Device and method for generating power by virtue of waste heat of internal combustion engine

Abstract

The invention discloses a device and a method for generating power by virtue of waste heat of an internal combustion engine. The device comprises a tail gas channel body which is serially connected to a heat end pipeline of an exhaust pipe of the internal combustion engine, cooling water pipelines which are distributed in the tail gas channel body in the form of an array, a plurality of thermoelectric power generation modules which are bonded and distributed on the outer surfaces of the cooling water pipelines, and a cooling water cyclic supply system used for enabling cooling water to cyclically flow in the cooling water pipelines, wherein the plurality of cooling water pipelines form an array, mutually spaced, and longitudinally and vertically distributed. According to the device and the method, a high-temperature tail gas is enabled to contact with the inner wall surface of the tail gas channel body, and further directly contacts with the outer surfaces of the cooling water pipelines which are arranged in the tail gas channel body in the form of an array, so that the high-temperature tail gas is much adequately collected and utilized, a heat transfer area is increased, and the temperatures of heat source ends of the thermoelectric power generation modules are further increased; and under the same waste heat working condition of the internal combustion engine, the waste heat collection rate and electric energy output power are remarkably increased compared with the prior art.

Description

technical field [0001] The invention relates to the field of waste heat recovery and utilization of internal combustion engines, in particular to a waste heat power generation device of an internal combustion engine and a method thereof. Background technique [0002] As the energy problem becomes more and more serious, the internal combustion engine is a key link in production capacity and energy use, and the issue of energy saving of internal combustion engines has attracted more and more attention. As we all know, the heat taken away by the exhaust of the internal combustion engine accounts for about 35% of the total heat of fuel combustion, but the waste heat of the exhaust gas of the internal combustion engine discharged through the exhaust pipe is one of the low-grade waste heat, the energy contained in the unit volume is low, and the utilization is difficult. Exhaust gas waste heat recovery and utilization methods mainly include air-conditioning refrigeration, waste he...

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Problems solved by technology

[0004] The above-mentioned devices are all based on existing thermoelectric materials, which generate a temperature difference between the hot and cold ends to realize the waste heat power generation device, but the heat obtained by the exhaust gas is limited, which makes the thermoelectric conversion efficiency lower

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