Water flows through a cast steel pipe ( k = 50 W/m.K ) with an...

Water flows through a cast steel pipe ( k = 50 W/m.K ) with an outer diameter of 104 mm and 2 mm wall| thickness. (i). Calculate the heat loss by convection and conduction per metre length of un insulated pipe when the water temperature is 15 °C , the outside air temperature is -10 °C , the water side heat transfer coefficient is 30 kW/m?.K and the outside heat transfer coefficient is 20 W/m2.K.
(ii). Calculate the corresponding heat loss when the pipe is lagged with insulation having an outer diameter of 365 mm, and thermal conductivity of k= 0.05 W/m.K?

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Asked by Exam Setting on 10th May, 2022