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A two shell pass and four tube pass heat exchanger is used to heat glycerine from 20 °C to 55 °C by hot water that enters a thin-walled 22 mm diameter tube at 85 °C and leaves at 42 °C. The total length of the tube in the heat exchanger is 40 m. The convection coefficient on the shell side is 23 W/m2-K and on the water (tube) side is 157 W/m2-K. Calculate the rate of heat transfer (W). Assume the inner and outer diameters are equal for a “thin-walled” tube. In other words, conduction through the tube wall is negligible. ?
a barometer is used to measure atmospheric pressure contains mercury with a density of 13590 kgm3. if the local
what are azeotropic and non azeotropic mixtures? explain in brief their advantages giving examples? determine the
Express 310 kPa in mm-Hg (millimetres of mercury). (Calculate this using SGHg = 13.6.) Blood pressure that is below about 120/80 mm-Hg is often considered normal. What do these two numbers indicate? Are these absolute pressures or gage pressures?
At the beginning of the compression stroke, the volume of a certain diesel engine cylinder is 1.000 liter and it is filled with air at 300 K and 100 kPa absolute. At the end of the compression stroke the air is at 800 K and 4280 kPa absolute.
Determine the normal force R between the wheel and the horizontal surface. Neglect the weight of the horizontal shaft.
1. an employee at general electric must order bottles of compressed methane to run her gas oven test facility. the
Using the required parameters for a typical large size car* and an appropriate frontal Quarter-Car model.
a closed rigid container contains water at 100 degrees celcius 70 quality. the volume of the container is 0.2m3. the
A helical compression spring made from hard drawn wire needs to be designed to fit inside a 50mm cylindrical cavity and there must be enough space inside the coils for a 20mm cylindrical guide rod.
Consider laminar flow of a fluid through a square channel with smooth surfaces. Now the average velocity of the fluid is doubled. Determine the change in the head loss of the fluid. Assume the flow regime remains unchanged.
a 50 kg crate resting on a flat smooth surface is acted upon by a horizontal force that varies by the equation f1.5x
Steam enters a diffuser at 20 psia and 240oF with a velocity of 900 ft/s and exits as saturated vapor at 240oF and 100 ft/s. The exit area of the diffuser is 1 ft2. Determine (a) the mass flow rate of steam and (b) the rate of entropy generation.
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