An atmospheric pressure of 100 kPa exists inside a room. Air is exhausted through a 0.5 m diamter pipe into the atmosphere. the capacity of the fan is 2000 m³/h, consuming a power of 1100 W at a speed of 1000 rpm. There is a 60pa pressure drop in the suction while 0.80 kPa at the discharge side.Calculate the fan capacity if the operating speed is changed to 1200 rpm with respective change in power. Select the correct response: 0.667 m³/s 0.891 m³/s 0.927 m³/s 0..577 m³/s

An atmospheric pressure of 100 kPa exists inside a room. Air is exhausted through a 0.5 m diamter pipe into the atmosphere. the capacity of the fan is 2000 m³/h, consuming a power of 1100 W at a speed of 1000 rpm. There is a 60pa pressure drop in the suction while 0.80 kPa at the discharge side.Calculate the fan capacity if the operating speed is changed to 1200 rpm with respective change in power. Select the correct response: 0.667 m³/s 0.891 m³/s 0.927 m³/s 0..577 m³/s

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

A fan is used to extract 140m3 air per minute from a large room. A circular duct of diameter 0.53 m connects the fan to the room, and the air is exhausted from the fan into the atmosphere through a conical diffuser that increases in diameter from 0.53 m to 0.8 m. A manometer shows that the pressure in the room is sub-atmospheric and the water height differential across the manometer is 6 mm. Neglecting losses, calculate:a. The static and stagnation pressures upstream of the fanb. The static and stagnation pressures downstream of the fanc. The power supplied by the fan to the air[Hint: define the following stations: 1. The room, 2. Immediately upstream of fan, 3. Immediately downstream of fan, 4. The atmosphere]
Air enters through a duct of a fan with a velocity of 4m/s and an inlet pressure of2cm of water less than atmospheric pressure. The air leaves the fan through aduct at a velocity of 12m/s and a discharge static pressure of 8cm of waterabove atmospheric pressure. If the specific weight of air is 1.2kg/m3 and the fandelivers1 2m3/s, what is the fan input power to the motor if the fan has amechanical efficiency of 70% and motor efficiency of 80%.
A backward-swept centrifugal fan develops a pressure of 80 mm of water gauge. It has an impeller diameter of 0.89 m and runs at 720 rpm. The blade angle at the tip is 39° and the width of the impeller is 0.1m. Assuming a constant radial velocity of 9.15 m/s and density of air as 1.2 kg/ m3 , determine the fan efficiency, discharge and power required.
At atmospheric pressure of 100 kpa exists inside a room. Air is exhausted through a 0.5m diameter pipe into the atmosphere. The capacity of the fan is 2000m³/h, consuming a power of 1100 W at a speed of 1000rpm. There is a 60pa pressure drop in the suction while 0.80 kpa at the discharge side. Calculate the fan capacity if the operating speed is changed to 1200rpm with respective chance in power
A turbine is located at an elevation 200 m below that of the surface of the water intake. The friction loss in the pipeline leading to it is 8 m and the turbine efficiency is 90%. What is the power input delivered by the water to the turbine if the flow is 3.0 m^3/s in kW?
Please show your complete solution. Thank you! Air flows in a steady flow manner through a converging tube. At the inlet the pressure is 690kPaabs and the density is 0.838 kg/cu.m. If air enters with a volume flow of 125 cu.m per min at the rate of 94 m/min and the exit section has a diameter of 350mm, determine a.) the mass flow rate, kg/min b.) the diameter of the entrance section and c.) the exit velocity. Assume that the density is constant.
A fan draws 1.42 m3 per second of air at a static pressure of 2.54 cm of water through a duct 300 mm diameter and discharges it through a duct of 275 mm diameter. Determine the static fan efficiency if total fan mechanical is 70% and air is measured at 25 0C and 760 mmHg. Using p water formulaPw=
A booster pump on a brake system designed to be usedhorizontally consists of two cylinders capped by pistonsconnected by a hose. The cylinders and hose are filled withan incompressible fluid. The system produces a mechanicaladvantage of five times; that is, the output force is five timesas great as the input force. If the cross-sectional area of theinput piston is 4.0 in.2, how large must the area of the outputpiston be?
steam turbine receives a steam flow of 1.35 kg/s and the power output is 500 kW. The heat loss from the casing is negligible. If the velocity at entrance is 60 m/s,the velocity at exit is 360 m/s, and the inlet pipe is 3 m above the exhaust pipe, calculate the change of specific enthalpy across the turbine.
The properties of the air in the inlet section with A1 = 0.2562 m2 in a converging-diverging channel are given as U1 = 256,2 m/s, T1 = 362 K, P1 = 136,2 kPa (absolute). Find the required cross-sectional area, pressure, temperature, velocity and mass flow rate to obtain sonic (Ma2=1.0) flow at the outlet. Calculate critical values of A*, U*, T*, P*. Solve the problem by making the necessary assumptions and drawing the schematic figure.
1. A turbine is fed from a mountain reservoir 300 metres above it. Calculate the drop in massspecific energy (neglecting kinetic energy) between the reservoir and the turbine, andcalculate the volumetric flow rate required for 10MW of power to be extracted.
A pump recieves 8kgs of water at 220 kPa and 110℃ and discharges it at 1100 kpa. Compute the power required in kW.