FANS AND BLOWERS

11問 • 1年前

問題一覧

A fan whose statics effenciency is 40% has a capacity of 60000 ft³/hr at 60°F and a barometer of 30 inHG and gives a static pressure of 2 in water column of full delivery. What size of electric motor should be used to drive the fan.

B. 1HP

A fan draws 1.42 m² per second of air at a static pressure of 2.54 cm of water through a duct 300 mm diameter and sacharges it through a duct of 275 mm diameter Determine the static farneficency of mechanicals 70% and ar a measured at 25°C and 760 mmHG

A. 50 11%

Find the air horsepower of an industrial fan that delivers 25 m³/s of air through a 900 mm by 1200 mm outlet Stic is 127 mm of water gage and air density is 1.18 kg/m³.

B. 52.35 Hp

A boiler requires 90,000 m³/hr of standard air. The mechanical efficiency of fan to be installed is 65%. Determine driving motor assuming fan can deliver a total pressure of 150 mm of water gage.

A. 56.6 KW

50 KW motor is used to drive a fan that has a total of 10 fancy a 70%, what a the iו of the fan using standard density of ar?

A. 27 m³/sec

A fan using standard air condition can developed a static pressure head of 310 mm water gage if tan wh and 735 mm of Hg. find the new static pressure required.

C. 241 mm water gage

The total Blowers fan is 185 m and has a static pressure of 210 mm of water gage, what is the velocity of air flowin of air is 1.15 kg/m³?

C. 4.76 m/sec

A fan delivers 4.7 m³/sec at a static pressure of 5.08 cm of water when operating at a speed of 400 rpm. The power input required is 2.963 KW. If 7.05 m³/sec are desired in the same fan and installation, find the pressure in cm of water.

C. 11.43

Ar enters a fan through a duct at a velocity of 6.3m/s and an inlet static pressure of 2.5 cm of water less than atmospheric pressure. The air leaves the fan through a duct at a velocity of 11.25 m/s and a discharge static pressure of 7.62 cm of water tan efficiency when to fan is 13.75 KW at the power input to thepecific 1.20 kg/m³ the coupling ?

A. 71.81%

Fans & Blowers 15 (MF Belocity of 7.62 m/s and static pressure of 2. 16 cm water gauge. duct diameter is 1.22 baroseneng in a duc 99.4 Kpa and the gage fluid temperature and air temperature are 30°C. What is the total pr against which the fan will operate in cm of water?

B. 2.5

A fan described in a manufacturer's table is rated to deliver 500 m³/min at a static pressure (gage) of 254 cm of water when ruuning at 250 rpm and requiring 3.6 KW. If the fan speed is changed to 305 rpm and and air handled at 65°C instead standard at 21°C,find the power in KW

D. 5.66

THERMO

James Paul Concepcion · 31問 · 1年前

THERMO