A steam main of 150 mm outside diameter containing wet steam at 28 bar is insulated...
A steam main of 150 mm outside diameter containing wet steam at 28 bar is insulated with an inner layer of diatomaceous earth, 40 mm thick, and an outer layer of 85 % magnesia, 25 mm thick. The inside surface of the pipe is at the steam temperature, and the heat transfer coefficient for the outside surface of the lagging is 17 W/m2 K. The thermal conductivities of diatomaceous earth and 85 % magnesia are 0.09, and 0.06 40 ME 366 W/m K, respectively. Neglecting radiation and thermal resistance of the pipe wall, calculate the rat of heat loss per unit length of the pipe and the temperature of the outside surface of the lagging, when the room temperature is 20 degree celsius
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A steam main of 150 mm outside diameter containing wet steam at
28 bar is insulated...
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...
A steel pipe carrying saturated steam at 4000 kpa, is 304.8 mm OD. The pipe is...
A steel pipe carrying saturated steam at 4000 kpa, is 304.8 mm OD. The pipe is 150 m long. Temp outside the pipe is 18 degrees C. It is insulated with formed insulation with thermal conductivity of 0.023 W/m/K. If the design is to allow for condensation of 80 kg of steam per hour, how thick must the insulation be?
PLEASSEEE DRAW A PICTURE l'roblem 1 (45 point diameter of 2.09 em and an outside diameter...
PLEASSEEE DRAW A PICTURE
l'roblem 1 (45 point diameter of 2.09 em and an outside diameter of 2.67 cm. The convective coc and outer pipe surfaces may be taken as 5680 and 22.7 W/m2 oK, respectively. I m air is at 294 K. The thermal conductivity of steel and magnesia are K respectively s) Saturated steam at 0.276 MPa fows inside a steel pipe having an inside e coefficients on the inner The surrounding 42.9 W/m K and .0 675...
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....
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...
2.24 A pipe of 0.3 m outer diameter at a temperature of 160°C is insulated with...
2.24 A pipe of 0.3 m outer diameter at a temperature of 160°C is insulated with a material having a thermal conductivity of k = 0.055 (1 + 2.8 × 10–3T) W/mK where T is in °C. The outside surface temperature is 40°C. Determine the heat flow/m length and the temperature at the mid radius
A 6 in. schedule 80 steel pipe (OD=6.62 in.) will be used to transport 450◦F steam...
A 6 in. schedule 80 steel pipe (OD=6.62 in.) will be used to transport 450◦F steam from a boiler house to a new process unit. The pipe will be buried at a depth of 3 ft (to the pipe centerline). The soil at the plant site has an average thermal conductivity of 0.4 Btu/h · ft · ◦F and the minimum expected ground surface temperature is 20◦F. Estimate the rate of heat loss per foot of pipe length for the...
S A 10-m-long section of an 8 cm (r=4 cm) of external diameter horizontal steam water...
S A 10-m-long section of an 8 cm (r=4 cm) of external diameter horizontal steam water pipe passes through a large room whose temperature is To =15°C. The pipe is insulated with an insulating material of conductivity k=0.01 W/m-°C and 1 cm thick. If the inner surface temperature of the pipe is 95 °C (at r2) and the pipe is exposed to a cross wind of 6.0 m/s, determine the rate of heat loss from the pipe (neglect radiation). Thermal...
I. Steam at 220°C İs transported through an AISI 101 0 carbon steel pipe. The inside...
I. Steam at 220°C İs transported through an AISI 101 0 carbon steel pipe. The inside and outside diameters of the pip glass pipe insulation. e are 12 and 13 cm respectively. The pipe is wrapped with 5 cm thick cellular The ambient air temperature is 8°C. The inside and outside convection heat nts are 95 and 15 W/m2-K respectively. The thermal conductivity of the pipe is 60 W/m-K and for the insulation it is 0.072 W/m-K a. Construct the...
B Steam flows in a steel pipe, which is insulated by gypsum plaster. The inner and...
B Steam flows in a steel pipe, which is insulated by gypsum plaster. The inner and outer diameter of the pipe are 8 cm and 6 cm respectively with pipe length of 20-m. The thickness of gypsum plaster which wraps the pipe is 4 cm. The heat transfer coefficient of the inner pipe and outer insulation are 800 W/m2.°C and 200 W/m2.°C with inner pipe temperature of 200°C and outer insulator temperature of 10°C. The thermal conductivity of the pipe...
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...
PLEASSEEE DRAW A PICTURE
l'roblem 1 (45 point diameter of 2.09 em and an outside diameter of 2.67 cm. The convective coc and outer pipe surfaces may be taken as 5680 and 22.7 W/m2 oK, respectively. I m air is at 294 K. The thermal conductivity of steel and magnesia are K respectively s) Saturated steam at 0.276 MPa fows inside a steel pipe having an inside e coefficients on the inner The surrounding 42.9 W/m K and .0 675...
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...
S A 10-m-long section of an 8 cm (r=4 cm) of external diameter horizontal steam water pipe passes through a large room whose temperature is To =15°C. The pipe is insulated with an insulating material of conductivity k=0.01 W/m-°C and 1 cm thick. If the inner surface temperature of the pipe is 95 °C (at r2) and the pipe is exposed to a cross wind of 6.0 m/s, determine the rate of heat loss from the pipe (neglect radiation). Thermal...
I. Steam at 220°C İs transported through an AISI 101 0 carbon steel pipe. The inside and outside diameters of the pip glass pipe insulation. e are 12 and 13 cm respectively. The pipe is wrapped with 5 cm thick cellular The ambient air temperature is 8°C. The inside and outside convection heat nts are 95 and 15 W/m2-K respectively. The thermal conductivity of the pipe is 60 W/m-K and for the insulation it is 0.072 W/m-K a. Construct the...
B Steam flows in a steel pipe, which is insulated by gypsum plaster. The inner and outer diameter of the pipe are 8 cm and 6 cm respectively with pipe length of 20-m. The thickness of gypsum plaster which wraps the pipe is 4 cm. The heat transfer coefficient of the inner pipe and outer insulation are 800 W/m2.°C and 200 W/m2.°C with inner pipe temperature of 200°C and outer insulator temperature of 10°C. The thermal conductivity of the pipe...
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