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A stacked solar cavity heat absorber

A heat absorber, stacked technology, applied in the field of solar thermal utilization, can solve the problems of cavity heat absorber solar radiation absorption dead zone, high local temperature of metal heat exchange tubes, etc., to solve burn-through and improve utilization rate Effect

Active Publication Date: 2020-02-07
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a stacked solar cavity heat absorber to solve the problems caused by the use of spiral metal heat exchange tubes in the existing cavity heat absorber. There are problems such as solar radiation absorption dead zone and excessive local temperature of metal heat exchange tubes in the body heat sink.

Method used

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  • A stacked solar cavity heat absorber
  • A stacked solar cavity heat absorber
  • A stacked solar cavity heat absorber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] see figure 1 and figure 2 , the present embodiment provides a stacked solar cavity heat absorber, including a cavity shell 1, and the cavity shell 1 is a lower open shell;

[0035] It should be noted that, in the actual application of the cavity heat absorber, the lower opening is the light inlet, and the sunlight will shine into the interior of the cavity heat absorber through the light inlet;

[0036] Specifically, a first medium distribution pipe 2 and a second medium distribution pipe 3 are provided inside the cavity shell 1; An annular heat exchange tube assembly 4; insulation cotton 5 is filled between the cavity shell 1 and the heat exchange tube assembly 4;

[0037] Wherein, the thermal insulation cotton 5 can be slag wool, rock wool, or other materials with thermal insulation function, and in this embodiment, the thermal insulation cotton 5 mainly adopts slag cotton; Moth, low price, corrosion resistance, good chemical stability, good sound absorption perfo...

Embodiment 2

[0055] see image 3 , on the basis of Embodiment 1, this embodiment makes the following optimizations:

[0056] The thermal insulation cotton 5 is attached with a reflection device 10 at the gap between the two heat exchange tube assemblies 4; , reflected to the heat exchange tube assembly 4 again;

[0057] The reflective device 10 can be a reflective mirror or a plate coated with a reflective coating or a plate with a reflective film attached to the surface.

[0058] It can be understood that most of the sunlight entering from the daylight opening is directly absorbed by the heat exchange medium in the heat exchange tube assembly 4 or the heat exchange coil 7 and converted into heat energy, but in practical applications, there will be Part of the light will pass through the heat exchange tube assembly 4, and the function of the reflection device 10 is to reflect the part of the light, so that the part of the light is irradiated on the heat exchange tube assembly 4 or the he...

Embodiment 3

[0060] see Figure 4 , on the basis of Embodiment 1, this embodiment makes the following optimizations:

[0061] A heat storage device 11 is also provided between the heat exchange tube assembly 4 and the thermal insulation cotton 5, and the heat storage device 11 is used to store excess radiant heat.

[0062] It can be understood that the heat storage device 11 can store the abundant radiant heat of the heat exchange tube assembly 4 or the heat exchange coil 7 when the solar irradiance condition is good and the light is strong. Under normal circumstances, the heat storage device 11 releases the stored heat, thereby heating the heat exchange medium in the heat exchange tube assembly 4 or the heat exchange coil 7, reducing the thermal inertia of the cavity heat absorber, and further improving the cavity Efficiency of the body heat sink.

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Abstract

The invention discloses a laminated solar cavity heat absorber. The laminated solar cavity heat absorber comprises a cavity outer shell, a first medium separation pipe, a second medium separation pipe, heat exchange pipe modules, an insulation cotton, a flow control device and a heat exchange coil. Through cooperation of the two medium separation pipes, the heat exchange coil and the multiple laminated heat exchange pipe modules, the cavity heat absorber realizes the separation function of heat exchange mediums; when one of the heat exchange pipe modules is higher in temperature due to sunlight radiation, the flow control device can correspondingly increase the flow and the flowing speed of the heat exchange mediums, and heat of the heat exchange pipe module is taken away in time, so thatthe problems of burnthrough of heat exchange pipes and internal corrosion caused by higher local temperature of the cavity heat absorber are effectively solved; and moreover, the blank of the heat exchange pipe modules can be filled up through the heat exchange coil arranged above the heat exchange pipe modules, so that the problem of the absorption dead area of the sunlight radiation of spiral metal heat exchange pipes is solved, and the cavity heat absorber can further improve the utilization rate of sunlight.

Description

technical field [0001] The invention relates to the technical field of solar photothermal utilization, in particular to a stacked solar cavity heat absorber. Background technique [0002] Solar energy is a clean and environmentally friendly renewable energy, and solar thermal utilization technology has always been a hot research direction. However, because the energy flux density of solar radiation is too low, it is generally not convenient to use directly, so people often gather a large area of ​​sunlight through photothermal energy conversion devices, and then convert these sunlight into photothermal energy, thereby Carry out the utilization of heat exchange or power generation in the next step. Among them, the cavity heat absorber is the core component of the photothermal energy conversion device, which has an important influence on the operation of the entire photothermal energy conversion device, and it mainly plays the role of collecting sunlight and conducting heat. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24S10/30F24S70/25F24S50/00F24S80/65
CPCY02E10/44
Inventor 王海唐军黄金陈木生李浩腾卢梓键
Owner GUANGDONG UNIV OF TECH