冷链基站蓄冷期气流组织模拟研究

Simulating of the air distribution in cold chain base station during cold storage period

为解决果蔬冷链初始端的冷藏保鲜问题,设计了一种基于自然能源运行的果蔬保鲜装置——冷链基站,基站以保鲜室工作为主,以分布式光伏发电和地源热泵作为能源系统,结合相变蓄能技术为保鲜室供冷。对冷链基站蓄冷期气流组织进行模拟,模拟内容为风口布置数量、送风速度及送风角度不同时,保鲜室相变层相变时间的差异。结果表明:三对风口布置,送风速度为4 m/s,且出风角度为-20°时,保鲜室内部换热效果较好,相变层蓄冷效果较好,相变层相变时间较短。该研究对于冷链基站蓄冷期的蓄冷效果有明显提升,为后期保鲜室的正常工作提供了有力保障。

In order to solve the problem of cold storage and freshness of fruits and vegetables at the initial end of the cold chain,a cold chain base station,which is a kind of fruit and vegetable freshkeeping device based on natural energy is designed.The base station mainly works in the freshkeeping room.The base station uses a distributed photovoltaic power generation system and a ground source heat pump as the energy system,and combines phase change energy storage to provide cooling for the fresh-keeping room.By simulating the air distribution during the cold storage period of the cold chain base station,the simulation content is the difference of the phase change time of the phase change layer in the fresh-keeping room when the number of air vents,the air supply speed and the air supply angle are differen.t The results show that when three pairs of air vents are arranged,the air supply speed is 4 m/s,and the air outlet angle is-20°,the heat exchange effect inside the freshkeeping room is better,the phase change layer has better cold storage effect,and the phase change time of the phase change layer is shorter.This research has significantly improved the cold storage effect of the cold chain base station during the cold storage period,provides a strong guarantee for the normal operation of the preservation room in the later stage.