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題名 | 屋脊式太陽能集熱器性能之模擬與研究= |
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作者 | 馮丁樹; 黃山樵; |
期刊 | 農業工程學報 |
出版日期 | 19880300 |
卷期 | 34:1 1988.03[民77.03] |
頁次 | 頁1-15 |
分類號 | 446.56 |
語文 | chi |
關鍵詞 | 太陽能; 性能; 屋脊式; 集熱器; |
中文摘要 | 太陽能是一種相當乾淨的熱源,無汚染之顧慮,且無需支付燃料費,其應用甚為有利。尤其在交通不便的地區,更為適用。太陽能應用於穀物乾燥方面,已有相當良好之成就。國內外有關此方面之文獻甚多,但配合國內農民使用之循環式乾燥機型者則甚為少見。本文卽提供一簡單之構想,以解決農民在此方面應用時所可能發生之困難。 一般言,農民購置循環式或貨櫃式乾燥機後,通常仍須花一筆經費建造廠棚。在此種客觀之情況下,若能利用此廠棚屋頂的結構加以改良,使之旣能保持遮棚功效,又能利用太陽能以取代部分燃油消耗,實屬一舉數得之事。 因此本研究卽針對屋脊式太陽能集熱器的性能加以分析探討,並利用電腦程式來模擬其運作情形,盼能從中找出一個較佳的操作狀況。此外並對以加裝隔板之方式對整個系統性能的影響作一簡單的探討,以供未來設計時參考。 國內、外對於一般平板式太陽能集熱器性能的研究相當多,本文乃參考其分析方法,再綜合筆者自身見解擴充而成為本模式,並以室外實際測試結果加以驗證。研究結果證實在無隔板及單一隔板時本模式的可信程度相當高,但隨着隔板數目的增加,誤差亦有顯著的增大。試驗結果可得以下幾點結論: 1.通風量的增加有助於有效能量的提高,然其進出口溫差會減少。 2.隔板的安裝確實能增加集熱效率,且使用較大、較多數目的隔板,其所產生的效果亦比較好。 |
英文摘要 | Farmers who bought circulating or container type driers usually have to spend extra expenses building a machinery shed for them. Under such circumstances, it causes worth of designing a solar collector incorporated with the machinery shed such that it can supply the heated air to the drier to replace some energy consumption with little of additional expense. Purposes of this study are to investigate an inverted V-shape solar collector, accompanied with a use of an interactive program to simulate the performance of system and to find the optimal operating conditions. Besides, the effects of separators on the performance of whole system were also studied. Analysis on the model shows that the model is very reliable as no separator or only one separator is used. The deviation, however, was evidently found increasing as the numbers of the separator increase. The result of experiments leads to the following conclusions: 1. As the airflow rate increases, the available energy increases but the difference of air temperature between inlet and outlet tends to decrease. 2. The installations of separators would certainly increase the collector efficiency, and, therefore more and larger separators used will tend to better the performance of collectors. |
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