Liquefied natural gas vaporization system and automobile

Abstract

A liquefied natural gas vaporization system comprises a liquefied gas bottle, a vaporizer, a heating medium pipe and gas burning equipment, wherein the liquefied gas bottle is communicated with the vaporizer, and the heating medium pipe penetrates through the vaporizer which is communicated with the gas burning equipment; the liquefied natural gas vaporization system further comprises an electronic control unit, a temperature sensor electrically connected with the electronic control unit as well as a flow adjusting valve, and the temperature sensor is used for sensing the temperature of liquefied natural gas vaporized gas output by the vaporizer and informs the electronic control unit of the temperature; the flow adjusting valve is arranged on the heating medium pipe, is controlled by the electronic control unit and is used for adjusting flow of heating media in the heating medium pipe. The invention further provides an automobile. The liquefied natural gas vaporization system and the automobile have the advantage that the temperature of the liquefied natural gas vaporized gas output by the vaporizer can be controlled in a certain range.

Description

technical field [0001] The invention relates to the technical field of liquefied natural gas temperature control, in particular to a liquefied natural gas vaporization system and an automobile. Background technique [0002] With the development of new energy technology of liquefied natural gas, the technology of LNG new energy bus (bus using liquefied natural gas as fuel) is changing with each passing day. It has the advantages of small size and long driving range. As a fuel, it is three times that of a passenger car), basically reaching the level of a fuel engine, so that the scope of use of LNG new energy passenger cars has also been expanded, and can be applied to road passenger transportation and tourism markets. The mileage of 1 cubic meter of natural gas at normal temperature and pressure is approximately equal to 1 liter of diesel (gasoline) oil, and the fuel cost of commercial buses using LNG is 33.3% lower than that of diesel. In the case of the same driving range,...

AI Technical Summary

Problems solved by technology

[0004] The natural gas engine 17 requires the temperature of the boil-off gas entering it to be constant, however, in the existing liquefied natural gas vaporization system, the vaporization temperature of the boil-off gas entering the natural gas engine 17 is greatly affected by the ambient temperature

When the ambient temperature is high in summer, the vaporization temperature of the vaporized gas entering the natural gas engine 17 will also increase, the density of the vaporized gas will decrease, and the amount of vaporized gas entering the natural gas engine 17 will decrease for a certain period of time, which will affect the combustion efficiency of the natural gas engine 17

When the ambient temperature is low in winter and the hot water circulation provided by the natural gas engine 17 is not enough to balance the heat energy absorbed during the vaporization of the liquefied natural gas, the vaporization temperature of the vaporized gas entering the natural gas engine 17 will also decrease, and even the problem of inability to vaporize will occur, affecting liquefaction Working with gas equipment

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