Air at $0\backslash$deg C and $95\%$ relative humidity has to be heated and humidified to $25\backslash$deg C and $40\%$ relative humidity by the following three processes:$($a$)$ preheating; $($b$)$ adiabatic saturation in a recirculated water air$-$washer; and $($c$)$ reheating to final state.Calculate: $1.$ The heating required in two heaters; $2.$ The makeup water required in washer and temperature of washer. Assume effectiveness of washer as $80$ percent.$[$Ans$.27\mathrm{.}3$ kJ$/$ kg of dry air, $9$ kJ$/$ kg of dry air; $4\mathrm{.}1$ g $1$ kg of dry air; $12\mathrm{.}6\backslash$deg C$)$