Comprehensive utilization system for waste heat of internal combustion engine
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An internal combustion engine, waste heat technology, applied in the direction of internal combustion piston engine, combustion engine, mechanical equipment, etc., can solve the problems of low efficiency and large variation range, so as to enhance heat exchange efficiency, reduce heat exchanger area, and improve waste heat utilization efficiency Effect
Active Publication Date: 2015-04-29
TSINGHUA UNIV
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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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[0025] The comprehensive utilization system of waste heat of internal combustion engine according to the present invention will be described in detail below with reference to the accompanying drawings.
[0026] refer to figure 1 According to the present invention, the system for comprehensive utilization of waste heat from internal combustion engines includes an exhaust gas energy recovery system 1 , an organic Rankine cycle system 2 , and a cooling water cycle system 3 . Exhaust gas energy recovery system 1 includes: turbocharger 11, one end communicates with the exhaust port (not shown) of internal combustion engine 5, receives the exhaust gas discharged by internal combustion engine 5 and utilizes the power energy of the exhaust gas received to enter the turbocharger 11 Compress the supplied air and output the compressed air and the waste gas after power energy consumption; the intercooler 12 communicates with the other end of the turbocharger 11 and communicates with the i...
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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 ...
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