Novel supercritical water parallel channel segment adjustable electric heating apparatus

Abstract

The invention discloses a novel supercritical water parallel channel segment adjustable electric heating apparatus. The apparatus comprises a heating channel with an equal wall thickness, the heating channel is provided with at least three conductive copper bars, a heating module is connected between two adjacent conductive copper bars, each heating module comprises a programmable DC power source and a unidirectional diode connected with the programmable DC power source, two adjacent heating modules form one heating module group, cathodes of two unidirectional diodes of the heating module group are connected, anodes of the two unidirectional diodes are connected, and two adjacent heating modules do not flow mutually with a current loop formed by the conductive copper bars. According to the invention, segment heating of a supercritical parallel channel is realized, heating power of each segment can realize independent transient adjustment, and simulation of non-uniform heating experiment conditions in reactor thermohydraulic experimental research is satisfied. At present, mechanism experimental research is conducted on a supercritical water cooled reactor by use of the apparatus provided by the invention.

Description

technical field [0001] The invention relates to the technical field of segmental heating of supercritical water parallel channels, in particular to a novel supercritical water parallel channel segmental adjustable electric heating device. Background technique [0002] Nuclear power is the pillar of low-carbon energy supply. Compared with traditional thermal power, hydropower and wind power, nuclear power has the advantages of no emission of carbon dioxide and waste gas, no environmental pollution, stable power generation and low cost. Due to the continuous development of the global economy and the demand for low-carbon emission reduction, nuclear power is favored by more and more countries. In order to further improve the safety and economy of future nuclear power plants, domestic and foreign nuclear power enterprises and scientific research institutions have started the research and development of the fourth-generation nuclear energy system. [0003] The supercritical wate...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is that in the existing research on the instability of non-uniform heat flux flow in thermal experiments, the method of non-uniform wall thickness is used, which requires a high level of processing and manufacturing of the heating channel, and it is impossible to realize the control of power. Distributed transient control and directional adjustment cannot be applied to experimental research with transient adjustment requirements

The purpose of the present invention is to provide a new type of supercritical water parallel channel segment adjustable electric heating device. Conductive copper bars are installed on the heating channel, and the adjacent conductive copper bars are set as independent heating ends for heating in the corresponding heating channel area. It is impossible to simulate the axial power distribution characteristics of the water-cooled reactor, and the technical problems of transient control and directional adjustment

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