| 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，而目前该温区低温冷库多为传统的复叠式制冷方式，为此设计了一个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，设计了一台容积8立方米-80℃低温冷库，分析了低温冷库的结构特点，研究了VIP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本设计方案的可行性，单台斯特林制冷机在200W输入功空载条件下不到10分钟制冷温度可达-80℃，50分钟后最低制冷温度稳定在-160℃左右，在500W输入功下具有180W制冷量，对应COP为0.36。该研究成果对于未来高性能-80 ℃及以下超低温冷库的研究具有一定的参考价值。 |
| 关键词: 冷库 热负荷 低温制冷机 斯特林循环 |
| DOI： |
| 投稿时间：2022-08-25 修订日期：2022-10-14
录用日期：2022-11-04 |
| 基金项目:国家“十三五”重点研发项目课题(2019YFD0901604) |
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| Research on Stirling-type Low-Temperature Cold Storage at -80℃ |
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| Abstract: |
| The applications of -80℃ low-temperature cold storage in blood stations, hospitals and medical research institutions are increasing. At present, low-temperature cold storage in this temperature mostly uses traditional cascade refrigeration. In this paper, Stirling refrigeration is adopted to cool a -80℃ low-temperature cold storage. Stirling refrigerator has high efficiency performance at low temperature, and a low temperature cold storage with a volume of 1500 liters at -80 ℃ was designed. The structural characteristics of low temperature cold storage are analyzed, and VIP and polyurethane are also studied. The foam layer is composed of a composite insulating layer structure. The calculation methods of heat load of the low temperature cold storage are given. Based on the experimental performance of a Stirling refrigerator developed, the feasibility of the design scheme is verified, a single Stirling refrigerator can reach a cooling temperature of -80°C in less than 10 minutes under no-load conditions with 200W input power and the minimum cooling temperature is stable at around -160°C after 50 minutes, and has a cooling capacity of 180W at 500 W input power, corresponding to a COP of 0.36. The research has certain reference value on future ultra-low temperature cold storage with high performance at -80 ℃ or below. |
| Key words: cold storage heat load cryogenic refrigerating machine Stirling cycle |
