Fluid is flowing through a 20 mm inside diameter and 25 mm outside diameter brass tube at no leaking with temperature at 65℃ and length of 10 m. Surface conduction of hot fluid is 5.2W/(m^2℃) and thermal conductivity of brass is 12.84W/(m℃). Brass tube is covered by silica of 6 mm thickness with thermal conductivity of 13.84W/(m℃) . Outside of it, is a fluid with 45℃ with surface conductance of 3.2W/(m^2℃). Find the heat transfer from the hot fluid with temperature of 65℃ to fluid with temperature of 45℃

Fluid is flowing through a 20 mm inside diameter and 25 mm outside diameter brass tube at no leaking with temperature at 65℃ and length of 10 m. Surface conduction of hot fluid is 5.2W/(m^2℃) and thermal conductivity of brass is 12.84W/(m℃). Brass tube is covered by silica of 6 mm thickness with thermal conductivity of 13.84W/(m℃) . Outside of it, is a fluid with 45℃ with surface conductance of 3.2W/(m^2℃). Find the heat transfer from the hot fluid with temperature of 65℃ to fluid with temperature of 45℃

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter6: Forced Convection Over Exterior Surfaces

Section: Chapter Questions

Problem 6.21P

See similar textbooks

Similar questions

Q.3 A firm produces frozen fruits and vegetables, and a venturimeter is used in this process.In a certain step of the process, the cherries are introduced to the cold air stream at -12oC with a 3 in. pipe connected vertically to the throat of the venturimeter. Venturimeter is connected to a pipe 4 in. in diameter. If the air velocity in the throat is 5 times the terminal velocity of the cherries and the ratio of throat/pipe diameter is 0.6, what should be the flow rate of air? Assume that the density of cherries is 1200 kg/m3 and the average diameters are 12 mm. What should be the lay-out of the pipeline between venturimeter and freeze-dryer to prevent the striking of the cherries to the walls? Is there any settling possibility of the cherries at the exit of the venturimeter?
A fluid with viscosity η = 5.2 x 10-3 Pa s is flowing horizontally in the pipe shown below. Section 1, 2, and 3 have radii of r1 = 8 cm, r2 = 6 cm, and r3 = 4 cm, respectively. All section have the same length L = 5.0 m. The speed of the fluid in Section 1 is v1 = 1.49 m/s, and the volume flow rate in Section 2 is F2 = 0.025 m3/s. What is the volume flow rate in Section 1? What is the pressure difference in Section 2 due to the viscosity of the fluid? What is the speed of the fluid in Section 3? What is the pressure difference in Section 3 due to the viscosity of the fluid?
An oil has 0.62 inch steel tube, through which flows an oil. The properties of oil are as follows; μ = 0.034 lbs/ft-sec, μb = 0.044 lbs/ft-sec, μw = 0.004 lbs/ft-sec, and specific gravity at 60°F is 0.899. The oil neters at a temperature of t1 = 60°F and flows with an average velocity of 4 ft/sec. The inside ssurface area is 0.1613 ft2 per feet length, and the inside sectional area is 0.3019 in2. The length of one pass of the tube is 10 feet. Considering steam at 215°F surround the tubes. Assume that the inside surface temperature of the pipe is 210°F and a bulk temperature of 72°F. If the specific heat of oil is 0.5 btu/lbs-°F and its conductivity k = 0.08 Btu-ft/hr-F-ft2, what is the temperature at the end of 10 feet pass. Show your complete solution and illustration.
A fluid flowing through a tube 20ft long and of 0.62 inch inside diameter has the following has the following physical properties: specific heat = 0.65 BTU/lb degFthermal conductivity = 0.085 BTU/ hr ft degFuw = viscosity at 122 degF (tube surface temp) = 4.0 lb/ft hrub = viscosity at 212 degF (bulk fluid temp)= 1.95 lb/ ft hr 1. What is the Reynolds number if the flowrate is 2000 lb/hr?a. 24500b. 22800c. 27200d. 25300 2. What is the heat transfer coefficient (Btu/hr-ft^2-K) if the flowrate is 2000 lb/hr?a. 280b. 208c. 203d. 282 3. If the flowrate is reduced to 100 lb/h, What would be the heat transfer coefficient (Btu/hr-ft^2-K)?a. 9b. 10c. 11d. 12
SAE 10 oil at 20° (ρ=869 kg/m³, μ=8.14 × 10-2 N•s/m²) flows in a 200 mm diameter pipe. Find the maximum velocity for which the flow will be laminar. (ANSWER must be = 0.937 m/s)
You are designing a bioreactor that requires turbulent water flow (Re=2300) for better mixing of materials. Your tube diameter is 1.5 inches. What is the minimum volumetric flow rate needed (in in3/s)? **Answer: 7.14 in^3/s
Piping system has pipes that are 130ft of 2inch inner diameter, 62ft of 5inch inner diameter, and 150ft of 3inch inner diameter. The water flows out at 20 degree C with a flow rate of 0.16ft^3/s (denisty of water is 1.936 slug/ft^3 and velocity is 1*10^-5ft^2/s) pressure drop including major losses now d o the same but only minor losses
Pressure Drop of Power-Law Fluid in Laminar FlowA power-law fluid having a density of 1041 kg/m3 is flowing through 14.9 m of a tubing with an inside diameter of 0.0524 m at an average velocity of 0.0728 m/s. The rheological or flow properties of the fluid are K′ = 15.23N·sn′/m2 (0.318 lbf·sn′/ft2) and n′ = 0.40. Calculate the pressure drop and friction loss using Eq. (9.1-10) for laminar flow. Check the generalized Reynolds number to make sure that the flow is laminar. Repeat part (a) but use the friction-factor method
Water flows along a horizontal pipe of diameter 75 mm. An orifice plates of diameter 50 mm is located in the pipe. Standard pressure tappings are located up and downstream of the orifice plate and the measured pressure difference is 86 kPa. What is the value of ΔHpz that appears in the orifice plate equation? You may take the density of water to be 1000 kg/m3
Water flows through a circular tube with a velocity of 2 m/s. The diameter of the pipe is 14 cm. If the kinematic viscosity of water is 10-6 m2/s and density 1000 kg/m3, the Reynolds number of the flow can be calculated as 280 2800 2.8 x 105 2.8 x 108
8. A coal fired steam boiler uses 3000 kg of coal per hour. Air required for combustion is 15.5 kg ofcoal at barometric pressure of 98.2 KPa. The flue gas has temperature of 285 degree Celsiusand an average molecular weight of 30. Assuming an ash loss of 11% and allowable gas velocityof 7.5 meters per second. Find the diameter of the chimney 9. The gas density is 0.75 kg per cubic meters and air density is of 1.15 kg per cubic meter. If thedriving pressure is 0.25 KPA. Determine the height of the chimney. 10. A powerplant situated at an altitude having an ambient air of 96.53 KPa and 23.88 degreeCelsius. Flue gases at a rate of 5.0 kg per second enter the stack at 200 degree Celsius andleaves at 160 degree Celsius. The flue gases gravimetric analysis are 18% CO2, 7% O2 and 75%N2. Calculate the height of the stack necessary for a driving pressure of 0.20 KPaKindly answer all please. Thank you
An oil has 0.62 inch steel tube, through which flows an oil. The properties of oil are as follows; μ = 0.034 lbs/ft-sec, μb = 0.044 lbs/ft-sec, μw = 0.004 lbs/ft-sec, and specific gravity at 60°F is 0.899. The oil neters at a temperature of t1 = 60°F and flows with an average velocity of 4 ft/sec. The inside surface area is 0.1613 ft2 per foot length, and the inside sectional area is 0.3019 in2. The length of one pass of the tube is 10 feet. Considering steam at 215°F surround the tubes. Assume that the inside surface temperature of the pipe is 210°F and a bulk temperature of 72°F. If the specific heat of oil is 0.5 btu/lbs-°F and its conductivity k = 0.08 Btu-ft/hr-°F-ft2, what is the temperature at the end of 10 feet pass. Answer: t = 61.18 °F Show the complete solution.