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.

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

Atmospheric air has a temperature (dry bulb) of 80° f and a wet bulb temperature of 60° f when the barometric pressure is 14.696 psia. determine the specific humidity, grains/lb dry air. a. 11.4 c. 55.8 d. 22.5 b. 44.1

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.