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Air cycle refrigerating/cooling system and turbine unit used therefor

An air circulation and cooling system technology, applied in the direction of refrigerators, refrigeration and liquefaction, compressors, etc., can solve problems such as contact, and achieve the effect of high reliability and simple scheme

Inactive Publication Date: 2008-08-13
NTN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of magnetic bearings, there is also a contact problem when the power supply is stopped

Method used

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  • Air cycle refrigerating/cooling system and turbine unit used therefor
  • Air cycle refrigerating/cooling system and turbine unit used therefor
  • Air cycle refrigerating/cooling system and turbine unit used therefor

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Embodiment Construction

[0051] A first embodiment of the present invention will be described with reference to FIGS. 1 and 2 . FIG. 1 is a schematic view showing the overall air circulation refrigeration system. This air circulation refrigerating and cooling system is a system that directly cools air in a space to be cooled 10 such as a freezer as a refrigerant, and has an air circulation system that extends from an air inlet 1a opened in the space to be cooled 10 to an air outlet 1b. Access 1. In this air circulation passage 1, a pre-compression mechanism 2, a first heat exchanger 3, a dehumidifier 4, a compressor 6 of a steam turbine assembly 5 for air circulation refrigeration and cooling, a second heat exchanger 8, and an intermediate heat exchanger are arranged in this order. 9. The expansion steam turbine 7 associated with the steam turbine assembly 5 above. The intermediate heat exchanger 9 is inside the above-mentioned air circulation passage 1, and performs heat exchange between the inflow...

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Abstract

The invention relates to an air circulation refrigeration cooling system and a steam turbine assembly used therein. In this system, the gap between each impeller in the steam turbine assembly and the casing can be kept small, stable high-speed rotation can be obtained, and the long-term durability of the bearing supporting the main shaft in the steam turbine assembly can be improved and the life can be extended. In the air cycle refrigeration cooling system, the inflow air is controlled, compressed by the compressor (6) in the steam turbine assembly (5), and thermally adiabatically expanded by the expansion turbine (7) in the steam turbine assembly (5). In the steam turbine assembly (5), the compressor impeller (6a) of the compressor (6) and the steam turbine impeller (7a) of the expansion turbine (7) are installed on a common main shaft (13), and are connected by bearings (15, 16) The main shaft (13) is rotatably supported, and part or all of the thrust acting on the main shaft (13) is received by the electromagnet (17).

Description

technical field [0001] The invention relates to an air circulation refrigeration system and a steam turbine assembly for air circulation refrigeration of the system, which uses air as a refrigerant and is used for refrigeration warehouses, low-temperature rooms below zero, air conditioners and the like. Background technique [0002] When air is used as the refrigerant, environmental protection and safety are better than when fluorine, ammonia, etc. are used, but it is insufficient in terms of energy efficiency. However, when it is used in a facility where the air constituting the refrigerant can be directly blown in like a refrigerated warehouse, the total cost can be reduced to the same level as the existing system by taking measures to omit the fan and defroster in the warehouse. possibility. At present, the use of fluorine as a refrigerant has been restricted from an environmental point of view, and even if other refrigerant gases are used, it is desired to avoid it as m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B9/00F16C32/04F25B9/06
Inventor 中关嗣人尾崎孝美山田裕之梅津义英
Owner NTN CORP
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