42 Hot water at 50 C is routed from one building in which it

Last updated: 6/13/2023

42 Hot water at 50 C is routed from one building in which it is generated to an adjoining uilding in which it is used for space heating Transfer between the buildings occurs in a eel pipe k 60 W m K of 100 mm outside diameter and 8 mm wall thickness During e winter representative environmental conditions involve air at T 5 C and V 3 m s cross flow over the pipe a If the cost of producing the hot water is 0 10 kWh what is the representative daily cost of heat loss from an uninsulated pipe to the air per meter of pipe length The convection resistance associated with water flow in the pipe may be neglected b Determine the savings associated with application of a 10 mm thick coating of urethane insulation k 0 026 W m K to the outer surface of the pipe