Heat Transfer Consider a infinitely long pin fin with uniform Ac cross sectional area Write ef effectiveness and Af efficiency
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A: Given: l=0.95m; d=0.65m; t=2.5mm k=157 W/m2K; ambient temperature 20 deg C; h=20 W/mC; and melting…
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A: given data-Wall=0.8m×0.6mT0=10°CFin,L=7cm = 0.07md=3mm =0.003mk=200 W/mKρ=5000 kg/m2nfin=200…
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A: Given: l=0.8m; d=0.7m; t=3mm; k=177 W/m2K; ambient temperature is 25 C; h=20 W/mK; Tb=220 C
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Q: calculate the reduction in the heat transfer rate if a 5-cm-insulation battwith thermal conductivity…
A: As heat transfer is given by, Q=-KAdTdxQA=-0.05*dT0.05=-dT
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A: Given data as per question Dimension of plate =0.8 m x 0.6 m Length of fin = 7 cm Diameter of fin =…
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A: Given: L = 150 cm t = 4 mm Di = 85 cm Do = Di + 2t = 85 + 8 = 93 cm thermal conductivity, k = 167…
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Q: Fins are used to improve heat transfer by increasing the effective * surface area TRUE O False O
A: Hi. as you have posted multiple questions and not specified which question needs to be solved, we…
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A: Given:Qf=6 Wε=3η=0.75
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A: Givan Data :- Dp =3cm Tw=85°C Tinf = 22°C Dfins = 8cm
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Q: 3- Compare the value between the the actual heat transfer rate Qactual for the surface with fins and…
A: “Since you have asked multiple question, we will solve the first question for you. If you want any…
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A: Given:Inside radius,r=5 cm=0.05mOuter radius,R=10 cm=0.10 mThermal conductivity,K=0.5WmKInside…
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A: Arrangement 2 will have higher heat transfer rate.
Heat Transfer
Consider a infinitely long pin fin with uniform Ac cross sectional area
Write ef effectiveness and Af efficiency
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- Blowtorch is used to connect the two pipes together. Length of the pipe section shown is 150 cm with an inner diameter of 85 cm. The thickness of the pipe wall is 4 mm. The conductivity of the pipe section is 167 Wim^2K. Environment has a temperature of 30 C and convective heat transfer coefficient of 28 WI(mC), find the required heat transfer to join the pipe sections at 220 C? HINT: Assume that the welding section is the base plate and the pipe is 1D extended surface (fin) symmetric about the torch melting line. Heat transfer happens by conduction along the pipe thíckness in horizontal direction and by convection to the environment. Length thickness Torch melting line 200 W 275 W none 314 W 453 WBlowtorch is used to connect the two pipes together. Length of the pipe section shown is 80 cm with an inner diameter of 70 cm. The thickness of the pipe wall is 3 mm. The conductivity of the pipe section is 177 W/m^2K. Environment has a temperature of 25 C and convective heat transfer coefficient of 20 W/(mC) , find the required heat transfer to join the pipe sections at 220 C? HINT: Assume that the welding section is the base plate and the pipe is 1D extended surface (fin) symmetric about the torch melting line. Heat transfer happens by conduction along the pipe thickness in horizontal direction and by convection to the environment. Length thickness Torch melting lineThe steel pipe has an internal radius of 50 mm., a thickness of 5 mm. and a length of 5 m. Inside the pipe, hot fluid with temperature 80 C flows inside the pipe and cold fluid with temperature 20 C flowing outside the pipe. Let k=285 W/mC and hi= 25 W/mC, ho= 10 W/mC. Find 4.1) Heat Transfer Rate (Q) 4.2) Temperature on both inner and outer tube surfaces...
- A large condenser (heat exchanger) in a power plant must transfer a total of 100 MW from steam running in a pipe to sea water being pumped through the heat exchanger. Assume the wall separating the steam and seawater is 4 mm of steel, conductivity 15 W/m K and that a maximum of 5°C difference between the two fluids is allowed in the design. Find the required minimum area for the heat transfer neglecting any convective heat transfer in the flows.A large condenser (heat exchanger) in a power plant must transfer a total of 100 MW from steam running in a pipe to sea water being pumped through the heat exchanger. Assume the wall separating the steam and seawater is 5 mm of steel, conductivity 16 W/m K and that a maximum of 3.5°C difference between the two fluids is allowed in the design. Find the required minimum area for the heat transfer neglecting any convective heat transfer in the flows.For steady state heat conduction in a composite wall (As = 5 m², LA=1 cm and LB =2 cm) as shown in below figure. Calculate the total thermal resistance and the rate of heat transfer from the wall also find the temperatures Ts1, Ts2 and Tc To,z=200°C h₂=10W/m².K KA=0.1 W/m-K T5,1 HL-L₂ 17 Tc Too,2 = 40°C h₂-20W/m².K k=Q04 W/m-KBlowtorch is used to connect the two pipes together. Length of the pipe section shown is 95 cm with an inner diameter of 65 cm. The thickness of the pipe wall is 2.5 mm. The conductivity of the pipe section is 157 W/m^2K. Environment has a temperature of 20 C and convective heat transfer coefficient of 25 W/(mC) , find the required heat transfer to join the pipe sections at 220 C? HINT: Assume that the welding section is the base plate and the pipe is 1D extended surface (fin) symmetric about the torch melting line. Heat transfer happens by conduction along the pipe thickness in horizontal direction and by convection to the environment.
- A long copper fin (k 380 W/mK), whose length is 610 mm and diameter 6 mm is subjected to an environment, where the heat transfer takes place. The heat transfer coefficient is 20 W/m?k. Find the efficiency of fin.Blowtorch is used to connect the two pipes together. Length of the pipe section shown is 150 cm with an inner diameter of 85 cm. The thickness of the pipe wall is 4 mm. The conductivity of the pipe section is 167 W/m^2K. Environment has a temperature of 30 C and convective heat transfer coefficient of 28 WI(mC), find the required heat transfer to join the pipe sections at 220 C? HINT: Assume that the welding section is the base plate and the pipe is 1D extended surface (fin) symmetric about the torch melting line. Heat transfer happens by conduction along the pipe thickness in horizontal direction and by convection to the environment. Length thickness Torch melting lineA slender rod of length L, diameter d (L >> d) and thermal conductivity k1 is joined with another rod of identical dimensions, but of thermal conductivity k2, to form a composite cylindrical rod oflength 2L. The heat transfer in radial direction and contact resistance are negligible. Find the effectivethermal conductivity of the composite rod.
- The heat flow per unit length of a thick cylindrical pipe is 772 W per meter. The pipe has radii ri = 12 cm, ro = 24 cm, outside surface temperature, To = 95 deg C and k = 0.05 + 0.0008T where T is in deg C and k is in W/(m K). Find the inside surface temperature of the pipe, assuming steady state conditions and accounting for the variation of thermal conductivity with temperature. Also determine the temperature of a point midway to the inside and outside radius.Using a 130 cm- long lead pipe with 2 cm inside diameter, a liquid water is transferred at 4 degrees Celsius. Its outside diameter measures 3 cm and the temperature of air outside is 20-deg C. The inside wall of the said pipe has a temperature of 8 degrees Celsius. Solve for: Outside area as basis, find (U) overall heat transfer coefficientA metal rod 1 sq.in in cross section and 6 in long heated at one end and cooled at the other. If the rate of heat input is 3BTU/hr and the difference in the temperature of the two ends is 2oF. Find: a. coefficient of thermal conductivity, W/m-K.