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The rotating solid steel shaft is simply supported by bearings at points B and C and is driven by a gear (not shown) which meshes with the spur gear at D, which has a 150-mm pitch diameter. The force F from the drive gear acts at a pressure angle of 20°. The shaft transmits a torque to point A of TA 5 340 N ? m. The shaft is machined from steel with Sy 5 420 MPa and Sut 5 560 MPa. Using a factor of safety of 2.5, determine the minimum allowable diameter of the 250-mm section of the shaft based on (a) a static yield analysis using the distortion energy theory and (b) a fatigue-failure analysis. Assume sharp fillet radii at the bearing shoulders for estimating stress-concentration factors
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The rotating solid steel shaft is simply supported by bearings at points B and C and is driven by a gear (not shown) which meshes with the spur gear at D, which has a 150-mm pitch diameter. The force F from the drive gear acts at a pressure angle of 20°. The shaft transmits a torque to point A of TA 5 340 N ? m. The shaft is machined from steel with Sy 5 420 MPa and Sut 5 560 MPa. Using a factor of safety of 2.5, determine the minimum allowable diameter of the 250-mm section of the shaft based on (a) a static yield analysis using the distortion energy theory and (b) a fatigue-failure analysis. Assume sharp fillet radii at the bearing shoulders for estimating stress-concentration factors
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(41) Q4 sed 3-23 Calculate Is and the current, I, for V=780mV for a pn junction for which NA=1017cm3,ND=1016cm3, A=20μm2,ni=1.5×1010cm3,Lp=5μm,Ln=10μm,  Dp=10cm2s, and Dn=18cm2s.  Update Note: you can assume that , and the calcelore nse VT=25.9mV. (But show the calculation) Solution

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A finned-tube exchanger is used to heat 2.36 m3/s of air (specific heat of 1006 J/kg C) at 1 atm from 15.55 to 29.44°C. Hot water enters the tubes at 82.22°C and the air flows across the tubes, producing an average overall heat transfer coefficient of 227 W/m2C. The total surface area of the exchanger is 9.29m2. Calculate the heat transfer rate (kw) and the exit water temperature.
A finned-tube exchanger is used to heat 2.36 m3/s of air (specific heat of 1006 J/kg C) at 1 atm from 15.55 to 29.44°C. Hot water enters the tubes at 82.22°C and the air flows across the tubes, producing an ...

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A finned-tube exchanger is used to heat 2.36 m3/s of air (specific heat of 1006 J/kg C) at 1 atm from 15.55 to 29.44°C. Hot water enters the tubes at 82.22°C and the air flows across the tubes, producing an average overall heat transfer coefficient of 227 W/m2C. The total surface area of the exchanger is 9.29m2. Calculate the heat transfer rate (kw) and the exit water temperature.
A finned-tube exchanger is used to heat 2.36 m3/s of air (specific heat of 1006 J/kg C) at 1 atm from 15.55 to 29.44°C. Hot water enters the tubes at 82.22°C and the air flows across the tubes, producing an ...

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In a TEMA – E type shell-and-tube exchanger, as shown in the schematic diagram, water enters the shell at 218 °C at a rate of 1.4 kg/s. Engine oil flows through the tubes at a rate of 1.0 kg/s. The inlet and outlet temperatures of the oil are 150 °C and 90 °C, respectively. Determine the surface area of the exchanger by both the LMTD and E-NTU methods if U = 225W / (m ^ 2) * K The specific heats of water and oil are 4.19 and 1.67 J/g K respectively.
5. In a TEMA - E type shell-and-tube exchanger, as shown in the schematic diagram, water enters the shell at 218 °C at a rate of 1.4 kg/s. Engine oil flows through the tubes at a rate of 1.0 kg/s. ...

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Distilled water at a flow rate of 80,000 kg/hr enters an exchanger at 35C and leaves at 25C. The heat will be transferred to 140,000 kg/hr of raw water coming from a supply at 20C. Distilled water is at the ...

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Sorry it's a private question.