He refrigerator: Difference between revisions
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The main flow of the He gas is shown on the above diagram. The room temperature He gas from a compressor started from the left. It passes through the '''main heat exchanger''' (E30, E31, E32, E33, and E34) to cool it down to ?? temperature and ?? pressure. A '''precooler''' (E81) or '''boiler''' (E83) can be used with liquid nitrogen. The He gas can be purified using the '''expansion engine charcoal adsorbers''' (E36A, E36B, E38). The He gas is liquified using the '''Joule-Thomson valve''' (JT-V307). | The main flow of the He gas is shown on the above diagram. The room temperature He gas (~17.2 bar) from a compressor started from the left. It passes through the '''main heat exchanger''' (E30, E31, E32, E33, and E34) to cool it down to ?? temperature and ?? pressure. A '''precooler''' (E81) or '''boiler''' (E83) can be used with liquid nitrogen. The He gas can be purified using the '''expansion engine charcoal adsorbers''' (E36A, E36B, E38). The He gas is liquified using the '''Joule-Thomson valve''' (JT-V307). | ||
The return He gas, which is still cold enough, also flow through the main heat exchanger to provide cooling for the room temperature He gas. After that, the return He gas will go back to the He compressor at the end. | The return He gas, which is still cold enough, also flow through the main heat exchanger to provide cooling for the room temperature He gas. After that, the return He gas will go back to the He compressor at the end. | ||
Revision as of 17:01, 14 July 2022
Introduction
The He refrigerator, or liquefied, Model 1630S from the Cryogenic Plants and Services, Linde BOC Procee Plants LLC. This model operates on an analog system and has been upgraded so that a computer can control it.
The model is used to produce liquid He as a close cycle 4.6 K refrigerator. It has a purification system for recycling the air-contaminated He gas.
He refrigerator Operator manual
Operation principle
The main flow of the He gas is shown on the above diagram. The room temperature He gas (~17.2 bar) from a compressor started from the left. It passes through the main heat exchanger (E30, E31, E32, E33, and E34) to cool it down to ?? temperature and ?? pressure. A precooler (E81) or boiler (E83) can be used with liquid nitrogen. The He gas can be purified using the expansion engine charcoal adsorbers (E36A, E36B, E38). The He gas is liquified using the Joule-Thomson valve (JT-V307).
The return He gas, which is still cold enough, also flow through the main heat exchanger to provide cooling for the room temperature He gas. After that, the return He gas will go back to the He compressor at the end.