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Problem #3 (15 points) The flow rate of air at standard conditions in a rectangular duct...
1. An air flow rate of 1.5 m/s at standard (15°C) conditions is expected in a...
1. An air flow rate of 1.5 m/s at standard (15°C) conditions is expected in a 0.25 m diameter duct. A flow nozzle is used to measure the rate of flow. The pressure drop is measured to be 300 mm of H20. The diameter of the nozzle is given as 0.14 m. Determine the actual mass flow rate measured by the flow nozzle.
A rectangular forced air heating duct is suspended from the ceiling of a basement whose air...
A rectangular forced air heating duct is suspended from the ceiling of a basement whose air and walls are at a temperature of ∞T∞=Tsur= 5°C. The duct is 15 m long, and its cross section is 350 mm × 188 mm. (1) For an uninsulated duct whose average surface temperature is 50°C, estimate the rate of heat loss from the duct. The surface emissivity and convection coefficient are approximately 0.5 and 4 W/m2·K, respectively. (2) If heated air enters the...
16. (10p) Air in a heating system is distributed through a rectangular duct (0.2m x 0.3...
16. (10p) Air in a heating system is distributed through a rectangular duct (0.2m x 0.3 m) made of commercial steel (average roughness height = 0.000045 m) at a rate of 0.5 m/s. Calculate the pressure drop and head loss in the 40 m length part of this duct and the needed pumping power to overcome the losses. Pair 1.169 kg/m3, Hair = 1.918x10-5kg/ms
What is the volumetric flow rate for a 15” duct with a velocity pressure of 22” H2O? 1940 cfm&n...
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...
Problem 1 (20 points) Air at 35°C, 105 kPa, flows in a 100 mm x 150...
Problem 1 (20 points) Air at 35°C, 105 kPa, flows in a 100 mm x 150 mm rectangular duct in a heating system. The volumet flow rate is 0.015 m'/s. What is the velocity of the air flowing in the duct and what is the mass flow rat Here, air behaves as an ideal gas (p v R T). Gas constant, R of air is 287 J/kg K
Given the following data, calculate the mass flow rate of air exiting a pipe. Pipe diameter...
Given the following data, calculate the mass flow rate of air exiting a pipe. Pipe diameter = 2.47 in. Atmospheric Pressure = 12.38 psia Air Temperature = 61 °F The following total pressure to static pressures differences have been measured. Assume that all measurements were made along a line that passes through the center of the pipe. | Radius (inches) 1.25 1.00 0.75 0.5 0.25 Pressure Difference (psid) 0.012 0.019 0.0204 0.028 0.035 0.039 0.037 0.030 0.021 0.017 0.007 0.25...
10.00 points Air 129 MPa and 334 Kows upward through a 0.084-m-diameter inclined duct at a...
10.00 points Air 129 MPa and 334 Kows upward through a 0.084-m-diameter inclined duct at a rate of 65 USThe duct diameter is then reduced to 0.064 m through a reducer. The pressure change across the reduceris measured by a water manometer. Determine the differential height between the fluid levels of the two arms of the manometer in centimeters The oferential height between the fuld levels of the two arms Hints esc 80 888
Problem #4 (30 Points) Air at 110 kPa and 323°K flows upward through a 0.06m diameter...
Problem #4 (30 Points) Air at 110 kPa and 323°K flows upward through a 0.06m diameter inclined duct at a volume flow rate of 0.045 m3/s. The duct diameter is then reduced to 0.04m through a reducer. The pressure change across the reducer is measured by a water monometer (Density 1000 kg/m3) The elevation difference between the two points on the center of the pipe where the two arms of the monometer are attached is 0.2m. (1) Determine the density...
Air flows in a 0.50 m diameter pipe at a rate of 15 m/s as shown in Figure 6 Q4 (a) The pipe diameter changes to 1....
Air flows in a 0.50 m diameter pipe at a rate of 15 m/s as shown in Figure 6 Q4 (a) The pipe diameter changes to 1.0 m through a sudden expansion K, Note: For sudden expansion: Assess the pressure rise across this expansion. i. (9 marks) Explain how there can be a pressure rise across the expansion when i there is an energy loss (K, # 0) (2 marks) D2-1.0m Di-0.50 m Q= 15 m/s (1) (2) Figure 6:...
CHE 3315 FLUID MECHANICS PROBLEM SHEET 5: MASS CONSERVATION AND FLOW RATE 1. Determine the mass...
CHE 3315 FLUID MECHANICS PROBLEM SHEET 5: MASS CONSERVATION AND FLOW RATE 1. Determine the mass flow rate of air having a temperature of 20C and gauge pressure 80 kPa as it flows through a circular duct 400 mm in diameter with an average velocity of 3 m/s. The gas specific constant R 286.9 JK /kg 2. Determine the average velocity of the steady flow at one outlet of a T- junction if the inlet flow speed is 6 m/s...
1. An air flow rate of 1.5 m/s at standard (15°C) conditions is expected in a 0.25 m diameter duct. A flow nozzle is used to measure the rate of flow. The pressure drop is measured to be 300 mm of H20. The diameter of the nozzle is given as 0.14 m. Determine the actual mass flow rate measured by the flow nozzle.
16. (10p) Air in a heating system is distributed through a rectangular duct (0.2m x 0.3 m) made of commercial steel (average roughness height = 0.000045 m) at a rate of 0.5 m/s. Calculate the pressure drop and head loss in the 40 m length part of this duct and the needed pumping power to overcome the losses. Pair 1.169 kg/m3, Hair = 1.918x10-5kg/ms
Problem 1 (20 points) Air at 35°C, 105 kPa, flows in a 100 mm x 150 mm rectangular duct in a heating system. The volumet flow rate is 0.015 m'/s. What is the velocity of the air flowing in the duct and what is the mass flow rat Here, air behaves as an ideal gas (p v R T). Gas constant, R of air is 287 J/kg K
Given the following data, calculate the mass flow rate of air exiting a pipe. Pipe diameter = 2.47 in. Atmospheric Pressure = 12.38 psia Air Temperature = 61 °F The following total pressure to static pressures differences have been measured. Assume that all measurements were made along a line that passes through the center of the pipe. | Radius (inches) 1.25 1.00 0.75 0.5 0.25 Pressure Difference (psid) 0.012 0.019 0.0204 0.028 0.035 0.039 0.037 0.030 0.021 0.017 0.007 0.25...
10.00 points Air 129 MPa and 334 Kows upward through a 0.084-m-diameter inclined duct at a rate of 65 USThe duct diameter is then reduced to 0.064 m through a reducer. The pressure change across the reduceris measured by a water manometer. Determine the differential height between the fluid levels of the two arms of the manometer in centimeters The oferential height between the fuld levels of the two arms Hints esc 80 888
Problem #4 (30 Points) Air at 110 kPa and 323°K flows upward through a 0.06m diameter inclined duct at a volume flow rate of 0.045 m3/s. The duct diameter is then reduced to 0.04m through a reducer. The pressure change across the reducer is measured by a water monometer (Density 1000 kg/m3) The elevation difference between the two points on the center of the pipe where the two arms of the monometer are attached is 0.2m. (1) Determine the density...
Air flows in a 0.50 m diameter pipe at a rate of 15 m/s as shown in Figure 6 Q4 (a) The pipe diameter changes to 1.0 m through a sudden expansion K, Note: For sudden expansion: Assess the pressure rise across this expansion. i. (9 marks) Explain how there can be a pressure rise across the expansion when i there is an energy loss (K, # 0) (2 marks) D2-1.0m Di-0.50 m Q= 15 m/s (1) (2) Figure 6:...
CHE 3315 FLUID MECHANICS PROBLEM SHEET 5: MASS CONSERVATION AND FLOW RATE 1. Determine the mass flow rate of air having a temperature of 20C and gauge pressure 80 kPa as it flows through a circular duct 400 mm in diameter with an average velocity of 3 m/s. The gas specific constant R 286.9 JK /kg 2. Determine the average velocity of the steady flow at one outlet of a T- junction if the inlet flow speed is 6 m/s...
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