Question:-
Consider the following statements:
The pressure in a horizontal capillary tube of a refrigeration system decreases due to the
1. frictional resistance offered by the tube wall
2. acceleration of refrigerant in the tube
3. heat transfer from the tube wall
4. decrease in the potential energy
Which of these statements are correct?
Option (A)
1 and 4
Option (B)
2, 3 and 4
Option(C)
1, 2 and 3
Option(D)
1 and 2
Correct Option:
(D)
Question Solution:

DP = fn(I,d,v)
PC - PE = DP = DP1 + DP2
Momentum pressure drop due to flashing in vapour so pressure drops.
Frictional drop due to viscosity of refrigerant and walls.
question-answer-faq-9396