Internal combustion engine waste heat recovery system adopting double-pressure multistage expansion reheating

A dual-pressure, internal combustion engine technology, applied in the field of Rankine cycle system, can solve limited problems, achieve the effect of increasing output power, improving fuel economy, and increasing heat

Active Publication Date: 2014-03-26
TIANJIN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

The operation of the internal combustion engine will generate more waste heat sources, and the temperature and heat flow of each waste heat source are different. The energy recovered by the simple organic Rankine cycle is very limited.

Method used

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  • Internal combustion engine waste heat recovery system adopting double-pressure multistage expansion reheating

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Embodiment Construction

[0009] The principle and arrangement scheme of the present invention will be further described below in conjunction with the accompanying drawings and through embodiments. It should be noted that this embodiment is illustrative rather than restrictive, and does not limit the protection scope of the present invention.

[0010] Dual-pressure multi-stage expansion reheating internal combustion engine waste heat recovery system, the technical scheme of its system composition and component connection is as follows: a condenser 1, a low-pressure working medium pump 2, a high-pressure working medium pump 6, a preheater 7 and a high-temperature intercooler 8 and the working medium side of the flue gas heat exchanger 9, the first expander 10, the working medium side of the reheater 11, the second expander 12, the mixing heat exchanger and the third expander 14 are connected in series to form the ORC main circulatory system. A low-temperature intercooler 3 and a low-temperature evapora...

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Abstract

The invention discloses an internal combustion engine waste heat recovery system adopting double-pressure multistage expansion reheating. The internal combustion engine waste heat recovery system is composed in a manner that an ORC main circulation system is formed by sequential serial connection of a condenser, a low-pressure working medium pump, a high-pressure working medium pump, a preheater, a high-temperature intercooler, a gas-gas heater, a first expansion machine, a reheater, a second expansion machine, a mixed heat exchanger and a third expansion machine. Working media output from the low-pressure working medium pump are divided into two groups and flow to a high-pressure branch and a low-pressure branch, and the working media of the two branches are converged in the mixed heat exchange. Cooling water circulation is formed by serial connection of a cylinder sleeve cooling water outlet, the preheater, a low-pressure evaporator and a cylinder sleeve cooling water inlet. A pressurization air loop is formed by serial connection of an air inlet, a turbocharger compressor inlet, the high-temperature intercooler and a low-temperature intercooler. An exhaust heat utilization system is formed by connection of an exhaust port, a turbine in a turbocharger, the gas-gas heater and the reheater. According to the internal combustion engine waste heat recovery system, loops are formed according to quality grading of internal combustion engine waste heat, so that waste heat of each part is utilized fully and heat recovered from waste heat sources can be increased.

Description

technical field [0001] The invention belongs to the waste heat utilization technology of an internal combustion engine, and in particular relates to a Rankine cycle system for recovering and utilizing the waste heat of an internal combustion engine with dual pressure and multistage expansion and reheating. Background technique [0002] For internal combustion engines, a large part of the energy generated by fuel is taken away by exhaust gas and cylinder liner cooling water. With the increasingly serious energy shortage and environmental problems, people pay more and more attention to the recovery of waste heat energy from internal combustion engines to reduce energy consumption. The Organic Rankine Cycle (ORC) technology has a simple structure, high thermal efficiency, and is safe and reliable. It is currently a research hotspot in internal combustion engine waste heat utilization technology. The operation of the internal combustion engine will generate more waste heat sour...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K27/02F02G5/00F01N5/02
CPCY02P80/15Y02T10/12
Inventor 李晓宁舒歌群王轩梁友才李团兵
Owner TIANJIN UNIV
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