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Consider a centrifugal fan connected to a duct system in an HVAC installation. The intended air...
A centrifugal fan has an inlet duct of diameter 0.60m and a rectangular outlet of cross...
A centrifugal fan has an inlet duct of diameter 0.60m and a rectangular outlet of cross section 0.5m by 0.4m. At standard air conditions the static depression at fan inlet is 27mm of water and the static pressure at fan discharge is 15mm of water. The mean velocity pressure or dynamic pressure in the discharge duct is 16mm of water column. The electric motor driving the fan consumes 1.5kW and its efficiency is 78%. Calculate the volume flow of air,...
A medium-size centrifugal air compressor has 32 radial blades and the inlet vanes allow air suction...
A medium-size centrifugal air compressor has 32 radial blades and the inlet vanes allow air suction with no pre. whirl. The rotor speed is 7800 rpm and the tip radius is r2 = 0.25 m. Air is sucked in at a static temperature T1 = 305 K with an absolute velocity V1 = 80 m/s and a mass flow rate of 1.65 kg/s. The total-to total efficiency of the compressor is 80% and the power input factor is w =...
A single V-belt drive system is powered by an electric motor with a speed of 2691 rpm and transmi...
A single V-belt drive system is powered by an electric motor with a speed of 2691 rpm and transmits a power 11 kW. The driving pulley is connected to the driven pulley by a single V-belt of angle 18 degrees and a unit weight of 2.18 N/m. The angle of wraps between the belt and pulley is approximately 175 degrees. The driven shaft is attached to a cylindrical pulley of 101 mm and runs at a speed of 1221 rpm....
if you sure then solve. will be rate Air flows at 0.05 kg/s through n insulated circular duct such that the (gauge)...
if you sure then solve. will be rate
Air flows at 0.05 kg/s through n insulated circular duct such that the (gauge) pressure immediately downstream of a blower is 10 kPa You may neglect the impact of elevation change in your analysis. Part A the air that would be expected between upstream and downstream locations. If the pressure at a downstream location within the duct is measured as 8 kPa, estimate the change the temperature Express your answer to three...
A 480 V, 60 Hz, 4-pole-pair, three-phase, delta-connected induction motor has the following parameters: R1=0.42 Ω,...
A 480 V, 60 Hz, 4-pole-pair, three-phase, delta-connected induction motor has the following parameters: R1=0.42 Ω, R2=0.23 Ω, X1=0.48 Ω, X2=0.29 Ω, Xm=29.71 Ω where: R1 is the stator resistance R2 is the rotor resistance reflected in the stator; X1 is the stator leakage inductance; X2 is the rotor leakage inductance reflected in the stator; Xm is the magnetising inductance; The rotational losses are 2450 W. The motor drives a mechanical load at a speed of...
#1 plz HW24 、049 wish to design a pumping system with an effective head (total dynamic head - TDH is to be 90 gpm....
#1 plz
HW24 、049 wish to design a pumping system with an effective head (total dynamic head - TDH is to be 90 gpm. a. If the system is lossless what is the required input power in Watts? b. If the system has an efficiency of 58% what is the input power in Watts? 2. Recall the system layout at the top of Page 1 in WS24. The input electrical power is 2600 W. The motor is an induction motor...
3. A centrifugal pump performance data are shown in the following table for water. Pump speed...
3. A centrifugal pump performance data are shown in the following table for water. Pump speed 2500 RPM Pe or P2 (bar) P or Pi (bar) Volume of water (L) Time (sec) Input-Power (W -0.3 20 60 100 For this data set, calculate the following: i. Pump discharge capacity Q (L/s and GPM) ii. Pump head H (m and f) iii. Fluid power Pr(Watt) iv. Brake power Pb (Watt) v. Pump overall efficiency η (%) vi. Flow rate coefficient Ca...
Problems - A two constant air-volume system with duct reheater similar to the one shown in...
Problems - A two constant air-volume system with duct reheater similar to the one shown in the Figure is to be designed for Jeddah summer outdoor design conditions of Ta = 40°C & Txt = 24°C. Fifteen percent (15%) of the supply-air mass flow rate to each one is to be fresh air (outside air). The cooling coil for the system is to be selected such that the air will exit the coil at Td = 3°C & ° =...
5. A 208-V four-pole 60-Hz Y-connected wound-rotor induction motor is rated at 30 hp. Its equivalent...
5. A 208-V four-pole 60-Hz Y-connected wound-rotor induction motor is rated at 30 hp. Its equivalent circuit components are R=0.100 Ry=0.070. X - 10.00 R = 250 X; -0.2100 X=0.21002 Praw=500 W P =0.5% of input at full load For a slip of 0.05, find (a) The line current (b) The induced voltage in the rotor (c) The stator power factor (d) The rotor power factor (e) The rotor frequency (f) The stator copper losses (g) The core loss (h)...
find v belt drive design power select belt type determine shive size (belt speed 4000 ft/min)...
find v belt drive
design power
select belt type
determine shive size (belt speed 4000 ft/min)
find shive size from power rating figure
find rated power
find estimated centre distance
find belt length (by selecting standard belt length)
calculate actual centre distance
find contact angle for small shieve
determine correct factors
calculate correct power per belt
no. of belt needed
V-Belt Designing Sample Problem . Given: A 4 cylinder diesel engine runs at 80 hp, 1800 rpm, to drive a...
A medium-size centrifugal air compressor has 32 radial blades and the inlet vanes allow air suction with no pre. whirl. The rotor speed is 7800 rpm and the tip radius is r2 = 0.25 m. Air is sucked in at a static temperature T1 = 305 K with an absolute velocity V1 = 80 m/s and a mass flow rate of 1.65 kg/s. The total-to total efficiency of the compressor is 80% and the power input factor is w =...
if you sure then solve. will be rate
Air flows at 0.05 kg/s through n insulated circular duct such that the (gauge) pressure immediately downstream of a blower is 10 kPa You may neglect the impact of elevation change in your analysis. Part A the air that would be expected between upstream and downstream locations. If the pressure at a downstream location within the duct is measured as 8 kPa, estimate the change the temperature Express your answer to three...
#1 plz
HW24 、049 wish to design a pumping system with an effective head (total dynamic head - TDH is to be 90 gpm. a. If the system is lossless what is the required input power in Watts? b. If the system has an efficiency of 58% what is the input power in Watts? 2. Recall the system layout at the top of Page 1 in WS24. The input electrical power is 2600 W. The motor is an induction motor...
3. A centrifugal pump performance data are shown in the following table for water. Pump speed 2500 RPM Pe or P2 (bar) P or Pi (bar) Volume of water (L) Time (sec) Input-Power (W -0.3 20 60 100 For this data set, calculate the following: i. Pump discharge capacity Q (L/s and GPM) ii. Pump head H (m and f) iii. Fluid power Pr(Watt) iv. Brake power Pb (Watt) v. Pump overall efficiency η (%) vi. Flow rate coefficient Ca...
Problems - A two constant air-volume system with duct reheater similar to the one shown in the Figure is to be designed for Jeddah summer outdoor design conditions of Ta = 40°C & Txt = 24°C. Fifteen percent (15%) of the supply-air mass flow rate to each one is to be fresh air (outside air). The cooling coil for the system is to be selected such that the air will exit the coil at Td = 3°C & ° =...
5. A 208-V four-pole 60-Hz Y-connected wound-rotor induction motor is rated at 30 hp. Its equivalent circuit components are R=0.100 Ry=0.070. X - 10.00 R = 250 X; -0.2100 X=0.21002 Praw=500 W P =0.5% of input at full load For a slip of 0.05, find (a) The line current (b) The induced voltage in the rotor (c) The stator power factor (d) The rotor power factor (e) The rotor frequency (f) The stator copper losses (g) The core loss (h)...
find v belt drive
design power
select belt type
determine shive size (belt speed 4000 ft/min)
find shive size from power rating figure
find rated power
find estimated centre distance
find belt length (by selecting standard belt length)
calculate actual centre distance
find contact angle for small shieve
determine correct factors
calculate correct power per belt
no. of belt needed
V-Belt Designing Sample Problem . Given: A 4 cylinder diesel engine runs at 80 hp, 1800 rpm, to drive a...
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