Question

Short A (2 points 1.How does the a shell and tube heat ese U, depend on the mass ow) tb a counter-flow heat exchanger.2 ke's of hot water fows nows on the shell side. Which now wll experience the largest A) cold water hot watet C) The change is the largest temperature change? 3. Liquid A is fed to a t exchanger Thed to a tube of a heat exchanger and the coolant dliquid B) is fed to the shel side of the plot best represents how the temperature does not change because it is at its saturation temperature. Which temperature of A changes with distance down the tube? Distance 4. Water in a pan is on a stove. Boiling occurs when the temperature of fluid in the bulk/at the pan-liquid interface (circle one) is greater than(fill in). 5. Heat fl ux associated with boiling is always greater at a greater excess temperature (True or False).

Answer 1

o Answer is: (B) B mtubes * Even at zero mass How rate, Overall Heat transfer coefficient will not be zero, since there will be Heat transfer as a result of temperature gradient

And is (B) hat water [Explanation Energy Balance Man (Th. The) me cope (TG-TC) [ano e (The Tha) 8hgls 2 (TS-TC Me mh qkgls (Th, - The) > (TG- TC) Largest temperature with the Dupoviemed by the hot water. » Ans is Explanation * It is not a straight line function So Not A. * an curve 'A', the change in temperature in front position stays flat, which is not true.

of * Saturation temperature is the temperature when Initial position temperature will drop as briforaturs gradient will be higher initially So Ans is "C" Water in a pan is on a stave. Boiling occurs when the temperature of fluid is greater than Saturation temperature at a atmospheric presure quien the Vapour pressure. Equals the atmospheric pressure * Bailing occurs when Vapour pressure is greather than atmospheric pressure Explanation ?

② Heat flux is associated with boiling is always greater at a greater eness temperature False Explanation * From the given plat below, Hun (RIA) VIS encess it can be seen tham as (AT) incess increases fun is not always increases, it decreases sometimes also So It ý False .

A pest of (1) Vis (steness Natural Nuntiate Convention bailing Thansistion Balling A will give "boiling Curve Filum Balling for Water) c. (Vanone (Clubicat at 106 mom heat fem) 107 Reinsteny est ponty A 104 Consity Nucllate Boiling 3 16 15 10 80 100 190 Bency (Ts st) 1000