A steam power plant receives heat from a furnace at a rate of 280 Gj/h. Heat losses to the surrounding air from the steam as it passes through the pipes and other components are estimated to be about...

A steam power plant receives heat from a furnace at a rate of 280 Gj/h. Heat losses to the surrounding air from the steam as it passes through the pipes and other components are estimated to be about 8 Gj/h. If the waste heat is transferred to the cooling water at a rate of 145 Gj/h, determine a) the net power output b) the thermal efficiency of this power plant.