The problem was solved tp verify the performance by doing the calculations in the image. Redo the same problem, but by changing the design either to a Cylinder or Cube from Spherical.
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The problem was solved tp verify the performance by doing the calculations in the image. Redo the same problem, but by changing the design either to a Cylinder or Cube from Spherical.
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- A liquid food is heated in a tubular heat exchanger. The inside pipe wall temperature is 110°C. The internal diameter of the pipe is 30 mm. The product flows at 0.5 kg/s. If the initial temperature of the product is 7°C, compute the convective heat-transfer coefficient. The thermal properties of the product are the following: specific heat = 3.7 kJ/[kg°C], thermal conductivity = 0.6 W/[m °C], product viscosity = 500 x 10^-6 Pa s, density = 1000 kg/m³, product viscosity at 110°C = 410 x 106 Pa s. The length of the heat exchanger is 1m.5. The total head of a fan is 185 m and has a static efficiency pressure of 210 mm of water gage.What is the velocity of air flowing if the density of air is 1.15 kg per cubic meter? 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…A Thomas meter is located in an air duct of 2 sq ft cross-sectional area. The air weighs 0.083 lb per cu ft, and its specific heat is 0.24. Assume a controlled temperature differential of 5° and heater potential of 110 volts. Plot the velocity as abscissa and amperage as ordinate for veloc- ity 0 to 300 ft per min. Assume constant amperage of 3, and plot tem- perature difference against velocity. Discuss the curves from the stand- point of accuracy of the system.
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- You have mounted 100W PCBs as vertical fins. The fins are 60mm deep x 60mm high x 1mm thick and made of G10 (k = 5W/mK). The fins are spaced 6mm apart (pitch = 7mm). (Air temperature = 40oC, B = 0.017) Properties of Air: k = 0.025 W/mK, Pr = 0.72, v = 1.847 x 10−5, u = 16.84 x 10−6, p = 1.2 kg/m3, B = 1/Tf (ideal gas), TInfinity = 25oC a) What is the Rayleigh number? b) What is the Nusselt number? c) What is the convection coefficient?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 What is the heat transfer coefficient (Btu/hr-ft^2-K) if the flowrate is 2000 lb/hr?a. 280b. 208c. 203d. 282A steam generator generates flue gas at an average temperature of 260 C inside a Chimney. The theoretical draft is 0.5 kPa and the ambient condition of the air is 21 C and 100 kPa. Assume the coefficient velocity to be 0.30 and the molecular weight of the flue gas is 32. For air-fuel ratio requirements per second of 15, calculate: a. The diameter of the Chimney, meter b. The theoretical draft, cm H₂O
- A batch centrifugal filter having a bowl diameter of 750 mm and a bowl height of 450 mm is used to filter a suspension having the following properties: Liquid, water Temperature, 25°C Concentration of solid in feed, 60 g/L Porosity of cake, 0.835 Density of dry solid in cake, 2000 kg/m' Final thickness of cake, 150 mm Speed of centrifuge, 2000 r/min Specific cake resistance, 9.5 x 1010 ftflb Filter medium resistance, 2.6 x 101Oft-l The final cake is washed with water under such conditions that the radius of the inner surface of the liquid is 200 mm. Assuming that the rate of flow of wash water equals the final rate of flow of filtrate, what is the rate of washing in cubic meters per hour?Completely solve and box the final answers. Write legibly 10. Calculate the static efficiency of a fan if it delivers 1500 cubic feet per minute of air at a static pressure head of 15 cm of water through a duct 15 cm in diameter and discharge through a duct 135 mm in diameter. Consider a fan mechanical efficiency of 81.5% which is measured at 15 degrees C and 15 psi. Assume water at standard condition.2.5-L bench scale bioreactor is used for the production of recombinant P64K protein from Neisseria meningitides. The dimensions for the bioreactor are Dt 12.9 cm, ratio Di/Dt = 1/3 and N = 700 rpm. With the scale up factor of 2.24, determine the impeller tip speed (m/s) for the pilot scale bioreactor based on constant impeller tip speed and constant power consumption per volume. Predict which scale up method might give a higher concentration of P64K, if the demand of dissolved oxygen plays an important role.