Comprehensive waste heat utilization system of internal combustion engine

Abstract

The invention provides a comprehensive waste heat utilization system of an internal combustion engine. The system comprises an organic working medium pump, a first heat exchanger, an expansion machine, a second heat exchanger, a generator, a water inlet pipe, a water outlet pipe, a cooling water pump, a first stop valve, a first cooling tower, a second stop valve, a first inlet pipe, an absorption type heat pump unit, a first outlet pipe, a flue gas waste-heat heat exchanger, a flue gas emission pipeline, a fluid circulation inlet pipe, a fluid circulation outlet pipe, a third stop valve, a second outlet pipe and a fluid pump. The flue gas waste-heat heat exchanger and the absorption type heat pump unit are used for recovering waste heat of flue gas emitted by the internal combustion engine and waste heat of cooling water of the internal combustion engine for heating organic working medium, and the organic working medium is enabled to evaporate to overheating gaseous organic working medium under pressure for driving the expansion machine to act. Based on Rankine cycle of the organic working medium, waste heat energy of the internal combustion engine is recovered comprehensively, and comprehensive waste heat utilization efficiency of the internal combustion engine and power generation efficiency of an organic working medium Rankine cycle system 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 system for comprehensive utilization of waste heat of internal combustion engines. Background technique [0002] Internal combustion engine generator sets are widely used in engineering practice due to their miniaturization and portability. However, the actual power generation efficiency of the internal combustion engine generator set is at 40%, and a large amount of heat is dissipated to the outside through flue gas emission and cooling water circulation. Due to the low power level of a single internal combustion engine module, the waste heat of the internal combustion engine is mostly used for heating or cooling at this stage. Part of the solution is to concentrate the waste heat of multiple internal combustion engines to generate electricity. [0003] The exhaust heat of internal combustion engine has a relatively high temperature. If it is dir...

AI Technical Summary

Problems solved by technology

The organic Rankine cycle can make good use of the waste heat of the flue gas to generate electricity, but the power generation efficiency of the organic working medium Rankine cycle system is low, and most of the heat is lost through the condenser of the organic working medium Rankine cycle system. efficient way to recycle

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