Задача 40 Трубопровод состоит из трех участков

Task 40 The pipeline consists of three sections connected in series with each other. The diameters and lengths of the material and the condition of the pipes are known. The marks of the initial A and final B sections of the complex pipeline are also set. At point A there is a concentrated flow Q, at the second site there is a uniformly distributed flow Qp. At point B, the value of the free head hcv is set. Determine the costs on the sections and the required pressure of the Ntr at point A, taking local losses of 10% of the losses along the length.
d1 = 150mm, d2 = 200mm, d3 = 250mm, L1 = 150m, L2 = 100m, L3 = 200m, cast iron new, bituminized, A = 112m, B = 118m hcv = 5m, Q/Qp = 60/21 l/s.

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