(4) Oil with an average temperature of 80°C at an average flow velocity of 0,5 m/s, is flowing by pipeline with an inner diameter of 35 mm and a length of 15 m. Determine the heat transfer coefficient of the oil to the pipe wall, assuming that the average temperature of the pipe wall is 60°C. Oil properties are known, at 80°C: p=840 kg/m³, 'c,=1,926 kJ/(kg-K), n=0,233 Pa-s, 1=0,179 W/(m-K).
Q: A gas is cooled by circulating it in a turbulent regime through the interior of a circular duct with…
A: Given: The diameter of duct, Di = 0.025 m The internal wall temperature, Ti = 310 K The average…
Q: 5) A long aluminum wire of diameter 3 mm is extruded at a temperature of 370°C. The wire is…
A:
Q: Water is to be heated from 20°C to 64°C by flowing through a 5 cm diameter circular pipe as shown in…
A:
Q: Air at atmospheric pressure and 27 degree celsius is blown across a long 4.0-cm diameter tube at a…
A: Solution:
Q: Hot air at atmospheric pressure and 80°C enters an 8-m-long uninsulated square duct of cross-…
A:
Q: Hot air at atmospheric pressure and 85°C enters a 10-m-long uninsulated square duct of cross section…
A: The properties of air at bulk mean temperature of 75 oC, The characteristic length of the duct is…
Q: Hot air flows with a mass rate of m = 0.060 kg/s through an uninsulated sheet metal duct of diameter…
A: Step - 1Given DataMass rate m = 0.060 kg/sDiameter of Duct (D) = 0.18 mHot air entry Temperature…
Q: A tube bank consists of 300 tubes at a distance of 6 cm between the centerlines of any two adjacent…
A:
Q: Q1. Cooling water available at 10°C is used to condense steam at 30°C in the condenser of a power…
A: Given Data The temperature of the cooling water is: T1=10°C The temperature of the condense steam…
Q: Engine oil enters a straight tube with a flow rate of 1 kg/s. The tube has a diameter of 5 mm and…
A: Given: m˙=1 kg/s D= 5mm Ts = 150˚C Tin = 52˚C Tout = 80˚C k = 0.139 W/m.K Pr = 834 Cp = 2072 J/kg.K…
Q: Example 6.21 Water at 50°C enters a 1.5 cm diameter tube with a velocity of 1 m/s. The tube wall is…
A:
Q: Hot engine oil at 150°C is flowing in parallel over a flat plate at a velocity of 2 m/s. Surface…
A: Given data Temperature of hot engine oil To = 1500C = 423K Velocity of oil flow V = 2m/s Length of…
Q: average temperature average flow velocity of m/s, Is flowing by pipeline with an inner diameter of…
A: Given DataTi=80°CV=0.5m/sd=35mm=0.035mL=15mTo=60°Cρ=840kg/m3η=0.233Pa.sλ=0.179W/mK
Q: A tube with a square cross-section 2 mm in side and 1.5 m in length imposes a constant heat flux of…
A:
Q: 5. Steam condensing on the outer surface of a thin-walled circular tube of 50 mm diameter and 6 m…
A: Given, Diameter of the tube , d = 50 mm Length of the tube , L = 6 m. Steam temperature , Ts = 100…
Q: Oranges of 2.5-in-diameter (k= 0.26 Btu/h·ft·°F) and α= 1.4 10-6 ft2/s) initially at a uniform…
A:
Q: Example 4: Hot air at atmospheric pressure and 80°C enters an 8–m-long uninsulated square duct of…
A:
Q: Air at p = 1 atm enters a thin-walled (D = 5-mm diameter) long tube (L = 2 m) at an inlet…
A:
Q: A steel tube with an external diameter equal to 1.5 cm is cooled by the action of a flow cross…
A: Given - Diameter (D) = 1.5 cm = 0.015 m Velocity of the flow (v) = 1 m/s Air tempreature (Ta) = 20…
Q: Hot air at atmospheric pressure and 80°C enters an 8-m-long uninsulated square duct of cross section…
A: Given data To determine Exit temperature of air T2..?? Rate of heat loss from duct to the attic…
Q: Question Three: When 0.6 kg of water per minute is passed through a tube of 2 cm diameter, it is…
A: solution:-Bulk mean temperature Tmi=20°c, Tm0=60°cTm=Tmi+Tmo2=20+602=40°cproperties are…
Q: The filament of a 75-W light bulb may be considered a blackbody radiating into a black enclosure at…
A: Power Q = 75 W Temperature T1 = 70 C or 243 K Diameter d = 0.10 mm Length = 5 cm
Q: Determine the length of a tube through which flows a stream of water if the diameter of the tube is…
A: Given Data in this problem is:Diameter of the pipe =100 mm = 0.1mInlet water…
Q: In the effort to find the best way to cool a smooth thin-walled copper tube, an engineer decided to…
A: Given data: The given diameter of tube is: D=5 cm=0.05 m. The bulk mean temperature is: T=50 C The…
Q: Air at 1 atmosphere and a temperature of 60f enters 1/2-in. id tube with a velocity of 80 fps. The…
A: Given information Pressure of air entering = 1 atmTemperature = 60°F = 288.7056 KDiameter of tube =…
Q: A boiler tube (OD = 3.5 in., ID = 2.7 in) contains water at 1250 psia (tsat = 572 0F). The water…
A: Given Outer diameter = 3.5 in = 0.29 ft Inner diameter = 2.7 in = 0.225 ft Saturation temperature =…
Q: Choose the right answer 1. The mean Nusselt number for fully developed laminar flow in a circular…
A:
Q: Dry and saturated steam at 6 MPa abs. enters a 40m length of 11.5 cm O.D steel pipe at a flow rate…
A: Given, Steam Pressure P1=6MPa Steam Temperature T1=275.586°C (from steam table) Length of the tube…
Q: Engine oil at 60ºC (μ = 0.07399 kg/m s, ρ = 864 kg/m3) flows in a 8-cm-diameter tube with a velocity…
A:
Q: Example 1: The components of an electronic system are located in a 1.5-m-long horizontal duct whose…
A:
Q: A boiler tube (OD = 3.5 in., ID = 2.7 in) contains water at 1250 psia (tsat = 572 0F). The water…
A:
Q: Engine oil flows through a 25-mm-diameter tube at a rate of 0.5 kg/s. The oil enters the tube at a…
A:
Q: Q) Water at 12°C flows in a 2.5-cm-diameter pipe and 10-m-long at an average velocity of 0.1 m/s.…
A: Given: The temperature of water, T = 12°C The diameter of pipe, d = 40 cm = 0.025 m The length of…
Q: Oranges of 2.5-in-diameter (k = 0.26 Btu/h·ft·°F and a = 1.4 * 1026 ft2/s) initially at a uniform…
A: The parameters of oranges are given as, The average heat transfer coefficient is given as, The…
Q: Liquid water flows in a thin-walled circular tube at a mass flow rate of 11 g/s. The water enters…
A: To obtain the solution to the given question, we need to calculate the heat transfer coefficient…
Q: an oil at average temperature of 100 F flows at 1.2 ft/s velocity 0.834in inside diameter horizontal…
A: Given data average temperature of oil, Toil=100 F (310.9K) V=1.2 ft/s D=0.834 in average surface…
Q: Liquid water flows in a thin-walled circular tube at a mass flow rate of 11 g/s. The water enters…
A:
Q: A flat plate of width 1 m and length 0.22 m is maintained at a temperature of 32°C. Ambient fluid at…
A:
Q: Air at 206.8 kPa and an average of 477.6 K is being heated as it flows through a tube of 25.4mm…
A: Given data: Pressure P = 206.8 kPa Temperature T = 477.6 K Inside diameter (di) = 25.4 mm Velocity…
Q: Air is heated to 2atm and 227 °C while circulating through a 3.0 cm diameter tube at a speed of 10…
A:
Q: Consider the flow of oil at 20oC in a 40-cm-diameter pipeline at an average velocity of 0.5 m/s. A…
A:
Q: Heating Air by Condensing Steam.Air is flowing through a tube having an inside diameter of 38.1 mm…
A: During flow through constant wall temperature conditions, since wall temperature remains constant…
Q: Water at an average temperature of 180°F and an average velocity of 4 ft/s flows through a…
A: According to the question water is at a temperature of 180 oF . Write the values of conduction heat…
Q: Hot air flows with a mass rate of m = 0.050 kg/s through an uninsulated sheet metal duct of diameter…
A: Given, mass rate, m˙=0.05 kg/s Duct diameter, D=0.15 m Hot air entering temperature, Ti=103 °C The…
Q: Consider the flow of water at a rate of 0.015 kg/s through a square duct 2 cm by 2 cm whose walls…
A: Given, Ts=100 0CTi=30 0CT=70 0C a=2 cm=0.02 m m˙=0.015 kg/s The properties of the water at…
Q: Air at 1 atm and 300 °C is cooled as it flows at a velocity of 5.0 m/s through a tube with a…
A: Given data: Assumption: The flow through the tube is fully developed and the pipe surface is…
Q: A-Liquid bismuth flows at a rate of 4.5 kg/s through a 5.0-cm-diameter stainless-steel tube. The…
A:
Step by step
Solved in 3 steps with 3 images
- 6.3 Steam at 100 kPa and is flowing across a 5-cm- OD tube at a velocity of 6 m/s. Estimate the Nusselt number, the heat transfer coefficient, and the rate of heat transfer per meter length of pipe if the pipe is at .Water flows in a 3.5-cm-diameter pipe so that the Reynolds number based on diameter is 2000 (laminar flow is assumed). The average bulk temperature is 10◦C. What would the heat transfer coefficient be in W/m2-°C for such a system if the tube wall was subjected to a constant heat flux and the velocity and temperature profiles were completely developed? Evaluate properties at bulk temperature.(7) Oil with an average temperature of 80°C at an average flow velocity of 0,5 m/s, is flowing by pipeline with an inner diameter of 35 mm and a length of 15 m. Determine the heat transfer coefficient of the oil to the pipe wall, assuming that the average temperature of the pipe wall is 60°C. Oil properties are known, at 80°C: p=840 kg/m³, c,=1,926 kJ/(kg-K), n=0,233 Pa-s, 1=0,179 W/(m-K).
- 43% uo 7:52 * ZAIN IQ I. sheet No.3.pdf Homework 01-03 -2021 one-dimensional heat transfer and disregarding radiation, determine the rate of heat transfer through the wall. Q4/ Steam at Te1-320°C flows in a cast iron pipe (k=80W/m.°C) whose inner and outer diameters are D =5cm, and D=5.5cm, respectively. The pipe is covered with 3 cm thick glass wool insulation with k=0.05W/m.°C. Heat is lost to the surroundings at T02=5°C_by natural convection and radiation, with a combined heat transfer coefficient to be h,=18W/m.C. Taking the heat transfer coefficient inside the pipe to be h,=60W/m.C, determine the rate of heat loss from the steam per unit length of the pipe. Also determine the temperature drops across the pipe shell and the insulation. 05/ Determine the overall heat transfer coefficient U based on the outer surface of a D=2.5cm, and D=3.34 cm steel pipe (k=54.0W/m.°C) for the following conditions: inside and outside heat transfer coefficients are 1200W/m."C. and 2000W/m."C…Heat Transfer (Third year) 2020- 2021 Homework 01-03-2021 By Dr. Basil Noori Merzah one-dimensional heat transfer and disregarding radiation, determine the rate of heat transfer through the wall. Q4/ Steam at T01-320°C flows in a cast iron pipe (k=80W/m. C) whose inner and outer diameters are D,=5cm, and D,-5.5cm, respectively. The pipe is covered with 3 cm thick glass wool insulation with k=0.05W/m. C. Heat is lost to the surroundings at T2-5°C by natural convection and radiation, with a combined heat transfer coefficient to be h,=18W/m."C. Taking the heat transfer coefficient inside the pipe to be 2 0 h,-60W/m. C, determine the rate of heat loss from the steam per unit length of the pipe. Also determine the temperature drops across the pipe shell and the insulation. Q5/ Determine the overall heat transfer coefficient U based on the outer surface of a D=2.5cm, and D =3.34 cm steel pipe (k=54.0W/m. C) for the following conditions: inside and outside heat transfer coefficients are…Air enters a rectangular duct measuring 30 cm by 40 cm with a velocity of 8.5 m/s and a temperature of 40 degrees Celsius. The flowing air has a thermal conductivity of 0.028 W/m K, kinematic viscosity of 16.95 x 10-6 m2/s and from empirical correlations, the Nusselt number has been approximated to be 425. Find out the convective heat flow coefficient (h). a. 54.71 W/m2 K b. 34.71 W/m2 K C. 44.71 W/m2 K d. 24.71 W/m2 K
- Water enters a tube at 29°C with a flow rate of 460 kg/h. The rate of heat transfer from the tube wall to the fluid is given as qs′(W/m)=ax, where the coefficient a is 25 W/m2 and x(m) is the axial distance from the tube entrance. (a) Beginning with a properly defined differential control volume in the tube, derive an expression for the temperature distribution Tm(x) of the water. (b) What is the outlet temperature of the water for a heated section 31 m long? (c) Sketch the mean fluid temperature, Tm(x), and the tube wall temperature, Ts(x), as a function of distance along the tube for fully developed and developing flow conditions. (d) What value of a uniform wall heat flux, qs″ (instead of qs′=ax), would provide the same fluid outlet temperature as that determined in part 8.13b? For this type of heating, sketch the temperature distributions requested in part 8.13c.For air flow at a constant wall temperature of 100 ◦C and average bulk temperature of 40 ◦C through a 4-cm-ID pipe, determine the value of average convection coefficient for an inlet velocity of 0.8 m/s if the pipe length is (i) 1 m, (ii) 3 m, (iii) 10 m.Consider a flow of oil at 20oC in a 30 cm diameter pipeline at an average velocity of 2 m/s.A 100 m long section of the horizontal pipeline passes through icy waters of a lake at 0oC.Measurements indicate that the surface temperature of the pipe is very nearly 0oC. Disregardingthe thermal resistance of the pipe material,a) Determine the temperature of the oil when the pipe leaves the lake (Thb).b) Calculate the rate of heat transfer from the oil.
- Q2) Air at 20°C flows over a flat plate having a uniform heat flux of 800 W/m². The flow velocity is 4m/s and the length of the plate is 1.2 m. Determine the value of heat transfer coefficient and also the temperature of the plate as the air leaves the plate.2. Consider a flow of oil at 20oC in a 30 cm diameter pipeline at an average velocity of 2 m/s. A 100 m long section of the horizontal pipeline passes through icy waters of a lake at 0C. Measurements indicate that the surface temperature of the pipe is very nearly 0C. Disregarding the thermal resistance of the pipe material,a) Determine the temperature of the oil when the pipe leaves the lake (Thb).b) Calculate the rate of heat transfer from the oil.Problem: Convection related Water enters a tube at 27°C with a flow rate of 450 kg/h. The rate of heat transfer from the tube wall to the fluid is given as qs′(W/m)=ax, where the coefficient a is 20 W/m^2 and x(m) is the axial distance from the tube entrance. (a) Beginning with a properly defined differential control volume in the tube, derive an expression for the temperature distribution Tm(x) of the water. (b) What is the outlet temperature of the water for a heated section 30 m long? (c) Sketch the mean fluid temperature, Tm(x), and the tube wall temperature, Ts(x), as a function of distance along the tube for fully developed and developing flow conditions.