Liquid water enters a cooling tower operating at a steady state 40ºc with a mass flow rate of 105 kg/h. cooled water at 25ºc exits the cooling tower at the same mass flow rate. makeup water is supplied at 23ºc. atmospheric air enters the tower at 30ºc, 1 bar, 35% relative humidity. a saturated moist air stream exits at 34 ºc, 1 bar. determine a. the mass flow rates of the dry air and makeup water, each in kg/h. b. teh rate of exergy destruction within the cooling tower, in kw, for t0 = 23ºc

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?

Find the kinematic pressure of 160kpa. for air, r-287 j/ kg k. and hair al viscosity of air at a temperature of 50°c and an absolute (10 points) (b) find the dynamic viscosity of air at 110 °c. sutherland constant for air is 111k

A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.