The interior surface temperature of a 4"" sch 40 plain carbon steel (k = 24.8 btu/hr-ft-r) pipe is 400 f. the exterior is insulated with 1.5 inches of kapok insulation (k = 0.02 btu/hr-ft-r) and the outer surface temperature of the kapok insulation is 75f. what is the heat loss per unit length of pipe?

Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?

The inner surface of a 0.25m thick brick wall of a furnace is kept at 810ºc, when the outside surrounding air is at 22ºc. the convective heat transfer coefficient of the outer surface is 12 w/m2k and the thermal conductivity of the brick is 0.865 w/mk.neglect the convective resistance for the inner side of the furnace and assume that the problem is steady state and thermal radiation is neglected. (a)-sketch the system and calculate the rate of heat loss per unit wall area. (b)-calculate the temperature of the outer wall surface.