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Cooling water available at 680F is flowing through 1 in diameter tube at a rate of...
Cooling water available at 680F is flowing through 1 in diameter tube at a rate of 62000 lb/hr to cool 7000 lb/hr of a lube oil from 200 to 1000F. The specific heat of the lube is 0.62 Btu/lbm oF and viscosity is 5 cp, thermal conductivity is 0.067 Btu/ft-hr °F. The overall heat transfer coefficient is 35 Btu/ft? hr of. It is considered for a single pass exchanger with 44 tubes are requires. a. Draw a schematic diagram of...
Water flows through a 0.5 mm thick tube ( thermal conductivity of 16 W/m..C) with a...
Water flows through a 0.5 mm thick tube ( thermal conductivity of 16 W/m..C) with a inner diameter of 1.5 cm at 70°C such that the convective heat transfer coefficient is 3500 W/m² . •C. Let us consider the outside of the tube is 20oC and it loses heat by free convection with ho=7.6W/m² • •C. a. Draw the schematic diagram of the process b. Find out which one is the controlling resistance c. Calculate the overall heat-transfer coefficient per...
be clear Problem 3 (60 Points). A 1-2 shell-and-tube heat exchanger must be designed to heat...
be clear
Problem 3 (60 Points). A 1-2 shell-and-tube heat exchanger must be designed to heat 2.5 kg/s of water from 15 to 85°C. The heating is to be accomplished by passing hot engine oil at a rate of 5.2 kg/s, which is available at 160°C, through the shell side of the exchanger. The oil is known to provide an average convection coefficient of 400 W/m2K on the outside of the tubes. Ten tubes passes the water through the shell....
A pipe with insulation material is used to carry steam to an operating plant. The conditions...
A pipe with insulation material is used to carry steam to an operating plant. The conditions and dimensions for the system are as follows Variable Value Length of pipe, L 100 ft Inner diameter of pipe, Do 1 inch Outer diameter of pipe, D1 1.24 inches Outer diameter of insulation, D2 2 inches Inside film heat transfer coefficient for condensing saturated steam, ho 800 Btu/hr-ft2.oF Outside film heat transfer coefficient for air, ht 2 Btu/hr-ft2.oF Thermal conductivity of the pipe,...
2). A hydrocarbon fluid is to be cooled from 90 to 15 C at a rate...
2). A hydrocarbon fluid is to be cooled from 90 to 15 C at a rate of 9.72 ton per hr. pass shell and tube heat exchanger with the following specification is available A single- Number of tubes 250 1.0 m 23.5 mm 25 mm 15 W m- K-I Tube length Internal tube diameter External tube diameter Thermal conductivity of tube wall Chilled water is supplied at 4C and is normally discharged at 10 C. From experience it is assumed...
please do 11.33 11.32 A single-pass, cross-flow heat exchanger uses hot exhaust gases (mixed) to heat...
please do 11.33
11.32 A single-pass, cross-flow heat exchanger uses hot exhaust gases (mixed) to heat water (unmixed) from 30 to 80°C at a rate of 3 kg/s. The exhaust gases, hav- ing thermophysical properties similar to air, enter and exit the exchanger at 225 and 100°C, respectively. If the overall heat transfer coefficient is 200 W/m2.K, estimate the required surface area. 11.33 Consider the fluid conditions and overall heat transfer coefficient of Problem 11.32 for a concentric tube heat...
PROBLEM 2.1. Determine the steady-state temperature of the surface of the wire of 0.25 in. diameter...
PROBLEM 2.1. Determine the steady-state temperature of the surface of the wire of 0.25 in. diameter and 2, 1 ft long, carrying a current of 50 A. The convective heat transfer coefficient is 4.0 BTUhr-ft-oF, temperature of the air surrounding the wire is 32°F, the electrical resistivity of the material of the wire is 1.5 μΩ-ft and its thermal conductivity is 11 BTU/hr-ft-up,
please answer my heat transfer problem thank you!! heat transfer problem a furnace wall is constructed...
please answer my heat transfer problem thank you!! heat transfer problem a furnace wall is constructed of firrebrick 6in thick. The temperature of the wall is 1300F, and the T outside of the wall is 175 F. If the mean thermal conductivity under these conditions is 0.17 BTU/h-ft-F, what is the rate of heat loss through a 10 ft2 wall of the surface? ans. 3825 BTU/hr
PROBLEM 2.1. Determine the steady-state temperature of the surface of the wire of 0.25 in. diamet...
(2.1 for reference, solving 2.2)
PROBLEM 2.1. Determine the steady-state temperature of the surface of the wire of 0.25 in. diameter and 2, 1 ft long, carrying a current of 50 A. The convective heat transfer coefficient is 4.0 BTUhr-ft-oF, temperature of the air surrounding the wire is 32°F, the electrical resistivity of the material of the wire is 1.5 μΩ-ft and its thermal conductivity is 11 BTU/hr-ft-up, PROBLEM 2.2. Considering the wire of Problem 2.1, perform the following parametıri...
Problem 3 (20 points) A cross-flow heat exchanger consists of a bundle of 32 tubes in a long duct. Hot water at 150°C and a mean velocity of 0.5 m/s enters the tubes having inner and outer diameters...
Problem 3 (20 points) A cross-flow heat exchanger consists of a bundle of 32 tubes in a long duct. Hot water at 150°C and a mean velocity of 0.5 m/s enters the tubes having inner and outer diameters of 10.2mm and 12.5mm and has to be cooled to 136°C. The tubes are made of steel of thermal conductivity k-40 W/m.K. Air at 10°c enters the exchanger (unfinned) with a volumetric flow rate of 1.0 m3/s. The convective heat transfer coefficient...
Cooling water available at 680F is flowing through 1 in diameter tube at a rate of 62000 lb/hr to cool 7000 lb/hr of a lube oil from 200 to 1000F. The specific heat of the lube is 0.62 Btu/lbm oF and viscosity is 5 cp, thermal conductivity is 0.067 Btu/ft-hr °F. The overall heat transfer coefficient is 35 Btu/ft? hr of. It is considered for a single pass exchanger with 44 tubes are requires. a. Draw a schematic diagram of...
Water flows through a 0.5 mm thick tube ( thermal conductivity of 16 W/m..C) with a inner diameter of 1.5 cm at 70°C such that the convective heat transfer coefficient is 3500 W/m² . •C. Let us consider the outside of the tube is 20oC and it loses heat by free convection with ho=7.6W/m² • •C. a. Draw the schematic diagram of the process b. Find out which one is the controlling resistance c. Calculate the overall heat-transfer coefficient per...
be clear
Problem 3 (60 Points). A 1-2 shell-and-tube heat exchanger must be designed to heat 2.5 kg/s of water from 15 to 85°C. The heating is to be accomplished by passing hot engine oil at a rate of 5.2 kg/s, which is available at 160°C, through the shell side of the exchanger. The oil is known to provide an average convection coefficient of 400 W/m2K on the outside of the tubes. Ten tubes passes the water through the shell....
A pipe with insulation material is used to carry steam to an operating plant. The conditions and dimensions for the system are as follows Variable Value Length of pipe, L 100 ft Inner diameter of pipe, Do 1 inch Outer diameter of pipe, D1 1.24 inches Outer diameter of insulation, D2 2 inches Inside film heat transfer coefficient for condensing saturated steam, ho 800 Btu/hr-ft2.oF Outside film heat transfer coefficient for air, ht 2 Btu/hr-ft2.oF Thermal conductivity of the pipe,...
2). A hydrocarbon fluid is to be cooled from 90 to 15 C at a rate of 9.72 ton per hr. pass shell and tube heat exchanger with the following specification is available A single- Number of tubes 250 1.0 m 23.5 mm 25 mm 15 W m- K-I Tube length Internal tube diameter External tube diameter Thermal conductivity of tube wall Chilled water is supplied at 4C and is normally discharged at 10 C. From experience it is assumed...
please do 11.33
11.32 A single-pass, cross-flow heat exchanger uses hot exhaust gases (mixed) to heat water (unmixed) from 30 to 80°C at a rate of 3 kg/s. The exhaust gases, hav- ing thermophysical properties similar to air, enter and exit the exchanger at 225 and 100°C, respectively. If the overall heat transfer coefficient is 200 W/m2.K, estimate the required surface area. 11.33 Consider the fluid conditions and overall heat transfer coefficient of Problem 11.32 for a concentric tube heat...
PROBLEM 2.1. Determine the steady-state temperature of the surface of the wire of 0.25 in. diameter and 2, 1 ft long, carrying a current of 50 A. The convective heat transfer coefficient is 4.0 BTUhr-ft-oF, temperature of the air surrounding the wire is 32°F, the electrical resistivity of the material of the wire is 1.5 μΩ-ft and its thermal conductivity is 11 BTU/hr-ft-up,
(2.1 for reference, solving 2.2)
PROBLEM 2.1. Determine the steady-state temperature of the surface of the wire of 0.25 in. diameter and 2, 1 ft long, carrying a current of 50 A. The convective heat transfer coefficient is 4.0 BTUhr-ft-oF, temperature of the air surrounding the wire is 32°F, the electrical resistivity of the material of the wire is 1.5 μΩ-ft and its thermal conductivity is 11 BTU/hr-ft-up, PROBLEM 2.2. Considering the wire of Problem 2.1, perform the following parametıri...
Problem 3 (20 points) A cross-flow heat exchanger consists of a bundle of 32 tubes in a long duct. Hot water at 150°C and a mean velocity of 0.5 m/s enters the tubes having inner and outer diameters of 10.2mm and 12.5mm and has to be cooled to 136°C. The tubes are made of steel of thermal conductivity k-40 W/m.K. Air at 10°c enters the exchanger (unfinned) with a volumetric flow rate of 1.0 m3/s. The convective heat transfer coefficient...
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