Compressed air type motor vehicle exhaust waste heat recycling system and method

Abstract

The invention discloses a compressed air type motor vehicle exhaust waste heat recycling system and method. High-temperature exhaust emitted by a motor vehicle engine serves as a heat source, air serves as a working medium, and an open circulation is formed. A heat exchanger is installed in an air storage tank of the system and used for transferring high-temperature waste heat of motor vehicle exhaust to compressed air in the air storage tank, so that the temperature and the pressure of the compressed air are increased continuously. An air compressor / turbine and a motor play different roles in different working processes of the system, in the air compression stage, the motor is used as an electric motor, consumes electric energy and drives the air compressor to act, and air is compressed and delivered into the air storage tank; and in the high-temperature air expansion stage, the air compressor is used as a turbo-expander, the work generated by high-temperature high-pressure air expansion is converted into mechanical energy, and the motor is driven to generate power. Air is adopted as the working medium, the mechanical energy is adopted for compressing air, the motor vehicle exhaust waste heat is fully used for heating air, and therefore the acting capacity of the system is further improved.

Description

technical field [0001] The present invention relates to a waste heat recovery and utilization system and method, in particular to a waste heat recovery system and recovery method for internal combustion engine tail gas, and also to a waste resource recycling method and device, which are applied to the utilization technology of motor vehicle tail gas resources and the energy saving of motor vehicles technology field. Background technique [0002] A motor vehicle refers to a wheeled vehicle that is driven or towed by a power plant, runs on the road, is used for passengers, transports goods or performs special operations. According to statistics, by the end of 2014, the number of motor vehicles in my country reached 264 million, ranking second in the world. Among them, the vast majority of motor vehicles use internal combustion engines as the source of power, with gasoline and diesel as fuel. Due to the limitations of principle, design and manufacturing process, internal comb...

AI Technical Summary

Problems solved by technology

However, there are still some problems with this system. First, because the air needs to consume a lot of energy during the compression process, the energy generation process may still cause pollution.

Secondly, the amount of compressed air stored in the car is limited, making it difficult to achieve long battery life

Finally, to increase engine power, the system uses fuel to heat compressed air, making it difficult to achieve true zero emissions

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