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The isentropic efficiency of the compressor is 80%, mass flow rate is 2247kg/hr, and I found T2s=533K and T2a=591K. How much power input does this compressor require?
Helium gas enters a nozzle whose isentropic efficiency is 88 percent with a low velocity, and it exits at 15.3 psia, 160F, and 840 ft/s. Determine the temperature and pressure at the nozzle inlet.
The compression and power stroke efficiencies are 90%. Using the provided engine data, determine the charge mass (grams). The cut-off ratio.
A 3-in. diameter rod of copper is to be reduced to a 2-in. diameter rod by being pushed through an opening. The modulus of elasticity for the copper is 17 x 106 psi and the yield strength is 40,000
It is initially at a uniform temperature of 25 °C and is suddenly immersed in a liquid at 150 °C with h = 120 W/m2-°C. Calculate the time necessary for the rod to cool to 120 °C.
Air at 35°C, 105 kPa, flows in a 100 mm × 150 mm rectangular duct in a heating system. The volumetric flow rate is 0.015 m3/s. What is the velocity of the air flowing in the duct and what
Assume that the Mercury 50 operates on an ideal Brayton cycle (no regeneration), and that the working fluid is air with variable specific heat, determine i) the thermal efficiency
A cylinder has 0.1 kg air at 25oC, 200 kPa with a 5 kg piston on top. A valve at the bottom is opened to let the air out and the piston drops 0.25 m towards the bottom.
Steam at 500 kPa, 300C is used to heat cold water at 15C to 75C for domestic hot water supply. How much steam per kg liquid water is needed if the steam should not condense?
Water at 1.5 MPa, 150°C, is throttled adiabatically through a valve to 200 kPa. The inlet velocity is 5 m/s, and the inlet and exit pipe diameters are the same.
The front of a jet engine acts as a diffuser receiving air at 900 km/h, -5°C, 50 kPa, bringing it to 80 m/s relative to the engine before entering the compressor. If the flow area is reduced to
A diffuser, shown in Fig. P6.36, has air entering at 100 kPa, 300 K, with a velocity of 200 m/s. The inlet cross-sectional area of the diffuser is 100 mm2. At the exit, the area is 860 mm2, and the
In a jet engine a flow of air at 1000 K, 200 kPa and 40 m/s enters a nozzle where the air exits at 500 m/s, 90 kPa. What is the exit temperature assuming no heat loss?
A-2-m by 1.5-m section of wall of an industrial furnace burning natural gas is not insulated, and the temperature at the outer surface of this section is measured to be 80 C.
It is suddenly exposed to an airstream of 10 °C with h = 15 W/m2-°C. How long does it take the sphere temperature to drop to 25 °C?
Assuming that the engine is made of iron and has an average thickness of 6.5cm between the combustion chamber and the outside surface, determine the heat transfer rate per unit of wall area when com
Steam at 260 c and 1 atm flow through an 8-in. schedule-80 steel pipe at a rate of 10,000 lb/hr. Estimate the value of h which applies at the inside pipe surface.
An ideal gas Carnot cycle with air in a piston cylinder has a high temperature of 1200 K and a heat rejection at 400 K. During the heat addition the volume triples. Find the two specific heat trans
Assuming the process operates 8500 hours per year, calculate the potential emissions of toluene, tons/year. What kind of a system should be considered to control this stream, and why?
The facility is required to collect all the vented air and route it to a biofilter to control total emissions to less than 30 kg of ethanol per day. Calculate the required control efficiency.
Estimate the concentration (in ppm) and the mass emission rate of NOx (in kg/hr, expressed as NO) if a coal containing 1.5% nitrogen is combusted at 1400 K.
Estimate the nominal size of the smallest SAE Grade 1 standard UNC bolt that will not yield under a tightening torque of 1000 in-lb.
Hoover Dam across the Colorado River dams up Lake Mead 600 ft higher than the river downstream, as shown in Fig. P6.51. The electric generators driven by water-powered turbines deliver 1.2 × 1
A ball is dropped from a height of 1.0m, bounces off the floor and is observed to rise up a maxium height of .8 m. How high will the ball rise after its second bounch.
An exhaust fan in a building should be able to move 5 lbm/s air at 14.4 psia, 68 F through a 1.25 ft diameter vent hole. How high a velocity must it generate and how much power is required to do th