![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] th](http://img.homeworklib.com/images/592fe82b-c0e5-4c33-b612-a97443cbd3f1.png?x-oss-process=image/resize,w_560)
Homework Answers
thank
yoyAdd Answer to:
2. Air at 35 C is ducted from from a furnace to a room via a rectangular duct that has a cros sec...
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.
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.
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
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....
A rectangular forced air heating duct is suspended from the ceiling of a basement whose air...
A rectangular forced air heating duct is suspended from the ceiling of a basement whose air and walls are at a temperature of ∞T∞=Tsur= 5°C. The duct is 15 m long, and its cross section is 350 mm × 188 mm. (1) For an uninsulated duct whose average surface temperature is 50°C, estimate the rate of heat loss from the duct. The surface emissivity and convection coefficient are approximately 0.5 and 4 W/m2·K, respectively. (2) If heated air enters the...
2. (20%) Air at the 25 °C with a mass flow rate of m- 0.01 kg/sec...
2. (20%) Air at the 25 °C with a mass flow rate of m- 0.01 kg/sec enters a rectangular duct 0 6 em cross section and 2 m long. The duct wall is subjected to a uniform heat flux of qKw temperature of the air and the duct surface temperature at the duct outlet (A hydrod1.568 x 103 mls,Pr developed flow). Air properties to be used are:ρ-1.1774 kgm, C,-1.0057 0.708, k -0.02624 w/m-oC. 5 kw/m2. Determine the oulet ically and...
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...
Prob#1 mainstream A 0.5-m-square duct contains air flowing from Um = 1.5 m/s entering the duct...
Prob#1 mainstream A 0.5-m-square duct contains air flowing from Um = 1.5 m/s entering the duct at 1 atm and 25 C, as shown in Figure below. Applying the appropriate boundary layer concept, calculate the (a) The average velocity at 2 m in the duct. (b) Pressure drop along the duct, in Pa/m unit. 0.5-m-square duct Boundary layers U mainstream U -2 m
2) (35 pt) Atmospheric air at 25 Centers a duct having a cross section of an...
2) (35 pt) Atmospheric air at 25 Centers a duct having a cross section of an equilateral triangle 2 cm on a side with a velocity of 1.5 m/s. The length of the duct is 10 m. A constant heat flux is imposed on the duct wall. The mean temperature of the air at the duct exit is 75 °C. a. Is the flow at the duct exit hydrodynamically and thermally fully developed? Show. T-75 °C b. Calculate the convection...
3) Water at 15°C (p- 999.7 kg/m3 and u 1.307 x 10-3 kg/m-s) is flowing steadily...
3) Water at 15°C (p- 999.7 kg/m3 and u 1.307 x 10-3 kg/m-s) is flowing steadily in a 0.25-cm diameter, 35-m-long pipe at an average velocity of 1.2 m/s. Determine (a) the pressure drop, (b) the head loss, and (c) the pumping power requirement to overcome this pressure drop.
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
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....
2. (20%) Air at the 25 °C with a mass flow rate of m- 0.01 kg/sec enters a rectangular duct 0 6 em cross section and 2 m long. The duct wall is subjected to a uniform heat flux of qKw temperature of the air and the duct surface temperature at the duct outlet (A hydrod1.568 x 103 mls,Pr developed flow). Air properties to be used are:ρ-1.1774 kgm, C,-1.0057 0.708, k -0.02624 w/m-oC. 5 kw/m2. Determine the oulet ically and...
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...
Prob#1 mainstream A 0.5-m-square duct contains air flowing from Um = 1.5 m/s entering the duct at 1 atm and 25 C, as shown in Figure below. Applying the appropriate boundary layer concept, calculate the (a) The average velocity at 2 m in the duct. (b) Pressure drop along the duct, in Pa/m unit. 0.5-m-square duct Boundary layers U mainstream U -2 m
2) (35 pt) Atmospheric air at 25 Centers a duct having a cross section of an equilateral triangle 2 cm on a side with a velocity of 1.5 m/s. The length of the duct is 10 m. A constant heat flux is imposed on the duct wall. The mean temperature of the air at the duct exit is 75 °C. a. Is the flow at the duct exit hydrodynamically and thermally fully developed? Show. T-75 °C b. Calculate the convection...
3) Water at 15°C (p- 999.7 kg/m3 and u 1.307 x 10-3 kg/m-s) is flowing steadily in a 0.25-cm diameter, 35-m-long pipe at an average velocity of 1.2 m/s. Determine (a) the pressure drop, (b) the head loss, and (c) the pumping power requirement to overcome this pressure drop.
Most questions answered within 3 hours.
-
1. What is the meaning of the term communication style?
2. What are the benefits to...
asked 4 minutes ago -
9.) You are buying a car that cost $26,500. You make payments of
$412 each month...
asked 29 minutes ago -
. Suppose a discrete random variable has probability
distribution
P(x) = .2 if x = 0...
asked 1 hour ago -
Problem #1
The area between Z = 0 and Z = 2.50
The area between Z...
asked 46 minutes ago -
Under the influence of its drive force, a snowmobile is moving
at a constant velocity along...
asked 2 hours ago -
Why do organizations decline? What steps can top
management take to halt, decline, and restore organizational...
asked 2 hours ago -
What mechanisms Drive speciation??
(I.e. what was Dawins theory on the orgin of species, and how...
asked 3 hours ago -
The manager at a car assembly plant believes that the mean
assembly time for a car...
asked 4 hours ago -
Which of the following is true of electron capture?
A) It decreases the nuclide's mass number...
asked 6 hours ago -
Assuming an efficiency of 43.10%, calculate the actual yield of
magnesium nitrate formed from 114.9 g...
asked 6 hours ago -
The highly pathogenic bacterium Clostridium
perfringens causes gangrene, a disease that results in the
destruction of...
asked 8 hours ago -
In the context of situation analysis, which of the following is
a category for analysis in...
asked 8 hours ago