| 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 m3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。 |
| 关键词: 冷库 热负荷 低温制冷机 斯特林循环 |
| DOI： |
| Received:August 25, 2022Revised:October 14, 2022 |
| 基金项目:国家“十三五”重点研发项目课题（2019YFD0901604）资助。 |
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| Research on Stirling-type Low-Temperature Cold Storage at -80 ℃ |
|
Zhang Ankuo1,2, Wu Ming1, Feng Yinglong1, Yu Wenhui2, Xiong Chao2, Xie Jing1
|
| (1.College of Food Science and Technology, Shanghai Ocean University;2.Shanghai Chaolian Technology Co., Ltd.) |
| Abstract: |
| 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 1500 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. |
| Key words: cold storage heat load cryogenic refrigerating machine Stirling cycle |
