Moist air (dry air and water vapor) at a state of 18 °c dry bulb, 15 °c chamber and for each kilogram of dry air passing through the chamber, 0.001 kg of liquid water at 100 °c is injected and totally evaporated. estimate the moisture content, ω and enthalpy and dry bulb temperature of the moist air leaving the wet bulb at 101 kpa, enters a chamber.

An external consultant recommends that a plant installs a bank of capacitors for power factor correction. this will reduce the peak electrical demand charges by an average of 93 kw every month. the plant current pays $13 per kw in peak demand charges. the capacitor bank will include 223 kw of fixed capacitors, and 183 of variable capacitors. the fixed capacitors cost $59 per kw, and the variable capacitors will cost $65 per kw. the consultant charges 21% of the equipment costs to install the capacitors. because this project will reduce the demand for the electric utility, they are prepared to provide a one-time rebate of $42 per kw of reduced demand. what is the simple payback period for this project (in years)?