Mathematics, 17.09.2021 14:00 heids17043

Mỗi giờ có 35kg nước chảy qua ống thép bọc cách nhiệt có chiều dài 10m. Nhiệt độ nước khi vào ống là 900C. Ống thép có đường kính trong 50mm và chiều dày 5mm, lớp cách nhiệt dày 10mm.
Hệ số dẫn nhiệt của ống thép và vật liệu cách nhiệt lần lượt là T = 46 W/mK, CN = 0,12 W/mK
Nhiệt độ mặt ngoài lớp cách nhiệt bằng 250C. Nhiệt độ mặt trong ống thép có thể xem bằng nhiệt
độ của nước.
a) Tính nhiệt độ nước ở đầu ra
b) Tính nhiệt lượng tổn thất trên đường ống.

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Mỗi giờ có 35kg nước chảy qua ống thép bọc cách nhiệt có chiều dài 10m. Nhiệt độ nước khi vào ống...

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