Pressurizing afterheat recovery system for internal combustion engine

Abstract

The invention provides a pressurizing afterheat recovery system for an internal combustion engine. The pressurizing afterheat recovery system comprises k turbochargers, k heat exchangers, an organic work medium pump, an expansion machine, a power generator and a condenser, wherein the i-th turbocharger is provided with the i-th expansion end and the i-th compression end, the i-th expansion end uses the kinetic energy of waste gas exhausted by an exhaust valve of a corresponding air cylinder of the internal combustion engine for compressing supply air input into the i-th compression end and outputting the compressed air, the i-th heat exchanger is communicated with the i-th compression end of the i-th turbocharger, the organic work medium pump is communicated with an external organic work medium liquid storage tank, the k heat exchangers are arranged at the downstream of the organic work medium pump and are communicated with the organic work medium pump in a controlled way, the expansion machine is arranged at the downstream of all of the k heat exchangers and is communicated with the k heat exchangers in a controlled way, the power generator is communicated with an external power supply or energy storage device in a controlled way and is communicated with the expansion machine in a controlled way, and the condenser is arranged at the downstream of the expansion machine, is communicated with the expansion machine in a controlled way, and is communicated with an external work medium liquid storage tank in a controlled way. The pressurizing afterheat recovery system has the advantage that the utilization efficiency of total energy of the internal combustion engine can be improved.

Description

technical field [0001] The invention relates to the field of waste heat utilization of internal combustion engines, in particular to a supercharging waste heat recovery system of internal combustion engines. Background technique [0002] In the internal combustion engine turbocharging system, in order to reduce the inlet air temperature of the internal combustion engine, an intercooler is required to cool down, and the air energy taken away by the intercooler has not been effectively recovered. In internal combustion engine mechanical devices that require a high pressure ratio, multi-stage supercharging is often required to achieve the air supercharging effect. The heat taken away by the intercooler is quite considerable, but the existing research on waste heat recovery of internal combustion engines is mostly limited to the direction of exhaust energy and cylinder jacket water waste heat energy recovery, and there is no practical and effective way for the intercooler. Con...

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Problems solved by technology

The amount of heat taken away by the intercooler is considerable, but the existing research on waste heat recovery of internal combustion engines is mostly limited to the direction of exhaust energy and cylinder jacket water waste heat energy recovery, and there is no substantial and effective method for the intercooler.

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