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題 名 | 低溫管與高溫管的探討(上)--0℃冷銅管的應用實例分析 |
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作 者 | 林景正; 胡鴻章; 顏宏儒; 施仁傑; 張國華; | 書刊名 | 機械技術雜誌 |
卷 期 | 138 1996.08[民85.08] |
頁 次 | 頁112-122 |
分類號 | 446.6452 |
關鍵詞 | 低溫管; 高溫管; 0℃冷銅管; 蒸發器; |
語 文 | 中文(Chinese) |
中文摘要 | 由於鰻魚養殖為耗用淡水資源最多的養殖魚種。在考慮養殖用水有效利用及循環水 與環境平衡管理目標下,對於水體負荷有極大影響的污濁固形物之運動及生成解析與實態, 乃本文探討重點。本研究應用物質平衡理論,設計鰻池中流速,底質厚度,懸浮物等物質分 布之討測及固形物運動通量計測方法,以解析在給餌前後、日夜間及放養初期末期之間固形 物的生成累積、分解、沈降和再懸浮等變動通量;並從飼料換肉率、單位生產用水量等環境 管理方法檢討其對養殖水體中固形物的累積。選定鹿港日本鰻及美國鰻養殖等兩池為例,在 兩次選吸放養期間,經數個月無清池換水。分別包話放養初期、中期和選別前進行三次現場 計測。每次依據物質分布計測結果得到等物質分布線圖,選擇近給餌處下游作為池中固形物 通量測之參考測站,進行連續兩日間固形物堆積、分解、再懸浮及生成等通量計測。結果顯 示,兩種池的固形在給餌後均較給餌前增為1.5~2.5倍。且大多為殘餌及糞。又日本鰻池中固 形物的分解速率極小,僅0.1~4.5%/日,但美國鰻池則相反,大到17~30%/日。又兩種鰻魚的 成長速度與單位生產用水量均相近。本文應用物質運動理論設計的計測法,可瞭解魚池中污 濁固形物質的動態,以作為循環水系統設計及管理的參考資料。 |
英文摘要 | The purpose of this study was to characterize and modeling the relationship between the water environmental managements and contaminated solid fluxes for an Anguilla japonica and an Anguilla rostrata culture pond. A measuring technique was also presented to determine the solid fluxes on these two ponds. Experimental designs included mass distribution and flux tests in this study. The mass distribution test based upon the relations among water mass balance, flow rate, sediments and suspended solid concentrations to locate the reference positions for flux tests. The flux tests investigated the solids change rates and its moving rates of the sedimentation, decomposition and resuspension in day/night and before/after the feeding within two days testing interval, and three repeats on Anguilla japonica pond, two repeats on Anguilla jastrata pond were tested within the same culture period included summer and winter. The water consumption, weight increased, and feeding rate were also investigated. The results showed that the difference of the particle concentration flux was 1.5 to 2.5 times before and after a feeding on two ponds, so it was clearly found that the particles included suspended solid and sediment increased on these ponds. The particles are mostly residues and feces. The decompostion rate of solids was only 0.1~4.5% / day on Anguilla japonica pond, but it was 17~30% / day on Anguilla rostrata pond. The modeling of materials motion and its measure technique methods could be used to reveal the real state of the contaminated solids flux on any fish pond. |
本系統中英文摘要資訊取自各篇刊載內容。