Unlock instant, AI-driven research and patent intelligence for your innovation.

Vacuum tube for solar collectors with improved heat transfer

A solar collector and vacuum tube technology, applied in the field of vacuum tubes, can solve problems such as different thermal expansions

Inactive Publication Date: 2008-06-11
SGL CARBON SE
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Another problem is the different thermal expansion of copper and aluminum when using aluminum heat conducting sheets and copper heat transfer tubes

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Vacuum tube for solar collectors with improved heat transfer
  • Vacuum tube for solar collectors with improved heat transfer
  • Vacuum tube for solar collectors with improved heat transfer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Among Fig. 2 and 3, the present invention comprises U-shaped heat-carrying tube 5 ', 5 " by means of a Sydney collector and shows two principle schemes by way of example, but the present invention is not limited to this. Also can make heat-carrying liquid conducting Through a concentric tube or a tube flowing from the bottom up, or use a heat pipe.

[0023] In a first variant of the invention ( FIG. 2 ), the support structure and the heat transfer tubes are wrapped on their surfaces facing the inner walls of the absorber tubes 2 with a graphite film, which creates a form-lock between the absorber tubes 2 and the heat transfer tubes. fit thermally conductive contacts. The support structure itself is not shown in Figure 2 for the sake of clarity. Heat-conducting foils are no longer required here, thereby reducing the weight of the collector tube.

[0024] It is known from sealing technology that graphite foils are easily adapted to the surfaces to be sealed and thus com...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Heat transfer between an absorber and heat carrier tubes (5', 5'', 5''', 5'''') is simplified by using heat guiding elements (9, 10) which are made of compressed graphite expandate in vacuum tubes for solar collectors. The heat guiding element (9, 10) which is made of compressed graphite expandate can, for example, be embodied in a positive fit as an intermediate layer between an absorber internal wall and the carrier construction (4) which can receive the heat carrier tubes (5', 5'', 5''', 5'''') or as a heat transfer component (10) which is fitted into the absorber tube and which receives the heat carrier tubes (5', 5'', 5''', 5'''') in a positive fit.

Description

technical field [0001] This invention relates to vacuum tubes for solar collectors. Background technique [0002] A known form of construction of evacuated tube solar collectors (FIG. 1) consists of so-called Sydney tubes. Wherein it involves a double-walled glass container as a hot pot, comprising two concentric, mutually inserted glass tubes 1 and 2, which are hemispherically closed at one end and fused to each other at the other end (in the cross-sectional view of FIG. 1 is invisible). The tightly closed gap 3 between the glass tubes is evacuated to avoid heat loss. [0003] In the interior of the glass tube 2 , which is not evacuated, there is a heat transfer tube, for example a U-tube, supported in a support structure 4 , through which a heat transfer liquid flows. The cross-sectional view in Figure 1 shows the two side legs 5', 5" of the U-shaped tube for the inflow of heated heat-carrying liquid to be heated and outflow to a heat exchanger or heat accumulator. Usua...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/05F28F21/02F28F13/00F24S10/40F24S10/70F24S10/95
CPCY02E10/44F24J2002/469F28F13/00F24J2/055F28F21/02F24S10/45F24S2080/014
Inventor D·霍伊尔W·齐默利W·古克特
Owner SGL CARBON SE