CN102647122B - The temperature automatically controlled combined power generation device of photovoltaic-temperature difference - Google Patents
The temperature automatically controlled combined power generation device of photovoltaic-temperature difference Download PDFInfo
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Abstract
本发明涉及一种太阳能光伏-温差自动控温联合发电装置，以太阳能光伏发电系统为主能源，半导体温差发电作为电池温度反馈和控制的重要辅助手段。半导体温差发电模块利用太阳能电池背面与环境温度之间的温差发电，并输送到控制系统中作为自动反馈来调节散热器中风扇。控制器能够自动判断电池板冷却介质的温度值是否过高，并由此确定是否启动烟囱冷却器中附加强力散热风扇。而烟囱式散热器则是利用了烟囱效应达到降低冷却介质温度的目的，其冷却效果与温度成反比，起到自动反馈调节的作用。装置将半导体温差发电与太阳能光伏发电技术有效的结合起来，充分利用太阳能电池发电过程中的低品位热，将之转换为散热的能源，对提高太阳能光伏电池的效率起到很大作用。
The invention relates to a solar photovoltaic-temperature difference automatic temperature control combined power generation device, which uses a solar photovoltaic power generation system as the main energy source, and semiconductor thermoelectric power generation as an important auxiliary means for battery temperature feedback and control. The semiconductor thermoelectric power generation module uses the temperature difference between the back of the solar cell and the ambient temperature to generate electricity, and sends it to the control system as automatic feedback to adjust the fan in the radiator. The controller can automatically judge whether the temperature value of the battery board cooling medium is too high, and thus determine whether to start the additional powerful cooling fan in the chimney cooler. The chimney radiator uses the chimney effect to reduce the temperature of the cooling medium, and its cooling effect is inversely proportional to the temperature, which plays the role of automatic feedback adjustment. The device effectively combines semiconductor thermoelectric power generation with solar photovoltaic power generation technology, fully utilizes the low-grade heat in the process of solar cell power generation, and converts it into heat dissipation energy, which plays a great role in improving the efficiency of solar photovoltaic cells.
Description
技术领域 technical field
本发明涉及一种太阳能光伏装置，特别涉及一种太阳能光伏-温差自动控温联合发电装置。 The invention relates to a solar photovoltaic device, in particular to a solar photovoltaic-temperature difference automatic temperature control combined power generation device.
背景技术 Background technique
随着石油、煤、天然气等不可再生能源的消耗及资源的衰竭，人们希望通过对太阳能等新能源的开发利用来解决由于不可再生能源资源枯竭所导致的日益严重的能源危机。太阳能光伏发电是一种可以直接将太阳能转化为电能的技术，在其发电过程中不会对周围环境产生较大的不利影响，因此受到人们越来越多的青睐。目前应用于商业化的光伏电池主要是硅系太阳能光伏电池，其输出特性随着温度的升高而发生显著的变化：开路电压变小，而短路电流略微增大，导致转换效率的降低。通常在自然对流的情况下，电池的温度较环境温度高30℃以上，而在夏季高温时会高达50℃以上，此时电池的使用效率和寿命都会受到直接的影响，因此需要采用有效地降温措施使之能够正常工作。 With the consumption of non-renewable energy sources such as oil, coal, and natural gas and the depletion of resources, people hope to solve the increasingly serious energy crisis caused by the depletion of non-renewable energy resources through the development and utilization of new energy sources such as solar energy. Solar photovoltaic power generation is a technology that can directly convert solar energy into electrical energy, and it will not have a large adverse impact on the surrounding environment during its power generation process, so it is favored by more and more people. The photovoltaic cells currently used in commercialization are mainly silicon-based solar photovoltaic cells, and their output characteristics change significantly with the increase of temperature: the open circuit voltage decreases, while the short circuit current slightly increases, resulting in a decrease in conversion efficiency. Usually, in the case of natural convection, the temperature of the battery is higher than the ambient temperature by more than 30°C, and it can be as high as 50°C or more in summer. At this time, the efficiency and life of the battery will be directly affected. measures to make it work properly.
半导体温差发电技术是在燃料电池在实际应用中遇到困难后得到人们关注的。半导体工艺及材料技术的进步使得较高转换效率的热电材料成为可能，它具有无噪音、无磨损、无介质泄露、体积小、重量轻、移动方便、使用寿命长等优点，其后期维护成本几乎是零。以上因素使得民用领域的温差电技术成为热门的研究方向。 Semiconductor thermoelectric power generation technology has attracted people's attention after fuel cells encountered difficulties in practical applications. Advances in semiconductor technology and material technology have made it possible to use thermoelectric materials with high conversion efficiency. It has the advantages of no noise, no wear, no medium leakage, small size, light weight, convenient movement, and long service life. The maintenance cost in the later period is almost is zero. The above factors make the thermoelectric technology in the civil field become a hot research direction.
实验研究表明，太阳能电池效率随着温度的升高而降低，且降幅较大；半导体温差模块随着热面温度的升高，其效率和功率都有所增加；烟囱效应可以将温度直接转化为动力，且随着出口段温度和高度的升高，这种效应更加的明显。如果能够有效地将这三者结合，利用半导体温差模块和烟囱式的散热器在不增加能耗的同时给光伏电池降温，增加输出，这样就在绿色、节能、环保的同时提高了光伏系统的发电效率。 Experimental research shows that the efficiency of solar cells decreases with the increase of temperature, and the drop rate is relatively large; the efficiency and power of the semiconductor thermoelectric module increase with the increase of the temperature of the hot surface; the chimney effect can directly convert the temperature into Power, and this effect is more obvious as the temperature and height of the outlet section increase. If the three can be effectively combined, the semiconductor temperature difference module and the chimney radiator can be used to cool down the photovoltaic cell and increase the output without increasing energy consumption, thus improving the efficiency of the photovoltaic system while being green, energy-saving and environmentally friendly. power generation efficiency.
发明内容 Contents of the invention
本发明是针对光伏系统的发电散热和效率的问题，提出了一种太阳能光伏-温差自动控温联合发电装置，采用蓄电池存储能量，采用烟囱式冷却器及半导体温差发电模块使整个系统具有自动调节温度、运行平稳可靠，提高了装置的工作效率。 The present invention is aimed at the problems of power generation and heat dissipation and efficiency of photovoltaic systems, and proposes a solar photovoltaic-temperature difference automatic temperature control combined power generation device, which uses batteries to store energy, and uses chimney coolers and semiconductor temperature difference power generation modules to make the entire system have automatic regulation. The temperature and operation are stable and reliable, which improves the working efficiency of the device.
本发明的技术方案为：一种太阳能光伏-温差自动控温联合发电装置，包括太阳能光伏发电系统、温差发电系统、冷却系统、电源控制系统和温度控制系统，太阳能光伏发电系统包含太阳能电池板和电源控制器，温差发电系统给冷却系统供电，冷却系统包含电池板背面通道、管道、蓄水箱、小功率水泵和烟囱式散热器；温差发电系统包含温差模块和U型铜质通道，U型铜质通道安装在烟囱式散热器中；烟囱式散热器包含由半导体温差模块驱动控制的强排风风扇、散热排、辅助风扇及位于中部的温差模块U型铜质通道，温差模块位于电池板背面，温差模块输出通过温度控制系统升压和稳压后驱动烟囱式散热器内强排风风扇，温度控制系统采集太阳能电池板温度输出控制信号到电源控制系统，电源控制系统输出控制辅助风扇。 The technical solution of the present invention is: a solar photovoltaic-temperature difference automatic temperature control combined power generation device, including a solar photovoltaic power generation system, a thermoelectric power generation system, a cooling system, a power control system and a temperature control system. The solar photovoltaic power generation system includes solar panels and The power controller, the thermoelectric power generation system supplies power to the cooling system, the cooling system includes the back channel of the battery board, the pipeline, the water storage tank, the small power water pump and the chimney radiator; the thermoelectric power generation system includes the thermoelectric module and the U-shaped copper channel, the U-shaped The copper channel is installed in the chimney radiator; the chimney radiator includes a strong exhaust fan driven and controlled by a semiconductor temperature difference module, a radiator, an auxiliary fan, and a U-shaped copper channel of the temperature difference module in the middle. The temperature difference module is located on the battery board On the back, the output of the temperature difference module is boosted and stabilized by the temperature control system to drive the strong exhaust fan in the chimney radiator. The temperature control system collects the solar panel temperature output control signal to the power control system, and the power control system outputs to control the auxiliary fan.
所述温差模块包括半导体温差发电片和水冷头，U型铜质通道和半导体温差发电片通过高导热和高强度的粘合剂粘结在太阳能电池组件背面。 The temperature difference module includes a semiconductor thermoelectric generator sheet and a water cooling head, and the U-shaped copper channel and the semiconductor thermoelectric generator sheet are bonded to the back of the solar cell module by an adhesive with high thermal conductivity and high strength.
所述烟囱式散热器中散热排置于烟囱顶部，强排风风扇和辅助风扇分别布置在散热排的上下部，温差模块U型铜质通道置于烟囱中间位置。 In the chimney radiator, the radiator is placed on the top of the chimney, the strong exhaust fan and the auxiliary fan are respectively arranged at the upper and lower parts of the radiator, and the U-shaped copper channel of the temperature difference module is placed in the middle of the chimney.
所述电源控制系统包含升、降压模块、稳压模块、蓄电池的充放电保护电路及输出电路。 The power supply control system includes step-up and step-down modules, a voltage stabilizing module, a battery charge and discharge protection circuit and an output circuit.
所述电池板的冷却除垢水经过散热排将热量散发到烟囱式散热器。 The cooling and descaling water of the battery board dissipates heat to the chimney radiator through the radiator.
本发明的有益效果在于：本发明一种太阳能光伏-温差自动控温联合发电装置，提高系统的光电转化效率，同时系统也降低了对环境中排放的二次热污染。具有高效、节能、绿色、环保的效果。 The beneficial effect of the present invention is that: a solar photovoltaic-temperature difference automatic temperature control combined power generation device of the present invention improves the photoelectric conversion efficiency of the system, and at the same time, the system also reduces the secondary heat pollution emitted in the environment. It has the effects of high efficiency, energy saving, green and environmental protection.
附图说明 Description of drawings
图1为本发明太阳能光伏-温差自动控温联合发电装置原理图； Fig. 1 is the schematic diagram of the solar photovoltaic-temperature difference automatic temperature control combined power generation device of the present invention;
图2为本发明太阳能光伏-温差自动控温联合发电装置结构框图； Fig. 2 is a structural block diagram of the solar photovoltaic-temperature difference automatic temperature control combined power generation device of the present invention;
图3为本发明太阳能光伏-温差自动控温联合发电装置中背面温差模块剖面图； Fig. 3 is a cross-sectional view of the back temperature difference module in the solar photovoltaic-temperature difference automatic temperature control combined power generation device of the present invention;
图4为本发明太阳能光伏-温差自动控温联合发电装置中太阳能电池板背面改造布置图； Fig. 4 is a rearrangement layout diagram of the solar cell panel in the solar photovoltaic-temperature difference automatic temperature control combined power generation device of the present invention;
图5为本发明太阳能光伏-温差自动控温联合发电装置中烟囱式冷却器结构图。 Fig. 5 is a structural diagram of the chimney cooler in the solar photovoltaic-temperature difference automatic temperature control combined power generation device of the present invention.
具体实施方式 Detailed ways
系统太阳能光伏-温差自反馈式联合发电装置如图1、2所示原理和结构框图，包括太阳能光伏发电系统、温差发电系统、冷却系统、电源控制系统和温度控制系统。以光伏发电系统发电过程中产生的热作为能源，冷却水通过背面通道时带走热量到烟囱式散热器中将之散发。温差模块2均匀置于光伏电池背面和水冷头之间合适位置，部分热能转化为电能。取出其中2组温差模块2所发电能通过温度控制器20的升压、稳流后供给强排风风扇11，用于加强散热。同时通过温度控制器20中的温差测量模块测量电池板与环境的温差，并判断是否需从电源控制器中分流小部分能量供给辅助风扇10来加强烟囱式散热排9的散热效率。温度控制器20同时可以通过测量对比电池板1、电池板冷却水、温差模块2的温度，自动判断是否出现故障，并通过亮警示灯提醒。图2中所示为太阳能电池板1、温差模块2(主要由半导体温差发电片24和水冷头25组成)2、冷却水进水端3、冷却水出水端4、温度测量5、蓄水箱6、小功率循环泵7、烟囱式冷却器8、散热排9、辅助风扇10、强排风风扇11、温差模块2冷却除垢水进出口12、温差模块2散热薄铜管13、光伏电池输出14、温差模块2输出15、电源控制器16、高容量蓄电池17、蓄电池充放电保护电路18、温度控制器输入端19、温度控制器20、辅助风扇10控制输入线21、强排风风扇11控制输出线22、光伏-温差装置的冷却系统23。 The principle and structural block diagram of the solar photovoltaic-temperature difference self-feedback combined power generation device of the system are shown in Figures 1 and 2, including a solar photovoltaic power generation system, a thermoelectric power generation system, a cooling system, a power control system and a temperature control system. The heat generated during the power generation process of the photovoltaic power generation system is used as energy, and the cooling water takes away the heat when it passes through the back channel and dissipates it in the chimney radiator. The temperature difference module 2 is evenly placed in a suitable position between the back of the photovoltaic cell and the water cooling head, and part of the heat energy is converted into electrical energy. The power generated by the two sets of temperature difference modules 2 is taken out and supplied to the strong exhaust fan 11 after being boosted and stabilized by the temperature controller 20 to enhance heat dissipation. At the same time, the temperature difference between the battery board and the environment is measured by the temperature difference measurement module in the temperature controller 20, and it is judged whether a small part of energy needs to be shunted from the power controller to supply the auxiliary fan 10 to enhance the heat dissipation efficiency of the chimney radiator 9. At the same time, the temperature controller 20 can automatically judge whether there is a fault by measuring the temperature of the comparison battery board 1, the cooling water of the battery board, and the temperature difference module 2, and remind by turning on the warning light. Shown in Fig. 2 are solar panel 1, temperature difference module 2 (mainly composed of semiconductor thermoelectric power generation sheet 24 and water cooling head 25) 2, cooling water inlet 3, cooling water outlet 4, temperature measurement 5, water storage tank 6. Small power circulation pump 7, chimney cooler 8, radiator 9, auxiliary fan 10, strong exhaust fan 11, temperature difference module 2 cooling descaling water inlet and outlet 12, temperature difference module 2 heat dissipation thin copper tube 13, photovoltaic battery Output 14, temperature difference module 2 output 15, power controller 16, high-capacity battery 17, battery charge and discharge protection circuit 18, temperature controller input 19, temperature controller 20, auxiliary fan 10 control input line 21, strong exhaust fan 11 Control output line 22, cooling system 23 of photovoltaic-thermo-difference device.
光伏-温差装置的冷却系统23包含光伏电池板1、烟囱式散热器8、小功率循环泵7、蓄水箱6以及温度控制器20。系统中泵和风扇的工作电压皆为12V，利用电池板和环境的温度、泵的功率、流速、散热排散热面积、风扇2的额定功率计算适合辅助风扇10的临界启动温度。超过该温度后，启动辅助风扇10使得电池板温度降低，效率提高，发电量增加，且能够保证所增加功耗小于系统从临界温度降低到稳态温度时增加的发电量。 The cooling system 23 of the photovoltaic-temperature difference device includes a photovoltaic panel 1 , a chimney radiator 8 , a low-power circulation pump 7 , a water storage tank 6 and a temperature controller 20 . The working voltage of the pump and the fan in the system is both 12V, and the critical starting temperature suitable for the auxiliary fan 10 is calculated by using the temperature of the battery board and the environment, the power of the pump, the flow rate, the heat dissipation area of the radiator, and the rated power of the fan 2. After the temperature is exceeded, start the auxiliary fan 10 to lower the temperature of the battery board, improve the efficiency, and increase the power generation, and can ensure that the increased power consumption is less than the increased power generation when the system drops from the critical temperature to the steady-state temperature.
如图3所示背面温差模块剖面图，半导体温差发电片24利用赛贝克效应，将电池板1与水冷头25之间的温差直接转化为电能。其中部分半导体温差发电通过电源控制器的升压、稳压后供给负载或存储到高容量蓄电池17中。在存储到高容量蓄电池17时需要接一肖特基二极管在蓄电池充电保护电路中。 As shown in the sectional view of the temperature difference module on the back of FIG. 3 , the semiconductor thermoelectric power generation chip 24 utilizes the Seebeck effect to directly convert the temperature difference between the battery board 1 and the water cooling head 25 into electrical energy. Part of the thermoelectric power generated by the semiconductor is supplied to the load after being boosted and stabilized by the power controller or stored in the high-capacity storage battery 17 . Need to connect a Schottky diode in the storage battery charging protection circuit when being stored in high-capacity storage battery 17.
太阳能电池板1背部由粘结剂将标准太阳能电池组件与U型铜质通道26粘成一体，如图3、图4所示。U型铜质通道26为冷却水吸收光伏电池板背面热量的通道，并在合适位置加装支架固定通道。冷却水经冷却通道进口27进入通道中，吸收热量后由冷却通道出口28到蓄水箱6混匀后，经小功率循环泵7泵入烟囱式散热器8中散热。 On the back of the solar cell panel 1, the standard solar cell module and the U-shaped copper channel 26 are bonded together by an adhesive, as shown in Fig. 3 and Fig. 4 . The U-shaped copper channel 26 is a channel for the cooling water to absorb the heat on the back of the photovoltaic panel, and a bracket is installed at a suitable position to fix the channel. Cooling water enters in the channel through the cooling channel inlet 27, and after absorbing heat, it is mixed by the cooling channel outlet 28 to the water storage tank 6, and then pumped into the chimney radiator 8 through the low-power circulation pump 7 to dissipate heat.
如图5所示，烟囱式散热器8包含烟囱结构、散热排9、冷却风扇10、冷却风扇11、温差模块散热薄铜管13。光伏电池板的冷却除垢水经过散热排9时将热量散发到烟囱环境中，冷却风扇10由2组温差模块提供电能持续加强散热排的对流散热效果。冷却风扇11则需要由温度控制器判断是否需开启加强其散热效果。温差模块散热薄铜管13主要用于控制温差发电片的冷端温度在固定范围，其弯管圈数和弯曲直径是通过电池板可能达到的最大温度和烟囱式散热器中空气的额定流速计算得到，设计中按照环境温度25℃计算，需要7圈，其直径为0.14m。 As shown in FIG. 5 , the chimney radiator 8 includes a chimney structure, a radiator 9 , a cooling fan 10 , a cooling fan 11 , and a thin copper tube 13 for heat dissipation of a temperature difference module. The cooling and descaling water of the photovoltaic panels dissipates heat into the chimney environment when passing through the radiator 9, and the cooling fan 10 is supplied with electric energy by two sets of temperature difference modules to continuously enhance the convective heat dissipation effect of the radiator. The cooling fan 11 needs to be judged by the temperature controller whether it needs to be turned on to enhance its heat dissipation effect. The heat dissipation thin copper pipe 13 of the temperature difference module is mainly used to control the temperature of the cold end of the thermoelectric power generation sheet within a fixed range. The number of turns and the diameter of the bend are calculated based on the maximum possible temperature of the battery board and the rated flow rate of the air in the chimney radiator. It is obtained that, in the design, calculated according to the ambient temperature of 25°C, 7 turns are needed, and the diameter is 0.14m.
本发明装置有8组温差发电模块，每片温差发电片两面都紧贴太阳能电池和水冷头，因此存在温差，产生电流，其中6组温差模块的发电量通过电源控制器由蓄电池储存，剩余2组所发电能则经过温度控制器的升压、稳流后供给烟囱式冷却器中的强排风风扇11 (额定功率为0.6W)，用于加强光伏电池冷却水散热，降低光伏电池温度，提高光伏电池的光电转化效率。该结构可以使强排风风扇11在更高的温度下得到的更多电能，转速提高，对冷却水的冷却效果增加，这样系统自身就具有反馈调节的作用。而辅助风扇是由温度控制器来判断是否开启的，当测量的电池板温度达到临界温度时，启动辅助风扇，用以加强散热器的散热效果。临界温度是由下式通过通道中冷却水的流速、光伏电池板背面温度、散热排的效率、面积以及辅助风扇10的功耗等计算得到， ，，(下标“a”、“wa”、“wc”、“c”、“r”分别为空气的、与空气接触的、与冷却通道所接触的以及冷却介质和散热器的相关参数)。在环境温度为25℃，风扇2的额定功率为2.4W时，计算得到最佳的临界温度为51.3℃。当电池板温度高于该温度是，启动辅助风扇10使之降低到额定温度，此时不会造成额外功耗。 The device of the present invention has 8 sets of thermoelectric power generation modules, and both sides of each thermoelectric power generation sheet are close to the solar cell and the water-cooled head, so there is a temperature difference to generate current, and the power generation of 6 sets of thermoelectric modules is stored by the battery through the power controller, and the remaining 2 The power generated by the group is boosted and stabilized by the temperature controller, and then supplied to the strong exhaust fan 11 in the chimney cooler (rated power is 0.6W), which is used to strengthen the cooling water cooling of the photovoltaic cells and reduce the temperature of the photovoltaic cells. Improve the photoelectric conversion efficiency of photovoltaic cells. This structure can make the strong exhaust fan 11 obtain more electric energy at a higher temperature, increase the rotating speed, and increase the cooling effect on the cooling water, so that the system itself has the function of feedback regulation. The auxiliary fan is judged by the temperature controller whether it is turned on. When the measured temperature of the battery board reaches the critical temperature, the auxiliary fan is started to enhance the heat dissipation effect of the radiator. The critical temperature is calculated by the following formula through the flow rate of cooling water in the channel, the temperature on the back of the photovoltaic panel, the efficiency and area of the radiator, and the power consumption of the auxiliary fan 10, etc., , , (The subscripts "a", "wa", "wc", "c", and "r" are the relevant parameters of air, contact with air, contact with cooling channel, cooling medium and radiator respectively). When the ambient temperature is 25°C and the rated power of the fan 2 is 2.4W, the calculated optimum critical temperature is 51.3°C. When the temperature of the battery board is higher than the temperature, start the auxiliary fan 10 to reduce it to the rated temperature without causing additional power consumption.
装置中烟囱式散热器是利用烟囱效应的散热结构，散热部件主要安装在烟囱顶部，当冷却水温度与环境温度差越大，烟囱中的抽力越大，因此换热效果越大，这样就使得散热器本身对太阳能电池板的温度具有反馈调节的作用，同时也能够将一部分热量转化为动能，降低了对环境的热污染。烟囱采用正方形结构，结构尺寸由下式通过年环境平均风速和预测电池板的温度以及散热排的结构尺寸确定。烟囱高取1.5m, 经计算底部边长为0.16m,顶部边长为0.12m，此时烟囱可以得到最大抽力。，， (其中，hv为烟囱的抽力，，J/m3；g重力加速度，m/s2；Δhd动压头增量，，J/m3；ρg室温下空气的密度，，Kg/m3；ρgˊ烟囱中平均温度下空气的密度，，Kg/m3；hL为烟囱的阻力损失，，J/m3；下标2、3分别表示烟囱的底部和顶部截面位置；ρ0表示0℃时空气的密度，为1.293Kg/m3；ξ为烟囱内的阻力系数，在本方案中取0.02；“–”表示烟囱中的平均值；tg为外界空气温度，H为烟囱的高度，取1.5m；d为烟囱的直径，m)。 The chimney radiator in the device is a heat dissipation structure using the chimney effect. The heat dissipation components are mainly installed on the top of the chimney. When the temperature difference between the cooling water and the ambient temperature is greater, the suction force in the chimney is greater, so the heat transfer effect is greater, so that The heat sink itself has the function of feedback adjustment to the temperature of the solar panel, and can also convert part of the heat into kinetic energy, thereby reducing thermal pollution to the environment. The chimney adopts a square structure, and the structural size is determined by the following formula through the annual average wind speed of the environment, the temperature of the predicted battery panel, and the structural size of the radiator. The height of the chimney is 1.5m. After calculation, the length of the bottom side is 0.16m, and the length of the top side is 0.12m. At this time, the chimney can get the maximum suction. , , (where h v is the draft of the chimney, , J/m 3 ; g acceleration of gravity, m/s 2 ; Δh d dynamic pressure head increment, , J/m 3 ; ρ g the density of air at room temperature, , Kg/m 3 ; ρ g ˊThe density of the air at the average temperature in the chimney, , Kg/m 3 ; h L is the resistance loss of the chimney, , J/m 3 ; subscripts 2 and 3 represent the cross-section positions of the bottom and top of the chimney respectively; ρ 0 represents the density of air at 0°C, which is 1.293Kg/m 3 ; ξ represents the resistance coefficient inside the chimney, in this scheme Take 0.02; "-" means the average value in the chimney; t g is the outside air temperature, H is the height of the chimney, 1.5m; d is the diameter of the chimney, m).
本发明经过试验验证证明其具有较强的可行性和稳定性。在环境温度22～28℃，外界风速约2m/s时，可以保证发电量在模拟结果的75W上下波动，且发电量随温度变化的波动幅度小于常规冷却方式下的波动幅度。 The present invention is verified by experiments to prove that it has strong feasibility and stability. When the ambient temperature is 22-28°C and the external wind speed is about 2m/s, the power generation can be guaranteed to fluctuate around 75W of the simulation result, and the fluctuation range of power generation with temperature is smaller than that under conventional cooling methods.
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