本太陽光電熱能複合系統結合反射板之系統參數最佳化之研究，係探討增置南北兩片反射板及調整水循環系統對系統之電效率及熱效率增益，建置此反射板需考慮多項參數，如：反射板材質、反射板尺寸及反射板角度等，在水循環系統調整方面選擇調整循環水流速及出入水口溫度兩項。
因每季太陽之起落角度位置差異，本研究為使研究更加嚴謹，分別於11至1月、2至4月、5至7月及8至10月，實驗運用田口直交表規劃實驗，分析其發電效率及儲熱效率之最佳化參數，且利用變異數分析檢視各參數之影響力，並使用主成份分析法計算各組實驗之主成份得點，再將結果利用迴歸分析建立反應曲面法模型，檢視各因子間關係圖及影響主成份得點程度，最後使用最陡坡度求得最佳化參數，並進行確認實驗驗證理論。
此外本研究將確認實驗之環境資料輸入對應公式求取當日之逐時日照量，再依反射板理論計算增置反射板後之日照量增益值，並利用增益值代入模擬軟體TRNSYS，模擬電能輸出及儲水槽水溫，計算發電效率及儲熱效率並與實體確認實驗做比較，於三季確認實驗中反射板增置前後發電量可增加約17%及儲熱量可增加約33%，換算發電量可增加約0.144kWh及儲水槽溫度可增加約2.16℃，且經研究證實後預測誤差小於5%，可做為往後研究發展之參考，有助於提升目前太陽能相關產品之效率。

This study optimized the system parameters for a photovoltaic thermal system (PV/T System) combined with reflectors, and discussed the gain of electrical efficiency and thermal efficiency on the system by adding two reflectors on each of the south and north sides, as well as by adjusting the water circulation system. Multiple parameters must be considered for the installation of a reflector, such as its material, size, and angle of installation. For the adjustment of the water circulation system, the water circulation speed and temperature are the main parameters. As the rising angle and position of the sun varies each season, in order to make this study more rigorous, experiments were conducted from November to January, February to April, May to July and August to October. The Taguchi Method was applied for experimental planning to analyze the optimal parameters for electrical efficiency and thermal efficiency. Analysis of Variance (ANOVA) was conducted to examine the influential power of the parameters, and Principal Component Analysis (PCA) was used to calculate the principal component point of each experiment. The results were analyzed through regression analysis to construct a Response Surface Methodology (RSM) model with which to examine the relation diagram among the factors and the degree of influence on the principal component point. Finally, the Steepest Descent Method was used to obtain the optimal parameters and validate the experimental theories. This study inputted the verified environmental data from the experiment into the corresponding equations to obtain the hourly sunshine amount, and applied the reflector theory to calculate the gain of sunshine amount after installing the reflector. Moreover, the gain was inputted into the simulation software TRNSYS to simulate the electrical power output and the water temperature in the water storage tank, as well as to calculate the electrical efficiency and thermal efficiency. The results were then compared with the experiment. The confirmatory experiments of the three seasons found that the electrical energy after installing the reflector increased by 17%, and the thermal energy increased by 33%. After conversion, the power generation could be increased by 0.144kWh and the water temperature in the water tank could be increased by 2.16℃. The experiment confirmed that the prediction error was less than 5%. The results could serve as a reference for future studies to improve the efficiency of solar power related products.

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