Cold energy utilizing device for liquefied natural gas fueled bus

Abstract

The invention discloses a cold energy utilizing device for a liquefied natural fueled bus. LNG (liquefied natural gas) enters a fin type heat exchanger through a pressure adjusting valve, an intake type fan is mounted at one end of the heat exchanger to cool the bus with low-temperature cold air, and the cold air is heated and gasified by a vehicular circulating water tank and then conveyed to an engine. Using the method can recover cold energy in the LNG gasifying process, greatly reduce energy waste and reduce gas load of an air-conditioning system of the bus. 7.2m3 gas can be saved each day if each bus runs for 12 hours each day, and the total saved cost is 32.4yuan. The policy of energy saving and emission reduction can be met while the cold energy in the LNG gasifying process can be effectively used. The method is technically mature, all equipment can be domestically produced, automatic control level is high, and the cold energy utilizing device has fine industrial popularization and application prospect.

Description

technical field [0001] The invention belongs to the technical field of cold energy utilization, and in particular relates to a cold energy utilization device for LNG buses. Background technique [0002] As a common means of transportation, buses are mainly driven by gasoline. However, with the increasingly serious energy crisis and environmental pollution, in recent years, major automobile producing countries have been adjusting their automobile development strategies, vigorously developing energy-saving vehicles and new energy vehicles, and extended-range electric vehicles are based on existing electric vehicle technology. , add a range extender to the overall structure, and organically combine the range extender with the electronic control system of the electric vehicle. Calculated by running 10 hours a day, the average required power is 20-30kW, and calculated by 160km per day. In the case of external charging at night, only 35L of fuel is consumed per day, compared with...

AI Technical Summary

Problems solved by technology

LNG comes out of the storage tank and directly enters the carburetor for gasification, which does not effectively utilize this part of the cold energy, and also increases the requirements for the carburetor; the vacuum degree of the vehicle storage tank cannot be guaranteed for a long time, and once the vacuum degree decreases, the storage tank will be safe. The damage of accessories will be accelerated, the seal of the joint of the valve compartment will be deteriorated, the unit fuel consumption of the vehicle will be greatly increased, and the economy and safety will not be guaranteed.

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