臺灣博碩士論文加值系統

大型太陽能熱水系統之儲熱槽之設計參數對系統效能之影響甚大，然而文獻有關儲熱槽之研究多數是單獨考慮儲水槽本身以及實際不易做到的熱分層之研究，實驗相關的研究參數又過於侷限，因此不足以提供廠商設計準則。因此本文以數值模擬方法研究大型太陽能熱水系統之儲熱槽在加裝多種形式隔板的情形下結合太陽能集熱系統之操作條件與運作情形求得系統之效能，以期能提供提升系統效能之方案。本文進行儲熱槽內部詳細三維熱流模擬，並結合太陽能熱水系統之整體運作模擬，來研究儲熱槽之設計參數對大型太陽能熱水系統效能之影響。以台灣三個代表性城市的氣象資料進行電腦模擬，計算太陽能所能提供每個月熱水需求的百分比，及整年所能提供熱水需求的百分比，也就是太陽能月負荷比(f)及每年負荷比(F)。

This research is aimed to study the storage tank design parameters effects on the efficiency of the large solar hot water system. Detailed CFD simulation for the storage tank coupled with TRNSYS program simulation for the entire solar hot water system will be performed to study the system performance under various thermal stratification baffles design for the storage tank. The study is made for three representative cities of Taiwan by input their typical-meteorological-year data (TMY data). The results indicate the performance of a large solar hot water system can be significantly improved with proper designed thermal stratification baffles in the storage tank.

目錄................................................i
圖目錄...........................................iii
表目錄..........................................viii
摘要..............................................ix
Abstract.........................................x
符號說明.......................................xi
第一章 緒論..................................1
1-1.前言.........................................1
1-2.太陽能熱水系統簡述.................1
1-3.文獻回顧..................................2
1-4.研究方法和結構........................4
第二章 基礎理論............................6
2.1物理模型....................................6
2.2基本假設....................................6
2.3物理模型....................................6
2.4統御方程式(Governing Equation) ..7
2.5邊界條件....................................8
第三章 數值方法..........................13
3.1 模型格點測試..........................13
3.2數值方法..................................13
3.3離散化......................................13
3-4 速度修正方程式.......................15
3-5壓力修正方程式........................18
3-6 SIMPLE演算法.........................19
第四章 儲熱槽測試計算................24
4-1啟動溫差 之測試計算...............24
4-2 隔板之測試計算.......................25
4-3儲熱槽之不同熱水入口測試.......25
第五章 結果與討論........................47
5.1 不同隔板數影響下熱水進入儲熱槽的影響. 47
5.2不同隔板數影響下冷水進入儲熱槽影響......48
5.3 不同形式儲熱槽之系統模擬.......................49
5.4不同熱水入口儲熱槽和不同隔板之系統模擬49
第六章 結論與未來展望.................................107
6.1 結論.............................................107
6.2 未來展望......................................108
參考文獻........................................................109

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