Specify the radius in mm to the centerline of a 90 degree bend in a 1 in type k copper tube to acheive the minimum energy loss. For such a bend carrying 250 L/min of water at 80'C, compute the energy loss. Compare the results with problem 10.41 problem 10.41 A 1 in type k copper tube supplies hot water 80 C to a washing system in a factory at a flow rate of 250L/min. At several points in the system a 90 degree bend is required. Compute the energy loss in each bench if the radius outside of the bend is 300mm