AIR ENTER A 5-M-LONG SECTION OF A RECTANGULAR DUCT OF CROSS SECTION 12*18 CM MADE OF...
AIR ENTER A 5-M-LONG SECTION OF A RECTANGULAR DUCT OF CROSS SECTION 12*18 CM MADE OF COMMERCIAL STEEL AT 1 ATM AND 35ºc AT AN AVERAGE VEL OF 6M/S. DISGREGARDING THE ENTRANCE EFFECTS, DETERMINE THE FAN POWER NEEDED TO OVERCOME THE PRESSURE LOSSES IN THIS SECTION OF THE DUCT.
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AIR ENTER A 5-M-LONG SECTION OF A RECTANGULAR DUCT OF CROSS
SECTION 12*18 CM MADE OF...
Air enters a 10-m-long section of a rectangular duct of cross section 15 cm X 20 cm made of commercial steel at an average velocity of 7 m/s
Air enters a 10-m-long section of a rectangular duct of cross section 15 cm X 20 cm made of commercial steel at an average velocity of 7 m/s.(p = 1.145kg/m3 ,μ = 1.895x10-5kg/ms) and e=0.000045 m). For this pipe determine (a)the Reynolds number and decide weather the flow is laminar or turbulent (b) the head loss, (c) the pressure drop, and (d) the pumping power requirement to overcome this pressure drop.
3) A rectangular HVAC duct of cross-section 20 cm X 20 cm and 12 m long...
3) A rectangular HVAC duct of cross-section 20 cm X 20 cm and 12 m long is made of 3.5 mm thick sheet metal that is used to deliver hot air at 60°C with an average velocity of 4 m/s. The thermal resistance of the duct is negligible, and the outer surface of the duct, whose emissivity is 0.305, is exposed to the cold air at 10 C in the room, with a convection heat transfer coefficient of 10 W/m²....
16. (10p) Air in a heating system is distributed through a rectangular duct (0.2m x 0.3...
16. (10p) Air in a heating system is distributed through a rectangular duct (0.2m x 0.3 m) made of commercial steel (average roughness height = 0.000045 m) at a rate of 0.5 m/s. Calculate the pressure drop and head loss in the 40 m length part of this duct and the needed pumping power to overcome the losses. Pair 1.169 kg/m3, Hair = 1.918x10-5kg/ms
2. Air at 35 C is ducted from from a furnace to a room via a rectangular duct that has a cros sec...
2. Air at 35 C is ducted from from a furnace to a room via a rectangular duct that has a cros section of 25 (em) x 35 (em] that is 15 (m long. If the average velocity is 6 (m/s), determine the power required by the blower to overcome the pressure drop
2. Air at 35 C is ducted from from a furnace to a room via a rectangular duct that has a cros section of 25 (em) x...
Q2 A main trunk duct of air-conditioning system shown in Figure 2 is rectangular in cross-section...
Q2 A main trunk duct of air-conditioning system shown in Figure 2 is rectangular in cross-section (40 cm x 80 cm). Air at atmospheric pressure and temperature of 20c flows inside the duct with velocity of 7 m/s. The cross sectional srea snd definition of characteristic length for the duct are given in Figure 2. The duct is assumed to be m long. The flow inside the duct is assumed fully developed. (a)Find properties of air using suitable value of...
A long rectangular copper bar of a cross section of 2cm by 3cm and a long...
A long rectangular copper bar of a cross section of 2cm by 3cm and a long cylindrical copper rod of 2.2 cm in diameter are initially at a uniform temperature of 120 °C. They are then exposed to a cooling air stream at 22 °C with a heat transfer coefficient of 180 W/m-K. Taking the properties of the copper to be k = 400 W/m-K and p-8930 kg/m', and C -0.385 kJ/kg-K, determine: a How long would it take for...
An aluminum bar 3.90 m long has a rectangular cross section 1.26 cm by 5.35 cm...
An aluminum bar 3.90 m long has a rectangular cross section 1.26 cm by 5.35 cm . Part A) What is its resistance? I got R= 1.52*10^-4 Ω Part B) What is the length of a copper wire 1.45 mm in diameter having the same resistance? L= ? m
Air enters a 23-cm-diameter 13-m-long underwater duct at 53°C and 1 atm at a mean velocity...
Air enters a 23-cm-diameter 13-m-long underwater duct at 53°C and 1 atm at a mean velocity of 7 m/s, and is cooled by the water outside. If the average heat transfer coefficient is 85 W/m2 °C and the tube temperature is nearly equal to the water temperature of 5°C, determine the exit temperature of air and the rate of heat transfer. Use Table A-15 for the properties of air at the anticipated average temperature of 30°C. Answer in Watts. please...
An aluminum bar 3.68 m long has a rectangular cross section 1.01 cm by 5.17 cm...
An aluminum bar 3.68 m long has a rectangular cross section 1.01 cm by 5.17 cm . a. What is it's resistance? (I got 1.987x10^-4 but the program says this is wrong) b. What is the length of a copper wire 1.50 mm in diameter having the same resistance? (I got 0.02041 but it also was wrong) A 14.0 gauge copper wire of diameter 1.628 mm carries a current of 11.0 mA. What is the potential difference across a 2.25...
The T-section beam (single symmetry) represented in Figure 3 has cross sectional dimensions a-12 cm, b 1 5 cm. t# 3 cm, and is made of AISI 1018 steel.' Calculate: a. the yielding moment Mv 19 Ma...
The T-section beam (single symmetry) represented in Figure 3 has cross sectional dimensions a-12 cm, b 1 5 cm. t# 3 cm, and is made of AISI 1018 steel.' Calculate: a. the yielding moment Mv 19 Marks b. the plastic moment Mp; 8 Marks] c. the shape factor f 3 Marks]
The T-section beam (single symmetry) represented in Figure 3 has cross sectional dimensions a-12 cm, b 1 5 cm. t# 3 cm, and is made of AISI 1018 steel.'...
3) A rectangular HVAC duct of cross-section 20 cm X 20 cm and 12 m long is made of 3.5 mm thick sheet metal that is used to deliver hot air at 60°C with an average velocity of 4 m/s. The thermal resistance of the duct is negligible, and the outer surface of the duct, whose emissivity is 0.305, is exposed to the cold air at 10 C in the room, with a convection heat transfer coefficient of 10 W/m²....
16. (10p) Air in a heating system is distributed through a rectangular duct (0.2m x 0.3 m) made of commercial steel (average roughness height = 0.000045 m) at a rate of 0.5 m/s. Calculate the pressure drop and head loss in the 40 m length part of this duct and the needed pumping power to overcome the losses. Pair 1.169 kg/m3, Hair = 1.918x10-5kg/ms
2. Air at 35 C is ducted from from a furnace to a room via a rectangular duct that has a cros section of 25 (em) x 35 (em] that is 15 (m long. If the average velocity is 6 (m/s), determine the power required by the blower to overcome the pressure drop
2. Air at 35 C is ducted from from a furnace to a room via a rectangular duct that has a cros section of 25 (em) x...
Q2 A main trunk duct of air-conditioning system shown in Figure 2 is rectangular in cross-section (40 cm x 80 cm). Air at atmospheric pressure and temperature of 20c flows inside the duct with velocity of 7 m/s. The cross sectional srea snd definition of characteristic length for the duct are given in Figure 2. The duct is assumed to be m long. The flow inside the duct is assumed fully developed. (a)Find properties of air using suitable value of...
A long rectangular copper bar of a cross section of 2cm by 3cm and a long cylindrical copper rod of 2.2 cm in diameter are initially at a uniform temperature of 120 °C. They are then exposed to a cooling air stream at 22 °C with a heat transfer coefficient of 180 W/m-K. Taking the properties of the copper to be k = 400 W/m-K and p-8930 kg/m', and C -0.385 kJ/kg-K, determine: a How long would it take for...
The T-section beam (single symmetry) represented in Figure 3 has cross sectional dimensions a-12 cm, b 1 5 cm. t# 3 cm, and is made of AISI 1018 steel.' Calculate: a. the yielding moment Mv 19 Marks b. the plastic moment Mp; 8 Marks] c. the shape factor f 3 Marks]
The T-section beam (single symmetry) represented in Figure 3 has cross sectional dimensions a-12 cm, b 1 5 cm. t# 3 cm, and is made of AISI 1018 steel.'...
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