Liquid storage device for preventing pump cavitation of ORC power generation system and application method of liquid storage device

Abstract

The invention relates to a liquid storage device for preventing pump cavitation of an ORC power generation system and a work method of the liquid storage device. The liquid storage device comprises a condenser. The condenser is divided into a working medium side runner and a cooling water runner. In the working medium flowing direction, the working medium side runner is connected with a system working medium side inlet and a working medium liquid storage tank through pipelines. The working medium liquid storage tank is sequentially connected with a working medium pump and a system working medium side outlet through pipelines. A working medium tank cooling pipeline is arranged in the working medium liquid storage tank. In the cooling water flowing direction, the inlet end of the working medium tank cooling pipeline is sequentially connected with a cooling water circulation pump and a system cooling water side inlet through pipelines, the outlet end of the working medium tank cooling pipeline is connected with the cooling water runner through a pipeline, and the cooling water runner is further connected with a system cooling water side outlet through a pipeline. According to the liquid storage device for preventing pump cavitation of the ORC power generation system and the work method of the liquid storage device, the heat exchange effect is changed by adjusting the flow of cooling water, the organic working medium temperature is controlled, NPSHa control is achieved, the organic working medium temperature is reduced through cooling water, increasing of NPSHa is guaranteed, and the problem of pump cavitation is solved.

Description

technical field [0001] The invention relates to the technical field of pump cavitation protection in a power generation system, in particular to a liquid storage device for preventing pump cavitation in an ORC power generation system and a method for using the same. Background technique [0002] In order to improve energy utilization, the state has put forward the "13th Five-Year" energy-saving and environmental protection development plan, and actively encourages the development and utilization of waste heat energy; as a domestic emerging thermoelectric conversion technology, the organic Rankine cycle (ORC) power generation system has the advantage of using heat sources with low temperature , The system has the advantages of low working pressure, small system footprint, convenient transportation and installation of the skid-mounted body, good adaptability, high efficiency and environmental protection, etc., and has become a research hotspot in the field of waste heat recover...

AI Technical Summary

Problems solved by technology

[0004] For the cavitation phenomenon, the solution is usually to reduce the height of the pump and increase the liquid level to increase the pressure at the pump inlet, thereby increasing the effective NPSH to avoid cavitation, but this method requires a lot of space, 1- Only a height difference of 2m can prevent cavitation, which increases the cost of civil engineering and affects the layout of the small skid-mounted body of the ORC power generation unit, which is often impossible to implement due to the constra

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