Comprehensive utilization system for waste heat of internal combustion engine

Abstract

The invention provides a comprehensive utilization system for waste heat of an internal combustion engine. The comprehensive utilization system comprises a tail gas energy recovery system, an organic Rankine circulating system and a cooling water circulating system, the tail gas energy recovery system comprises a turbocharger, an intercooler, a waste gas pipeline and a gas-water heat exchanger, the organic Rankine circulating system comprises an organic working medium pump, an evaporator, an expander, a condenser and a power generator, and a cooling water circulating loop comprises a water incoming pipe, a water outgoing pipe, a three-way valve with an inlet, a first outlet and a second outlet, a water tank and a double heat exchange pipeline. Cooling water discharged from a water outlet of the internal combustion engine flows through the water outgoing pipe, the inlet of the three-way valve, the second outlet of the three-way valve, the double heat exchange pipeline, the gas-water heat exchanger, the evaporator, the water tank, the water incoming pipe to enter a water inlet of the internal combustion engine so as to realize cooling water heat exchange circulating. Temperature of the cooling water is increased under heating action of waste-gas waste heat discharged by the internal combustion engine, so that heat exchange efficiency of an organic working medium and the cooling water is improved, more heat can be recovered by the organic working medium, and waste heat utilization efficiency of the internal combustion engine is improved.

Description

technical field [0001] The invention relates to the field of waste heat utilization of internal combustion engines, in particular to a comprehensive utilization system of waste heat of internal combustion engines. Background technique [0002] Part of the heat generated by the combustion of fuel in the internal combustion engine is taken away by the cooling system of the internal combustion engine, and part of it is discharged with the exhaust gas, and only a small part of the energy is used to do work. Recycling the cooling heat and exhaust energy of the internal combustion engine can improve the overall thermal efficiency of the internal combustion engine, so as to improve the fuel and gas economy of the internal combustion engine. [0003] At this stage, the cooling heat of internal combustion engines mostly adopts water cooling. Most of the heat taken away by the cooling water is returned to the cylinder liner of the internal combustion engine for circulation after the ...

AI Technical Summary

Problems solved by technology

Due to the wide range of the exhaust heat energy of the internal combustion engine, the efficiency of existing waste heat recovery and utilization methods is low

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