大型強制循環式太陽能熱水系統性能分析探討

Performance Analysis of a Forced Solar Heating System

吳宗憲(Tzung-Hsien Wu)

指導教授 ： 李文興

國立臺北科技大學/機電學院/冷凍空調工程系所/碩士(2006年)

摘要

國內太陽能熱水系統目前以家庭用途為主，宿舍及工商業用途者仍不多。因此研究思考以熱流、控制及最佳化分析等相關學理，建立理論計算模式，以數值模擬的方法，探討大型強制式太陽能熱水系統的水管路與溫差控制器的設置對系統集熱效率的影響，作為太陽能熱水系統廠商施工之參考及依循。研究分為三個部份。一、探討集熱器串並聯片數對於相同片數的強制循環熱水系統的效率分析。二、溫差控制器的設置對系統集熱效率的影響。三、改變系統流量，分析流量對系統效率與水溫的影響。
數值模擬結果顯示，在所分析日照條件下，將進入每個集熱器的流量設定相同時，得到使用全部並聯的方式全日效率最佳。以儲水槽水溫來做比較，全並聯方式水溫混合較均勻。儲水槽採用集熱器出口水溫與儲水槽出口水溫做溫差控制較佳。單片集熱器流量減小時，效率也逐漸變差。

關鍵字

大型強制式太陽能熱水系統 ； 集熱器

並列摘要

Domestic solar heating system is mainly for family use. Industrial and commercial use is still less. This study uses the theory of thermodynamics, heat transfer, control and optimization analysis to build theory model. We use the numerical simulation to analysis the performance of large forced solar heating system with thermal temperature controller. The analysis includes series-parallel number of collectors, position and temperature difference setup of temperature controller and system flow rate.
The simulation result show that the efficiency of forced solar heating system is the best when uses the all parallel model. The temperature controller is good in using in the storage tank outlet and the solar collector outlet. The efficiency decreases as flow rate reduce.

並列關鍵字

forced solar heating system ； solar collector

參考文獻

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