NGHIÊN CỨU THỰC NGHIỆM MỘT DÀN ỐNG CÁNH PHẲNG ĐỂ KHỬ ẨM KHÔNG KHÍ=AN EXPERIMENTAL STUDY OF A DEHUMIDIFYING AIR COIL WITH CONTINUOUS PLATE FINNED TUBE

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Tác giả: The Truyen Le, Minh Phu Nguyen, Tien Tho Trinh

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học Công nghệ và Thực phẩm (Tên mới: Tạp chí Khoa học Đại học Công Thương), 2015

Mô tả vật lý: tr.28-36

Bộ sưu tập: Metadata

ID: 577045

Thêm vào giỏ

An experimental apparatus was established in order to investigate a dehumidifying air coil with continuous plate finned tube. Effects of face velocity of air, water flow rate and water temperature on both cooling load and air pressure drop were presented. The face velocity, the water flow rate and the water temperature are in range of 0.5 to 2 m/s, 12 to 18 LPM and 12 to 18oC, respectively. Meanwhile entering air temperature and relative humidity are maintained about 30oC and 68%. The results showed that both latent load and sensible load increased when the water temperature decreased. Airside pressure drop increased up to 25% when difference between entering water temperature and entering air dew point temperature increased from 5 to 11oC. Counter-current cross flow and cocurrent cross flow arrangements were also compared and results showed that cooling capacity in case of the countercurrent cross flow arrangement is 10% higher, and air pressure drops were negligible difference between the two cases.Một mô hình thực nghiệm đã được thiết lập nhằm khảo sát một dàn ống cánh phẳng để khử ẩm không khí. Ảnh hưởng của vận tốc gió vào dàn, lưu lượng nước, và nhiệt độ nước đến tải lạnh và tổn thất áp suất phía không khí được trình bày. Vận tốc không khí, lưu lượng nước và nhiệt độ nước được khảo sát trong phạm vi 0,5¸2m/s, 12¸18 l/ph và 12¸18oC. Trong khi nhiệt độ và độ ẩm không khí vào là 30oC và 68%. Các kết quả chỉ ra rằng cả tải nhiệt hiện và nhiệt ẩn đều tăng khi nhiệt độ nước giảm. Tổn thất áp suất không khí gia tăng lên đến 25% khi chênh lệch nhiệt độ nước vào và nhiệt độ đọng sương không khí vào dàn tăng từ 5¸11oC. Bố trí lưu động cùng chiều và ngược chiều được so sánh và kết quả chứng tỏ rằng năng suất lạnh trong trường hợp lưu động ngược chiều cao hơn 10%, và chênh lệch tổn thất áp suất không khí của hai trường hợp là không đáng kể.

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