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Efficient pre-cooling and liquefying system coupled with expansion mechanism and regenerative refrigerator

An expansion mechanism, regenerative technology, applied in refrigeration and liquefaction, refrigerator, liquefaction and other directions, can solve problems such as reducing pre-cooling efficiency, and achieve the effect of improving pre-cooling efficiency, promoting large-scale application, and improving liquefaction efficiency

Pending Publication Date: 2022-04-15
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the specific heat capacity of the gas working medium changes with the pressure, the specific heat capacity of the two fluids does not match, resulting in the need for more direct flow to cool the gas to be pre-cooled, reducing the pre-cooling efficiency

Method used

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  • Efficient pre-cooling and liquefying system coupled with expansion mechanism and regenerative refrigerator
  • Efficient pre-cooling and liquefying system coupled with expansion mechanism and regenerative refrigerator
  • Efficient pre-cooling and liquefying system coupled with expansion mechanism and regenerative refrigerator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] like figure 1 As shown, the high-efficiency precooling and liquefaction system coupled with an expansion mechanism and a regenerative refrigerator in this embodiment includes a two-stage GM refrigerator module, an expansion and compression module, and a liquefaction module.

[0077]The secondary GM chiller module consists of a recuperative chiller unit and a DC external circulation unit. The regenerative refrigerator unit includes compression device 1, compressor low-pressure gas storage tank 2, compressor cooler and filter device 3, compressor high-pressure gas storage tank 4, GM type compressor high and low pressure gas distribution valve 5, refrigerator inlet Air channel 6, refrigerator cylinder 7, first-stage expansion piston 11, first-stage regenerator 8, first-stage expansion piston sealing mechanism 9, gap 10 between first-stage expansion piston and cylinder, second-stage expansion piston 27 , the second-stage regenerator 26, the first-stage cold end heat exchan...

Embodiment 2

[0083] Cryogenic storage system cooled with novel regenerative refrigerator

[0084] like figure 2 As shown, the high-efficiency pre-cooling system coupled with the expansion mechanism and the regenerative refrigerator in this embodiment includes a two-stage GM refrigerator module and an expansion and compression module.

[0085] The secondary GM chiller module consists of a recuperative chiller unit and a DC external circulation unit. The regenerative refrigerator unit includes compression device 1, compressor low-pressure gas storage tank 2, compressor cooler and filter device 3, compressor high-pressure gas storage tank 4, GM type compressor high and low pressure gas distribution valve 5, refrigerator inlet Air channel 6, refrigerator cylinder 7, first-stage expansion piston 11, first-stage regenerator 8, first-stage expansion piston sealing mechanism 9, gap 10 between first-stage expansion piston and cylinder, second-stage expansion piston 27 , the second-stage regenera...

Embodiment 3

[0090] like image 3 As shown, the high-efficiency precooling system coupled with an expansion mechanism and a regenerative refrigerator in this embodiment includes a single-stage Stirling refrigerator module, an expansion and compression module, and a liquid precooling module.

[0091] The single-stage Stirling chiller module consists of a recuperative chiller unit and a DC external circulation unit. The regenerative refrigerator unit includes a piston compression device 1, a compressor cooler 3, a refrigerator air intake passage 6, a refrigerator cylinder 7, a first-stage expansion piston 11, a first-stage regenerator 8, and a first-stage expansion Piston sealing mechanism 9 , gap 10 between first stage expansion piston and cylinder, first stage cold end heat exchanger 12 , first stage expansion cavity 13 . The direct current external circulation unit includes a direct current 28 and a direct current control valve 20 .

[0092] The expansion and compression module includes...

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Abstract

The invention relates to an efficient pre-cooling and liquefying system of a coupling expansion mechanism and a regenerative refrigerating machine. The efficient pre-cooling and liquefying system comprises a regenerative refrigerating module, an expansion and compression module and a pre-cooling and liquefying module. The regenerative refrigeration module comprises a regenerative refrigerator unit and a direct-current external circulation unit; the regenerative refrigerator unit comprises a compressor device, a regenerator and a cold end heat exchanger which are connected in sequence; in the direct-current external circulation unit, direct current is led out of the refrigerator unit from any position, passes through a plurality of channels and then returns to the heat regenerator, and direct-current circulation is completed. And a direct-current control valve is arranged in the direct-current external circulation unit so as to control the direct-current flow. Compared with the prior art, the direct current led out is subjected to expansion depressurization, the expansion refrigeration effect is improved, the pressure similar to that of the to-be-precooled material is obtained, the specific heat capacity of the to-be-precooled material is similar, more to-be-precooled materials can be precooled and liquefied through the equivalent led-out direct current, and therefore the precooling and liquefying efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to an efficient precooling and liquefaction system coupled with an expansion mechanism and a regenerative refrigerator. Background technique [0002] The regenerative refrigerator is a refrigeration technology in the form of alternating flow. The regenerator is used to realize the periodic heat storage and release between the gas working medium and the regenerative packing, and the expansion of the gas is used to produce a refrigeration effect. The regenerator generally has a large specific surface area per unit volume, and its structural form includes wire mesh, pellet packing, gap type, etc. [0003] Direct current means that the air quality of forward flow and reverse flow in a certain section is not equal in a period, and the net mass flow flowing in one direction appears. Direct current is also called direct current circulating mass flow. [0004] Regenerative cryogenic ...

Claims

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Application Information

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IPC IPC(8): F25B9/06F25B40/06F25J1/02
Inventor 曹强王苗苗陈超杰
Owner TONGJI UNIV
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