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Problem #3 (15 points) A pipe carrying high-temperature water is to be insulated and then mounted...
Given: The size of the insulated pipe for transporting hot water is to be minimized. The...
Given: The size of the insulated pipe for transporting hot water is to be minimized. The size of the insulated pipe can be expressed as, y = D + 2T, where D is the diameter of the pipe, T is the insulation thickness, The total annual operating cost consists of the sum of the pumping cost and the heating cost, and it is to be no more than $40,000. Pumping cost = 8/D5 Heating cost = 1500/T Find: (a) the...
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...
Chilled water enters a thin-shelled 5-cm-diameter, 150-m-long pipe at 7°C at a rate of 0.98 kg/s...
Chilled water enters a thin-shelled 5-cm-diameter, 150-m-long pipe at 7°C at a rate of 0.98 kg/s and leaves at 8°C. The pipe is exposed to ambient air at 30°C with a heat transfer coefficient of 9 W/m2.K. If the pipe is to be insulated with glass wool insulation (k0.05 W/m-K) in order to decrease the temperature rise of water to 0.25°C, determine the required thickness of the insulation.
Exercise 1.16 An insulated district heating pipe with a total diameter d = 0.4 m is laid in the ground at a depth of h = 1.2 m. For a long cold period with an average ground surface temperature o...
Exercise 1.16 An insulated district heating pipe with a total diameter d = 0.4 m is laid in the ground at a depth of h = 1.2 m. For a long cold period with an average ground surface temperature of 0°C and a temperature at the outer edge of the pipe insulation of 20°C, the heat loss per 1km of steam pipe must be calculated. The thermal conductivity of the soil should be assumed to be 0.6 W/mk
Exercise 1.16...
Water enters a large circular pipe of diameter D with a mean temperature of Tmi and...
Water enters a large circular pipe of diameter D with a mean temperature of Tmi and mass flow rate of ml . The pipe is half-embedded in insulation as shown in the figure below. Conditions are such that a linearly- increasing heat flux is applied to the exposed top half of the pipe. a. If the heat flux profile is q-q" + Or , derive an equation that describes the mean temperature of the water as a function of its...
*Using C++ (no printf command)* So, this is a basic cost vs. benefit problem. For different...
*Using C++ (no printf command)* So, this is a basic cost vs. benefit problem. For different thicknesses of insulation, we will need to calculate the cost of purchasing and installing that thickness of insulation and compare that to the fuel savings generated by insulating the pipe with that thickness. DISCUSSION: Your program will ultimately need to determine overall savings (in dollars) for each thickness and then find the thickness that corresponds to the largest overall savings. The overall savings is...
3. CIN: A 50 m long section of a steam pipe at 15°C. The average temperature...
3. CIN: A 50 m long section of a steam pipe at 15°C. The average temperature of the outer surface of combined heat transfer coefficient or the rate of heat loss from the steam plp generated in an natural gas furnance $0.52/therm (1 therm = 105, 0.035 W/mK) needed in order to say remain constant at 150°C. (10 marks) For a steam pipe whose outer diameter is 10 cm passes through an open space mperature of the outer surface of...
Problem 3: An old pipe 2 m in diameter has a roughness of would reduce the pipe roughness to- 1 mm. e 30 mm. A 12-m...
Problem 3: An old pipe 2 m in diameter has a roughness of would reduce the pipe roughness to- 1 mm. e 30 mm. A 12-mm thick coating 0 a) How much the friction head loss would be reduced per kilometer of pipe, for water at 20 °C at a flow rate of 6 m3/s? b) How much pumping costs would be reduced per kilometer of pipe? The pumps are 75% efficient and the cost of energy is si per...
please do it correctly ! last person gave me wrong data ! please help ! Problem 3: An old pipe 2 m in diameter has a...
please do it correctly ! last person gave me wrong data !
please help !
Problem 3: An old pipe 2 m in diameter has a roughness of -30 mm. A 12-mm thick coating would reduce the pipe roughness to & 1 mm. 0 0 l km-pipe a) How much the friction head loss would be reduced per kilometer of pipe, for water at 20 °C at a flow rate of 6 m3/s? b) How much pumping costs would be...
5. Hot water at 50 C is routed from one building in which it is generated...
5. Hot water at 50 C is routed from one building in which it is generated to an adjoining building in which it is used for space heating. Transfer between the buildings occurs in a steel pipe (k -60 W/mK) of 100-mm outside diameter and 8-mm wall thickness. During the winter, representative environmental conditions involve air at T=-5 C and V= 3 m/s in cross flow over the pipe (a) If the cost of producing the hot water is $0.10...
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...
Chilled water enters a thin-shelled 5-cm-diameter, 150-m-long pipe at 7°C at a rate of 0.98 kg/s and leaves at 8°C. The pipe is exposed to ambient air at 30°C with a heat transfer coefficient of 9 W/m2.K. If the pipe is to be insulated with glass wool insulation (k0.05 W/m-K) in order to decrease the temperature rise of water to 0.25°C, determine the required thickness of the insulation.
Exercise 1.16 An insulated district heating pipe with a total diameter d = 0.4 m is laid in the ground at a depth of h = 1.2 m. For a long cold period with an average ground surface temperature of 0°C and a temperature at the outer edge of the pipe insulation of 20°C, the heat loss per 1km of steam pipe must be calculated. The thermal conductivity of the soil should be assumed to be 0.6 W/mk
Exercise 1.16...
Water enters a large circular pipe of diameter D with a mean temperature of Tmi and mass flow rate of ml . The pipe is half-embedded in insulation as shown in the figure below. Conditions are such that a linearly- increasing heat flux is applied to the exposed top half of the pipe. a. If the heat flux profile is q-q" + Or , derive an equation that describes the mean temperature of the water as a function of its...
3. CIN: A 50 m long section of a steam pipe at 15°C. The average temperature of the outer surface of combined heat transfer coefficient or the rate of heat loss from the steam plp generated in an natural gas furnance $0.52/therm (1 therm = 105, 0.035 W/mK) needed in order to say remain constant at 150°C. (10 marks) For a steam pipe whose outer diameter is 10 cm passes through an open space mperature of the outer surface of...
Problem 3: An old pipe 2 m in diameter has a roughness of would reduce the pipe roughness to- 1 mm. e 30 mm. A 12-mm thick coating 0 a) How much the friction head loss would be reduced per kilometer of pipe, for water at 20 °C at a flow rate of 6 m3/s? b) How much pumping costs would be reduced per kilometer of pipe? The pumps are 75% efficient and the cost of energy is si per...
please do it correctly ! last person gave me wrong data !
please help !
Problem 3: An old pipe 2 m in diameter has a roughness of -30 mm. A 12-mm thick coating would reduce the pipe roughness to & 1 mm. 0 0 l km-pipe a) How much the friction head loss would be reduced per kilometer of pipe, for water at 20 °C at a flow rate of 6 m3/s? b) How much pumping costs would be...
5. Hot water at 50 C is routed from one building in which it is generated to an adjoining building in which it is used for space heating. Transfer between the buildings occurs in a steel pipe (k -60 W/mK) of 100-mm outside diameter and 8-mm wall thickness. During the winter, representative environmental conditions involve air at T=-5 C and V= 3 m/s in cross flow over the pipe (a) If the cost of producing the hot water is $0.10...
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