PHYSICS Chapter Notes - Chapter 2: Thermal Energy Storage, Heat Transfer Coefficient, Thermal Conductivity
Document Summary
Q. 1: a hollow cylinder 6cm inner diameter, 9cm outer diameter, has a heat generation rate 5 106 w/m3. Q. 2: steam in a heating system flows through tubes whose walls are maintained at a temperature of 150 c. 50 w/m c) of outer diameter d2= 6 cm and constant thickness f = 2mm are attached to the tube, as shown in figure. The space between the fins is 3mm, and thus there are 200 fins per meter length of the tube. Heat is transferred to the surrounding air at t = 25 c, with a combined neat transfer coefficient of h= 70w/m2 c. Determine the increase in heat transfer from the tube per meter of its length as a result of adding fins. Q. 3: a thermal energy storage unit consists of a large rectangular channel which is well insulated on its outer surface and encloses alternating layers of the storage material and the flow passage as given below in figure.
