86. A waste heat recovery boiler produces 4.8 MPa (dry saturated) steam from 104°C

feedwater. The boiler receives energy from 7 kg/s of 954°C dry air. After passing through a

waste heat boiler, the temperature of the air has been reduced to 343°C. How much steam in

kg is produced per second? Note: @ 4.80 MPa dry saturated, h = 2796 kJ/kg.

A. 1.30 B. 0.92 C. 1.81 D. 3.43