頁籤選單縮合
題名 | 溫室細霧冷卻系統之開發與性能研究 |
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作者 | 陳加忠; 陳志昇; | 書刊名 | 農業工程學報 |
卷期 | 40:2 1994.06[民83.06] |
頁次 | 頁78-87 |
分類號 | 435.16 |
關鍵詞 | 細霧; 冷卻系統; 溫室; Mist; Cooling system; Greenhouse; |
語文 | 中文(Chinese) |
中文摘要 | 為疏解臺灣地區設施栽培所用溫室夏季熱累積問題,利用蒸發冷卻技術可使溫室內溫度低於大氣溫度,因此對使用者之生產栽培產期調整幫助極大。傳統式水簾與風扇之配合設備能夠提供穩定之降溫性能,但是由於水簾內水份於停止使用時不易蒸發,產生青苔與長菌等問題,而其成本昂貴,無法為業者利用。本研究中利用與傳統水牆相同作業原理,開發試驗細霧型降溫系統,以噴頭提供蒸發冷卻所需水量,並增加水滴與空氣之作用時間以增加作業效率,並以熱能平衡原理以量化溫室內溫度分佈梯度。研究結果顯示,此型噴霧降溫系統之作業效率接近80%,降溫性能使溫室內溫度低於大氣溫度5~7℃,增加風扇能力以提高溫室內空氣速度可使降溫效果更均勻。溫室降溫模式對於溫室內部縱向溫度梯度現象預測能力良好,準確於5%以內。增加遮蔭率與增大溫室內風量為提高降溫能力之有效方式,但必須配合作物之需求加以利用。此型噴霧降溫系統結構簡單,成本低廉,適合國內設施業者使用。 |
英文摘要 | In order to relieve the problems of heat accumulation for greenhouse in summer, the technique of evaporative cooling was an effective method to reduce the temperatures of the inside greenhouse lower than those of outside air. It could provide the opportunity for the farmers to adjust the harvest periods for culture under protections. The traditional equipments of pad and fan have the stable cooling performance, however, the moisture within the water adsorbing materials of the pad could not be evaporated completely at the rest time, then the serious mold and fungi development would be happen. Because the materials of fan and pad all were imported from abroad, the high cost of equipments decreased the demand for farmers. In this study, the evaporative cooling principle same as pad and fan was adopted to develop a mist cooling system. The required water for evaporating was provided by nozzles operated by high pressure pump. The special design of long path for air flow encounted with mists increased the evaporative efficiency. A thermal model was established to quantify the temperature distribution gradient in the greenhouse. The results of this research indicated the operated efficiency of the mist cooling system was nearly 80%. The temperature of inside greenhouse can be lower 5-7℃ than those of outside air. The accuracy of the temperature predictive performance is within 5%. Increase the shading ratio and ventilation rate were the dominant factors to increase the cooling ability, however, the growing conditions for crops planted in the greenhouse need to be considered. The structure of this equipments developed in this study was simple and inexpensive. It was worthed recommending to farmers. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。