摘要
-80℃低温冷库在血站、医院以及医疗研究机构的应用越来越多,目前该温区低温冷库多为传统的复叠式制冷方式,本文设计了一座采用斯特林制冷方式的小型-80℃超低温冷库。基于斯特林制冷机低温效率高的优点,结合低温冷库和斯特林制冷机的特点,设计了一座容积为8 m^(3)的-80℃低温冷库,分析了低温冷库的结构特点,研究了真空绝热板和聚氨酯发泡层组成的复合绝热层结构,给出低温冷库漏热损失计算方法。基于冷库热负荷选配课题组研制的斯特林制冷机,开展实验研究并验证了设计方案的可行性,单台斯特林制冷机在200 W输入功空载条件下10 min以内制冷温度可达-80℃,50 min后最低制冷温度稳定在约-160℃,在500 W输入功下制冷量为180 W,对应COP为0.36。
The use of-80 ℃ low-temperature cold storage is increasing in blood stations,hospitals,and medical research institutions.Low-temperature cold storage primarily uses traditional cascade refrigeration systems.In this paper,Stirling refrigeration is used to cool a-80 ℃ low-temperature cold storage.The Stirling refrigerator provides high-efficiency performance at low temperatures;low-temperature cold storage with a volume of 1 500 L at-80 ℃ was designed.The structural characteristics of the low-temperature cold storage were analyzed,and the composite insulation layer with a vacuum insulation panel(VIP) and polyurethane was studied.Calculation methods for the heat load of low-temperature cold storage were presented.Based on the experimental performance of the Stirling refrigerator,the feasibility of the design scheme was verified.A single Stirling refrigerator can reach a cooling temperature of-80 ℃ in less than 10 min under no-load conditions with 200 W of input power;the minimum cooling temperature was stable at approximately-160 ℃ after 50 min,with a cooling capacity of 180 W with 500 W of input power,corresponding to a COP of 0.36.This research provides theoretical guidance for future ultra-low temperature cold storage with Stirling refrigerators.
作者
张安阔
吴明
冯英珑
余文辉
熊超
谢晶
Zhang Ankuo;Wu Ming;Feng Yinglong;Yu Wenhui;Xiong Chao;Xie Jing(College of Food Science and Technology,Shanghai Ocean University,Shanghai,201306,China;Shanghai Chaolian Technology Co.,Ltd.,Shanghai,200240,China)
出处
《制冷学报》
CAS
CSCD
北大核心
2023年第5期25-31,共7页
Journal of Refrigeration
基金
“十三五”国家重点研发计划(2019YFD0901604)资助项目。
关键词
冷库
热负荷
低温制冷机
斯特林循环
cold storage
heat load
cryogenic refrigerating machine
Stirling cycle
