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Computer gas volume metering method and device for natural gas fuel cylinder of vehicle

A measurement method and technology of natural gas, applied in the direction of volume measurement instrument/method, measurement capacity, measurement device, etc., can solve problems such as unconsidered, lack of measurement methods, and difficult vehicle natural gas leakage

Inactive Publication Date: 2007-07-11
上海市公用事业研究所
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, environmental temperature changes have a significant impact on the pressure in the gas cylinder. The existing pressure gauges do not take into account the influence of temperature changes on the pressure in the gas cylinder, so they cannot display the real gas storage capacity in the vehicle gas cylinder and assess the gas consumption of a single vehicle. It is Difficult to Find Vehicle Gas Leakage in Time
Due to the lack of metering means, there is no metering device suitable for natural gas vehicles at home and abroad. It is impossible to know the real gas storage capacity and gas usage of the vehicle, which brings a lot of inconvenience to the users of natural gas vehicles. Measuring methods and devices are the top priority

Method used

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  • Computer gas volume metering method and device for natural gas fuel cylinder of vehicle
  • Computer gas volume metering method and device for natural gas fuel cylinder of vehicle
  • Computer gas volume metering method and device for natural gas fuel cylinder of vehicle

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Embodiment Construction

[0032] Below in conjunction with accompanying drawing, the present invention will be further described:

[0033] The present invention is a computer measuring method and device for gas storage capacity of natural gas vehicle gas cylinders, the basic principle of which is to utilize the state equation of an ideal gas.

[0034] That is, when the mass is M, the molar mass is M mol When the ideal gas is in equilibrium, the relationship between its P, V, and T is:

[0035] PV = M M mol RT - - - ( 1 )

[0036] R—molar gas constant, R=8.31J / mol K in the international system of units

[0037] P—gas pressure (Pa)

[0038] M—gas mass (Kg)

[0039] V—gas volume (m 3 )

[0040] However, real gases can obey the ideal gas state equation only when the density is not too high, the pressure is not too high ...

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Abstract

A device consists of monoithic computer, temperature measuring unit on cylinder wall, pressure measuring unit on tube between pressured release valve and gas cylinder, man-machine component and a display. It is featured as connecting output end of the two units to input end of A / D conventer separately for transmitting digital value to monolithic computer.

Description

Technical field: [0001] The invention relates to a natural gas vehicle, in particular to a computer measuring method for the gas storage capacity of a gas cylinder of a natural gas vehicle. Background technique: [0002] As the modern society pays more and more attention to environmental protection, environment-friendly vehicles using natural gas as fuel, that is, natural gas vehicles, are increasingly favored by people. Natural gas vehicles use natural gas as fuel, and do not produce toxic and harmful exhaust gas when driving. Natural gas is stored in the cylinder in a compressed gas state. During use, the pressure in the cylinder changes between 2-20MPa. However, environmental temperature changes have a significant impact on the pressure in the gas cylinder. The existing pressure gauges do not take into account the influence of temperature changes on the pressure in the gas cylinder, so they cannot display the real gas storage capacity in the vehicle gas cylinder and asses...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F22/02
Inventor 孙芃
Owner 上海市公用事业研究所
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