An ideal Brayton cycle with regeneration has a pressure

ratio of 10. Air enters the compressor at 300 K and the

turbine at 1200 K. If the effectiveness of the regenerator is

100 percent, determine the net work output and the thermal

efficiency of the cycle. Account for the variation of specific

heats with temperature.

Community Answer

Step 1Given data:*The pressure ratio of the cycle is r=10.*The initial temperature of the air is T1=300 K.*The temperature of the air when reaching at turbine is T3=1200 K.*The effectiveness of the regenerator is 100 percent. The enthalpy and relative pressure of the saturated air at the entrance of the compressor obtains from the steam table.At 300 K.h1=300.19 kJ/kg.P1=1.386 Pa.Thus, the relative pressure at the combustion chamber is,{:[P_(2)=r xxP_(1)],[=10 xx1.386Pa],[=13.86Pa]:}Thus, the enthalpy of the air at state 2 is,h2=579.89 kJ/kg. The enthalpy and relative pressure of the air at state 3 obtains from the turbine ... See the full answer