CN100543438C - bipolar plate flow field fluid visualization device and method - Google Patents
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Abstract
Description
技术领域 technical field
本发明涉及一种检测流场流体运动规律的装置，尤其涉及一种双极板流场流体可视化装置和方法。The invention relates to a device for detecting the movement law of fluid in a flow field, in particular to a fluid visualization device and method for a bipolar plate flow field.
背景技术 Background technique
燃料电池双极板分为阴极板、阳极板，冷却腔流场板。阴极板、阳极板上均有符合燃料电池输送、排放物质要求的通道，也叫流场，流场是由流场沟和流场脊组成，流场形状可以按照流体运动规律设计，设计的流场对燃料电池性能有重要影响。The fuel cell bipolar plate is divided into cathode plate, anode plate, cooling chamber flow field plate. Both the cathode plate and the anode plate have channels that meet the requirements of fuel cell transportation and discharge, also called flow field. The flow field is composed of flow field grooves and flow field ridges. The shape of the flow field can be designed according to the law of fluid motion. field has a significant impact on fuel cell performance.
流体的可视化在文献F.Barreras*，A.Lozano，L.Vali~no，C.Mar′in，A.Pascau：Flow distribution in a bipolar plate of a proton exchange membrane fuel cell：experiments and numerical simulation studies，Journal of Power Sources 144(2005)54-66中有详细描述，该文献中采用的方法，流体是确定黏度的溶剂与可溶荧光染色剂混合物，确定黏度是指液体在管道中确定的流速时具有与氢气运动黏度相近的液体，文献中溶剂流体是甘油与水按一定比例配制的，可溶性荧光染色剂可以溶于溶剂流体，采用注射的方法引入溶剂流体通道，然后用荧光示踪激光摄像机对流体运动状态进行记录。也存在其它相似的方法进行观察。这些方法共同的缺点是对透明装置有很高的要求，因为应用了有机溶剂，所以不能使用橡塑材料，特别是对双极板密封用材料有溶胀作用，另外，荧光染色剂的溶解混合均匀性、速度无法把握和表征，另外荧光示踪噪声大，影响观察的准确性。The visualization of the fluid is in the literature F.Barreras*, A.Lozano, L.Vali~no, C.Mar′in, A.Pascau: Flow distribution in a bipolar plate of a proton exchange membrane fuel cell: experiments and numerical simulation studies, It is described in detail in Journal of Power Sources 144(2005) 54-66. The method used in this document is that the fluid is a mixture of a solvent and a soluble fluorescent dye to determine the viscosity. The determined viscosity means that the liquid has a certain flow rate in the pipeline. A liquid with a kinematic viscosity similar to that of hydrogen. In the literature, the solvent fluid is prepared by glycerin and water in a certain proportion. The soluble fluorescent dye can be dissolved in the solvent fluid. Record exercise status. There are other similar methods of observation as well. The common disadvantage of these methods is that there are high requirements for transparent devices. Because of the application of organic solvents, rubber and plastic materials cannot be used, especially for bipolar plate sealing materials, which have a swelling effect. In addition, the dissolution and mixing of fluorescent dyes are uniform. The performance and speed cannot be grasped and characterized. In addition, the fluorescent tracer has a lot of noise, which affects the accuracy of observation.
发明内容 Contents of the invention
本发明的目的在于针对现有技术的不足，研制一种方便观察、记录流体在流场内运动的状态的双极板流场流体可视化装置和方法。本发明的技术实现手段如下：The purpose of the present invention is to develop a bipolar plate flow field fluid visualization device and method that is convenient for observing and recording the state of fluid movement in the flow field, aiming at the deficiencies of the prior art. Technical implementation means of the present invention are as follows:
一种双极板流场流体可视化装置，其特征在于包括底板、气体供应装置、增湿罐、红外摄像机和盖板；在底板上，双极板的进出口位置设有流体通道；在所述气体供应装置通入底板的管道上装有各种流体测量仪表，并在底板的出口端也设有测量仪表，所述盖板上镶有金属丝，增湿罐上设有加热装置；使用时将双极板夹在盖板和底板中间，通过紧固螺栓将其紧固，气体供应装置通过调节装置调节后，将气体通入增湿罐中进行加热，后注入双极板上的流场内，用红外摄像机进行记录。A bipolar plate flow field fluid visualization device is characterized in that it includes a base plate, a gas supply device, a humidification tank, an infrared camera and a cover plate; on the base plate, a fluid channel is provided at the inlet and outlet positions of the bipolar plate; Various fluid measuring instruments are installed on the pipeline leading to the bottom plate of the gas supply device, and measuring instruments are also installed at the outlet end of the bottom plate. The cover plate is inlaid with metal wires, and the humidification tank is equipped with a heating device; The bipolar plate is sandwiched between the cover plate and the bottom plate, and it is fastened by fastening bolts. After the gas supply device is adjusted by the regulating device, the gas is passed into the humidification tank for heating, and then injected into the flow field on the bipolar plate , recorded with an infrared camera.
盖板上镶入槽的直径稍大于金属丝直径，金属丝镶入时一面漏出，一面用环氧树脂封装固定，漏出端对着流场面，金属丝沿流场沟槽结构分布，分布间距为等距离。The diameter of the insertion groove on the cover plate is slightly larger than the diameter of the metal wire. When the metal wire is inserted, one side leaks out, and the other side is sealed and fixed with epoxy resin. The leaking end faces the flow field surface. The metal wires are distributed along the flow field groove structure with a distribution distance of equidistant.
所述的盖板为玻璃布层压板，金属丝为铜丝。The cover plate is a glass cloth laminated plate, and the metal wire is copper wire.
所述各种流体测量仪表为温度仪表、流量仪表和压力仪表；调节装置为减压阀、稳压阀和调节阀。The various fluid measuring instruments are temperature instruments, flow meters and pressure instruments; the regulating devices are pressure reducing valves, pressure stabilizing valves and regulating valves.
气体供应装置管道具有良好保温。Gas supply pipes are well insulated.
所述的双极板为单节双极板或叠加双极板。The bipolar plates are single-section bipolar plates or stacked bipolar plates.
一种使用双极板流场流体可视化装置的方法，其特征在于包括如下步骤：A method of using a bipolar plate flow field fluid visualization device, characterized in that it comprises the following steps:
a、将双极板夹在盖板和底板中间，用紧固螺栓将其紧固；a. Clamp the bipolar plate between the cover plate and the bottom plate, and fasten it with fastening bolts;
b、加热增湿罐温度，增湿罐温度达到沸腾；b. Heat the temperature of the humidification tank, and the temperature of the humidification tank reaches boiling;
c、打开红外摄像机，对准双极板流场测试位置；c. Turn on the infrared camera and aim at the test position of the bipolar plate flow field;
d、打开气体供应装置阀门，气体通过增湿罐被加热，热气流进入双极板流场；d. Open the valve of the gas supply device, the gas is heated through the humidification tank, and the hot air flow enters the flow field of the bipolar plate;
e、红外摄像机记录盖板上各点金属丝温度分布。e. The infrared camera records the temperature distribution of the metal wire at each point on the cover.
还包括按照电堆放置的常见方式，改变该装置的放置方式进行分别测试观察的步骤。It also includes the step of changing the placement mode of the device according to the common way of stack placement to conduct separate test and observation.
还包括改变气体的压力、流量，后分别进行测试观察的步骤。本发明主要解决了测试方法中流体选用以及观察方法问题，所采用的流体和方法简单、实用，能更加准确、更加快速地观察到所需的结果，适于双极板设计验证。由于其结构简单，不仅便于生产，而且成本非常低廉适于广泛推广。It also includes the steps of changing the pressure and flow of the gas, and then performing tests and observations respectively. The invention mainly solves the problems of fluid selection and observation method in the testing method, the adopted fluid and method are simple and practical, can observe required results more accurately and quickly, and is suitable for bipolar plate design verification. Because of its simple structure, it is not only convenient for production, but also very low in cost and suitable for wide popularization.
附图说明 Description of drawings
图1为本发明的装置结构示意图。Fig. 1 is a schematic diagram of the device structure of the present invention.
图中：1、盖板，2、底板，3、双极板，4、流场5、紧固螺栓，6、红外摄像机，7、出口，8、气体供应装置，9、增湿罐，10、铜丝，11、调节装置。In the figure: 1. Cover plate, 2. Bottom plate, 3. Bipolar plate, 4. Flow field, 5. Fastening bolts, 6. Infrared camera, 7. Outlet, 8. Gas supply device, 9. Humidification tank, 10 , copper wire, 11, adjusting device.
具体实施方式 Detailed ways
如图1所示双极板流场流体可视化装置，根据温度作为测试对象，空气热气流为测试气流，其装置包括底板2、气体供应装置8、增湿罐9、红外摄像机6和盖板1；在底板2上，双极板3的进出口位置设有流体通道；在气体供应装置8通入底板2的管道上装有温度仪表、流量仪表、压力仪表，并在底板2的出口7端也设有温度仪表，盖板1为玻璃布层压板，上面镶有金属丝10，金属丝10为铜丝，调节装置11为减压阀、稳压阀和调节阀，增湿罐9上设有加热装置。其中双极板有效面积为300cm2，双极板流场通道体积为7ml，流场4长度为370mm，控制空气压力为0.03MPa，流量为0.4m3/h，相应的盖板1上按照双极板流场图样镶入细铜丝，铜丝直径为0.5mm，镶入孔直径为0.8mm，铜丝上端部用环氧树脂塑封，铜丝漏头，与流场连通的部位不封，可以稍露出深入流场，铜丝间距为5mm，每条流场上有80根铜丝。进行测量时将双极板3夹在盖板1和底板2中间，通过紧固螺栓5将其紧固；其中气体压力和流量控制是通过空白试验的方法实现的，将双极板装在装置内，气体管道不通过增湿罐，调节稳压阀和调节阀，将压力和流量控制到预定位置，稳压阀不动，关闭调节阀；加热增湿罐温度，等增湿罐温度达到沸腾后，打开红外摄像机，在打开空气调节阀，空气经过增湿罐加热并增湿，热气从底板2上的进口进入双极板3，增湿罐温度为水的沸腾温度，出口端可测量温度，在通气之前打开红外摄像机，连续记录通气时流场上各点铜丝温度分布状况，并把流场上温度变化范围和温度高低分布迅速记录，记录数据可以进行分析得出流场分配和流体运动特性。As shown in Figure 1, the bipolar plate flow field fluid visualization device is based on the temperature as the test object, and the hot air flow is the test air flow. The device includes a bottom plate 2, a gas supply device 8, a humidification tank 9, an infrared camera 6 and a cover plate 1 ; On the bottom plate 2, the inlet and outlet positions of the bipolar plate 3 are provided with a fluid passage; the pipeline of the gas supply device 8 passing into the bottom plate 2 is equipped with a temperature instrument, a flow meter, and a pressure instrument, and at the outlet 7 of the bottom plate 2. There is a temperature instrument, the cover plate 1 is a glass cloth laminated plate, and a metal wire 10 is inlaid on it, and the metal wire 10 is a copper wire. The regulating device 11 is a pressure reducing valve, a pressure stabilizing valve and a regulating valve. heating equipment. The effective area of the bipolar plate is 300cm 2 , the flow field channel volume of the bipolar plate is 7ml, the length of the flow field 4 is 370mm, the control air pressure is 0.03MPa, and the flow rate is 0.4m 3 /h. The plate flow field pattern is embedded with fine copper wire, the diameter of the copper wire is 0.5mm, and the diameter of the insertion hole is 0.8mm. The upper end of the copper wire is plastic-sealed with epoxy resin, and the copper wire leaks. The part connected to the flow field is not sealed. The deep flow field can be slightly exposed, the distance between the copper wires is 5mm, and there are 80 copper wires on each flow field. During the measurement, the bipolar plate 3 is clamped between the cover plate 1 and the bottom plate 2, and it is fastened by fastening bolts 5; the gas pressure and flow control are realized by the method of blank test, and the bipolar plate is installed in the device Inside, the gas pipeline does not pass through the humidification tank, adjust the pressure stabilizing valve and regulating valve, control the pressure and flow to the predetermined position, keep the pressure stabilizing valve fixed, close the regulating valve; heat the temperature of the humidifying tank, and wait for the temperature of the humidifying tank to reach boiling Finally, turn on the infrared camera, open the air regulating valve, the air is heated and humidified through the humidification tank, the hot air enters the bipolar plate 3 from the inlet on the bottom plate 2, the temperature of the humidification tank is the boiling temperature of water, and the temperature can be measured at the outlet , turn on the infrared camera before ventilation, continuously record the temperature distribution of the copper wire at each point on the flow field during ventilation, and quickly record the temperature range and temperature distribution on the flow field. The recorded data can be analyzed to obtain the flow field distribution and fluid sporty characteristics.
后根据电池堆放置的常见方式，改变该装置的放置方式按照前面的步骤进行分别测试观察；或根据气体的压力、流量，后分别进行测试观察，记录流体动态分布状况。Finally, according to the common way of battery stack placement, change the placement of the device and perform separate test and observation according to the previous steps; or according to the pressure and flow rate of the gas, test and observe respectively, and record the dynamic distribution of the fluid.
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，都应涵盖在本发明的保护范围之内。The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.
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| CN106771338A (en) * | 2016-12-30 | 2017-05-31 | 北京天恒长鹰科技股份有限公司 | A kind of wind direction of near space and the acquisition methods and device of wind speed size |
| CN113451605B (en) * | 2021-06-07 | 2022-12-13 | 天津大学 | Fuel cell offline visual split mounting type device |
| CN113790868B (en) * | 2021-09-29 | 2023-04-28 | 嘉庚创新实验室 | Flow field plate detection device and method |
| CN114813033A (en) * | 2022-03-30 | 2022-07-29 | 安徽明天氢能科技股份有限公司 | Visualization device for evaluating drainage capacity of bipolar plate |
| CN119354479B (en) * | 2024-09-10 | 2025-05-27 | 清华大学 | Flow field visualization observation method and device based on infrared spectrum absorption characteristics |
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