In a gas turbine of a thermoelectric plant a regenerator is usedthat preheats the air before it enters the combustion chamber. Youhave the options of a backflow heat exchanger or a shell heatexchanger and two tube passages. The air leaves the compressor at atemperature of 350 C and the exhaust gases have a temperature of700 C. The mass flow in both cases is 5 kg / sec. The overalltransfer coefficient is 75 w / m2 K. In both cases the area is 18m2. Find the best posible exchanger.
