An air-standard dual cycle has a compression ratio of 14 and a cutoff ratio of 1.2. the pressure ratio during the constant-volume heat addition process is 1.5. determine the thermal efficiency, amount of heat added, the maximum gas pressure and temperature when this cycle is operated at 80 kpa and 20°c at the beginning of the compression. use constant specific heats at room temperature.

Ahot wire operates at a temperature of 200°c while the air temperature is 20°c. the hot wire element is a tungsten wire of 5 um diameter and 2 mm in length. plot using excel current, heat transfer and heat generated by the wire for air velocity varying from 1-10 m/s in steps of lm/s? matlab the sensor voltage output, resistance, or assume nu 0.989 re033pr13 take air properties at tr (200°c20°c)/2 = 110°c properties of tungsten: c 0.13 kj/kg. k 3 p 19250 kg/m k (thermal conductivity) = 174 w/m. k