Moist air enters a duct at 10ºc, 80% relative humidity, and a volumetric flow rate of 150 m3/min. the mixture is heated as it flows through the duct and exits at 30ºc.
no moisture is added or removed, and the mixture pressure remains approximately constant at 1.0 bar.

for steady-state operation, determine :

a) the rate of heat transfer, in kj/min,
b) the relative humidity at the exit. now solve this same problem using the psychrometric chart.

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise

Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented

Air is compressed isentropically from an initial state of 300 k and 101 kpa to a final temperature of 1000 k. determine the final pressure using the following approaches: (a) approximate analysis (using properties at the average temperature) (b) exact analysis