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1 kg of a gas in a piston-cylinder assembly undergoes a Carnot power cycle for which the isothermal expansion occurs at 800 K. The change in specific entropy of the gas during the isothermal compression, which occurs at 400 K is -25 kJ/kg. K. Determine (a) the net work developed per cycle (kJ), and (b) the thermal efficiency.
A piston-cylinder device contains helium gas initially at 145 kPa, 20 degrees C, and 0.5 m^3. The helium is now compressed in a polytropic process (PV^n = constant) to 400 kPa and 140 degrees C. Determine the heat loss or gain during this process.
A non-reacting gaseous mixture with molar analysis of 74.3% N2, 4.3% O2, 7.1% CO2, and 14.3% H2O (g) enters a counter-flow heat exchanger at 800?F and 1 atm with a volumetric flow rate of 5 ft3/s (State 1) and exits at 200?F (State 2). A separate moi..
A 4 cylinder 1.6 liter SI engine has a compression ratio of 10, connecting rod length of 16.8cm, and a crank offset of 4.5 cm. The engine is operating at 3000 RPM and wide open throttle. The exhaust pressure is 100 kPa. The intake valve closes at 20 ..
suppose an external torque t1 is applied to shaft 1 which has polar area moment of inertia j1. gear 1 is mounted on
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.
The joint of a space frame is subjected to four member forces. Member OA lies in the x-y plane and member OB lies in the y-z plane. Assume that F = 170lb. Determine the force F1 acting in OA member required for equilibrium of the joint.
heat in the amount of 190kj is transferred directly from an energy-source at 790k to an energy-sink at 2065k. prove
a fire hose needs to deliver 25 ls of water to a maximum height of 50 m above ground level. a find the stagnation
R134a as a saturated liquid is throttled from 600 kPa to 100 kPa at a rate of 0.8 kg/min in a refrigerator. What is the cooling capacity, in kW, assuming the R134a is a saturated vapor at the outlet of the refrigerator's evaporator?
n2 is described by its state properties of temperature -100 deg c and pressure 10.0 mpa. determine if it is
Estimate the rupture lifetime (in hrs) for some cylindrical component originally 10.5 mm in diameter and 496 mm long that is fabricated from a low carbon-nickel alloy; assume that it is to be exposed to a tensile load of 6300 N at 538°C. The logarith..
A piston cylinder contains 0.25 kg of water initially at 1.4 bar and 0.06 m^3. If 250 kj of heat is transferred to the water while keeping pressure constant:
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