Multi-stage capillary pump

A capillary pump and capillary technology, which is applied in the field of alkali metal thermoelectric direct conversion devices, can solve problems such as affecting the efficiency of thermoelectric converters, and achieve the effects of avoiding interruption of alkali metal working medium, full circulation, and avoiding dry burning.

Inactive Publication Date: 2009-12-02
HARBIN ENG UNIV
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Problems solved by technology

In previous studies, it was found that there are many fac

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  • Multi-stage capillary pump
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Embodiment Construction

[0022] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0023] combine figure 1 , the main components of the first embodiment of the present invention are all porous structures. Therefore, according to the aperture size, the device of the present invention can be divided into three stages. The first stage porous structure is the condenser 1 . The second level of porous structure is the capillary channel 2 . The third level porous structure is the evaporator 3 . The condenser is directly connected to the capillary passage. In order to ensure the stability of the condenser, a supporting frame can be used to support it. The capillary passage is connected with the evaporator by a refractory metal sleeve 4 . There are stainless steel sleeves 5 in the capillary passage and the outer jacket of the evaporator, and vacuum welding is used between the evaporator and the stainless steel sleeve to ensure the sealing performan...

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Abstract

The invention provides a multi-stage capillary pump, which comprises a first-stage porous structure taken as a condenser, a second-stage porous structure taken as a capillary channel and a third-stage porous structure taken as an evaporator, wherein the three stages of porous structures are connected into a whole; capillary apertures of the porous capillary structures are different from each other, the first-stage porous structure has the largest capillary aperture, the second-stage porous structure has the capillary aperture smaller than that of the first-stage porous structure, and the third-stage porous structure has the smallest capillary aperture; and an outlet end of the third-stage porous structure of the evaporator is provided with an concave outlet. The multi-stage capillary pumpcan ensure the full circulation of an alkaline metal working fluid in an alkaline metal thermoelectric direct converter, avoid the flow breaking of the alkaline metal working fluid formed by the alkaline metal thermoelectric direct converter during high load, and avoid the dry burning produced in the capillary pump.

Description

(1) Technical field [0001] The invention relates to a porous structure device which integrates condensation, transmission and evaporation of working fluid. The device is particularly suitable for use in an alkali metal direct thermoelectric conversion device (abbreviated AMTEC). (2) Background technology [0002] The alkali metal thermoelectric conversion device is just a device that utilizes the latent heat of the alkali metal working fluid for energy transfer. The alkali metal working medium is sodium, potassium and their alloys. In previous studies, it was found that there are many factors affecting the efficiency of thermoelectric converters. Such as solid electrolyte (Beta″Alumina Solid Electrolyte-BASE) performance, electrode performance, overall heat loss, high and low temperature end temperature, etc. Since the condensation, power source and evaporation of the working fluid all occur in the porous structure. Therefore, the porous structure is of great importance to...

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Application Information

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IPC IPC(8): H02N3/00
Inventor 周春良郑洪涛张宝岭王嘉宁
Owner HARBIN ENG UNIV
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