5744Chemical EngineeringMedium
The rate of heat transfer through a pipe wall is given by, q = 2π k (Ti – T0)/ln (ri/r0). For cylinder of very thin wall, q can be approximated by________?
Aq = 2π ri k (Ti – T0)/(r0/ri)
Bq = 2π k (Ti – T0)/(r0/ri)
Cq = 2π k (Ti – T0)/[(r0 + ri)/2]
Dq = [2π k (Ti + T0)/2]/ln (ri/r0)
Correct answer
C. q = 2π k (Ti – T0)/[(r0 + ri)/2]
Explanation
The correct answer is q = 2π k (Ti – T0)/[(r0 + ri)/2].