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Ammonia volume control system based on gas-solid phase transition

A control system, gas-solid phase technology, applied in the direction of airbag arrangement, fixed tubular catheter assembly, compression machine with reversible cycle, etc., can solve the problems of low efficiency, heavy burden, bulky, etc.

Active Publication Date: 2021-02-12
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the stratosphere environment, the atmospheric pressure is low, generally only 2500-5500Pa, which is lower than the triple point pressure (6.1kPa) of ammonia gas. Under this pressure, ammonia gas cannot be liquefied
By pressurizing, the ammonia pressure is higher than 6.1kPa, and the gas-liquid phase change process of ammonia can be realized theoretically. The volume of the pressure equipment is huge, and it will bring a heavy burden to the stratospheric airship

Method used

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  • Ammonia volume control system based on gas-solid phase transition
  • Ammonia volume control system based on gas-solid phase transition
  • Ammonia volume control system based on gas-solid phase transition

Examples

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Effect test

Embodiment 1

[0033] see figure 1 , is an ammonia volume control system 100 based on gas-solid phase transition according to an embodiment of the present invention, including: an ammonia volume control unit 110 and a refrigeration cycle unit 120-a.

[0034] The ammonia volume control unit 110 includes a heat exchange module 111 and an ammonia air bag 112, the low-pressure ammonia gas is connected to the inlet of the heat exchange module 111 by the outlet of the ammonia air bag 112 through a connecting pipe, and the outlet of the heat exchange module 111 A pipeline is connected to the inlet of the ammonia gas bag 112 .

[0035] The ammonia volume control unit 110 provided by the present invention works in the following manner: if the amount of ammonia gas is reduced, the low-pressure ammonia gas enters the heat exchange module 111 from the ammonia gas bag 112 and becomes solid when it is cooled; if the amount of ammonia gas is increased , the solid ammonia in the heat exchange module 111 be...

Embodiment 2

[0046] see figure 2 , is an ammonia volume control system 101 based on gas-solid phase transition according to an embodiment of the present invention, including: an ammonia volume control unit 110 and a refrigeration cycle unit 120-b.

[0047] The ammonia volume control unit 110 includes a heat exchange module 111 and an ammonia air bag 112, the low-pressure ammonia gas is connected to the inlet of the heat exchange module 111 by the outlet of the ammonia air bag 112 through a connecting pipe, and the outlet of the heat exchange module 111 A pipe is connected to the inlet of the ammonia gas bag 112 .

[0048] The ammonia volume control unit 110 provided by the present invention works in the following manner: if the amount of ammonia gas is reduced, the low-pressure ammonia gas enters the heat exchange module 111 from the ammonia gas bag 112 and becomes solid when it is cooled; if the amount of ammonia gas is increased , the solid ammonia in the heat exchange module 111 becom...

Embodiment 3

[0059] see image 3 , is a schematic structural diagram of the ammonia volume control unit provided by an embodiment of the present invention.

[0060] The ammonia volume control unit 110 includes a heat exchange module 111 and an ammonia air bag 112, the heat exchange module includes an outer shell 111, an inner pipe 1112 arranged in the outer shell 1111, an inner pipe 1112 arranged in the outer shell 1111 and the inner pipe 1112 The fins 1113 between them and the connecting pipes 1114 and 1115 are formed.

[0061] In this embodiment, the outer shell 1111 is a combination of a cylindrical shape and a hemispherical shape, and the inner pipe 1112 is a cylindrical shape.

[0062] In this embodiment, the outer casing 1111 and the inner pipeline 1112 are respectively connected to the ammonia air bag 110 through a connecting pipeline 1114 (1115), and the low-pressure ammonia gas enters the heat exchange module 111 from the pipeline 1114 connected to the outer casing 1111 , and fl...

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Abstract

The ammonia volume control device based on the gas-solid phase transition provided by the present invention increases the cooling capacity through the optimized structure of the heat exchange equipment, so that the ammonia can be directly converted from the gas phase to the solid phase at low pressure, and solves the problem of air pollution caused by the atmosphere in the stratosphere environment. The pressure is lower than the triple point pressure of ammonia, which leads to the defect that ammonia cannot be liquefied, and through the selected refrigerant and optimized refrigeration process, it meets the high-efficiency ammonia volume control system based on gas-solid phase transition in the stratosphere environment.

Description

technical field [0001] The invention relates to the technical field of low-temperature refrigeration, in particular to an ammonia volume control system based on gas-solid phase transition. Background technique [0002] In the stratosphere, there are few vertical airflows, and the air mainly moves horizontally, and it is relatively gentle, which is suitable for long-term residence and flight of stratospheric airships. However, the atmosphere in the stratosphere is thin, and the airship needs a huge volume to run smoothly in it, and the thrust-to-weight ratio is extremely small, the aerodynamic operation ability is poor, and the control input is limited. Moreover, the content of water vapor and dust in the stratosphere is very small, and the thermodynamic parameters such as temperature and pressure inside the airship change significantly with the thermal environment such as solar radiation, which affects the normal operation of the airship. Therefore, the height, pressure and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B13/00F25B31/00F25B43/00F28D7/08F28F1/30F28F9/00B64B1/62B64B1/64F25B41/20F25B41/30
Inventor 公茂琼赵延兴王宪董学强
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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