Recombination device for internal combustion engine cooling cycle and exhaust energy recovery ORC and control method

Abstract

The invention discloses a recombination device for internal combustion engine cooling cycle and exhaust energy recovery ORC and a control method. The recombination device is characterized in that an electric water pump A is arranged between a condenser in ORC and a heat dissipation water tank outlet in internal combustion engine cooling cycle so as to achieve ORC condensing pressure control and rapid warming of an internal combustion engine. The control method comprises a control method for an ORC controller and a control method for an internal combustion engine cooling cycle controller. The control method for the ORC controller is a control method based on a state machine, the state machine defines running modes of the recombination device such as shutdown, warming, starting, impulse starting, doing work and protection and transfer logical relations of the modes, and the corresponding control operation is performed on the basis of the determined running mode. A technical solution to two application problems including heat source fluctuation and cold source lacking which occur in ORC recycling of vehicle internal combustion engine exhaust energy under the road working conditions is provided.

Description

technical field [0001] The invention belongs to the technical field of waste heat energy recovery and control of internal combustion engines, and relates to a composite device and a control method combining a vehicle internal combustion engine cooling cycle and exhaust energy recovery ORC (Organic Rankine Cycle). Background technique [0002] According to the energy balance analysis of the internal combustion engine, at present, only about one-third of the energy released by the fuel combustion of the internal combustion engine is effectively used, and the rest of the energy is eventually dissipated into the atmosphere in the form of waste heat. Therefore, the waste heat of the internal combustion engine can be effectively recovered and Utilization is an important way to further improve the efficiency of internal combustion engines, reduce carbon dioxide emissions, and realize low-carbon internal combustion engines. [0003] Based on the recovery and utilization of waste hea...

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Problems solved by technology

[0010] Aiming at the two application problems of heat source fluctuation and lack of cold source when ORC is applied to recover the exhaust energy of internal combustion engines for vehicles, this invention proposes a composite device for internal combustion engine cooling cycle and exhaust energy recovery ORC, and fully considers the internal combustion engine cooling On the basis of cycle thermal management and ORC dynamic process control requirements, a corresponding control method is proposed, aiming to realize the optimization and control of ORC used to recover the transient exhaust energy of internal combustion engines for vehicles under road conditions

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