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(13) A brewery fermentation tank 12 m in diameter is situated in a room, which has...
a) what is the heat loss per unit length from the pipe in W/m? b) Estimate...
a) what is the heat loss per unit length from the pipe in
W/m?
b) Estimate the heat loss per unit length if a 50 mm thick layer
of insulation with a conductivity of 0.058 W/m K. Neglect radiation
for this part.
3. A 0.20-m diameter, thin-walled steel pipe is used to transport saturated steam at a temperature of 486K in a room for which the air temperature is 25°C and convection heat transfer coefficient at the outer surface of...
Steam at 150 °C flows in a stainless steel pipe which has a thermal conductivity of...
Steam at 150 °C flows in a stainless steel pipe which has a thermal conductivity of 16 W m-1 K -1 whose inner and outer diameters are 5 and 6 cm respectively. The pipe is covered with 3 cm think insulation having a thermal conductivity of 0.035 W m-1 K -1 . The combined convection and radiation heat transfer coefficient at the outside surface of the insulation is 20 W m-2 K -1 and the surroundings are at 10 °C....
HELP MEEE An uninsulated steam pipe passes through a room where the temperatures of the air...
HELP MEEE
An uninsulated steam pipe passes through a room where the temperatures of the air and its walls are 38 degrees. The outer diameter of the pipe is 90 mm, the temperature and spreading rate of its surface are 200 degrees and 0.8, respectively. Calculate the radiating power of the surface and the radiation to the surface. Since the heat transfer coefficient with natural convection from the surface to the air is 25 w/m^2.K, what is the heat loss...
ASSIGNMENT 1 BMM35131920/1 QUESTION 3 [10 Marks] a) Briefly discuss the following terms in heat transfer:...
ASSIGNMENT 1 BMM35131920/1 QUESTION 3 [10 Marks] a) Briefly discuss the following terms in heat transfer: i. Blackbody ii. Absorptivity iii. Convection iv. Specific heat v. Thermal conductivity (5 Marks) b) An industrial galvanized pipe (Figure Q3) that carries SiO2 nanofluid as cooling liquid passes through a factory in which the air is at 27°C. The outside diameter of the pipe is 75 mm, and its surface temperature and emissivity are 200 °C and 0.8, respectively. If the coefficient associated...
art II- Show your work 17 Marks team at 320°C flows in a stainless steel pipe...
art II- Show your work 17 Marks team at 320°C flows in a stainless steel pipe (kr 15 W/m "C) whose inner and outer diameters are 5 em and 5.5 cm, respectively. The pipe is covered with 3-cm-thick glass wool insulation (k 0.038 W m·°C). Heat is lost to the surroundings at 5°C by natural convection and radiation, with a combined natural convection and radiation heat transfer coefficient of hi-15 w/m.。C. The convective heat transfer coefficient inside the pipe to...
a 0.4 m diameter, thin walled steel pipe is used to transport saturated steam Problem 3.049...
a 0.4 m diameter, thin walled steel pipe is used to transport
saturated steam
Problem 3.049 A 0.4-m-diameter, thin-walled steel pipe is used to transport saturated steam at a pressure of 20 bars in a room for which the air temperature is 25°C and the convection heat transfer coefficient at the outer surface of the pipe is 20 W/m2-K. (a) What is the heat loss per unit length from the bare pipe (no insulation)? (b) Estimate the heat loss per...
Cold conditioned air at 10°C is flowing inside a 1.5 cm thick square aluminum (k = 240 w/mK) duct...
Cold conditioned air at 10°C is flowing inside a 1.5 cm thick square aluminum (k = 240 w/mK) duct of inner cross section of 25x25cm at a mass flow rate of 1.0 kg/s. The duct is exposed to air at 35°C with a combined convection-radiation heat transfer coefficient of 15 W/m2K. The convection heat transfer coefficient at the inner surface is 75 W/.m2.K. If the air temperature in the duct should not increase by more than 1°C determine the maximum...
QUESTION 1 Quarter of the area of a 5m x 3m outside wall of a house...
QUESTION 1 Quarter of the area of a 5m x 3m outside wall of a house is made of glass windows. The wall is 15 cm thick and has an average thermal conductivity of 0.8 W/m K. The window glass is 8 mm thick and has an average thermal conductivity of 0.15 W/m K. On a winter day the inside temperature of the wall and the glass is 20°C, and the outside air temperature is -10°C. The outside convection heat...
A 15 cm diameter, 2 cm thick sight glass installed in the wall of a glass...
A 15 cm diameter, 2 cm thick sight glass installed in the wall of a glass fired boiler allows the operator to observe conditions inside the boiler during operation. During normal boiler operation, the inside surface of the sight glass is 130C. Due to natural convection current in the warm boiler room, air at 35C flows vertically across the outside surface of the sight glass, giving the heat transfer coefficient of 25 ?/?2 ?. The sight glass is made of...
Problem : A cryogenic flui d is flowing in a 304 SS pipe. The pipe is...
Problem
:
A cryogenic flui
d is flowing in a
304 SS
pipe.
The pipe is insulated
on its outside surface
with
6
-
mm thick,
evacuated,
aluminum foil/glass mat insulation.
(“Evacuated” means a partial vacuum is drawn on the
insulation to
remove air that would otherwise fill
pores inside the insulation.)
The pipe
inside diameter
is 127 mm; it’s outside diameter is 138 mm.
The
fluid temperature is
-
173
o
C
.
T
he
air temperature
outside the...
a) what is the heat loss per unit length from the pipe in
W/m?
b) Estimate the heat loss per unit length if a 50 mm thick layer
of insulation with a conductivity of 0.058 W/m K. Neglect radiation
for this part.
3. A 0.20-m diameter, thin-walled steel pipe is used to transport saturated steam at a temperature of 486K in a room for which the air temperature is 25°C and convection heat transfer coefficient at the outer surface of...
HELP MEEE
An uninsulated steam pipe passes through a room where the temperatures of the air and its walls are 38 degrees. The outer diameter of the pipe is 90 mm, the temperature and spreading rate of its surface are 200 degrees and 0.8, respectively. Calculate the radiating power of the surface and the radiation to the surface. Since the heat transfer coefficient with natural convection from the surface to the air is 25 w/m^2.K, what is the heat loss...
ASSIGNMENT 1 BMM35131920/1 QUESTION 3 [10 Marks] a) Briefly discuss the following terms in heat transfer: i. Blackbody ii. Absorptivity iii. Convection iv. Specific heat v. Thermal conductivity (5 Marks) b) An industrial galvanized pipe (Figure Q3) that carries SiO2 nanofluid as cooling liquid passes through a factory in which the air is at 27°C. The outside diameter of the pipe is 75 mm, and its surface temperature and emissivity are 200 °C and 0.8, respectively. If the coefficient associated...
art II- Show your work 17 Marks team at 320°C flows in a stainless steel pipe (kr 15 W/m "C) whose inner and outer diameters are 5 em and 5.5 cm, respectively. The pipe is covered with 3-cm-thick glass wool insulation (k 0.038 W m·°C). Heat is lost to the surroundings at 5°C by natural convection and radiation, with a combined natural convection and radiation heat transfer coefficient of hi-15 w/m.。C. The convective heat transfer coefficient inside the pipe to...
a 0.4 m diameter, thin walled steel pipe is used to transport
saturated steam
Problem 3.049 A 0.4-m-diameter, thin-walled steel pipe is used to transport saturated steam at a pressure of 20 bars in a room for which the air temperature is 25°C and the convection heat transfer coefficient at the outer surface of the pipe is 20 W/m2-K. (a) What is the heat loss per unit length from the bare pipe (no insulation)? (b) Estimate the heat loss per...
Cold conditioned air at 10°C is flowing inside a 1.5 cm thick square aluminum (k = 240 w/mK) duct of inner cross section of 25x25cm at a mass flow rate of 1.0 kg/s. The duct is exposed to air at 35°C with a combined convection-radiation heat transfer coefficient of 15 W/m2K. The convection heat transfer coefficient at the inner surface is 75 W/.m2.K. If the air temperature in the duct should not increase by more than 1°C determine the maximum...
QUESTION 1 Quarter of the area of a 5m x 3m outside wall of a house is made of glass windows. The wall is 15 cm thick and has an average thermal conductivity of 0.8 W/m K. The window glass is 8 mm thick and has an average thermal conductivity of 0.15 W/m K. On a winter day the inside temperature of the wall and the glass is 20°C, and the outside air temperature is -10°C. The outside convection heat...
Problem
:
A cryogenic flui
d is flowing in a
304 SS
pipe.
The pipe is insulated
on its outside surface
with
6
-
mm thick,
evacuated,
aluminum foil/glass mat insulation.
(“Evacuated” means a partial vacuum is drawn on the
insulation to
remove air that would otherwise fill
pores inside the insulation.)
The pipe
inside diameter
is 127 mm; it’s outside diameter is 138 mm.
The
fluid temperature is
-
173
o
C
.
T
he
air temperature
outside the...
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