Problem 3 Refrigerant-134a enters a diffuser steadily as saturated vapor 500 kPa with a velocity of 170 m/s, and it leaves at 600 kPa and 50°C. the refrigerant is gaining heat at a rate of 2.5 kJ/s as it passes through the diffuser. If the exit area is 75 percent greater than the inlet area, determine (a) the exit velocity and (b) the mass flow rate of the refrigerant.

For Ke = 0.577 in. H2O-min/ft and Ks = 0.00986 in. H2O-min-ft/gr, design a reverse-air baghouse to filter 20,000 cfm of air with 2.5 gr/ft3 of flour. Assume a cleaning time of 3.0 minutes and a filtration time of 60 minutes. In your design, specify the number of compartments, the maximum filtering velocity, the cloth area per compartment, and the total number of bags required if each bag is 10 ft long and 1 ft in diameter. Also, specify the maximum pressure drop that will be experienced during the run.

it of particulate matter left in soluthon during a filtering pro p(n)=400(2)-0.4n, where nis then ps. Find the amounts ef tor n=0 and n=5. le number.

choose the correct answer 18- Water flow (frictionless) through a long horizontal conical diffuser at a rate of 4.2 m3/sec. The diameter of the diffuser change from 1m to 1.6 m. The pressure at the smaller end is 9.5 kpa and weight density for water (9.81 kn/m3). The pressure at the bigger end will be: *       a) (5-15) kpa       b) (15.1- 25) kpa       c) (25.1-30) kpa       d) More than 30 kpa       e)none of all above