In a chiller unit R-123 evaporates at -20ºC in 1-cm-inside-diameter horizontal tubes. The inside surface temperature of the tubes is estimated as 5ºC and film boiling is assumed. Saturated liquid flows in at 20 g/s and is to leave as saturated vapor. Estimate the necessary tube length required. Use hnf = 183.4 kJ/kg and hng = 367.9 kJ/kg for R-123.
What will be an ideal response?
Assuming forced convection in the horizontal tubes, Equation 10-19 can be used to
predict the convective heat transfer coefficient and using an energy balance the length
of the tubes can be determined. The properties of R-123 at 300 K, from Appendix Table
You might also like to view...
At the highest point on the path of a projectile, its vertical acceleration
a. equals g pointing downwards. b. equals g pointing upwards. c. is zero. d. is undetermined. e. does not exist.
What is the de Broglie wavelength of an electron traveling 100 m/s?
The natural tendency of an object to remain at rest or in uniform straight-line motion is called ______________
Fill in the blank(s) with correct word
In a certain region of space, lines of constant positive electric potential around a positive charge get farther apart as one moves to the right. The force on a negative charge in this region will point to the ________.
Fill in the blank(s) with the appropriate word(s).