Assignment • Individual assignment. • Calculate the pressure loss of air in a flat oval duct...
Assignment • Individual assignment. • Calculate the pressure loss of air in a flat oval duct with a = 16 in and b = 28 in for a volume flow rate of 3000 cfm.
total flow and duct pressure required. QUESTION #47: Refer to the following diagram. The pressure drop along each branch (in. wg.) of ductwork and the required air flow (cfm) for each room is listed in the diagram below. Assume all ductwork is of the same dimensions. The minimum required airflow and pressure requirement of the following air handling unit is most nearly? 0.1 0.2 500 CFM 1500 CFM 500 CFM AHU A. 2500, 0.2 B. 2500, 0.4 C. 500, 0.1...
What is the volumetric flow rate for a 15” duct with a velocity pressure of 22” H2O? 1940 cfm 5249 fpm 4305 cfm 5428 cfm What is the capture velocity at a point that is located 18 inches away from, and directly in front of, the opening of a rectangular flanged hood with dimensions of 2 inches wide by 12 inches long when the air flow servicing the hood is 585 cfm. 34 fpm 145 fpm 150 fpm 160 fpm...
3. Air enters a constant area duct at a Mach number of 0.14, a pressure of 195 kPa, and a temperature of 25 °C. Heat is added to the air that flows through the duct at a rate of 65 kJ/kg of air. Assuming that the flow is steady and that the effects of wall friction can be ignored, find the temperature, pressure, and Mach number at which the air leaves the duct. Assume that the air behaves as a...
Assume that the flow of air through a given duct is isentropic. At one point in the duct, the pressure and temperature are p1=100 bar and T1=320 K, respectively. At a second point, the temperature is 290 K. Calculate the pressure and specific volume at this point.
pressure loss calculation QUESTION #47 Refer to the following diagram. The pressure drop along each branch (in. wg,) of ductwork and the required air flow (cfm) for each room is listed in the diagram below. Assume all ductwork is of the same dimensions. The minimum required airflow and pressure requirement of the following air handling unit is most nearly? 0.1 0.1 0.2 500 CFM 1500 CFM 500 CFM AHU
6 1 Determine the equivalent diameter Deg of a rectanqular duct 1000 x 600 mm and calculate the actual velocity in the duct f the volume flow rate of air through the duct is 4 8 m2/s (3) 62 Calculate the equivalent diameter, Deg ! (3) 63 Determine the pressure drop per metre from the velocity and equivalent diameter calculated in 6 1 (3) 64 Show on the flow rate vs friction loss chart that by entering the chart directly...
Problem #3 (15 points) The flow rate of air at standard conditions in a rectangular duct is to be determined by installing pressure taps across a bend. The duct is 0.3 m deep and 0.1 m wide. The inner radius of the bend is 0.25 m. If the measured pressure difference between the taps is 40 mm of water, calculate the flow rate of air Duct Flow Bend R 0.25 0.3 m 0.1 Plan view of bend
Air flows through a constant area duct. The pressure and temperature of the air at the inlet to the duct are P1 = 100 kPa absolute, and T1 = 298 K, respectively. Inlet Mach number is M1 = 0.1. Heat is transferred to the air as it flows through the duct and as a result the Mach number at the exit increases. a) Find the pressure and temperature at the exit, while the exit Mach number changes between M=0.2 to...
A fan draws air from the atmosphere through a 0.3 m diameter round duct that has a smoothly rounded entrance. A differential manometer connected to an opening in the wall of the duct shows a vacuum pressure of 2.5 cm of water. The density of air is 1.22 kg/m3. (a) Determine the volume rate of air flow in the duct in cubic feet per second. (b) What is the power of the fan? Fan 0.30 m 2.5 cm Fan 0.30...