乙二醇蓄冷库的设计和性能

Design and Performance of Cold Storage with Ethylene Glycol as Refrigerant

为探讨乙二醇作为蓄冷剂的蓄冷库用于果蔬贮藏保鲜的可行性,研究人员设计了包含制冷循环系统、蓄冷剂循环系统和保鲜库制冷系统三个循环的乙二醇蓄冷库。按照国家标准冷库热工性能试验方法对研制的蓄冷库的围护结构传热系数、冷风机制冷量、耗电量和库内温度波动等冷库性能进行了分析,结果表明,研制的乙二醇蓄冷库,围护结构传热系数为0.20 W/(m2·℃),冷风机制冷量5.4 kW,耗电量35.48 kW·h·d-1,库内温度不均匀性2.8℃,平均温度波动±1.0℃,达到了果蔬贮藏保鲜设施的技术要求。

In order to discuss the feasibility of cold storage with ethylene glycol as refrigerant for the storage and preservation of fruit and vegetable, an ethylene glycol cold storage with three circulation systems including compressor refrigeration system, phase-changed material cycle system and fresh keeping storage refrigeration system was designed. The cold store performances, such as building envelope heat transfer coefficient, cooling capacity of the air cooler, power consumption and internal temperature fluctuation of cold storage, were analyzed using national standard testing methods for thermal performance of cold storage. The results showed that, the building envelope heat transfer coefficient was 0.20 W/(m2·℃), cooling capacity of the air cooler was 5.4 kW, power consumption was35.48 kW·h·d-1, internal temperature nonuniformity of cold storage was 2.8 ℃, and the average temperature fluctuation value was ±1.0 ℃, which could reach the technical requirements for fresh-keeping facilities of fruit and vegetable.