Promising technologies of the 21st century: liquid nitrogen as an environmentally friendly refrigerant
- 作者: Kirillov N.G.1,2
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隶属关系:
- KA them. A.F. Mozhaisky
- LLC "IITs" Stirling Technologies "
- 期: 卷 93, 编号 1 (2004)
- 页面: 16-19
- 栏目: Articles
- URL: https://journal-vniispk.ru/0023-124X/article/view/100642
- DOI: https://doi.org/10.17816/RF100642
- ID: 100642
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A possibility of use of low-temperature Stirling machines (KGM) for development of nitrogen cooling closed systems which are the alternative to straight-flow nitrogen systems is considered. The advantages of closed systems based on KGM Stirling are their independence, long operation time, low weight and dimensions. These systems can be used for thermostatting of the objects, for elimination of losses during storage of oil products and cryogenic liquids, in construction for production of high- quality concrete.
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N. Kirillov
KA them. A.F. Mozhaisky; LLC "IITs" Stirling Technologies "
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Rice. Fig. 1. Autonomous closed system of nitrogen cooling for temperature control of objects with simultaneous generation of electricity: nitrogen circuit: 1 — container with liquid nitrogen; 2 - submersible centrifugal pump; 3 - heat-insulated cooled volume; 4 - air-cooling panel; 5 - high pressure expansion turbine; 6 - electric generator on the same shaft with the turbine; 7 - nitrogen heating heat exchanger; 8 - low pressure expansion turbine; 9 - electric generator; 10 - expansion tank; 11 - Stirling cryogenic refrigerator; 12 — KXM capacitor; 13 - KXM refrigerator; 14 - Dewar vessel; 15 - high pressure pump; 16 - check valve. Cooling circuit of the cryogenic machine: 17 - pump; 18 - heat exchanger; 19 - pipelines
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3.
Rice. 2. Installation for long-term storage of cryogenic liquids based on a nitrogen screen: 1 - Stirling cryogenic machine; 2 - vessel with liquid nitrogen; 3 - cryogenic liquid; 4 - line of liquid nitrogen; 5 - check valve; 6 - line of gaseous nitrogen; 7 - intake device; 8 - safety valve; 9 - throttle valve; 10 - Stirling cryogenic machine condenser
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4.
Rice. 3. Cryogenic complex for the production of high-quality cement: 1 - Stirling cryogenic machine (CGM); 2 - capacitor KGM; 3 - container for storing liquid nitrogen; 4 - liquid nitrogen drain line; 5 - liquid nitrogen supply line; 6 - high pressure pump; 7 - grinding cryostat; 8 - drive roller of a cryogenic mill; 9 - electric motor; 10 - line for supplying liquid nitrogen vapor from the cryostat; 11 - mechanical filter; 12 - throttle valve; 13 - branch pipe for periodic connection of the cryostat with the liquid nitrogen supply line; 14 - branch pipe for periodic connection of the cryostat with the line for supplying liquid nitrogen vapor; 15 - hole with a removable cover; 16, 17 - shut-off valves
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