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Dry ice type inert gas making cooling type fuel tank inerting system

A technology of air cooling and dry ice, which is applied in the field of aviation systems, can solve the problems of large structural weight and high manufacturing cost, and achieve the effect of no compensation loss and high efficiency

Pending Publication Date: 2019-10-01
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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AI Technical Summary

Problems solved by technology

[0004] Although these new inertization technologies have high inertization efficiency and can continuously improve the inertization of fuel tanks with nitrogen-rich gas, their manufacturing costs are expensive and the structure and weight are too heavy to be suitable for civil aircraft.

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  • Dry ice type inert gas making cooling type fuel tank inerting system

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Embodiment Construction

[0020] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with specific embodiments.

[0021] The embodiment of the present invention provides a dry ice-based inert gas-cooled fuel tank inerting system, such as figure 1 Shown, including: dry ice storage tank 1, pressure regulating valve 2, stop valve 3, heat exchanger 4, dryer 5, first electric regulating valve 6, second electric regulating valve 7, temperature sensor 8, oxygen concentration sensor 9 , Fan 11, third electric regulating valve 12, controller 13.

[0022] The fuel tank 10 has two inlet ports and one outlet port. The probes of the oxygen concentration sensor 9 and the temperature sensor 8 extend into the upper space of the oil tank 10 to be operated to detect the oxygen concentration and temperature of the upper part of the oil tank 10.

[0023] The cold side inlets of the dry i...

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Abstract

The invention discloses a dry ice type inert gas making cooling type fuel tank inerting system and belongs to the field of science and technology of aviation systems. The specific principle of the system is as follows: a high pressure container which stores dry ice extracts low temperature carbon dioxide generated by sublimation of dry ice by adjusting the pressure, a fuel and steam mixture in a fuel tank extracted from a gas space on the upper part of the fuel tank is cooled through a heat exchanger, and meanwhile, the sublimated carbon dioxide gas and the cooled fuel and steam mixture returnto the fuel tank, the fuel and steam mixture in the upper part of the fuel tank is cooled while the original fuel and steam mixture rich in oxygen is replaced, and the content of fuel and steam is reduced to achieve an inerting purpose. The fuel tank is inerted by means of two inerting principles: reducing the oxygen concentration content and reducing the fuel and steam contents, so that the dryice type inert gas making cooling type fuel tank inerting system has the advantages of being high in efficiency and free of compensatory loss and the like.

Description

Technical field [0001] The invention relates to the technical field of aviation systems, in particular to a dry ice-made inert gas cooling type fuel tank inerting system. Background technique [0002] The safety issues of modern aircraft have always been widely concerned by the society, and the combustion and explosion of the fuel system are one of the main causes of aircraft crashes. According to statistics, during the Vietnam War, the US Air Force suffered ground fire attacks and lost thousands of aircraft. Among them, the proportion of aircraft crashes due to fire and explosion of aircraft fuel tanks was as high as 50%. The cabin safety research technical group (GSRTG) statistics of 3726 civil aircraft accidents worldwide from 1966 to 2009 show that a total of 370 accidents were related to fuel tank combustion and explosion. It can be seen that effective measures must be taken to prevent the aircraft's fuel tank from exploding. [0003] The upper space of the aircraft fuel tan...

Claims

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Application Information

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IPC IPC(8): B64D37/32B64D37/34
CPCB64D37/32B64D37/34
Inventor 谢辉辉朱天宇冯诗愚彭孝天江荣杰
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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