Cold Cycle Dilution and Superfluid Joule-Thomson Refrigerator

冷循环稀释和超流体 Joule-Thomson 制冷机

• 批准号: 0000718
• 负责人: John Brisson
• 金额: $ 12.81万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-01 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0000718&HistoricalAwards=false
• 关键词: Cold; Cycle; Dilution; Superfluid; Joule

A new ultra low temperature refrigerator, the superfluid Joule-Thomson refrigerator (SJTR), will be developed. The SJTR is a single-phase refrigerator that can be used in zero gravity as well as terrestrial environments. It is projected to provide cooling to temperatures of 0.5 Kelvin (K). The SJTR uses a cold (~1 K) superleak-bypassed piston compressor to compress the 3He component of a 3He-4He liquid mixture . In the SJTR cycle, the compressed 3He is discharged by the compressor and passed through counterflow heat exchangers to a superleak bypassed throttle. The 3He component of the mixture cools as it passes through the throttle and the fluid is used to absorb heat from a thermal load. The 3He component is warmed back up to the compressor temperature by passing back through the counterflow heat exchanger. The 3He is then recompressed in the compressor where it continues back through the cycle. The project will include the development of the cold compressor and a demonstration of the superfluid Joule- Thomson concept.

将开发一种新型超低温制冷机，即超流体焦耳-汤姆逊制冷机（SJTR）。 SJTR 是一款单相制冷机，可在零重力和陆地环境中使用。 预计可将温度冷却至 0.5 开尔文 (K)。 SJTR 使用冷 (~1 K) 超泄漏旁路活塞压缩机来压缩 3He-4He 液体混合物中的 3He 成分。 在SJTR循环中，压缩的3He由压缩机排出，并通过逆流热交换器到达超级泄漏旁路节流阀。 混合物中的 3He 成分在通过节流阀时会冷却，并且流体用于吸收热负载的热量。 3He 组分通过逆流热交换器返回，被加热至压缩机温度。 然后 3He 在压缩机中被重新压缩，并继续循环。该项目将包括冷压缩机的开发和超流体焦耳-汤姆逊概念的演示。