CN203249409U - An inner concentrating light heat pipe type vacuum heat collecting tube - Google Patents

An inner concentrating light heat pipe type vacuum heat collecting tube Download PDF

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CN203249409U
CN203249409U CN2013202427017U CN201320242701U CN203249409U CN 203249409 U CN203249409 U CN 203249409U CN 2013202427017 U CN2013202427017 U CN 2013202427017U CN 201320242701 U CN201320242701 U CN 201320242701U CN 203249409 U CN203249409 U CN 203249409U
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heat pipe
metal heat
type vacuum
glass outer
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徐刚
史继富
王雷雷
熊斌
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Tibet Zhongke Sunshine New Energy Polytron Technologies Inc
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Guangzhou Institute of Energy Conversion of CAS
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Abstract

本实用新型公开了一种内聚光热管式真空集热管,其包括玻璃外管和金属热管,所述金属热管套装于玻璃外管内且二者同轴,金属热管和玻璃外管之间形成真空层,所述玻璃外管具有径向截面为复合抛物线或单抛物线或圆渐开线的聚光面,所述聚光面上设置有反光层,且该聚光面的焦点落在金属热管的外表面。本实用新型采用具有聚光面为复合抛物面、单抛物面或圆渐开面的玻璃外管,并在聚光面上放置柔性反光材料或直接沉积反光层,聚光面在玻璃外管的生产过程中就固定成型,因此不需要内插额外的聚光装置,提高了生产效率,降低了生产成本。同时反光层可将95%以上的太阳光反射到焦点位置,进一步提升了金属热管的吸收效率,提高了金属热管中工质的温度。

Figure 201320242701

The utility model discloses an inner concentrating light heat pipe type vacuum heat collecting pipe, which comprises a glass outer pipe and a metal heat pipe. Vacuum layer, the glass outer tube has a concentrating surface with a radial section of a compound parabola or a single parabola or a circular involute, the concentrating surface is provided with a reflective layer, and the focus of the concentrating surface falls on the metal heat pipe of the outer surface. The utility model adopts a glass outer tube with a light-gathering surface as a compound paraboloid, a single paraboloid or a circular involute surface, and places a flexible reflective material on the light-gathering surface or directly deposits a reflective layer. The light-gathering surface is in the production process of the glass outer tube It is fixed and formed in the middle, so there is no need to insert an additional light-gathering device, which improves production efficiency and reduces production costs. At the same time, the reflective layer can reflect more than 95% of the sunlight to the focus position, which further improves the absorption efficiency of the metal heat pipe and increases the temperature of the working fluid in the metal heat pipe.

Figure 201320242701

Description

一种内聚光热管式真空集热管An inner concentrating light heat pipe type vacuum heat collecting tube

技术领域technical field

本实用新型涉及太阳能热利用技术领域,尤其是一种内聚光热管式真空集热管。The utility model relates to the technical field of solar heat utilization, in particular to an inner concentrating heat pipe type vacuum heat collecting pipe.

背景技术Background technique

太阳能热水器是当前太阳能低温应用领域最典型的一种技术。截止2010年底,世界热水器保有量达1.875亿m2,其中中国保有量达1.5亿m2,占世界的80%,是全球太阳能热能利用最多的国家,其在2008年和2009年的年产量分别达到3100万m2和4200万m2,分别较上年增加32.5%和35.5%。Solar water heater is the most typical technology in the field of low temperature application of solar energy. By the end of 2010, the world's water heaters had reached 187.5 million m 2 , of which China had 150 million m 2 , accounting for 80% of the world. It is the country that utilizes the most solar thermal energy in the world. Its annual output in 2008 and 2009 was Reached 31 million m 2 and 42 million m 2 , an increase of 32.5% and 35.5% over the previous year respectively.

全玻璃真空管热水器是我国太阳能热水器的主流,占市场份额的90%以上。随着全球太阳能建筑一体化趋势的发展,全玻璃真空管热水器的易破损、易结垢、安装复杂、难与建筑结合等缺点暴露出来。目前高层建筑上普遍采用的为平板集热器,但是这种集热方式存在热效率低的缺点。热管式真空集热管集中了上述两种集热方式的长处,具有以下优点:(1)热容量小,启动传热迅速,即使在多云间晴的低日照条件下也能迅速启动,有效收集热量,所以即使对于日照条件不太高的地区也可有效使用,应用地区很广。(2)由于被加热的工质不直接流入真空管内,所以系统管路可承受较高工作压力,承压能力很强。(3)用热管传输热量,真空管内无水,且热管本身就具有了抗冻防过热的性能,这就防止了管子在无负荷情况下带来的高温问题及在高寒地区的结冰冻裂问题。(4)安装简便,运行可靠:管子和联箱是“干性连接”,无热水泄漏问题,安装方便,即使有一根热管出现问题,在维修过程中也不会影响整个系统的正常使用。因此热管式真空集热管具有良好的发展前景。All-glass vacuum tube water heaters are the mainstream of solar water heaters in my country, accounting for more than 90% of the market share. With the development of the global trend of building integrated solar energy, the disadvantages of all-glass vacuum tube water heaters such as easy damage, easy scaling, complicated installation, and difficulty in combining with buildings have been exposed. At present, flat plate heat collectors are commonly used in high-rise buildings, but this heat collection method has the disadvantage of low thermal efficiency. The heat pipe vacuum heat collection tube combines the advantages of the above two heat collection methods, and has the following advantages: (1) small heat capacity, rapid start-up heat transfer, even in cloudy and sunny low sunshine conditions, it can start quickly and effectively collect heat. Therefore, it can be effectively used even in areas where the sunshine conditions are not too high, and the application area is very wide. (2) Since the heated working fluid does not directly flow into the vacuum tube, the system pipeline can withstand high working pressure and has a strong pressure bearing capacity. (3) The heat pipe is used to transfer heat, there is no water in the vacuum pipe, and the heat pipe itself has the performance of anti-freezing and overheating, which prevents the high temperature problem caused by the pipe under no load and the problem of freezing and cracking in the alpine region . (4) Easy installation and reliable operation: pipes and headers are "dry connections", no hot water leakage, easy installation, even if there is a problem with one heat pipe, it will not affect the normal use of the entire system during maintenance. Therefore, the heat pipe vacuum heat collector has a good development prospect.

将聚光系统引入热管式真空集热管中,可以进一步提高光热转化效率并得到更高温的热水和蒸汽。外聚光的方式由于聚光器暴露在空气中易氧化、易积灰、易变形且成本较高,所以未能推广应用。现有技术中,公开号为CN2360800Y公开了一种内聚光热管式真空管,其是在真空玻璃管中插入曲面反射镜来实现内聚光,如镜面铝或镜面不锈钢等,这样的设计不仅增加了产品的制造成本,还大大降低了生产效率。Introducing the concentrating system into the heat pipe vacuum heat collection tube can further improve the light-to-heat conversion efficiency and obtain higher temperature hot water and steam. The external concentrating method has not been popularized and applied because the concentrator is easy to oxidize, accumulate dust, deform and have high cost when it is exposed to the air. In the prior art, the publication number is CN2360800Y, which discloses a heat pipe type vacuum tube with inner light concentrating, which is to insert a curved reflector into the vacuum glass tube to realize inner light focus, such as mirror aluminum or mirror stainless steel, etc., such a design not only The manufacturing cost of the product has been increased, and the production efficiency has also been greatly reduced.

实用新型内容Utility model content

为了解决上述问题,本实用新型提供一种内聚光热管式真空集热管,其玻璃外管为复合抛物面、单抛物面或圆的渐开面结构,这种设计提高了生产效率,降低了生产成本。同时聚光面的反光层可将95%以上的太阳光反射到焦点位置,进一步提升了金属热管的吸收效率,提高了金属热管中工质的温度。In order to solve the above-mentioned problems, the utility model provides an inner concentrating heat pipe type vacuum heat collecting tube, the glass outer tube of which is a compound paraboloid, single paraboloid or circular involute surface structure, this design improves production efficiency and reduces production cost. At the same time, the reflective layer on the concentrating surface can reflect more than 95% of the sunlight to the focus position, which further improves the absorption efficiency of the metal heat pipe and increases the temperature of the working fluid in the metal heat pipe.

为实现以上目的,本实用新型采取的技术方案是:For realizing above object, the technical scheme that the utility model takes is:

一种内聚光热管式真空集热管,其包括玻璃外管和金属热管,所述金属热管套装于玻璃外管内且二者同轴,金属热管和玻璃外管之间形成真空层,所述玻璃外管具有径向截面为复合抛物线或单抛物线或圆渐开线的聚光面,所述聚光面上设置有反光层,且该聚光面的焦点落在金属热管的外表面。聚光面在玻璃外管的生产过程中就固定成型,因此不需要内插额外的聚光装置。An inner concentrating heat pipe type vacuum heat collection tube, which includes a glass outer tube and a metal heat pipe, the metal heat pipe is set in the glass outer tube and the two are coaxial, a vacuum layer is formed between the metal heat pipe and the glass outer tube, the The glass outer tube has a light-gathering surface with a radial section of a compound parabola, a single parabola, or a circular involute. The light-gathering surface is provided with a reflective layer, and the focus of the light-gathering surface falls on the outer surface of the metal heat pipe. The concentrating surface is fixed and formed during the production of the glass outer tube, so no additional concentrating devices need to be inserted.

所述反光层可以是通过银镜反应沉积于聚光面上的银反光层。The reflective layer may be a silver reflective layer deposited on the light-gathering surface through silver mirror reaction.

所述反光层可以是通过电镀的方法沉积或者通过喷涂于聚光面上的镍反光层、银反光层和铝反光层中的任一种。The reflective layer may be deposited by electroplating or sprayed on the light-gathering surface by any one of nickel reflective layer, silver reflective layer and aluminum reflective layer.

所述反光层为柔性塑料贴膜,该柔性塑料贴膜包括基材层以及镀于所述基材层上的反光结构层。The reflective layer is a flexible plastic film, which includes a substrate layer and a reflective structure layer plated on the substrate layer.

所述反光结构层为银膜层或铝膜层。The reflective structure layer is a silver film layer or an aluminum film layer.

所述基材层为聚对苯二甲酸类塑料层、聚碳酸酯类塑料层、聚乙烯类塑料层和聚丙烯类塑料层中的任一种。The base material layer is any one of polyethylene terephthalate plastic layer, polycarbonate plastic layer, polyethylene plastic layer and polypropylene plastic layer.

所述金属热管的外表面镀有一太阳能选择性吸收涂层。The outer surface of the metal heat pipe is coated with a solar selective absorbing coating.

本实用新型与现有技术相比,具有如下优点:本实用新型采用具有聚光面为复合抛物面、单抛物面或圆渐开面的玻璃外管,并在聚光面上放置柔性反光材料或直接沉积反光层,聚光面在玻璃外管的生产过程中就固定成型,因此不需要内插额外的聚光装置,提高了生产效率,降低了生产成本。同时反光层可将95%以上的太阳光反射到焦点位置,进一步提升了金属热管的吸收效率,提高了金属热管中工质的温度。Compared with the prior art, the utility model has the following advantages: the utility model adopts a glass outer tube with a light-gathering surface as a compound paraboloid, a single paraboloid or a circular involute surface, and places a flexible reflective material on the light-gathering surface or directly The light-reflecting layer is deposited, and the light-gathering surface is fixed and formed during the production process of the glass outer tube, so there is no need to insert an additional light-gathering device, which improves production efficiency and reduces production costs. At the same time, the reflective layer can reflect more than 95% of the sunlight to the focus position, which further improves the absorption efficiency of the metal heat pipe and increases the temperature of the working fluid in the metal heat pipe.

附图说明Description of drawings

图1是本实用新型内聚光热管式真空集热管的结构示意图;Fig. 1 is the structure schematic diagram of the utility model internal concentrating heat pipe type vacuum heat collecting tube;

图2是聚光面为复合抛物面结构的剖视图;Fig. 2 is a cross-sectional view in which the concentrating surface is a compound paraboloid structure;

图3是聚光面为单抛物面结构的剖视图;Fig. 3 is a cross-sectional view in which the concentrating surface is a single paraboloid structure;

图4是聚光面为圆渐开面结构的剖视图;Fig. 4 is a cross-sectional view of a circular involute surface structure;

其中:1、玻璃外管;2、反光层;3、金属热管;4、复合抛物线;5、单抛物线;6、圆渐开线。Among them: 1. Glass outer tube; 2. Reflective layer; 3. Metal heat pipe; 4. Composite parabola; 5. Single parabola; 6. Circular involute.

具体实施方式Detailed ways

下面结合附图和具体实施方式对本实用新型的内容做进一步详细说明。The content of the present utility model will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

实施例1Example 1

请参阅图1和图2,一种内聚光热管式真空集热管,其包括玻璃外管1和金属热管3,金属热管3套装于玻璃外管1内且二者同轴,金属热管3和玻璃外管1之间形成真空层,玻璃外管1的径向截面为圆弧形和复合抛物线4的组合结构,其中由复合抛物线4构成的玻璃外管的内壁称之为聚光面,该聚光面在玻璃外管的生产过程中就固定成型,无需内插聚光结构,提高太阳能利用效率的同时并提高了生产效率,降低了生产成本。聚光面的焦点均落在金属热管3的外表面,而且可以在金属热管3的外表面镀上太阳能选择性吸收涂层,进一步提供太阳能的利用效率。Please refer to Fig. 1 and Fig. 2, a kind of vacuum heat collecting tube of inner concentrating heat pipe type, which includes a glass outer tube 1 and a metal heat pipe 3, the metal heat pipe 3 is set in the glass outer tube 1 and the two are coaxial, and the metal heat pipe 3 A vacuum layer is formed between the glass outer tube 1 and the radial cross section of the glass outer tube 1 is a combined structure of a circular arc and a compound parabola 4, wherein the inner wall of the glass outer tube formed by the compound parabola 4 is called a concentrating surface. The light concentrating surface is fixed and formed during the production process of the glass outer tube, and no light concentrating structure needs to be inserted, thereby improving the utilization efficiency of solar energy, improving the production efficiency and reducing the production cost. The focus of the concentrating surface falls on the outer surface of the metal heat pipe 3, and a solar selective absorption coating can be plated on the outer surface of the metal heat pipe 3 to further improve the utilization efficiency of solar energy.

聚光面上设置有反光层2,其可将95%以上的太阳光反射到金属热管3的外表面,进一步提升了金属热管的吸收效率,提高了金属热管中工质的温度。反光层2可以是利用银镜反应在复合抛物线构成的聚光面上沉积银反射层,也可以通过电镀的方法沉积或者通过喷涂于聚光面上的镍反光层、银反光层和铝反光层,还可以是在玻璃外管1中聚光面的位置插入的柔性反光贴膜,该柔性反光贴膜包括基材层以及镀于所述基材层上的反光结构层,其中:反光结构层可以是银膜层或铝膜层,基材层可以采用聚对苯二甲酸类塑料(PET)、聚碳酸酯类塑料(PC)、聚乙烯类塑料(PE)和聚丙烯类塑料(PP)等材料中的任一种。A light-reflecting layer 2 is arranged on the light-gathering surface, which can reflect more than 95% of sunlight to the outer surface of the metal heat pipe 3, further improving the absorption efficiency of the metal heat pipe and increasing the temperature of the working medium in the metal heat pipe. The reflective layer 2 can be a silver reflective layer deposited on the concentrating surface composed of a compound parabola by using a silver mirror reaction, or it can be deposited by electroplating or sprayed on the concentrating surface with a nickel reflective layer, a silver reflective layer and an aluminum reflective layer , can also be a flexible reflective film inserted at the position of the concentrating surface in the glass outer tube 1, the flexible reflective film includes a base material layer and a reflective structural layer plated on the base material layer, wherein: the reflective structural layer can be Silver film layer or aluminum film layer, substrate layer can be made of polyethylene terephthalate plastic (PET), polycarbonate plastic (PC), polyethylene plastic (PE) and polypropylene plastic (PP) and other materials any of the.

实施例2Example 2

请参阅图1和图3,一种内聚光热管式真空集热管,其包括玻璃外管1和金属热管3,金属热管3套装于玻璃外管1内且二者同轴,金属热管3和玻璃外管1之间形成真空层,玻璃外管1的径向截面为圆弧形和单抛物线5的组合结构,其中由单抛物线5构成的玻璃外管的内壁称之为聚光面,该聚光面在玻璃外管的生产过程中就固定成型,无需内插聚光结构,提高太阳能利用效率的同时并提高了生产效率,降低了生产成本。聚光面的焦点均落在金属热管3的外表面,而且可以在金属热管3的外表面镀上太阳能选择性吸收涂层,进一步提供太阳能的利用效率。Please refer to Fig. 1 and Fig. 3, a kind of vacuum heat collecting tube of inner concentrating heat pipe type, which includes a glass outer tube 1 and a metal heat pipe 3, the metal heat pipe 3 is set in the glass outer tube 1 and the two are coaxial, and the metal heat pipe 3 A vacuum layer is formed between the outer glass tube 1 and the radial section of the outer glass tube 1 is a combined structure of a circular arc and a single parabola 5, wherein the inner wall of the outer glass tube composed of a single parabola 5 is called a light-concentrating surface. The light concentrating surface is fixed and formed during the production process of the glass outer tube, and no light concentrating structure needs to be inserted, thereby improving the utilization efficiency of solar energy, improving the production efficiency and reducing the production cost. The focus of the concentrating surface falls on the outer surface of the metal heat pipe 3, and a solar selective absorption coating can be plated on the outer surface of the metal heat pipe 3 to further improve the utilization efficiency of solar energy.

聚光面上设置有反光层2,其可将95%以上的太阳光反射到金属热管3的外表面,进一步提升了金属热管的吸收效率,提高了金属热管中工质的温度。反光层2可以是利用银镜反应在单抛物线构成的聚光面上沉积银反射层,也可以通过电镀的方法沉积或者通过喷涂于聚光面上的镍反光层、银反光层和铝反光层,还可以是在玻璃外管1中聚光面的位置插入的柔性反光贴膜,该柔性反光贴膜包括基材层以及镀于所述基材层上的反光结构层,其中:反光结构层可以是银膜层或铝膜层,基材层可以采用聚对苯二甲酸类塑料(PET)、聚碳酸酯类塑料(PC)、聚乙烯类塑料(PE)和聚丙烯类塑料(PP)等材料中的任一种。A light-reflecting layer 2 is arranged on the light-gathering surface, which can reflect more than 95% of sunlight to the outer surface of the metal heat pipe 3, further improving the absorption efficiency of the metal heat pipe and increasing the temperature of the working medium in the metal heat pipe. The reflective layer 2 can be a silver reflective layer deposited on the concentrating surface composed of a single parabola by using the silver mirror reaction, or it can be deposited by electroplating or sprayed on the concentrating surface by nickel reflective layer, silver reflective layer and aluminum reflective layer , can also be a flexible reflective film inserted at the position of the concentrating surface in the glass outer tube 1, the flexible reflective film includes a base material layer and a reflective structural layer plated on the base material layer, wherein: the reflective structural layer can be Silver film layer or aluminum film layer, substrate layer can be made of polyethylene terephthalate plastic (PET), polycarbonate plastic (PC), polyethylene plastic (PE) and polypropylene plastic (PP) and other materials any of the.

实施例3Example 3

请参阅图1和图4,一种内聚光热管式真空集热管,其包括玻璃外管1和金属热管3,金属热管3套装于玻璃外管1内且二者同轴,金属热管3和玻璃外管1之间形成真空层,玻璃外管1的径向截面为圆弧形和圆渐开线6的组合结构,其中由圆渐开线6组成构成的玻璃外管的内壁称之为聚光面,该聚光面在玻璃外管的生产过程中就固定成型,无需内插聚光结构,提高太阳能利用效率的同时并提高了生产效率,降低了生产成本。聚光面的焦点均落在金属热管3的外表面,而且可以在金属热管3的外表面镀上太阳能选择性吸收涂层,进一步提供太阳能的利用效率。Please refer to Fig. 1 and Fig. 4, a kind of vacuum heat collecting tube of inner concentrating heat pipe type, which includes a glass outer tube 1 and a metal heat pipe 3, the metal heat pipe 3 is set in the glass outer tube 1 and the two are coaxial, and the metal heat pipe 3 A vacuum layer is formed between the glass outer tube 1 and the radial section of the glass outer tube 1 is a combination structure of circular arc and circular involute 6, wherein the inner wall of the glass outer tube composed of circular involute 6 is called It is a light-gathering surface, which is fixed and formed during the production process of the glass outer tube, without the need to insert a light-gathering structure, which improves the efficiency of solar energy utilization, improves production efficiency, and reduces production costs. The focus of the concentrating surface falls on the outer surface of the metal heat pipe 3, and a solar selective absorption coating can be plated on the outer surface of the metal heat pipe 3 to further improve the utilization efficiency of solar energy.

聚光面上设置有反光层2,其可将95%以上的太阳光反射到金属热管3的外表面,进一步提升了金属热管的吸收效率,提高了金属热管中工质的温度。反光层2可以是利用银镜反应在圆渐开线6构成的聚光面上沉积银反射层,也可以通过电镀的方法沉积或者通过喷涂于聚光面上的镍反光层、银反光层和铝反光层,还可以是在玻璃外管1中聚光面的位置插入的柔性反光贴膜,该柔性反光贴膜包括基材层以及镀于所述基材层上的反光结构层,其中:反光结构层可以是银膜层或铝膜层,基材层可以采用聚对苯二甲酸类塑料(PET)、聚碳酸酯类塑料(PC)、聚乙烯类塑料(PE)和聚丙烯类塑料(PP)等材料中的任一种。A light-reflecting layer 2 is arranged on the light-gathering surface, which can reflect more than 95% of sunlight to the outer surface of the metal heat pipe 3, further improving the absorption efficiency of the metal heat pipe and increasing the temperature of the working medium in the metal heat pipe. Reflective layer 2 can utilize silver mirror reaction to deposit silver reflective layer on the light-gathering surface that circular involute 6 forms, also can be deposited by the method for electroplating or by the nickel reflective layer that sprays on the light-condensing surface, silver reflective layer and The aluminum reflective layer can also be a flexible reflective film inserted at the position of the concentrating surface in the glass outer tube 1. The flexible reflective film includes a substrate layer and a reflective structure layer coated on the substrate layer, wherein: the reflective structure The layer can be a silver film layer or an aluminum film layer, and the substrate layer can be made of polyethylene terephthalate plastic (PET), polycarbonate plastic (PC), polyethylene plastic (PE) and polypropylene plastic (PP) ) and other materials.

上列详细说明是针对本实用新型可行实施例的具体说明,该实施例并非用以限制本实用新型的保护范围,凡未脱离本实用新型所为的等效实施或变更,均应包含于本案的保护范围中。The above detailed description is a specific description of the feasible embodiment of the utility model. This embodiment is not used to limit the scope of protection of the utility model. Any equivalent implementation or change that does not deviate from the utility model should be included in this case within the scope of protection.

Claims (7)

1. condensing thermal tube type vacuum heat-collecting tube in a kind, it comprises glass outer tube (1) and metal heat pipe (3), described metal heat pipe (3) is set in the glass outer tube (1) and the two is coaxial, form vacuum layer between metal heat pipe (3) and the glass outer tube (1), it is characterized in that, described glass outer tube (1) has the caustic surface that radial section is compound parabolic (4) or single parabola (5) or circle involute (6), be provided with reflector layer (2) on the described caustic surface, and the focus of this caustic surface drops on the outer surface of metal heat pipe (3).
2. interior condensing thermal tube type vacuum heat-collecting tube according to claim 1 is characterized in that, described reflector layer (2) is argentum reflecting layer.
3. interior condensing thermal tube type vacuum heat-collecting tube according to claim 1 is characterized in that, described reflector layer (2) is any in nickel reflector layer, silver-colored reflector layer and the aluminium reflector layer.
4. interior condensing thermal tube type vacuum heat-collecting tube according to claim 1 is characterized in that, described reflector layer (2) is the flexiplast pad pasting, and this flexiplast pad pasting comprises substrate layer and is plated on reflective structure layer on the described substrate layer.
5. interior condensing thermal tube type vacuum heat-collecting tube according to claim 4 is characterized in that, described reflective structure layer is silver film or aluminum membranous layer.
6. according to claim 4 or 5 described interior condensing thermal tube type vacuum heat-collecting tubes, it is characterized in that described substrate layer is any in poly terephthalic acid class plastic layer, polycarbonate-based plastic layer, polyethylene layer and the PP type plastic layer.
7. interior condensing thermal tube type vacuum heat-collecting tube according to claim 1 is characterized in that, the outer surface of described metal heat pipe (3) is coated with a solar selectively absorbing coating.
CN2013202427017U 2013-05-07 2013-05-07 An inner concentrating light heat pipe type vacuum heat collecting tube Expired - Fee Related CN203249409U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106839473A (en) * 2017-04-01 2017-06-13 东南大学 A vacuum heat collecting tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106839473A (en) * 2017-04-01 2017-06-13 东南大学 A vacuum heat collecting tube

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