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A four-cylinder, four-stroke spark-ignition engine operates on the ideal Otto cycle with a compression ratio of 11 and a total displacement volume of 1.8 liter. The air is at 90 kPa and 50°C at the beginning of the compression process. The heat input is 1.5 kJ per cycle per cylinder. Accounting for the variation of specific heats of air with temperature, determine
(a) the maximum temperature and pressure that occur during the cycle,
(b) the net work per cycle per cyclinder and the thermal efficiency of the cycle,
(c) the mean effective pressure, and
(d) the power output for an engine speed of 3000 rpm
A 12-ft^3 rigid tank contains refrigerant-134a at 40 psia and 55 percent quality. Heat is transferred now to the refrigerant from a source at 120 °F until the pressure rises to 60 psia. Assuming the surroundings to be at 75 °F, determine the a) amoun..
a one-dimensional plane wall of thickness 2l100mm experiences uniform thermal energy generation of q dot1000 wm3 and is
it is proposed to heat a home using a heat pump. the rate of heat transfer from the house to the environment is 15 kw.
12 lbm of carbon c reacts with 24 lbm of oxygen o2 to form 22 lbm of carbon dioxide co2 plus an unknown amount of
Helium gas at 119.0 kPa and 329.0 K is located within a cylinder with a piston. Initially the gas occupies 0.4800 m3. While a constant force, F, is applied to the end of the piston so that the pressure inside the cylinder is held constant at 119.0 kP..
Determine the gain error if the circuit is to provide a nominal gain of (a) 5, or (b) 50.
A mixture of propane and butane is fed into a furnace where it is mixed with air. The furnace exhaust leaves the furnace at 343°C, 780.0 mmHg and contains only N2, O2, CO2, and H2O. The partial pressure of O2 in the exhaust is 51.40 mmHg and the part..
The cranks are separated by 4 in. axially and 90° radially, as shown in Fig. 9.46. Find the unbalanced primary and secondary forces and moments with respect to the reference plane shown in Fig. 9.46 at an engine speed of 1500 rpm.
derive an expression for the compressibility of air represented by tau for 1 and isothermal process and 2 for an
Define the main structural characteristics of a pin joint and describe an existing structure where such joints are used and why.
a beam has a solid square cross section of 100mm and is simply supported by two supports 3m apart. calculate the dead
Estimate the diffusion coefficient of carbon tetrachloride into air from the following data recorded in a Stefan-tube experiment with carbon tetrachloride ad oxygen: diameter of tube and its length above liquid surface: 1 cm and 15 cm respectively..
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