Organic Rankine cycle power generation system using waste heat of engine exhaust

Abstract

The invention provides an organic Rankine cycle power generation system using waste heat of engine exhaust. The organic Rankine cycle power generation system comprises an engine, an expansion working section, a condensation section, a boosting section and a heat-absorbing section. An organic working medium is circulated among the expansion working section, the condensation section, the boosting section and the heat-absorbing section through pipelines. The expansion working section comprises an expansion power machine and a power generating device connected with the expansion power machine. The heat-absorbing section comprises a steam pocket, a heat-absorbing part, a heat-releasing part, an ascending pipe, a descending pipe and an evaporator. The heat-releasing part is connected with the heat-absorbing part through the ascending pipe and the descending pipe. The heat-absorbing part and the evaporator are all arranged inside an engine exhaust smoke channel. The steam pocket is connected with the evaporator. A closed loop is formed by connecting of the expansion power machine, the condensation section, the boosting section, the heat-releasing part and the steam pocket in a series mode through the pipelines. According to the organic Rankine cycle power generation system using the waste heat of the engine exhaust, the flue gas loss is lowered, so that the waste heat utilization efficiency of smoke gas is improved, the Rankine cycle efficiency is improved, and the problem of acid dew corrosion is effectively avoided.

Description

technical field [0001] The invention relates to an organic rankine cycle power generation system, in particular to an organic rankine cycle power generation system utilizing engine exhaust waste heat. Background technique [0002] Rankine cycle power generation is a relatively mature power generation system for recovering medium and low temperature waste heat, but there are few reports on its application in the recovery of engine exhaust waste heat. Even if there is, there is no mention of how to effectively prevent acid dew corrosion. There are two types of traditional Rankine cycles. [0003] The first is the steam Rankine cycle, which uses a steam turbine as an expansion power generation device. Its disadvantages are: [0004] 1. The utilization range of waste heat resources is relatively narrow, and only waste heat resources above 300°C can be used. [0005] 2. The condensation pressure is lower than the atmospheric pressure, which may easily lead to the infiltration o...

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Problems solved by technology

[0009] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an organic Rankine cycle power generation system utilizing engine exhaust waste heat, which is used to solve the problem of the organic Rankine cycle power generation system in the prior art when utilizing flue gas waste heat. The problem of acid dew corrosion in the equipment in the flue

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