Homework Answers
Add Answer to:
Hot water at 80°C flows through pipe is enclosed by a thin shell with a 120...
Pressurized steam at 400 K flows through a long, thin-walled pipe of 0.6-m diameter. The pipe...
Pressurized steam at 400 K flows through a long, thin-walled pipe of 0.6-m diameter. The pipe is enclosed in a concrete (stone mix) casing that is of square cross section and 1.75 m on a side. The axis of the pipe is centered in the casing, and the outer surfaces of the casing are maintained at 300 K. What is the rate of heat loss per unit length of pipe, in W/m? q' = i W/m
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...
Metal Shield = 0.8 4-02 4. (Total 8pts) Hot gases flows into a long pipe of...
Metal Shield = 0.8 4-02 4. (Total 8pts) Hot gases flows into a long pipe of 0.05-m diameter and at a certain location the flow has a temperature of T.-700K and heat transfer coefficient of h. For safety reasons, the pipe is to be covered with a thin concentric metal shield at Tai - 337K with a 0.1-m diameter. The emissivity of the pipe wall surface is Epi-. The inside and outside surface emissivities of the shield are a =...
Engine oil supplied through a 2-cm-diameter thin walled copper pipe (k = 385 W/kg·ºC) is to...
Engine oil supplied through a 2-cm-diameter thin walled copper pipe (k = 385 W/kg·ºC) is to be heated from 20ºC to 60ºC at a rate of 0.3 kg/s in a double-pipe heat exchanger by condensing steam at a temperature of 130ºC, which is supplied through an outer pipe with a diameter of 4 cm. If the heat exchanger is well insulated, determine the length of the heat exchanger required
Twenty [kw] of heat is to be removed from 375 [k] water flowing at 0.15 [kg/s] into the inner pipe of concentric tube heat exchanger. Cooling water enters the annulus at 290 [k] and leaves at 320...
Twenty [kw] of heat is to be removed from 375 [k] water flowing at 0.15 [kg/s] into the inner pipe of concentric tube heat exchanger. Cooling water enters the annulus at 290 [k] and leaves at 320 [k] with a flow in the opposite direction of the inner flow. The diameter of the thin- walled inner pipe is 2.5 [cm] a) b) c) Calculate the exit temperature of the hot fluid and the mass flow rate of the cold fluid...
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...
Engine oil supplied through a 2cm diameter thin walled copper pipe. k-385w/kg,c is to be heated...
Engine oil supplied through a 2cm diameter thin walled copper pipe. k-385w/kg,c is to be heated from 20C to 60C at a rate of 0.3kg/s in a double-pipe heat exchanger by condensing steam at a temperature of 130C, which is supplied through an outer pope with a diameter of 2 cm. if the heat exchager is well insulated determine the length of the heat exchanger
Steam at T = 300C flows in a cast iron pipe shell with thermal conductivity k1=80W/mC,...
Steam at T = 300C flows in a cast iron pipe shell with thermal conductivity k1=80W/mC, inner and outer diameter D1 = 5cm, and D2 =6cm respectively, and length L = 1m (notice that the cast iron pipe shell is a zone of conduction physically realized by the space between two concentric cylinders). The heat transfer coefficient for the steam inside the pipe is h1 = 60 W/m2. Furthermore, heat is lost to the surroundings at T2 = 5C through...
3. Hot water at an average temperature of 60°C and an average velocity of 0.6 m/s...
3. Hot water at an average temperature of 60°C and an average velocity of 0.6 m/s is flowing through a 5- m section of a thin-walled hot water pipe that has arn outer diameter of 2.5 cm. The pipe passes through the centre of a 14 cm-thick wall filled with fiberglass insulation (k-0.035 W/rm C), If the surfaces of the wall are at 18 C, determine (a) the rate of heat transfer from the pipe to the air in the...
a pipe carrying hot water and another carrying cold water are buried underground such that the...
a pipe carrying hot water and another carrying cold water are buried underground such that the two pipes are parallel to each other. The distance between the pipes is 500 mm and the thermal conductivity of the soil is 0.05 W/m K. the outer diameter of the hot water pipe is 10 cm and that for the cold water pipe is 7.5 cm. The surface temperatures of the pipes are 175C and 5C respectively. Determine the heat transfer rates between...
Pressurized steam at 400 K flows through a long, thin-walled pipe of 0.6-m diameter. The pipe is enclosed in a concrete (stone mix) casing that is of square cross section and 1.75 m on a side. The axis of the pipe is centered in the casing, and the outer surfaces of the casing are maintained at 300 K. What is the rate of heat loss per unit length of pipe, in W/m? q' = i W/m
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...
Metal Shield = 0.8 4-02 4. (Total 8pts) Hot gases flows into a long pipe of 0.05-m diameter and at a certain location the flow has a temperature of T.-700K and heat transfer coefficient of h. For safety reasons, the pipe is to be covered with a thin concentric metal shield at Tai - 337K with a 0.1-m diameter. The emissivity of the pipe wall surface is Epi-. The inside and outside surface emissivities of the shield are a =...
Twenty [kw] of heat is to be removed from 375 [k] water flowing at 0.15 [kg/s] into the inner pipe of concentric tube heat exchanger. Cooling water enters the annulus at 290 [k] and leaves at 320 [k] with a flow in the opposite direction of the inner flow. The diameter of the thin- walled inner pipe is 2.5 [cm] a) b) c) Calculate the exit temperature of the hot fluid and the mass flow rate of the cold fluid...
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...
3. Hot water at an average temperature of 60°C and an average velocity of 0.6 m/s is flowing through a 5- m section of a thin-walled hot water pipe that has arn outer diameter of 2.5 cm. The pipe passes through the centre of a 14 cm-thick wall filled with fiberglass insulation (k-0.035 W/rm C), If the surfaces of the wall are at 18 C, determine (a) the rate of heat transfer from the pipe to the air in the...
Most questions answered within 3 hours.
-
find the critical value associated with a right sided hypothesis of
the mean using a sample...
asked 1 hour ago -
Which of the following statements is true with respect to a
simple linear regression model?
a....
asked 2 hours ago -
The energy required to remove an electron from a surface of a
solid element is called...
asked 3 hours ago -
How would you train your employees to avoid risks of using
mobile devices?
asked 4 hours ago -
Assume Kw = 1.01 ✕ 10−14
For pure water, we can calculate [H3O+ ] = [OH...
asked 5 hours ago -
Suppose that on a temperature scale X, water boils at 203.0°X
and freezes at -105.7°X. What...
asked 5 hours ago -
BaS crystallizes in a cubic unit cell with S2- ions on each
corner and each face....
asked 6 hours ago -
A. 0≤P(Oi)≤10≤P(Oi)≤1 for each i
B. P(Oi)≤0P(Oi)≤0
C. P(Oi)=1+P(OCi)P(Oi)=1+P(OiC)
D. P(Oi)≥1P(Oi)≥1
If an experiment consists of...
asked 8 hours ago -
A battery has an emf of 9.20V and an internal resistance of 1.20
ohm. a)What resistance...
asked 7 hours ago -
The area of an elastic circular loop decreases at a constant
rate, dA/dt = −6.60×10−3 m2/s...
asked 9 hours ago -
The denaturation of proteins can be described by the
equilibrium
F⇌U
where F and U represent...
asked 10 hours ago -
Please answer what the maximum and minimum force is, and the
angle on the ion is...
asked 10 hours ago