High temperature hot pipe center receiver for tower type solar energy heat power generation

Abstract

The invention relates to a central receiver for tower solar energy power generation. The structure of the invention is formed by connecting a heat absorption section of each two adjacent high temperature heat pipes by an orthoptera piece and distribution in an alignment. The high temperature heat pipes are vertically placed. The heat absorption section is on a lower end and a heat release section is in an upper end. A bushing is covered on the heat release section, each of which is composed of an upper header pipe and a lower header pipe to form a work fluid channel. The upper header pipe is provided with a work fluid inlet and the lower one is provided with a work fluid outlet. An external surface of the heat absorption section of the high temperature heat pipe and a surface of the orthoptera piece for connecting the high temperature heat pipe are on a high temperature resisting selective absorption coat in a part of the external part of the receiver. The invention solves the defects that the receiver is limited, an idle load state of the high temperature heat pipe exists, the heat-transfer capability is limited, the coefficient of heat transfer is smaller, the heat exchange efficiency is not ideal and so on. The invention, by the busing and the header pipe, improves the heat-transfer capability and the occurrence of the idle load state of the high temperature heat pipe, which is applied to the solar energy power generation in a great scale.

Description

technical field [0001] The invention relates to a high-temperature heat pipe receiver, in particular to a central receiver for tower-type solar thermal power generation. Background technique [0002] Tower-type solar thermal power generation technology uses a large number of flat mirror arrays to reflect sunlight to a solar receiver placed on the top of a tall tower, heat the working fluid to generate superheated steam or high-temperature and high-pressure air, and drive thermoelectric conversion equipment, so that the final Technology that converts solar energy into electricity. This technology has received great attention because it can realize large-capacity solar / electric energy conversion. As the core component of tower solar thermal power generation, the central receiver is the focus of research on key technologies of solar thermal power generation in various countries. [0003] There are two types of receivers for tower solar thermal power generation systems: cavity...

AI Technical Summary

Problems solved by technology

However, there are still some problems that cannot be ignored in the receiver of this structure, which have a certain impact on the work of the receiver: 1) The receiver is a cavity type, which affects the ability of the receiver to a certain extent for the large-capacity mirror field and The adaptability of the full circumferential mirror field greatly limits the application of the receiver; 2) Also due to the structural characteristics of the cavity type, the width of the light-facing surface cannot be made very large, and the high-temperature heat pipe in the heat-absorbing cavity The inside is a horizontal fork row. When the receiver is working, only the first and second rows of high-temperature heat pipes can receive light, and the other high-temperature heat pipes are in an unloaded state. On the one hand, this will cause waste of high-temperature heat pipes. Thermal capacity is very limited

3) The structure of the cold fluid channel is designed to exchange heat in a large space. The heat release section of the high-temperature heat pipe is directly inserted into the large space where the cold fluid is located. Such a heat exchange structure will make the heat transfer coefficient small and the heat transfer effect is not ideal

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