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標題: | 應用主動式散熱於水面型太陽光電之效益研究 Analysis of the Potential for Use of Active Cooling on Floating Solar Panel |
作者: | Chuan-Chung Jen 任傳中 |
指導教授: | 陳希立 |
關鍵字: | 水域型太陽能光電,太陽光電主動式散熱,太陽能板溫度模型,太陽能光電板效率改善,主動式散熱最佳操作模式, Floating solar photovoltaic system,Active cooling on solar panel,Temperature model for solar panel,Solar panel efficiency enhancement,Optimized operating temperature of active cooling, |
出版年 : | 2019 |
學位: | 碩士 |
摘要: | 本研究旨在探討水域型太陽光電之發電能力,與應用主動式散熱之效益。由於水域型場域本身的散熱效果,水域型光電能在較低的模組溫度工作,提升轉換效率,再者,水域型光電接近水源,進行主動式水冷散熱成本較低,具有發展優勢。研究透過實驗分析與數學模型相互驗證。實驗部分,架設一模擬水域型光電系統,並設計前板水膜與背板噴霧散熱作為主動式散熱方法。蒐集天氣條件變化下,不同散熱模式之模組溫度與發電效率等數據,建立與驗證數學模型,並以數學模型為基底計算設定主動式散熱最佳啟停溫度,最終希望透過實驗與數據分析,討論水域型光電不同散熱模式之發電效益。
本研究建立一適用於水域型光電之太陽能板溫度模型,以能量方程式為基底,將太陽能板分為前板、背板、中心晶片,討論不同材質之熱阻與邊界條件熱傳,數據驗證結果,相比於NOCT模型與等溫模型,計算精準度都有明顯提升,計算被動式冷卻在不同天氣條件下RMSE皆低於1.0℃;主動式前板冷卻下RMSE為2.4℃:主動式背板冷卻下RMSE為1.7℃。可見在此模型可充分計算不同散熱形式下之太陽能板溫度。 實驗結果顯示,在夏季日照條件下,水域型光電由於其冷卻效果,平均溫度較屋頂型低4.03℃,平均發電量可增加3.27%。採用主動式前板水膜散熱,可降低太陽能板平均溫度19.39℃,增加發電量6.70%,扣除水泵之淨輸出功可提升5.27%。採用主動式背板噴霧散熱,在最佳啟停溫度設定的長時間日照條件下,可降低太陽能板平均溫度16.29℃,增加發電量6.38%,扣除水泵之淨輸出功可提升3.93%,有明顯散熱效益。 The objective of this research is to discuss the power generation of floating solar photovoltaic systems, and the benefit of the use of active cooling on floating solar panel. Due to the cooling effect of water evaporation, floating solar panel can work in lower operating temperature and enhance the efficiency. Moreover, the high availability of water makes active cooling technique economically viable. The research develops a simulation floating solar system and mathematical model to validate experimental results. The experiment sets up a solar panel on the cooling tank to simulate the cooling effect of floating system, and designs water film cooling on front panel and water spray cooling on back panel as active cooling methods. The experiment system collects data under different climate conditions and active cooling modes to validate the mathematical model. Then we use the calculating temperature baseline to figure out the optimized operating temperature of active cooling. Eventually, the experiment will operate in summer with sufficient solar radiation to compare the power generation between different cooling modes on floating solar panel. The research develops a temperature model based on energy equation for floating solar panel. The model calculates the heat transfer between three different materials in the solar panel and the boundary conditions. This model has better accuracy performance than other temperature model such as NOCT model or lumped system model. The model has lower RMSE 0.97℃ in passive cooling mode , RMSE 2.36℃ in water film cooling mode and RMSE 1.71℃ in water spray cooling mode. In conclusion, this model is suitable to predict surface temperature of solar panel for different types of cooling methods. The results show that the average temperature of floating solar panel is 4℃ lower than rooftop solar panel, which leads to 3.27% power increase. With water film cooling, the average temperature is 19.39℃ lower and the power generation is 6.70% increase. After deducting the power operating the cooling system, the net energy gain is 5.27% increase. With water spray cooling, the average temperature is 16.29℃ lower and the power generation is 6.38% increase. And the net energy gain is 3.93%. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/73775 |
DOI: | 10.6342/NTU201903878 |
全文授權: | 有償授權 |
顯示於系所單位: | 機械工程學系 |
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