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論文名稱 Title |
大型太陽能熱水系統儲熱槽熱水進口位置對系統效率之影響研究 The effect of hot water inlet position of water storage of a large solar hot water system on the system performance |
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系所名稱 Department |
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畢業學年期 Year, semester |
語文別 Language |
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學位類別 Degree |
頁數 Number of pages |
137 |
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研究生 Author |
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指導教授 Advisor |
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召集委員 Convenor |
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口試委員 Advisory Committee |
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口試日期 Date of Exam |
2016-09-02 |
繳交日期 Date of Submission |
2016-09-06 |
關鍵字 Keywords |
數值模擬、太陽能熱水系統儲熱槽之設計、大型太陽能熱水系統 large solar hot water system, storage tank design, numerical simulation |
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統計 Statistics |
本論文已被瀏覽 5697 次,被下載 20 次 The thesis/dissertation has been browsed 5697 times, has been downloaded 20 times. |
中文摘要 |
本研究使用CFD模擬軟體對大型太陽能熱水系統之儲熱槽模型進行三維數值模擬,並結合TRNSYS模組模擬系統之運作,探討無分層之儲熱槽,不同熱水入口位置對系統效率之影響。研究城市以台北、台中及高雄為主,而取負荷時間為中午十二點至晚上十二點 (十二小時)。模型分別為1/4 H (熱水入口位於桶高1/4處)、2/4 H 、3/4 H 及 H。 模擬研究結果發現在相同的取負荷時間下,對一個無分層之儲熱槽而言,儲熱槽不同的熱水入口位置對系統效率之影響不大。 |
Abstract |
In this study, a three-dimensional CFD program is employed to simulate the field in the storage tank of a large solar hot water system. The purpose is to study the effect of the storage tank hot water inlet position on a large solar hot water system performance. The study was done for three representative cities of Taipei, Taichung and Kaohsiung. The load supplying time studied was from 12:00 to 24:00. The hot water inlet positions were studied for at 1/4 tank height ( 1/4 H ) , 2/4 H, 3/4 H and 4/4 H. Simulation results showed that at the same load supplying time, the hot water inlet position of the storage tank had little effect on the system efficiency. |
目次 Table of Contents |
論文審定書------------------------------------------------------------------------------------------ i 誌謝--------------------------------------------------------------------------------------------------- ii 摘要-------------------------------------------------------------------------------------------------- iii ABSTRACT--------------------------------------------------------------------------------------- iv 目錄-------------------------------------------------------------------------------------------------- v 圖目錄-----------------------------------------------------------------------------------------------vii 表目錄---------------------------------------------------------------------------------------------- xiii 符號說明------------------------------------------------------------------------------------------ xiv 第一章 緒論----------------------------------------------------------------------------------- 1 第一節 前言---------------------------------------------------------------------------------- 1 第二節 太陽能熱水系統簡介------------------------------------------------------------ 1 第三節 文獻回顧---------------------------------------------------------------------------- 2 第四節 研究動機與目的------------------------------------------------------------------ 5 第五節 研究方法與架構------------------------------------------------------------------ 5 第二章 基礎理論--------------------------------------------------------------------------- 10 第一節 儲熱槽之物理模型------------------------------------------------------------- 10 第二節 儲熱槽之基本假設------------------------------------------------------------- 11 第三節 儲熱槽之統御方程式---------------------------------------------------------- 12 第四節 系統模組元件之理論分析--------------------------------------------------- 13 第五節 系統模擬運算之邊界條件--------------------------------------------------- 19 第六節 模擬軟體之運算方法---------------------------------------------------------- 21 第三章 數值方法--------------------------------------------------------------------------- 33 第一節 儲熱槽之網格測試------------------------------------------------------------- 33 第二節 SIMPLEC 數值方法----------------------------------------------------------- 34 第三節 太陽能負荷比 ( Solar Fraction )------------------------------------------- 35 第四節 TMY 2氣象資料(臺灣平均氣象年資料)---------------------------------- 36 第四章 結果與討論------------------------------------------------------------------------ 42 第一節 TRNSYS系統與TRNSYS - CFD系統之模擬結果比較------------- 42 第二節 相同模型但不同取負荷時間結果比較------------------------------------ 44 第三節 相同取負荷時間但不同模型結果比較------------------------------------ 45 第五章 結論--------------------------------------------------------------------------------- 116 參考文獻------------------------------------------------------------------------------------------ 118 |
參考文獻 References |
〔1〕陳維新,"能源概論 (五版) ",高立圖書,2011年1月。 〔2〕黃文雄,"太陽能之應用及理論",協志工業叢書,2013年5月。 〔3〕Duffie, J. A. and Beckman, W. A., "Solar Water Heating Active and Passive, " Solar engineering of thermal processes, Fourth Edition, New York, Wiley, pp. 479-504, 1980. 〔4〕Johannes, K. ,Fraisse, G., Achard, G. and Rusaouën, G. "Comparison of solar water tank storage modelling solutions," Solar Energy, vol. 79, pp. 216-218, 2005. 〔5〕Jordan, U. and Furbo, S. "Thermal stratification in small solar domestic storage tanks caused by draw-offs," Solar Energy, vol. 78, pp. 291-300, 2005. 〔6〕Ievers, S. and Lin, W. "Numerical simulation of three-dimensional flow dynamics in a hot water storage tank," Applied Energy, vol. 86, pp. 2604-2614, 2009. 〔7〕Rhee, J., Campbell, A., Mariadass, A. and Morhous, B. "Temperature stratification from thermal diodes in solar hot water storage tank," Solar Energy, vol. 84, pp. 507-511, 2010. 〔8〕Gao, W., Liu, T., Lin, W. and Luo, C. "Numerical Study on Mixing Characteristics of hot Water inside the Storage Tank of a Solar System with Different Inlet Velocities of the Supply Cold Water, "Procedia Environmental Sciences, vol. 11, pp. 1153-1163, 2011. 〔9〕Shue, N. S. "Numerical simulation of Large Solar Hot Water system in storage tank" NSYSU, Master Thesis, 2012. 〔10〕Su, C.Y. "Numerical simulation of a Large Solar Hot Water System with a Stratification Storage Tank for Various Load time" NSYSU, Master Thesis, 2013. 〔11〕Kuan, Y. C. "Numerical simulation study for the performance of a multi-tank large solar hot water system" NSYSU, Master Thesis, 2013. 〔12〕Lin, G. Y. " Numerical simulation study for the performance of a Large Solar Hot Water System with Horizontal Storage Tank" NSYSU, Master Thesis, 2014. 〔13〕Duffie, J. A. and Beckman, W. A., "Flat-Plate Collectors, " Solar engineering of thermal processes, Fourth Edition, New York, Wiley, pp. 236-321, 1980. 〔14〕Klein, S. A., et al., "TRNSYS 16 User’s Manual," 1998. |
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