PERFORMANCE EVALUATION OF HIGH EFFICIENCY PHOTOVOLTAIC POWER-GENERATION SYSTEM EQUIPPED WITH A COOLING DEVICE

带冷却装置的高效光伏发电系统性能评估

• 批准号: 12558053
• 负责人: NAWATA Yutaka
• 金额: $ 2.43万
• 依托单位: YATUSHIRO NATIONAL COLLEGE OF TECHNOLOGY (Y.N.C.T.)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12558053/
• 关键词: PHOTOVOLTAIC POWER GENERATION SYSTEM; PHOTOVOLTAIC; COOLING DEVICE; HIGH EFFICIENCY; CLEAN ENERGY; NATURAL ENERGY; 代替エネルギー; 地球温暖化; 太陽エネルギー; エネルギー変換; 太陽光発電

Recently, the photovoltaic (PV) power generation system has attracted attention as one of clean energies. Especially, residential roofing PV system connected with power grids has been popularized as a result of increasing concerns over global warming and continuing decline in PV manufacturing costs.The power generated by the PV module increases with irradiance, but it decreases as PV module temperature becomes high. The PV temperature depends on ambient temperature, and becomes more than 60℃ in summer. Therefore, the power generated does not necessarily increase even if tit irradiance increases in summer However, if the PV modules were cooled under such a high PV temperature condition, more electrical power would be obtained from PV modules.In this study, a PV power generating system equipped with a cooling device has been developed. The major components of the system are an array of PV modules and cooling panels attached to the backside of the PV modules. The respective PV module is cooled with cooling water flowing through a narrow gap in each cooling panel. Hot water discharged from the cooling panel is delivered to a storage tank and can be reused in anywhere. In order to save energy for introducing cooling water into the panel, siphonage from an upper level of a building to the ground level is utilized. A siphon tube is connected to a discharge port of the cooling panel, thus the pressure at the discharge port becomes negative. Cooling water enters into the bottom end of the cooling panel at atmospheric pressure and goes up to the top, discharge side. By adopting this cooling water system, we could spread the cooling water evenly over the entire backside of the PV module and thus realized an effective cooling device.As a result, it was confirmed that the cooling of the PV modules increases the electric power and that the reuse of hot water from the cooling panel contributes very much for saving energy consumed for heating water.

近来，光伏（PV）发电系统作为清洁能源之一已经引起关注。特别是随着人们对全球变暖的关注和光伏制造成本的持续下降，与电网相连的住宅屋顶光伏系统得到了普及。光伏组件产生的功率随着辐照度的增加而增加，但随着光伏组件温度的升高而降低。PV温度取决于环境温度，在夏季达到60℃以上。因此，发电量并不一定增加，即使它的辐照度增加，在夏季，但是，如果光伏组件在这样一个高的光伏温度条件下冷却，将获得更多的电功率从PV models.In这项研究中，光伏发电系统配备了冷却装置已经开发。该系统的主要部件是光伏组件阵列和连接到光伏组件背面的冷却板。各个PV模块由流过每个冷却板中的窄间隙的冷却水冷却。从冷却板排出的热水被输送到储罐，可以在任何地方重复使用。为了节省用于将冷却水引入板中的能量，利用从建筑物的上层到地面的虹吸。虹吸管连接到冷却板的排放口，因此排放口处的压力变为负压。冷却水在大气压下进入冷却板的底端，并上升到顶部，排出侧。通过采用这种冷却水系统，可以将冷却水均匀地分布在光伏组件的整个背面，从而实现了有效的冷却装置。结果证实，光伏组件的冷却增加了电力，并且冷却板的热水再利用对节省加热水消耗的能源有很大贡献。

项目成果

古嶋薫, 税所潤平, 縄田豊: "冷却機能付き高効率太陽光発電システムの開発"八代高専紀要. 第24号. 23-29 (2002)

Kaoru Koshima、Junpei Saisho、Yutaka Nawata：“具有冷却功能的高效太阳能发电系统的开发”八代工业大学公告第 24. 23-29 号（2002 年）。

K.Furushima, J.Saisho, Y.Nawata: "Development of High Efficiency Photovoltaic Power-Generation system with a Cooling Device"Research Reports Yatsushiro National College of Technology. No.24. 23-29 (2002)

K.Furushima、J.Saisho、Y.Nawata：“带冷却装置的高效光伏发电系统的开发”研究报告八代工业大学。