CN109812997B - A solar cavity heat absorber with heat storage integrated with the flow channel and cavity wall - Google Patents
A solar cavity heat absorber with heat storage integrated with the flow channel and cavity wall Download PDFInfo
- Publication number
- CN109812997B CN109812997B CN201910216347.2A CN201910216347A CN109812997B CN 109812997 B CN109812997 B CN 109812997B CN 201910216347 A CN201910216347 A CN 201910216347A CN 109812997 B CN109812997 B CN 109812997B
- Authority
- CN
- China
- Prior art keywords
- heat absorber
- flow channel
- heat
- working medium
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000006096 absorbing agent Substances 0.000 title claims abstract description 115
- 238000005338 heat storage Methods 0.000 title claims abstract description 47
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 49
- 230000002093 peripheral effect Effects 0.000 claims description 22
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 5
- 239000012774 insulation material Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 238000010146 3D printing Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims 2
- 230000010354 integration Effects 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 239000011232 storage material Substances 0.000 abstract description 5
- 238000004146 energy storage Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 18
- 239000002184 metal Substances 0.000 description 10
- 238000009826 distribution Methods 0.000 description 5
- 230000005855 radiation Effects 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 230000002277 temperature effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
Landscapes
- Engine Equipment That Uses Special Cycles (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
本发明公开了一种流道与腔壁一体化的带储热太阳能腔体吸热器，包括吸热体、工质流入管及工质流出管；所述的吸热体是一端开口的圆柱形腔体结构，开口的一端用于接收来自于太阳能聚光器聚集的太阳光能；所述的吸热体的侧壁内设有工质流道；工质流道的一端与工质流入管连通，另一端与工质流出管连通；工质流入管及工质流出管安装在吸热体上；所述的吸热体外侧设有环形腔体空间，环形腔体空间内填充有相变储热介质。本发明既实现了腔体壁面的吸收太阳光能与加热工质的功能集成，又在环形腔体内填充相变储热材料，实现了热能存储，本发明还具有结构简单，操作方便，光‑热转换效率高、安全可靠的优点。
The invention discloses a solar cavity heat absorber with heat storage in which the flow channel and the cavity wall are integrated, including a heat absorber, a working medium inflow pipe and a working medium outflow pipe; the heat absorber is a cylinder with one end open. Shape cavity structure, one end of the opening is used to receive solar energy collected from the solar concentrator; a working medium flow channel is provided in the side wall of the heat absorber; one end of the working medium flow channel is connected to the inflow of the working medium The other end is connected to the working medium outflow pipe; the working medium inflow pipe and the working medium outflow pipe are installed on the heat absorber; an annular cavity space is provided outside the heat absorber, and the annular cavity space is filled with phase Change heat storage medium. The invention not only realizes the functional integration of absorbing solar energy and heating working medium on the cavity wall, but also fills the annular cavity with phase change heat storage materials to realize thermal energy storage. The invention also has the advantages of simple structure, convenient operation, light- It has the advantages of high thermal conversion efficiency, safety and reliability.
Description
技术领域Technical field
本发明涉及太阳能聚光集热利用领域，特别涉及一种流道与腔壁一体化的带储热太阳能腔体吸热器。The invention relates to the field of solar concentration and heat utilization, and in particular to a solar cavity heat absorber with heat storage integrating a flow channel and a cavity wall.
背景技术Background technique
聚光太阳能热发电技术通过大面积聚光器将太阳光能聚集到腔体吸热器内并加热其内部流体工质，然后通过热力循环过程驱动发电机组进行发电，它是太阳能热利用的重要形式之一，也被认为是开发和利用清洁环保的太阳能资源来解决能源短缺和环境污染的重要途径。Concentrated solar thermal power generation technology uses a large-area concentrator to concentrate solar energy into a cavity heat absorber and heat its internal fluid working medium, and then drives the generator set to generate electricity through a thermodynamic cycle process. It is an important step in solar thermal utilization. One of the forms, it is also considered to be an important way to develop and utilize clean and environmentally friendly solar resources to solve energy shortages and environmental pollution.
吸热器是太阳能热发电系统中光-热能量转换的核心装置，它将接收的高密度太阳光能用于加热流体工质。传统的吸热器通常是由金属盘管(管内工质换热)安装在腔体结构内来吸收太阳光能并转化为热能，即金属盘管用于吸收太阳辐射能并加热管内的流动工质。由于实际运行中金属盘管表面能流密度大且分布不均匀，易形成温度分布不均匀且梯度大等不利问题，进而导致其内应力增加(尤其当运行于高压环境时)，甚至有高温热斑产生烧穿问题。这些均直接影响着吸热器的光热转换效率和运行安全性。另外一方面，金属盘管式吸热器无法与储热介质直接一体化设计，通常需要另外设计储热罐，所以会增加其复杂度和生产成本。The heat absorber is the core device for light-to-heat energy conversion in the solar thermal power generation system. It uses the high-density solar energy it receives to heat the fluid working medium. Traditional heat absorbers are usually made of metal coils (heat exchange of working fluid in the tube) installed in the cavity structure to absorb solar energy and convert it into heat energy. That is, the metal coil is used to absorb solar radiation energy and heat the flow process in the tube. quality. Due to the large surface energy flow density and uneven distribution of metal coils in actual operation, it is easy to cause unfavorable problems such as uneven temperature distribution and large gradients, which in turn leads to an increase in internal stress (especially when operating in a high-pressure environment), and even high-temperature heat. Spots cause burn-through problems. These directly affect the photothermal conversion efficiency and operational safety of the heat absorber. On the other hand, the metal coil heat absorber cannot be directly integrated with the heat storage medium and usually requires the design of a separate heat storage tank, which increases its complexity and production cost.
发明内容Contents of the invention
为了解决上述技术问题，本发明提供一种结构简单，操作方便、光-热转换效率高、安全可靠的流道与腔壁一体化的带储热太阳能腔体吸热器，它既实现了腔体壁面的吸收太阳光能与加热工质的功能集成，又在环形腔体内填充相变储热材料，实现了热能存储。In order to solve the above technical problems, the present invention provides a solar cavity heat absorber with heat storage that is simple in structure, easy to operate, has high light-to-heat conversion efficiency, is safe and reliable, and integrates the flow channel and the cavity wall. The function of absorbing solar energy on the body wall is integrated with the heating working medium, and the annular cavity is filled with phase change heat storage materials to achieve thermal energy storage.
本发明解决上述问题的技术方案是：The technical solution of the present invention to solve the above problems is:
一种流道与腔壁一体化的带储热太阳能腔体吸热器，包括吸热体、工质流入管及工质流出管；所述的吸热体是一端开口的圆柱形腔体结构，开口的一端用于接收来自于太阳能聚光器聚集的太阳光能；所述的吸热体的侧壁内设有工质流道；工质流道的一端与工质流入管连通，另一端与工质流出管连通；工质流入管及工质流出管安装在吸热体上；所述的吸热体外侧设有环形腔体空间，环形腔体空间内填充有相变储热介质。A solar cavity heat absorber with heat storage integrated with the flow channel and the cavity wall, including a heat absorber, a working medium inflow pipe and a working medium outflow pipe; the heat absorber is a cylindrical cavity structure with one end open , one end of the opening is used to receive solar energy collected from the solar concentrator; a working medium flow channel is provided in the side wall of the heat absorber; one end of the working medium flow channel is connected to the working medium inflow pipe, and the other end is connected to the working medium inflow pipe. One end is connected to the working medium outflow pipe; the working medium inflow pipe and the working medium outflow pipe are installed on the heat absorber; an annular cavity space is provided outside the heat absorber, and the annular cavity space is filled with a phase change heat storage medium .
上述的流道与腔壁一体化的带储热太阳能腔体吸热器中，所述的吸热体为整体式结构，吸热体侧壁内设有螺旋状的螺旋流道孔Ⅰ，吸热体底板中设有螺旋状的螺旋流道孔Ⅱ，螺旋流道孔Ⅰ与螺旋流道孔Ⅱ连通，形成工质流道。In the above-mentioned solar cavity heat absorber with heat storage that integrates the flow channel and the cavity wall, the heat absorber has an integral structure, and a spiral spiral flow channel hole I is provided in the side wall of the heat absorber. The bottom plate of the heating body is provided with a spiral spiral flow channel hole II, and the spiral flow channel hole I is connected with the spiral flow channel hole II to form a working medium flow channel.
上述的流道与腔壁一体化的带储热太阳能腔体吸热器中，所述的吸热体包括管状体、前盖板和后盖板；管状体侧壁内设有多个沿轴向设置的竖向流道孔，多个竖向流道孔沿圆周方向均布；管状体的前端设有前盖板，后端设有后盖板；前盖板是一个内孔半径小于等于管状体的内孔半径的环形结构，前盖板上设置有多个腰形沉槽Ⅰ，多个腰形沉槽Ⅰ沿竖向流道孔所在的圆周均匀布置；所述的后盖板上设有多个腰形沉槽Ⅱ，多个腰形沉槽Ⅱ沿竖向流道孔所在的圆周均匀布置；腰形沉槽Ⅰ和腰形沉槽Ⅱ错位布置，将多个竖向流道孔连接成工质流道孔；后盖板上相邻的两腰形沉槽Ⅱ分别连接工质流入管和工质流出管。In the above-mentioned solar cavity heat absorber with heat storage integrated with the flow channel and the cavity wall, the heat absorber includes a tubular body, a front cover and a rear cover; the side wall of the tubular body is provided with a plurality of along the axis. Vertical flow channel holes are provided in the direction, and multiple vertical flow channel holes are evenly distributed along the circumferential direction; the front end of the tubular body is provided with a front cover plate, and the rear end is provided with a rear cover plate; the front cover plate is an inner hole with a radius of less than or equal to The annular structure of the inner hole radius of the tubular body is provided with a plurality of waist-shaped sinking grooves I on the front cover, and the plurality of waist-shaped sinking grooves I are evenly arranged along the circumference of the vertical flow channel hole; the back cover is provided with a plurality of waist-shaped sinking grooves I. There are multiple waist-shaped sinking troughs II, and multiple waist-shaped sinking troughs II are evenly arranged along the circumference of the vertical flow channel hole; the waist-shaped sinking troughs I and waist-shaped sinking troughs II are arranged in a staggered manner, and the multiple vertical flow channels are The holes are connected to form the working medium flow channel hole; the two adjacent waist-shaped sinking grooves II on the back cover are connected to the working medium inflow pipe and the working medium outflow pipe respectively.
上述的流道与腔壁一体化的带储热太阳能腔体吸热器中，所述的吸热体外侧设有管状结构的外围板，外围板的两端分别通过前封板和后封板与吸热体连接，前封板和后封板均为环状结构，前封板内孔半径不大于吸热体的内孔半径，后封板的内孔半径等于吸热体的外圆半径；前封板和后封板的外圆半径与外围板的外径相同；吸热体、外围板、前封板和后封板共同围成环形腔体空间，前封板上设有与环形腔体空间连通的进料口。相变储热介质由此进料口供给到环形腔体空间内。In the above-mentioned solar cavity heat absorber with heat storage that integrates the flow channel and the cavity wall, a peripheral plate with a tubular structure is provided outside the heat absorber, and the two ends of the peripheral plate pass through the front sealing plate and the rear sealing plate respectively. Connected to the heat absorber, the front sealing plate and the rear sealing plate are annular structures. The inner hole radius of the front sealing plate is not greater than the inner hole radius of the heat absorber. The inner hole radius of the rear sealing plate is equal to the outer radius of the heat absorber. ;The outer radius of the front sealing plate and the rear sealing plate is the same as the outer diameter of the peripheral plate; the heat absorber, the peripheral plate, the front sealing plate and the rear sealing plate together form an annular cavity space, and the front sealing plate is provided with an annular The feed port is connected to the cavity space. The phase change heat storage medium is supplied into the annular cavity space through this feed port.
上述的流道与腔壁一体化的带储热太阳能腔体吸热器中，所述的吸热体的外壁上焊接有多个换热翅片，多个换热翅片沿圆周方向均布，换热翅片位于环形腔体空间内。In the above-mentioned solar cavity heat absorber with heat storage that integrates the flow channel and the cavity wall, multiple heat exchange fins are welded on the outer wall of the heat absorber, and the multiple heat exchange fins are evenly distributed along the circumferential direction. , the heat exchange fins are located in the annular cavity space.
上述的流道与腔壁一体化的带储热太阳能腔体吸热器中，所述的换热翅片是截面为矩形或三角形柱状结构；换热翅片的截面为三角形时，尖角指向外部；换热翅片的高度与吸热体的相同。In the above-mentioned solar cavity heat absorber with heat storage integrated with the flow channel and the cavity wall, the heat exchange fins have a rectangular or triangular columnar cross-section; when the heat exchange fins have a triangular cross-section, the sharp corners point toward External; the height of the heat exchange fins is the same as that of the heat absorber.
上述的流道与腔壁一体化的带储热太阳能腔体吸热器中，所述的吸热体的内表面涂覆有对太阳光能有高效吸收效果的耐高温涂层；所述的外围板和吸热体的底板的外侧均包裹有保温材料。In the above-mentioned solar cavity heat absorber with heat storage that integrates the flow channel and the cavity wall, the inner surface of the heat absorber is coated with a high-temperature resistant coating that has an efficient absorption effect on solar energy; The outer sides of the peripheral plate and the bottom plate of the heat absorber are wrapped with insulation materials.
上述的流道与腔壁一体化的带储热太阳能腔体吸热器中，所述的吸热体的前端开口处设有透明的石英玻璃。In the above-mentioned solar cavity heat absorber with heat storage in which the flow channel and the cavity wall are integrated, a transparent quartz glass is provided at the front opening of the heat absorber.
上述的流道与腔壁一体化的带储热太阳能腔体吸热器中，所述的吸热体内的螺旋流道孔通过3D打印方式加工。In the above-mentioned solar cavity heat absorber with heat storage in which the flow channel and the cavity wall are integrated, the spiral flow channel hole in the heat absorber is processed by 3D printing.
上述的流道与腔壁一体化的带储热太阳能腔体吸热器中，所述的相变储热介质采用的是熔融盐储热介质。In the above-mentioned solar cavity heat absorber with heat storage integrated with the flow channel and the cavity wall, the phase change heat storage medium is a molten salt heat storage medium.
与现有技术相比，本发明的有益效果是：Compared with the prior art, the beneficial effects of the present invention are:
本发明结构简单，操作方便，且将用于工质流动的流道设置在腔式吸热体的壁面中，实现了腔体壁面的吸收太阳光能与加热工质的功能集成；即使在吸热器内表面聚焦能流分布不均匀情况，由于金属体的高导热性能，也能使各区域的温度梯度减小，具有均温效果；而且，在腔式吸热体的外侧增加一个填充相变储热材料的环形腔体，实现了热能的存储。整体结构实现了加热工质和过多热能的直接存储与再次利用等功能的集成，本发明还具有光-热转换效率高、安全可靠的优点。The invention has a simple structure and is easy to operate. The flow channel for the flow of working fluid is arranged in the wall of the cavity heat absorber, thereby realizing the function integration of absorbing solar energy and heating the working fluid on the cavity wall; even when absorbing In the case of uneven distribution of focused energy flow on the inner surface of the heater, due to the high thermal conductivity of the metal body, the temperature gradient in each area can also be reduced, with a uniform temperature effect; moreover, a filling phase is added outside the cavity heat absorber The annular cavity of variable heat storage material realizes the storage of thermal energy. The overall structure realizes the integration of functions such as direct storage and reuse of heating working fluid and excess thermal energy. The invention also has the advantages of high light-to-heat conversion efficiency, safety and reliability.
附图说明Description of the drawings
图1是本发明实施例1的轴测图Figure 1 is an isometric view of Embodiment 1 of the present invention.
图2是图1中吸热体与翅片的剖视图Figure 2 is a cross-sectional view of the heat absorber and fins in Figure 1
图3是本发明实施例1的外观图Figure 3 is an appearance view of Embodiment 1 of the present invention.
图4是本发明实施例2的轴测图Figure 4 is an isometric view of Embodiment 2 of the present invention.
图5是图4中吸热储热体的轴测图Figure 5 is an isometric view of the heat-absorbing heat storage body in Figure 4
图6是图4中后盖板的轴测图Figure 6 is an isometric view of the rear cover in Figure 4
图7是图4中前端板的轴测图Figure 7 is an isometric view of the front end plate in Figure 4
图中：1—进料口；2—前封板；3—吸热体；4—外围板；5—工质流入管；6—换热翅片；7—后封板；8—螺旋流道孔Ⅰ；9—工质流出管；10—前盖板；11—后盖板；12—管状体；13—竖向流道孔；14—腰形沉槽Ⅱ；15-腰形沉槽Ⅰ。In the picture: 1—feed port; 2—front sealing plate; 3—heat absorber; 4—peripheral plate; 5—working fluid inflow pipe; 6—heat exchange fins; 7—rear sealing plate; 8—spiral flow Hole I; 9—working fluid outflow pipe; 10—front cover; 11—rear cover; 12—tubular body; 13—vertical flow hole; 14—waisted sinker II; 15—waisted sinker Ⅰ.
具体实施方式Detailed ways
下面结合附图和实施例对本发明作进一步的说明。The present invention will be further described below in conjunction with the accompanying drawings and examples.
实施例1Example 1
如图1所示，本发明包括前封板2、吸热体3、外围板4、工质流入管5、换热翅片6、后封板7、螺旋流道孔8、工质流出管9。所述的吸热体3是一端开口的圆柱形腔体结构，开口的一端用于接收来自于太阳能聚光器聚集的太阳光能，开口处设有石英玻璃板，用于减小吸热体3的辐射和对流热损失。吸热体3内表面上涂覆有对太阳光能有高效吸收效果的耐高温涂层，底板的外侧包裹有保温材料，用于减小吸热体3的辐射和对流热损失。As shown in Figure 1, the present invention includes a front sealing plate 2, a heat absorber 3, a peripheral plate 4, a working medium inflow pipe 5, a heat exchange fin 6, a rear sealing plate 7, a spiral flow channel hole 8, and a working medium outflow pipe. 9. The heat absorber 3 is a cylindrical cavity structure with one end open. The open end is used to receive the solar energy collected from the solar concentrator. A quartz glass plate is provided at the opening to reduce the heat absorber. 3 Radiation and convection heat losses. The inner surface of the heat absorber 3 is coated with a high-temperature resistant coating that efficiently absorbs solar energy, and the outside of the bottom plate is wrapped with insulation material to reduce the radiation and convection heat loss of the heat absorber 3.
如图2所示，所述的吸热体3的侧壁内设有螺旋状的螺旋流道孔Ⅰ8，底板11内设置有螺旋状的螺旋流道孔Ⅱ，螺旋流道孔Ⅰ8的一端与工质流入管5连通，工质流入管5安装在吸热体3上；螺旋流道孔Ⅰ8的另一端与螺旋流道孔Ⅱ的一端连通，螺旋流道孔Ⅱ的另一端与工质流出管9连通，工质流出管9设置在底板上，实现工质从螺旋流道孔Ⅱ中流出至后续驱动热动装备。螺旋流道孔Ⅰ8和螺旋流道孔Ⅱ采用3D打印方式进行加工。上述特征实现了腔体壁面的吸收太阳光能与加热工质的功能集成，即使在吸热体内表面聚焦能流分布不均匀情况，由于金属体的高导热性能，也能使各区域的温度梯度减小，具有均温效果，进而降低热应力和辐射热损失。这是现有技术中金属盘管吸热器不具备的优点。另外一方面，采用本发明的吸热体可以简化现有太阳能聚光器反射镜面形的设计难度，即很容易实现吸热体内光滑壁面的能流均匀化设计。而以往的金属盘管吸热器很难做到能流均匀化，因为金属盘管形成的内腔表面总有一侧是无法直接接收聚集的太阳光能。As shown in Figure 2, the side wall of the heat absorber 3 is provided with a spiral spiral flow channel hole I8, and the bottom plate 11 is provided with a spiral spiral flow channel hole II. One end of the spiral flow channel hole I8 is connected to The working fluid inflow pipe 5 is connected, and the working fluid inflow pipe 5 is installed on the heat absorber 3; the other end of the spiral flow channel hole I8 is connected with one end of the spiral flow channel hole II, and the other end of the spiral flow channel hole II is connected with the working fluid outflow The pipes 9 are connected, and the working medium outflow pipe 9 is arranged on the bottom plate to realize the working medium flowing out from the spiral flow channel hole II to the subsequent driving thermal equipment. Spiral flow channel hole I8 and spiral flow channel hole II are processed using 3D printing. The above features realize the functional integration of solar energy absorption and heating working medium on the cavity wall. Even if the focused energy flow distribution on the surface of the heat absorber is uneven, due to the high thermal conductivity of the metal body, the temperature gradient in each area can be reduced. It has a uniform temperature effect, thereby reducing thermal stress and radiation heat loss. This is an advantage that metal coil heat absorbers in the prior art do not have. On the other hand, the use of the heat absorber of the present invention can simplify the design difficulty of the reflector shape of the existing solar concentrator, that is, it is easy to realize the energy flow uniformity design of the smooth wall surface of the heat absorber. In the past, it was difficult for metal coil heat absorbers to achieve uniform energy flow, because there is always one side of the inner cavity surface formed by the metal coil that cannot directly receive the concentrated solar energy.
如图2所示，所述的吸热体3外侧设有管状结构的外围板，外围板的两端分别通过前封板和后封板与吸热体3连接，前封板和后封板均为环状结构，前封板2内孔半径不大于吸热体3的内孔半径，但要大于太阳能聚光器聚集的聚焦光斑半径，这样可以减小光学损失和热损失。后封板的内孔半径等于吸热体3的外圆半径；前封板2和后封板的外圆半径与外围板4的外径相同；吸热体3、外围板、前封板和后封板共同围成环形腔体空间，前封板上设有与环形腔体空间连通的进料口1，用于导入相变储热介质，所述的进料口1内安装有密封堵头。环形腔体空间内填充有相变储热介质，所述的相变储热介质是太阳能热发电中常用的熔融盐储热介质。外围板4外侧包裹有保温材料，用于降低散热损失。这样通过在腔式吸热体的外侧增加一个填充相变储热材料的环形腔体，直接实现了多余热能的存储与再次利用等功能的集成，且结构简单、安全可靠。As shown in Figure 2, a peripheral plate with a tubular structure is provided on the outside of the heat absorber 3. The two ends of the peripheral plate are connected to the heat absorber 3 through the front sealing plate and the rear sealing plate respectively. The front sealing plate and the rear sealing plate They are all annular structures, and the radius of the inner hole of the front sealing plate 2 is not larger than the radius of the inner hole of the heat absorber 3, but is larger than the radius of the focused spot focused by the solar concentrator, which can reduce optical loss and heat loss. The inner hole radius of the rear sealing plate is equal to the outer radius of the heat absorber 3; the outer radius of the front sealing plate 2 and the rear sealing plate is the same as the outer diameter of the peripheral plate 4; the heat absorber 3, the peripheral plate, the front sealing plate and The rear sealing plates together form an annular cavity space, and the front sealing plate is provided with a feed port 1 connected to the annular cavity space for introducing phase change heat storage medium. A sealing plug is installed in the feed port 1. head. The annular cavity space is filled with a phase change heat storage medium, which is a molten salt heat storage medium commonly used in solar thermal power generation. The outside of the peripheral panel 4 is wrapped with thermal insulation material to reduce heat dissipation loss. In this way, by adding an annular cavity filled with phase change heat storage material on the outside of the cavity heat absorber, the integration of functions such as storage and reuse of excess heat energy is directly realized, and the structure is simple, safe and reliable.
所述的吸热体3的外壁面焊接有多个换热翅片6，多个换热翅片6沿圆周方向均匀布置，所述的换热翅片6是矩形截面或三角形截面的柱状结构；截面为三角形时，尖角指向外部。换热翅片6的高度与吸热体3的相同。换热翅片6位于外围板4内。这样可以提升热能存储和再次利用时的热能传递效率。A plurality of heat exchange fins 6 are welded to the outer wall surface of the heat absorber 3, and the plurality of heat exchange fins 6 are evenly arranged in the circumferential direction. The heat exchange fins 6 are columnar structures with a rectangular cross-section or a triangular cross-section. ; When the cross section is triangular, the sharp corners point outward. The height of the heat exchange fins 6 is the same as that of the heat absorber 3 . The heat exchange fins 6 are located in the peripheral plate 4 . This improves thermal energy transfer efficiency when storing and reusing thermal energy.
实施例2Example 2
如图4所示，与实施例1的结构相似，其不同于实施例1的地方在于吸热体3的结构不同。该实施例中，所述的吸热体3是由管状体12、前盖板10和后盖板11组成的是一端开口的圆柱形腔体结构。As shown in FIG. 4 , the structure is similar to that of Embodiment 1, but is different from Embodiment 1 in that the structure of the heat absorber 3 is different. In this embodiment, the heat absorber 3 is a cylindrical cavity structure with one end open, which is composed of a tubular body 12, a front cover 10 and a rear cover 11.
管状体12侧壁内设有多个竖向流道孔13，多个竖向流道孔13沿圆周方向均布，竖向流道孔13的截面几何形状可以是圆形、椭圆形、矩形和三角形等。A plurality of vertical flow channel holes 13 are provided in the side wall of the tubular body 12. The plurality of vertical flow channel holes 13 are evenly distributed along the circumferential direction. The cross-sectional geometry of the vertical flow channel holes 13 can be circular, oval, or rectangular. and triangles etc.
管状体12的前端设有前盖板10，后端设有后盖板11。前盖板10是一个内孔半径小于等于管状体12的内孔半径的环形结构，前盖板10上设置有多个腰形沉槽Ⅰ15，多个腰形沉槽Ⅰ15沿竖向流道孔13所在的圆周均匀布置；如图7所示。所述的后盖板11上设有多个腰形沉槽Ⅱ14，多个腰形沉槽Ⅱ14沿竖向流道孔13所在的圆周均匀布置；如图6所示。腰形沉槽Ⅱ14连通相邻的两个竖向流道孔13，腰形沉槽Ⅰ15也连通相邻的两个竖向流道孔13，腰形沉槽Ⅰ15和腰形沉槽Ⅱ14错位布置，将多个竖向流道孔13连接成一个工质流道孔。后盖板11上相邻的两腰形沉槽Ⅱ14分别连接工质流入管5和工质流出管9。由此可以实现工质从工质流入管5进入，而依次流过吸热体3的所有竖向流道孔13后，再从工质流出管9流出。盖板11的位于腔体内的表面涂覆有对太阳光能有高效吸收效果的耐高温涂层。在此结构中，需要确保后盖板11和前盖板10他们与吸热体3两个端面的连接密封性，防止工质的泄露。The front end of the tubular body 12 is provided with a front cover 10 and the rear end is provided with a rear cover 11 . The front cover 10 is an annular structure with an inner hole radius less than or equal to the inner hole radius of the tubular body 12. The front cover 10 is provided with a plurality of waist-shaped sinking grooves I15, and the plurality of waist-shaped sinking grooves I15 are arranged along the vertical flow channel holes. The circle where 13 is located is evenly arranged; as shown in Figure 7. The back cover 11 is provided with a plurality of waist-shaped sinking grooves II14, and the plurality of waist-shaped sinking grooves II14 are evenly arranged along the circumference of the vertical flow channel hole 13; as shown in Figure 6. The waist-shaped sinking trough II14 is connected to two adjacent vertical flow channel holes 13, and the waist-shaped sinking trough I115 is also connected to the two adjacent vertical flow channel holes 13. The waist-shaped sinking trough I15 and the waist-shaped sinking trough II14 are arranged in a staggered manner. , connect multiple vertical flow channel holes 13 into one working medium flow channel hole. The two adjacent waist-shaped sinking grooves II14 on the back cover 11 are connected to the working medium inflow pipe 5 and the working medium outflow pipe 9 respectively. In this way, the working fluid can enter from the working fluid inlet pipe 5 , flow through all the vertical flow channel holes 13 of the heat absorber 3 in sequence, and then flow out from the working fluid outflow pipe 9 . The surface of the cover plate 11 located in the cavity is coated with a high-temperature resistant coating that has an efficient absorption effect on solar energy. In this structure, it is necessary to ensure the tightness of the connection between the back cover 11 and the front cover 10 and the two end surfaces of the heat absorber 3 to prevent leakage of the working fluid.
本发明结构简单，通过将用于工质流动的流道设置在腔式吸热体的壁面中，不仅实现了腔体壁面的吸收太阳光能与加热工质的功能集成，而且可以在吸热器内表面聚焦能流分布不均匀情况，通过金属体的高导热性能，使各区域的温度梯度减小，具有均温效果；另外一方面，通过在腔式吸热体的外侧增加一个填充了相变储热材料的环形腔体，实现了加热工质和过多热能的直接存储与再次利用功能的集成。The invention has a simple structure. By arranging the flow channel for the flow of working fluid in the wall surface of the cavity heat absorber, it not only realizes the functional integration of the cavity wall surface to absorb solar energy and heat the working fluid, but also can absorb heat. The uneven distribution of focused energy flow on the inner surface of the device reduces the temperature gradient in each area through the high thermal conductivity of the metal body, which has a temperature equalization effect; on the other hand, by adding a filling layer outside the cavity heat absorber The annular cavity of phase change heat storage material realizes the integration of direct storage and reuse of heating working fluid and excess thermal energy.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910216347.2A CN109812997B (en) | 2019-03-21 | 2019-03-21 | A solar cavity heat absorber with heat storage integrated with the flow channel and cavity wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910216347.2A CN109812997B (en) | 2019-03-21 | 2019-03-21 | A solar cavity heat absorber with heat storage integrated with the flow channel and cavity wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109812997A CN109812997A (en) | 2019-05-28 |
| CN109812997B true CN109812997B (en) | 2023-11-10 |
Family
ID=66609799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910216347.2A Active CN109812997B (en) | 2019-03-21 | 2019-03-21 | A solar cavity heat absorber with heat storage integrated with the flow channel and cavity wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109812997B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110762855B (en) * | 2019-10-28 | 2024-04-02 | 湖南科技大学 | Solar heat absorber driven by wind power to rotate and translate and working method thereof |
| CN112902723B (en) * | 2020-12-25 | 2022-07-01 | 上海交通大学 | Spotlight melting normal position resource energy memory based on lunar soil 3D prints |
| CN113028660B (en) * | 2021-03-24 | 2024-09-13 | 湖南科技大学 | Solar cavity body heat receiver with adjustable inner cavity shape |
| CN113154708A (en) * | 2021-04-15 | 2021-07-23 | 东南大学 | Packed bed heat collection and storage device with cavity absorber |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4217882A (en) * | 1978-10-30 | 1980-08-19 | Feldman Karl T Jr | Passive solar heat collector |
| CN2758657Y (en) * | 2004-11-30 | 2006-02-15 | 张耀明 | Cavity type solar energy receiver |
| CN106196655A (en) * | 2016-09-06 | 2016-12-07 | 湖南科技大学 | A kind of solar energy thermal-power-generating displacement air heat extractor of many pocket surfaces |
| CN205919544U (en) * | 2016-07-26 | 2017-02-01 | 中国能源建设集团有限公司工程研究院 | Solar thermal energy electricity generation is with positive displacement pressure -bearing air heat absorber |
| CN108931064A (en) * | 2018-04-26 | 2018-12-04 | 福建工程学院 | A kind of cylinder solar energy high temperature energy storage and the heat dump that exchanges heat |
-
2019
- 2019-03-21 CN CN201910216347.2A patent/CN109812997B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4217882A (en) * | 1978-10-30 | 1980-08-19 | Feldman Karl T Jr | Passive solar heat collector |
| CN2758657Y (en) * | 2004-11-30 | 2006-02-15 | 张耀明 | Cavity type solar energy receiver |
| CN205919544U (en) * | 2016-07-26 | 2017-02-01 | 中国能源建设集团有限公司工程研究院 | Solar thermal energy electricity generation is with positive displacement pressure -bearing air heat absorber |
| CN106196655A (en) * | 2016-09-06 | 2016-12-07 | 湖南科技大学 | A kind of solar energy thermal-power-generating displacement air heat extractor of many pocket surfaces |
| CN108931064A (en) * | 2018-04-26 | 2018-12-04 | 福建工程学院 | A kind of cylinder solar energy high temperature energy storage and the heat dump that exchanges heat |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109812997A (en) | 2019-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109812997B (en) | A solar cavity heat absorber with heat storage integrated with the flow channel and cavity wall | |
| CN106050586B (en) | The gas body heat absorption method for electric generation using solar energy and device of feature based absorption spectrum | |
| CN102445008B (en) | Tower type solar water/steam composite plate-fin hot plate type heat absorber | |
| CN108954870B (en) | Solar high-temperature energy storage and heat exchange heat absorber | |
| CN105387634B (en) | A kind of jet-flow efficient heat exchange solar energy heat absorbing device | |
| CN102141301B (en) | Pipe-cavity integrated disc solar heat receiver | |
| CN104534688B (en) | A kind of two-stage solar heat absorber | |
| CN104061694B (en) | A kind of solar heat absorber of composite rib structure | |
| CN205373077U (en) | High -efficient heat transfer solar energy heat sink of efflux | |
| CN204388382U (en) | A kind of solar heat absorber with tube bank of extending | |
| CN202613802U (en) | High temperature heat accumulation and heat exchange device for solar thermal power generation | |
| CN209763517U (en) | A solar cavity heat absorber with heat storage integrated with flow channel and cavity wall | |
| CN210374116U (en) | A solar-gas heating cavity receiver with heat storage | |
| CN102927697B (en) | High-pressure-bearing tower type solar water/molten salt composite flat-tube type hot plate heat absorber | |
| CN111156712A (en) | Double-sided heat collection composite solar heat absorber and method | |
| CN216592289U (en) | A molten salt jet heat absorber based on tower solar concentrating | |
| CN215930660U (en) | Phase-change heat storage heat exchanger | |
| CN206247929U (en) | A kind of phase change thermal storage heat exchanger of fin and tube type structure | |
| CN110500794B (en) | Solar energy/fuel gas complementary heat supply/heat storage integrated solar energy cavity receiver | |
| CN205352161U (en) | Solar energy fused salt phase -change thermal ware | |
| CN109813169B (en) | Elastic tube bundle vibration enhanced heat exchange type solar cavity heat absorber | |
| CN102788433B (en) | Solar thermal collector and water heater | |
| CN210688783U (en) | Novel heat absorber assembly for tower type photo-thermal power generation | |
| CN209639288U (en) | V-shaped heat-absorbing cavity solar absorber with heat storage function | |
| CN103017367B (en) | Tower type solar composite plate-fin hot plate type heat absorber with novel supporting structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |