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An air-standard Otto cycle has a compression ratio of 6. At the beginning of compression, the pressure is 100 kPa and the temperature is 300 K. During the heating process, the temperature is raised to 2500 K. Assume that the cold air-standard assumption applies and determine:
a) the heat added (in kJ/kg)
b) the net work (in kJ/kg)
c) the thermal efficiency of the cycle
d) the mean effective pressure (in kPa)
evaluate and compare the lower heating values per unit mass of stoichiometric mixture and per unit volume of
An 80-mm × 40-mm rectangular beam is made of heat treated AISI 4340. On the tension side of the beam, a transverse crack of length 10 mm is discovered. Determine the magnitude of the bending moment M that will cause brittle fracture.
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the roadster weighs 2750 lb its mass is evenly distributed between its front and rear wheels and it accelerates from 0
determine the minimum time needed for the plate temperature to reach 140°C.
one pound of nitrogen as an ideal gas expands isothermally at 70 f from a volume of 1 ft3 to a volume of 2 ft3. during
design a single stage rocket for mars orbital insertion liftoff from mars. required deltavee3.5 kmsec using
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Saturated liquid steam at 2 MPa steadily enters a valve where it is throttled to 0.3 MPa. The inlet and outlet diameter is 1 cm. The flow rate is 0.012 kg/s. Determine the outlet density [kg/m3] of the steam. Also show that it is reasonable to neglec..
A 15 m/sec wind at 101.3 kPa and 20 degrees Celeus enter a two-bladed wind turbine with a diameter of 15 m. Calculate the following. The power of the incoming wind. The theoretical maximum power that could be extracted
Find the temperature of water at 200 kPa and specific enthalpy of 350 kJ/kg. A heat pump and a refrigerator operate on same cycle between same hot and cool reservoir at temperature TH, and TL, respectively. Please demonstrate = +1 COPHP COPRF and com..
the presence of raindrops in the air during a heavy rainstorm increases the average density of the air-water mixture.
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