Asimple brayton cycle operates with air with minimum and maximum temperatures 27◦c and 900◦c. it is designed so that the maximum cycle pressure is 1400 kpa and the minimum cycle pressure is 100 kpa. determine the temperature, pressure and specific volume at the inlet and outlet of the compressor and the inlet and outlet of the turbine. find the heat supplied, heat rejected, work done by the system, work done on the system, net work done, and thermal efficiency. if the mass flow rate is 150 kg/s, find the power output.

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.