The mass-flow-rate must not be the same for the worst and best operating condition according to continuity concept. O True O False
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- a. What is the Static efficiency of the fan if the air flow rate is equal to 3.8 5m /sec, total head of 68.72 m, velocity head of 30.86 m, mechanical efficiency and power are 39.12% and 35.72 KW at 30.69°C, respectively. b. Solve for the area at entrance of the fan blade, if the it has a 346mm diameter, flow of air is equal to 23.328 m/se and flow rate of 3.05 m³ /second.A pump draws water from an 8 in. suction pipe and discharges through a 6 in. pipe in which the velocity is 12 fps. The pressure is –5 psi at point 1 in the suction. The 6 in. pipe discharges horizontally into the air. The power delivered to the pump is 30hp whose efficiency is 70. Determine: a. the water horsepower 21 18 15 b. the total dynamic head in feet 94.316 78.564 67.369 c. To what height h in feet above the suction gage can the water be raised? 81.716 65.498 54.303 please answer immediately thankyouThe temperatures of the 20 ºC 25 ºC 30 ºC water at outlet Task 1 Explain the system parameters using the Non- Flow Energy Equation
- Equation 6.16: εT = ln(li / l0)1. For a given pump, the diameter, the gauge pressures at the inlet and outlet are −30 × 103 P a and 200 × 103 P a, respectively. If the flow rate is 0.1 m3/s, and the power required is 25 kW, find the efficiency. The intake and discharge are at the same height. 2. The impeller of a radial-flow turbine has an outer radius of 4 f t, turning at 200 rpm. The volume flow rate is 1000 ft3/s, and it discharges in the axial direction. Neglect all losses. If the tangential component of the velocity at the inlet is 5 f t/s, find: (a) The torque exerted on the impeller. (b) The power developed by the machine.Consider an inward flow reaction turbine in which velocity of flow at inlet is 3.8m/s. The 1m diameter wheel rotates at 240rpm and absolute velocity makes an angle of 16° with wheel tangent. Determine (1) velocity of whirl at inlet, (2) absolute velocity of water at inlet, (3) vane angle at inlet, and (4) relative velocity of water at entrance. Show the schematic diagram and complete solution with units.
- A francis turbine is having a inlet diameter of 2.0 m and an outlet diameter of 1.2 m. Thebreath of the blade is constant as 0.2 m. The runner rotates at a speed of 250 rpm with adischarge of 8 m3/sec. The vanes are radial at the inlet and the discharge is radially outwards atthe outlet. Calculate the angle of guide vane at the inlet and blade angle at the outlet.a. Given the static head of 28.91 m, and static pressure head of 3.15 cm WC. What is the normal pressure, Pn? b. What is the Static efficiency of the fan if the air flow rate is equal to 3.8 5m /sec, total head of 68.72 m, velocity head of 30.86 m, mechanical efficiency and power are 39.12% and 35.72 KW at 30.69°C, respectively. c. Solve for the area at entrance of the fan blade, if the it has a 346mm diameter, flow of air is equal to 23.328 m/se and flow rate of 3.05 m³ /second.A Thomas meter is located in an air duct of 2 sq ft cross-sectional area. The air weighs 0.083 lb per cu ft, and its specific heat is 0.24. Assume a controlled temperature differential of 5° and heater potential of 110 volts. Plot the velocity as abscissa and amperage as ordinate for veloc- ity 0 to 300 ft per min. Assume constant amperage of 3, and plot tem- perature difference against velocity. Discuss the curves from the stand- point of accuracy of the system.
- Solve the ff. The discharge pressure of an air compressor is 5 times the suction pressure. If the volume flow at suction is 0.7m3/s and discharge volume flow of 0.2217m3/s, what is the compressor power(hp) if suction pressure is 100kpa. Ans. 191.72 A double acting air compressor has a cylinder dimension of 50cm x 60cm, 750rpm will have a volume displacement (m3/s) of: Ans. 2.945 A pump has a specific speed of 45 and 600rpm when it delivers 0.01m3/s. Find the head developed by the pump in ft. Ans. 926.07A compressor piston has a stroke of 380 mm and the clearance volume of 7% of thestroke volume. At the beginning of compression stroke the pressure of air is 0.99 barWhen the piston has travelled 260 m from the begining of the compression stroke thedelivery valves open and delivers air at 4 bar. Find the value of "n", iif the compressionfollows the law PVn = CA. 1.37B. 1.39C. 1.28D. 126For the purpose of acting as an air-cooled water chiller, an ammonia refrigerant vapor compression system is deployed. It is functioning with an evaporator temperature of 0 degrees Celsius and a condenser temperature of 40 degrees Celsius. The refrigeration produced by the system is equal to 15 tons.Find out: a. The temperature of the discharge and the mass flow rate of the refrigerant that is being circulated.b. The piston displacement that can be considered theoretical for the compressor.c. The work that can be done by the theoretical compressor.d. The heat that is not allowed to escape through the condenser.e. The Carnot coefficient of performance and the actual COP of the cycle.f. The volume of air that is supplied in the condenser if the air comes in at 30 degrees Celsius and exits at 34 degrees Celsius.g. The LMTD and AMTD of the condenser h. The water flow rate of the chiller assuming that the water enters the evaporator at 10 degrees Celsius and exits at 5 degrees Celsiusi. The…