The equivalent diameter for the annulus of a double pipe heat exchanger, whose inner pipe has fins on the outside is ______________ compared to the same size pipes without fins?

Related Mcqs:

The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m2.K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m2.K. The overall heat transfer co-efficient at this time is _____________________?

A. 1200 W/m2.K B. 894 W/m2.K C. 333 W/m2.K D. 287 W/m2.K...

If heat transfer rate varies with the time, it is termed as__________________?

A. Forced convection B. Steady state conduction C. Monochromatic radiation D. None of these...

In a co-current double pipe heat exchanger used for condensing saturated steam over the inner tube, if the entrance and exit conditions of the coolant are interchanged, then the rate of condensation will___________________?

A. Increase B. Decrease C. Remain unchanged D. Either increase or decrease; depends on the coolant flow rate...

Which of the following parameters of the fluid is not very important, while deciding its route in a shell and tube heat exchanger ?

A. Corrosiveness & fouling characteristics B. Pressure C. Viscosity D. Density...

In the free convection regime of pool boiling, the heat flux is proportional to__________________?

A. Δt1/2 B. Δt2 C. Δt5/4 D. Δt...