Water is flowing inside a horizontal 1¼ inch schedule 40 steel pipe at 37.8°C and at a velocity of 1.52 m/s. Steam at 108.3°C is condensing on the outside of the pipe wall and the steam coefficient is assumed to be constant at 9100 W/m². K. The length of the pipe is 0.305m. 1.1 Calculate the convective heat transfer coefficient (hi W/m².K) for water inside the pipe? 1.2 calculate the overall heat transfer coefficient (U0 W/m².K) based on the outside surface area? 1.3 calculate the heat transfer rate, q (W) ? Note that you will have to use the trial and the error method. The pipe wall temperature on the inside must be assumed first. As a starting point assume a temperature of pipe wall to be equal to the temperature of water plus 47% of the difference between water and steam temperature .
Water is flowing inside a horizontal 1¼ inch schedule 40 steel pipe at 37.8°C and at a velocity of 1.52 m/s. Steam at 108.3°C is condensing on the outside of the pipe wall and the steam coefficient is assumed to be constant at 9100 W/m². K. The length of the pipe is 0.305m.
1.1 Calculate the convective heat transfer coefficient (hi W/m².K) for water inside the pipe?
1.2 calculate the overall heat transfer coefficient (U0 W/m².K) based on the outside surface area?
1.3 calculate the heat transfer rate, q (W) ?
Note that you will have to use the trial and the error method. The pipe wall temperature on the inside must be assumed first. As a starting point assume a temperature of pipe wall to be equal to the temperature of water plus 47% of the difference between water and steam temperature .
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