Asteam power plant operates on the ideal reheat rankine cycle. steam enters the high-pressure turbine at 8 mpa and 600 oc and leaves at 3 mpa. steam is then reheated at constant pressure to 500 oc before it expands to 20 kpa in the low-pressure turbine. determine: a) the turbine work ouput in kj/kg; b) the thermal efficiency of the cycle (%)

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.