方式密切相关,本研究对脉动热管传热机理进行探析,建立了精确、通用性较高的理论模型,揭示了传热机理,为脉动热管蓄冷装置的模拟和实验提供指导。

In order to strengthen the heat transfer of the phase change cold storage material, a set of pulsating heat pipe phase change cold storage device was designed by combining the pulsating heat pipe technology with the phase change cold storage technology. According to the theory of phase transition kinetics, the nucleation rate is related to temperature. When the temperature is high, the activation energy required for diffusion is small, and the atoms are easily diffused, while the degree of undercooling is small and the nucleation rate is high. The use of pulsating heat pipes can enhance heat transfer, increase nucleation rate, accelerate crystallization rate, and reduce cold storage time. The device couples the pulsating heat pipe cold storage device with the phase change material to enhance heat transfer of the pulsating heat pipe phase change regenerator. The pulsating heat pipe phase change regenerator designed by this research institute was mainly composed of three parts: cold charging zone, cold storage zone and cooling zone. The phase change material filled in the cold storage tank was decyl alcohol and lauryl alcohol binary composite phase change cold storage material. The working medium filled in the heat pipe was R22. The storage and cooling performance of the phase change cold storage system is closely related to the phase change process and heat transfer mode of the phase change material. Therefore, this study researches the heat transfer mechanism of the pulsating heat pipe and establishes a theoretical model with high accuracy and versatility, revealing the heat transfer mechanism provides a certain guiding significance for the simulation and experiment of the pulsating heat pipe cold storage device.