Organic rankine cycle air inflow supercharging internal combustion engine system and method

Abstract

The invention provides an organic rankine cycle air inflow supercharging internal combustion engine system and method. The system comprises an internal combustion engine, a gas compressor, an intercooler, a preheater, an evaporator, an expanding agent, an electric generator, a condenser, a liquid storage tank and a working medium pump. According to the organic rankine cycle, low-boiling-point organic matter serves as a working medium, the intercooler, the preheater and the evaporator sequentially absorb compression air heat, cooling liquid heat and engine tail gas waste heat, saturated steam or overheat steam is generated and enters an expanding machine for doing work, the electric generator is driven to generate power, and meanwhile, power is provided for the gas compressor for internal combustion engine air inflow supercharging. According to the system, on the one hand, the ORC expanding machine replaces a turbine in a turbine supercharging internal combustion engine, and equipment can be simplified; on the other hand, the working medium absorbs heat in a stair manner from different devices, the heat exchange temperature difference is small, the work doing energy loss is small, the internal combustion engine waste heat can be used to the maximum degree, the main energy use efficiency is maximum, and the whole system is efficient and environment-friendly.

Description

technical field [0001] The invention relates to the field of waste heat utilization of internal combustion engines, in particular to an organic Rankine cycle intake boost internal combustion engine system and method. Background technique [0002] From the perspective of the energy balance of the internal combustion engine, the output effective power generally only accounts for 30%-45% of the total heat of fuel combustion (diesel engine) or 20%-30% (gasoline engine), except that less than 10% is used to overcome power losses such as friction In addition, the remaining waste heat energy is mainly discharged into the atmosphere through exhaust gas (200-700°C) and cooling medium (cooling water, engine oil heat dissipation, etc., 85-120°C). Therefore, the efficient conversion and reuse of the waste heat energy of the internal combustion engine is an effective way to improve the total energy efficiency, reduce fuel consumption and reduce pollutant emissions. [0003] In order to ...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an organic Rankine cycle air intake supercharged internal combustion engine system and method to solve the problems of complicated systems and large heat loss in turbocharged internal combustion engines

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