... 0, 216 m d3 = d2 + 2 = 0, 216 + 2.0 ,12 = 0,456 m. 456.0 .14 ,3 .10 1 216 456ln 11 6,0 .14 ,3.2 1 200 216 ln 216 .14 ,3.2 1 2,0 .14 ,3 .11 6 1 1k 1 +++= k 1 = 0,9 W/m.K, ql = 0,9.(300-25) ... += 1 1FF 1 122 1 1qd F2 = 2.(0,3 + 0,3).3 = 3,6 m2, += 1 3,0 1 6,366,095,0 1 1qd 13 74 10 0300 10 050066,0.67,5.675,0Q44 21 == Q 1- 2 = 13 74 ... trên 1 m chiều dài ống theo (4-7): )tt(kq2f1f 11 = ; W/m, 32232i2i 11 1d 1 ddln2 1 ddln2 1 d 1 1k+++= ; W/m.K d 1 = 0,2 m; d2 = 0, 216 m d3 = d2 + 2 = 0, 216 +...