An ideal Otto cycle uses air as the working fluid; its state atthe beginning of the compression is 120 psia and 60°F, itstemperature at the end of the combustion is 1500°F, and itscompression ratio is 9. Use constant specific heats at roomtemperature. Determine the rate of heat addition and rejection forthis ideal Otto cycle when it produces 120 hp. The properties ofair at room temperature are R = 0.3704psia·ft3/lbm·R, cp = 0.240Btu/lbm·R, cv = 0.171 Btu/lbm·R, and k= 1.4.
The rate of heat addition is ____________ Btu/h.
The rate of heat rejection is ___________________ Btu/h.
