A round duct network is shown schematically in Fig. P XXXXXXXXXXThe lengths of the duct sections and the air flow rates are indicated. (i) Size the ducts using the equal friction method. Assume a...

A round duct network is shown schematically in Fig. P11.6.1. The lengths of the duct sections and the air flow rates are indicated. (i) Size the ducts using the equal friction method. Assume a constant pressure loss rate of 2.5 Pa.mí1 . The loss coefficient for the diffusers is 0.2. Estimate the loss coefficients for the fittings from the data given in Table 11.1. (ii) Calculate the total pressure loss from 1 to 7, 1 to 10 and 1 to 13.