Define: a. Convection heat transfer coefficient b. Loss of pressure across the tube arrangement *)Based on image below:
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A: introduction: here we solve only first three question:
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Q: can you please give me an analysis of heat transfer in heat exchangers as like a text ?
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- Repeat Problem 11.2-14 using L = 12 ft, ß = 0.25 kips/in., ßRl= 1.5ßL2, and ßR2= 2 ßR1.Solve the preceding problem for a welded Tank with a = 62°,r = 19 irM = 0.65 in.,p = 240 psu E = 30 X 106 psi, and v = 0.30Using T = 45kN - m . (Gst - 77 GPa and Gal 27 GPa ) Evaluate Shear Stress (Maximum ) in Aluminium and shear stress (maximum) in steel.
- An AISI 1035 CD steel tube has an OD = 45 mm and a wall thickness of 5 mm. What maximum external pressure can this tube withstand if the largest principal normal stress is not to exceed 80 % of the minimum yield strength of the material? Assume ?? = 0.The work cylinder of a hydraulic system is acted by a hydraulic pressure of 400 psi while the maximum load of the piston is 6000 lbs. if the allowable tensile stress is 2300 psi, what is the required wall thickness of the cylinder. a.0.510 in. b.0.448 in. c.0.420 in. d.0. 512 in.Calculate the maximum stress in the steel ring if a copper ring with a thread diameter of 2000 mm and a thickness of 20 mm and a steel ring with an inner diameter of 2000 mm and a thickness of 10 mm are interlocked and heated to 100°C. Scale= 100 GPa, Eçelik= 200 GPa, copper= 16.106/°C, steel= 12.10-6/°C a-) 20 MPa b-) 40 MPa c-) 50MPa d-) 60 MPa e-) 30 MPa
- L=9m W=5kN/m 360 UB 50.7The shaft and the flange of a marine engine are to be designed for flange coupling, in which the flange is forged on the end of the shaft. The following particulars are to be considered in the design: Power of the engine=2.4 MW Speed of the engine 80 r.p.m Permissible shear stress in bolts and shaft = 60 MPa Number of bolts used =6 Pitch circle diameter of bolts=1.6* Dimeter of shaft Find 1.diameter of shaft; 2.diameter of bolts; 3.thickness of flange; and 4.diameter of flange. (25 degrea3. The hydraulic cylinder shown in the figure has a D = 6.7-cm bore and is to operateat a pressure of 11 MPa. With the clevis mount shown in figure for Q. No. 3, thepiston rod should be sized as a column with both ends rounded for any plane ofbuckling. The rod is to be made of forged AISI 1030 steel without further heattreatment.(a) Use a design factor nd = 2.5 and select a preferred size for the rod diameterif the column length is 2 m.(b) Repeat part (a) but for a column length of 51cm.(c) What factor of safety actually results for each of the cases above?
- how did you find the equation for L in step 2 and also why isnt h mulplied by the Area when solving for the total resistance?An aircraft engine develops 150kW at 1500rpm. The engine output shaft is steel which failswhen the shear stress is 160N/mm2.a) If the output shaft is solid, determine a suitable diameter to give a safety factor of three.b) If the shaft is hollow with an external diameter of 50mm, calculate a suitable internaldiameter to give a safety factor of three. Also, determine the percentage saving in weight.A cylindrical steel pressure vessel has hemispherical emd caps. The inner radiuos of the vessel is 24 in anf the wall thickness is constant at o.25 in. When the vessel is presseured to 125 psi determine the following. A. The stresses of the cylinder r and hemispgerical caps. B. Based from the allowable working pressure of the blvessel solved in item a, if the pressure is increased to 250 psi what shall be the uniform thickness of the tank