Afour-cylinder, four-stroke internal combustion engine operates at 2800 rpm. the processes within each cylinder are modeled on cold air-standard otto cycle with a pressure of 14.7 lbf/in.2 , a temperature of 80of, and a volume of 0.0196 ft3 at the beginning of compression. the compression ratio is 10, and maximum pressure in the cycle is 1080 lbf/in.2 determine, using a cold air-standard analysis, the power developed by the engine, in horsepower, and the mean effective pressure, in lbf/in.2

Determine whether or not it is possible to compress air adiabatically from k to 140 kpa and 400 k. what is the entropy change during this process?

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?

Estimate the change in specific internal energy au and specific enthalpy h from inlet to outlet for ethylene glycol (a liquid) flowing through each of the following devices: (a) a heat exchanger where the glycol temperature increases from 20 °c to 80 °c; (b) a pump operating at about 25 °c and increasing the glycol pressure from 100 kpa to 8 mpa.