Composite power system and method for recycling flue gas afterheat of vehicles

Abstract

The invention provides a composite power system and method for recycling flue gas afterheat of vehicles and belongs to the fields of energy resource and power and the like. The system is characterized by also comprising an organic Rankine cycle subsystem, wherein the subsystem comprises a multi-loop heat exchanger arranged in a flue gas silencing device of an engine heat transfer power subsystem,an organic turbine mutually connected with the gas phase outlet of the multi-loop heat exchanger, an organic working medium condenser mutually connected with an exhaust gas outlet of the organic turbine, and a liquid storage tank mutually connected with the organic working medium outlet of the working medium condenser; the liquid storage tank is mutually connected with the liquid phase inlet of the multi-loop heat exchanger through an organic circulation pump; and the environment air cooling subsystem also comprises a condenser cooling device. The system provided by the invention has the characteristics of simple and compact structure and high efficiency and the like; and the transport capacity of vehicles can be improved, the engine sizes can be reduced, and the vehicle energy-saving andemission-reduction performances can be improved.

Description

technical field [0001] The invention relates to a composite power system and method for recovering waste heat of vehicle flue gas, belonging to the field of energy and power. Background technique [0002] The current thermal efficiency of a vehicle engine is generally 33%, and its exhaust waste heat accounts for about 33% of the calorific value of the fuel input into the entire system. At present, the temperature of vehicle engine flue gas is relatively high, generally 600K~1000K, and direct discharge to the environment not only causes local thermal pollution, but also causes great waste. Recovering engine exhaust waste heat and improving the overall energy utilization efficiency of vehicles is a current research hotspot. Researchers have proposed various solutions such as fuel cell hybrid vehicles, recovering waste heat from flue gas for automotive air conditioning, etc. However, due to the low exhaust pressure of the engine, the heat collected from the exhaust will affect...

AI Technical Summary

Problems solved by technology

However, due to the low exhaust pressure of the engine, the heat collected from the exhaust will affect the performance of the engine itself, and the current independent exhaust heat recovery and utilization system has a complex structure and high cost

However, the recovery and utilization of flue gas waste heat that should be obtained is mostly concentrated in the field of automotive air conditioning, and is rarely used in other fields.

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