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Physics, 21.08.2021 14:50 heyhowdy

Một dòng nước nóng chuyển động trong ống đường kính dl/d2=18/22, nhiệt độ nóng vào là 100[0C] nhiệt độ nóng ra khỏi ống là 60[0C]. Nhiệt độ tưởng nóng lên 70[0C] Ông làm bằng kim loại có hệ số dẫn nhiệt là 25|W/m2.độ| Lưu lượng dòng nóng là 0,2 [1/s] a). Tính hệ số cấp nhiệt vào tưởng

b). Tính nhiệt lượng tỏa ra của dòng nóng c). Tính chiều dài ống truyền nhiệt d). Tính hệ số truyền nhiệt biết phía ngoài ống là nước có nhiệt độ trung bình là 40[0C]

theo 2 cách khác nhau.

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Một dòng nước nóng chuyển động trong ống đường kính dl/d2=18/22, nhiệt độ nóng vào là 100[0C] nhiệt...
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