A new supercritical water parallel channel segment adjustable electric heating device

Abstract

The invention discloses a novel supercritical water parallel channel section adjustable electric heating device, which includes a heating channel with equal wall thickness, at least three conductive copper bars are arranged on the heating channel, and two adjacent conductive copper bars are connected There is a heating module, and the heating module includes a programmable DC power supply and a unidirectional diode connected to the programmable DC power supply. Two adjacent heating modules form a heating module group, and the negative poles of the two unidirectional diodes in the heating module group are connected to the negative poles. The positive poles of the two unidirectional diodes are connected to the positive poles, and the current loops formed by the two adjacent heating modules and the conductive copper bars do not communicate with each other. The segmental heating of the supercritical parallel channel is realized, and the heating power of each segment can be adjusted independently in a transient state, which satisfies the simulation of non-uniform heating experimental conditions in the thermal hydraulic experimental research of the reactor. At present, the invention has been used to carry out mechanism experiment research on the flow instability of the supercritical water-cooled reactor scheme.

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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