A vehicle engine waste heat recovery system based on the principle of organic rankine cycle

Abstract

The invention belongs to the technical field of waste heat recovery for vehicles and in particular relates to an organic Rankine cycle principle based waste heat recovery system for a vehicle engine. The outlet end of a refrigerant pump is connected with three branches; the first branch is connected with a heat regenerator through a pipeline; the third branch is connected with the tail end of an EGR boiling evaporator through a pipeline; the pipeline, after being connected with the heat regenerator, of the first branch and the pipeline, after being connected with the tail end of the EGR boiling evaporator, of the third branch converge to form a converged branch; the converged branch is sequentially connected with a cooling liquid ebullator and the front end of the EGR boiling evaporator through a pipeline; and the second branch is connected with a tail gas ebullator through a pipeline and is then sequentially connected with an expansion machine, the heat regenerator, a condenser, a liquid storage tank and the inlet end of the refrigerant pump through a pipeline after converging with the converged branch. The organic Rankine cycle principle based waste heat recovery system for the vehicle engine recovers tail gas exhaust waste heat of the engine, tail gas recycling waste heat of the engine and waste heat of cylinder sleeve cooling liquid of the engine, converts the heat energy to the kinetic energy, recovers the energy and lowers the discharge of CO2 by the vehicle.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of automobile waste heat recovery, and particularly refers to a vehicle engine waste heat recovery system based on the principle of organic Rankine cycle. [0003] Background technique: [0004] With the increasingly strict and implementation of road vehicle emission regulations, after the implementation of the Euro VI emission regulations, it will be entered in 2020 to limit CO 2 The implementation stage of emission-based carbon emission regulations. For this reason, strict requirements and standards have been put forward for the fuel consumption per 100 kilometers of the engine. For this reason, Rankine Cycle's technology represents various waste heat recovery technologies, which will become the future vehicle to reduce CO 2 One of the most effective means and technologies for emissions. [0005] At the same time, the energy utilization efficiency of the engine is relatively low, generally about 40%, and t...

AI Technical Summary

Problems solved by technology

Among them, in the narrow space of the vehicle, how to ensure that Freon leaks less or does not leak into the atmosphere, and absolutely does not allow Freon to leak into the engine cylinder for combustion during the process of absorbing engine recirculation exhaust gas and charge air heat, and N 2 Wait for the reaction to produce highly toxic gas and discharge it into the atmosphere with the engine exhaust, causing atmospheric pollution of toxic gas

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