A steam pipe, which is 100 mm external diameter, carries 0.75 kg/s of wet steam at 4 MPa. The steam enters the pipe with

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A Steam Pipe Which Is 100 Mm External Diameter Carries 0 75 Kg S Of Wet Steam At 4 Mpa The Steam Enters The Pipe With 1 (25.95 KiB) Viewed 30 times

A steam pipe, which is 100 mm external diameter, carries 0.75 kg/s of wet steam at 4 MPa. The steam enters the pipe with a dryness fraction of 0.99. It is covered with two layers of lagging. The inner and outer layers are 25 and 40 mm thick, respectively. The coefficients of thermal conductivity for the two layers are 0.07 W/mK for the inner layer and 0.17 W/mK for the outer layer. The surface transfer coefficient for the outer surface is 12.5 W/m2K. The ambient temperature is 25 °C.. Determine: 4.1 The heat loss per hour for a 65 m length of lagged pipe (9) 4.2 The surface temperature of the lagging (2) 4.3 The interface temperature (2) 4.4 The dryness fraction of the steam exiting the pipe (3) ram