Specify the dimensions of (a) a square duct and (b) a 4:1 rectangular duct that are flow-equivalent to a circular duct with a diameter Dc = 38 inches.
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Specify the dimensions of (a) a square duct and (b) a 4:1 rectangular duct that are flow-equivalent to a circular duct with a diameter Dc = 38 inches.
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- A tanker carrying tolueneis unloaded to an onshore storage tank using the ship’s pumps. The pipeline is 225-mm inside diameter and 900-m long (200-m long suction line, 700-m long discharged line). Miscellaneous losses due to fittings, valves, etc., amount to 100 equivalent pipe diameters at the suction side, and 500 equivalent pipe diameters at the discharged side. The maximum liquid level in the destination storage tank is 30 m above the lowest liquid level in the ship’s tanks. The ship’s tanks are nitrogen blanketed and maintained at an absolute pressure of 1.05 bar (1 bar = 10^5 Pa). The storage tank has a floating roof, which exerts an absolute pressure of 1.1 bar on the liquid. The ship must unload 1000 metric tons within 5 hours. Taking pump efficiency as 70%, (ρ = 874 kg/m3, μ = 0.62 cP, Pvapor = 0.037 atm absolute). Determine: Discharge head (m) and pressure (Pa) Actual pump power (kW) Available NPSH (m)A tanker carrying tolueneis unloaded to an onshore storage tank using the ship’s pumps. The pipeline is 225-mm inside diameter and 900-m long (200-m long suction line, 700-m long discharged line). Miscellaneous losses due to fittings, valves, etc., amount to 100 equivalent pipe diameters at the suction side, and 500 equivalent pipe diameters at the discharged side. The maximum liquid level in the destination storage tank is 30 m above the lowest liquid level in the ship’s tanks. The ship’s tanks are nitrogen blanketed and maintained at an absolute pressure of 1.05 bar (1 bar = 105 Pa). The storage tank has a floating roof, which exerts an absolute pressure of 1.1 bar on the liquid. The ship must unload 1000 metric tons within 5 hours. Taking pump efficiency as 70%, (ρ = 874 kg/m3, μ = 0.62 cP, Pvapor = 0.037 atm absolute). Determine: A. Pump head (m) B. Pump differential pressure (Pa) C. Suction head (m) and pressure (Pa) D. Discharge head (m) and pressure (Pa) E. Actual pump power…A tanker carrying tolueneis unloaded to an onshore storage tank using the ship’s pumps. The pipeline is 225-mm inside diameter and 900-m long (200-m long suction line, 700-m long discharged line). Miscellaneous losses due to fittings, valves, etc., amount to 100 equivalent pipe diameters at the suction side, and 500 equivalent pipe diameters at the discharged side. The maximum liquid level in the destination storage tank is 30 m above the lowest liquid level in the ship’s tanks. The ship’s tanks are nitrogen blanketed and maintained at an absolute pressure of 1.05 bar (1 bar = 10^5 Pa). The storage tank has a floating roof, which exerts an absolute pressure of 1.1 bar on the liquid. The ship must unload 1000 metric tons within 5 hours. Taking pump efficiency as 70%, (ρ = 874 kg/m3, μ = 0.62 cP, Pvapor = 0.037 atm absolute). Determine: D. Discharge head (m) and pressure (Pa) E. Actual pump power (kW) F. Available NPSH (m)
- The main air (standard air) supply duct carries 200 m^3/min of an air conditioning system with cross section 750mm * 0.5 m. It branches into two ducts: branch A and branch B with cross section for A equal (0.5m*400mm) and for B equal (0.6m*0.5m). The velocity in branch A equal 8m/sec. Calculate: 1- velocity in main duct, 2- velocity in branch B, 3- velocity pressure in main duct, branch A and branch B.A pumping station wet well operates between 540- and 550-ft elevation. The pump curve is deϐined by the following points: 80 ft at zero ϐlow, 78 ft at 200 gpm, 65 ft at 800 gpm, and 50 ft at 1200 gpm. The pump discharge contains an equivalent of 50 ft of 6-in. pipe. The discharge pipe is 120-ft long and terminates at a splitter box, elevation 570. Using C=100, plot the pump curve and the corrected pump curve. Plot the pump discharge curves at each wet well elevation and for C=100 and C=140. What is the pump ϐlow at the low and high wet well elevations for newand old pipe?A 0.30 m X 0.40 m branch duct leaves a 0.30 m X 0.60 m main duct at an angle of 60°. The air temperature is 20°C. The dimensions of the main duct remain constant following branch. The flow rate upstream is 2.7 m3/s. Find the pressure downstream in the main duct if at 20°C, the mass per unit volume is 1.2041 kg/m3. Group of answer choices 436 Pa 634 Pa 643 Pa 346 Paplease show full soluton for review and analysis
- Problem 4: For the siphon in the figure below, calculate (a) the volume flow rate of water through the nozzle and (b) the pressure at points A and B. The distances X = 4.6 m and Y = 0.90 m. 早 Water 50-mm OD X 1.5-mm wall 25-mm diameter 6,838 3141603 FEB 28 rw 吕0 00A centrifugal pump is used to pump a liquid with the properties given below. Liquid is pumped from a storage tank at 95 kPa (a) to a discharge tank at 300 kPa (a). The system configuration is given in the table below. Table 1: system configuration Suction Discharge 4 50 Length (m) Diameter (m) 0.07 0.055 12 90° bends (L/D-35) 5 T piece (L/D=7) Gate valve (L/D-35) 1 1 1 2 Static height (m) 25 Liquid density = 1100 kg.m³ Viscosity = 1.5 x 10-³ Pa.s Vapour pressure of the liquid = 25 kPa (a) Material of construction of pipe is commercial steel, ε = 000045 m Table 2: Pump data 0 10 20 30 40 Flowrate (m³.hr¹) Head (m) 55 56 51 36 6 NPSH (m) 0 2 6 11 19 22 3.1. Graphically determine the optimal operating point of the pump in the above system using the pump data in Table 2. 3.2. Determine the NPSH of the system and determine whether the pump will cavitate when used in the above system.(b) Figure 3 shows a pump with 80% efficiency (no) delivers 50 Liter/s of water at 20°C from tank 1 to tank 2. The pipeline has 150 mm diameter with a length of 200 m made of galvanised steel. Evaluate the input power to an electric motor of 90% (nm) efficiency that connected to the pump. The globe valve used is % wide open. 2 100 m GLOBE VALVE PRESSURE GAUGE МОTOR PUMP
- The pump-turbine system in the Figure draws water from the upper reservoir in the daytime to produce power for a city. At night, it pumps water from lower to upper reservoirs to restore the situation. For a design flow rate of 15,000 gal/min in either direction, the friction head loss is 17 ft. Estimate the power in kW: (a) extracted by the turbine and (b) delivered by the 1- Select coordinates and points 1 and 2 2- Write down your assumptions 3- Apply Energy Eq. and start finding P, V, and z for points 1 and 2 as well as head (h) values 4- Solve for unknown (1) Z₁ = 150 ft pump. Water at 20°C Pump- turbine (2) 2 Z₂ = 25 ft P1 V² + pg 2g P2 V + +Z2+hfriction + hTurbine - hpump [pressure head] 29 +Z1 = pgAn induced draft fan handles 63,500 cfm in of flue gas with a gas constant of 51.5116 ft-lb / lb-R from a boiler at 500 degrees Fahrenheit against a static pressure of 4in. water. The discharge duct diameter is 73.67in. The barometric pressure is 29.9” Hg. Determine the following: a. the total head in ft. of water b. the Air Power in horsepowerA centrifugal pump draws water from a 38cm pipe from an open reservoir in which the water surface is 2.6m below the pump centerline and discharges through a 30cm pipe. At a point in the discharge 2.35m above the pump centerline a pressure gage reads 320 kPa gage. The discharge is 200Liters/sec, the head loss in the suction is 0.15m and in the discharge is 1.05m. Power input to the pump is 140hp. Determine the following: a. The total dynamic head in meters 36.923 41.527 39.188 b. The Water Power (WP) in kW 76.863 80.451 81.451 c. The pump efficiency in percent 77.659 73.596 80.876