In a duct of uniform cross section only static pressure remain constant the total pressure decrease along the length only the dynamic pressure remain constant static pressure increase along the length O velocity reduction method is used for very simple layot duct O very large layot duct O simple and large duct O all of the above O
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- A gasoline engine is at a location where the temperature is measured to be 14.8 °C and produces 300 kW at 5800 rpm while consuming 0.0184 kg/s of fuel. During operation, data shows that its mechanical energy loss is 18 %, the actual volume of air going into each cylinder is 80% (the volumetric efficiency has a negligible variation), and the actual fuel-to-air ratio is 0.065. What were the engine parameters at sea level conditions if the pressure here is 99.3 kPa and the temperature here is 18 0C hotter than that of the elevated condition? Determine at sea-level conditions the Brake Power in kW.A gasoline engine is at a location where the temperature is measured to be 14.2 °C and produces 347 KW at 5800 rpm while consuming 0.0184 kg's of fuel. During operation, data shows that its mechanical energy loss is 18 %, the actual volume of air going into each cylinder is 80% (the volumetric efficiency has a negligible variation), and the actual fuel-to-air ratio is 0.065. What were the engine parameters at sea level conditions if the pressure here is 100.3 kPa and the temeratur here is 18 Uc hotter than that of the alevated conditions? Determine at sea-level conditions the ISFC in ka/kW-hr Use four (4) decimal places in your solution and answer.A gasoline engine is at a location where the temperature is measured to be 14.2 °C and produces 347 KW at 5800 rpm while consuming 0.0184 kg's of fuel. During operation, data shows that its mechanical energy loss is 18 %, the actual volume of air going into each cylinder is 80% (the volumetric efficiency has a negligible variation), and the actual fuel-to-air ratio is 0.065. What were the engine parameters at sea level conditions if the pressure here is 100.3 kPa and the temeratur here is 18 Uc hotter than that of the alevated conditions? Determine at sea-level conditions the ISFC in ka/kW-hr
- 6. Hot water flows through a horizontal steelpipe with diameter (0.25 m) the watervelocity is 5 m/s. The properties of water arep=300 kg/m3 p=3x10-2 kg/m: s. TheReynolds number isO 12000O 12500O 11500O 13500The capillary pressure for a channel of round cross section can be expressed as a function of the surface tension, the contact angle and the channel radius (the numerical factor is 2). Assume a transition of two coaxial channels of constant round cross sections. The larger one has a diameter of 2 mm and a contact angle of 80 degree, the narrower one a contact angle of 125 degree with the liquid. Calculate the other radius required so a liquid segment having one of its two menisci within either segment experiences a counter pressure of 15 mbar.A thermometer is being designed for a process in which the temperature varies from 0 to 180 °C; from experience it is known that the process temperature, when it gets out of control, reaches up to 240 ° C. Considering that only the bulb is in contact with the part inside the equipment, what should be the volume of the safety vial? It is known that the bulb has a length of 1.2 cm and a diameter of 0.5 cm; the capillary has a length of 20 cm and the scale of the thermometer is -10 to 190 ° C. Consider that the coefficient of volumetric expansion for mercury is 1.82×10−4 ° C− 1
- 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 the stack necessary for a driving pressure of 0.20 KPaKindly answer all please. Thank youConsider a pipe on a horizontal plane: based on Bernoulli's equation A. none of the above B. the inlet velocity will be less than the outlet velocity C. the inlet velocity will be greater than the outlet velocity D. the elevation of the inlet will be greater than that of the outletSelect the letter of the correct statement. Write the answer with calculations, drawing, rules or explanation 2-) A scientist suggests the following correlation be used for square tubes in a liquid cross-flow situation (Nu = 0.102 Re0.675 Ppl/3). Water (k = 0.61 W/m.K, Pr= 6) flows across a 1-cmsquare tube with a Reynolds number of 10,000. The convection heat transfer coefficient is:(A-) 5.7 kW/m?.K(B-) 8.3 kW/m?.K(C- ) 11.2 kW/m?.K(D-) 18.1 kW/m?.K.
- A cylindrical tank shown below has a radius ? and a circular orifice at the bottom of radius ?. At time ? = 0 the liquid level in the tank is ho. (a) Use the Bernoulli equation to determine the relations between the orifice velocity ?o and the free surface velocity ?s (assume the surface velocity is not zero). (b) Use conservation of mass to determine the orifice velocity in terms of the free surface velocity. (c) Use the results in (a) and (b) to derive a differential equation for h(?). Note that ?s = − dh/dt. d) Separate variables and solve the equation for h(?) with the initial condition h(0) = ho (e) Determine how long it will take to empty the tank.350 pipes are fixed as square in a pipe bundle used for condenser. PipeThe outer diameters are 8 mm and the steam at 0.2 bar is desired to be condensed on the pipes. pipe outer The surface temperature is kept constant at 30 °C. If the length of the pipes is 1.5 m, the heat transferred in the systemCalculate the amount of energy and the amount of condensed steamConsider the shock tube with the given dimensions in the Figure 1 where both driver and driven gases are air. Initially the pressure ratio between driver and driven sections is p4/p1 = 9. Temperatures of the related sections are given as T1 = 288 K and T4 = 300K. Initial pressure at driven section p1 = 0.05 atm. At t=0, diaphragm located in the center of the tube is broken. For the given values: Draw the local gas velocity, pressure and temperature versus distance graphs at a given time instant t = 0.02. Mark the important points and values corresponding to that points.