Ammonia gas liquefying system

Abstract

The invention provides an ammonia gas liquefying system. The ammonia gas liquefying system comprises an ammonia gas liquefying unit and a refrigerating cycle unit, wherein in the ammonia gas liquefying unit, low-pressure ammonia gas enters a liquid storage tank through a pressurizing module, a pipeline switching module and a liquefying pipeline in sequence via a pipeline; and meanwhile, in the refrigerating cycle unit, low-pressure refrigerants are compressed by a compressor and then enter the compressor through a condenser, a throttling valve and an evaporator in sequence via a pipeline to form a refrigerating cycle loop, and thus ammonia gas liquefying is realized.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to an ammonia liquefaction system. Background technique [0002] The stratospheric wind field is stable and the wind speed is low, which is suitable for the ultra-long and persistent flight of stratospheric airships. However, due to the thin stratospheric atmosphere, the airship not only has a huge size, but also has a very small thrust-to-weight ratio, weak aerodynamic maneuverability, and greatly limited control input. At the same time, the thermal environment such as stratospheric solar radiation changes drastically, which affects the internal temperature, pressure and other thermal parameters of the airship, forming a serious "superheat" disturbance phenomenon, which makes the independent and effective control of the airship's height, pressure and buoyancy face great technical challenges. . Achieving long-term air presence in the stratosphere is a common challenge faced ...

AI Technical Summary

Problems solved by technology

Because in the stratosphere environment, the atmospheric pressure is only 5500Pa, which is lower than the triple point pressure of ammonia, under this pressure, ammonia cannot be liquefied; at the same time, the smaller the saturation pressure of ammonia, the greater its latent heat, The greater the refrigeration capacity required for liquefaction, the greater the burden on the refrigeration system

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