Vacuum enhancing system or non-evaporable getter

Inactive Publication Date: 2012-10-04
ABENGOA SOLAR NEW TECH SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These molecules end up passing through the metal tube and entering the vacuum area, increasing the thermal losses and, accordingly, significantly reducing the efficiency of the system.
This arrangement has a number of drawbacks such as: increase in the necessary minimum diameter of glass tube to house all those elements in its interior, subjecting the getter to mechanical stresses suffered by the expansion compensation bellows, the need to introduce the getter round pads in a sheath and with a protective mesh touching the expansi

Method used

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  • Vacuum enhancing system or non-evaporable getter
  • Vacuum enhancing system or non-evaporable getter
  • Vacuum enhancing system or non-evaporable getter

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Example

[0033]To achieve a better understanding of the invention the new design of non-evaporable getter according to a preferred embodiment will be described next.

[0034]The idea when modifying this assembly begins with the idea of piercing the pads (1), as seen in FIG. 1, to be able to place a metal cable (2) inside serving as a guide, such as the one shown in FIG. 2, with a quick-fit closure that can be of various types (3′, 3″, 3′″, 3iv) that will be detailed later. Thus the formation of a single assembly is allowed, such as it is shown in FIG. 3. In this way having to introduce the getter pads in a sheath, as it has been the case so far, is prevented.

[0035]FIG. 4 shows the location of the assembly at the end of the receptor tube. In this figure is observed the assembly formed by the pads (1), the metal absorber tube (4) within which the heat-transfer fluid circulates, the glass tube (5), the expansion-compensating device or bellows (6), the vessel (7), the vessel meaning the interface p...

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Abstract

Vacuum enhancing system or non-evaporable getter of the type used en solar-receptor vacuum tubes which comprises a series of non-evaporable getter material pads the geometry of which is that of a prism with rounded corners and said pads are drilled through the centre thereof and linked by means of a cable ending in a quick-fit closure that allows the fitting thereof to be automated. This system is placed downstream of the expansion-compensating device in the form of non-radial bellows in the longitudinal direction and in the void defined by the vessel that is the interface part between the absorber tube and the expansion-compensating device. A getter system is placed in a radial arrangement, at each of the two ends of the receptor tube, resulting in a receptor tube of completely symmetrical geometry.

Description

TECHNICAL FIELD OF THE INVENTION[0001]The present invention describes a vacuum enhancing system or non-evaporable getter for solar power receptor tubes.BACKGROUND OF THE INVENTION[0002]The getters are solid materials, alloys of different metals, able to chemically absorb gas molecules on their surface. They are widely used for a variety of applications such as in particle accelerators, vacuum tubes, inert gas purification systems, etc.[0003]The non-evaporable getter of the invention will be used in a vacuum tube of the type of those that are used as solar receptors. In general, these receptors consist of two concentric tubes between which the vacuum is generated. The inner tube, through which the fluid that is heated flows, is made of metal and the outer tube is made of glass, usually borosilicate.[0004]Between both tubes is placed an expansion-compensating device in the form of bellows, such that it allows the relative movement between the absorber tube and the glass tube, absorbin...

Claims

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Application Information

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IPC IPC(8): F04B37/02F24S10/40
CPCF24J2/055F24J2/4612F24J2/4616H01J7/186F24J2002/4681Y02E10/44F24J2/4636F24S10/45F24S40/40F24S40/46F24S40/80F24S2025/6013F24S10/40F24S80/00
Inventor MARTINEZ SANZ, NOELIAASENSIO PEREZ ULLIVARRI, JAVIERBOMBIN ORTEGA, PABLO JOSEPELAEZ FOMBELLIDA, JAVIERRICO SANCHEZ, JOSE NGELCRISTOBAL RAMIREZ, DANIEL
Owner ABENGOA SOLAR NEW TECH SA
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