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A typical hydrocarbon fuel produces 43,000 kJ/kg of heat when used in a spark ignition engine. Determine the compression ratio required for an ideal Otto cycle to use 0.035 grams of fuel to produce
Assume that the ends of the bar have been kept at 100 degrees C for a long time. Then at some instant, call it t=0, the temperature at x=L is suddenly changed to 0 degrees C and kept at 0 degrees C,
The ideal Rakine cyle has: Steam leaves the boiler at 800psia and 1000F. the turbine exit is at 1.276 psia with a quality = .95. Estimate the heat rejected (Btu/lb) in the condenser.
A four cylinder spark ignition engine has a compression ratio of 10.5 and each cylinder has a maximum volume of 0.4 L. At the beginning of the compression process, the air is at 98kPa and 37 degrees
The Salt Flats west of the Great Salt Lake make a great racing surface. a) Give the chemical formula for the mineral that is the primary ingredient in this fast surface. b) The electron transferred
Calculate the circulation rate (kg/s) to achieve 1 ton of refrigeration. 1 ton = 3.156 kW. Determine the Quality (%) of the r134a entering the evaporator.
Compare the thermal efficiency of a two-stage gas turbine with regeneration, reheating, and intercooling to that of a three-stage gas turbine with the same equipment when
Agas turbine plant operates on the regenerative Brayton cycle with two stages of reheating and two stages of intercooling between the pressure limits of 100 and 1200 kPa. The working fluid is air.
What is the maximum gauge pressure in the odd tank shown in the figure? Where will the maximum pressure occur? What is the hydrostatic force acting on the top (CD) of the last chamber on the right
A missile with a conical nose cone with a semivertex angle of 16 deg is flying through sea level air at a speed of 817 m/s and an angle of attack of 0 deg. What is the pressure on the surface of the
A two-phase liquid-vapor mixture of H2O has a temperature of 300oC and occupies a volume of 0.05 m3. The masses of saturated liquid and vapor present are 0.75 kg and 2.26 kg, respectively.
The compressor turbine of a simple gas turbine each have isentopic efficiencies of 90%. The compressor pressure ratio is 12. The minimum and maximum temperatures are 290K and 1400K, respectively.
If the friction force on the side walls can be neglected because of their small area compared to the top and bottom walls, what is the net pressure force acting on CV ?
Ignoring the heat transfer, changes in potential energy, and the kinetic energy in inlet, calculate (a) The power output from this turbine, in kW. (b) The cross-section area of the exit, in m2.
Five kilograms of water, initially a saturated vapor at 100 kPa, is cooled to saturated liquid while the pressure is maintained constant. Determine the work and heat transfer for the process, each i
A fluid (viscosity=10^-2 Ns/m2, density =800 kg/m3) flows with a mean velocity of 4 cm/s in a 10 cm smooth pipe. What is the shear stress at a radial distance of 25 mm from the center of the pipe?
A section of a roller-coaster is a horizontal cylindrical helix. The velocity of the cars as they pass point A is 15 m/s. The effective radius of the cylindrical helix is 5 m and the helix angle is
A steam turbine operates steadily under the following condions. At the inlet, p=2.5Mpa, T=450 degrees C, and V=40 m/s. At the outlet p=22Kpa, T=70 degrees C, and V=225 m/s.
A composite wall is to be constructed of 1/4 inch stainless steel (k=10.5 but/hr-ft-degrees F), 3.0 inches of corkboard (k=0.027 same units), and 1/2 inch of plastic (k=1.4); What is the individual
The fuel is consumed at a constant rate q = dm=dt and is expelled at a constant speed u relative to the rocket. Derive an expression for the velocity of the rocket at time t, neglect the resistance
Explain the differences between the plane stress fracture toughness and the plane strain fracture toughness. For a ductile metal, which fracture toughness has a higher value and why?
Find the mass flow rate of the air through the handler, m dot_a, in lbm/hr. The electric power consumed by the compressor assuming a 100% efficient electric compressor motor.
Determine (a) the components of the force F exerted by the blade on the stream, (b) the velocity V for which the maximum power is developed.
In many countries in South America, chunks of cassava root containing 65 percent water are dried to 5 percent water, then ground to make tapioca flour.
What power must the pump deliver to the fluid if the pipeline is made of: (a) drawn tubing; (b) commerical steel; (c) galvanized iron; (d) PVC plastic. chemical engineering fluid mechanics second ed