Steam injection may be dealt with by consideration at a mass and energy balance:- W2 = W, + m, m, :- mass of steam injected in kg into one kg/s of dry air stream. h2 = h, + m,h, Total heat added is calculated by this equation:- Q. = m(hz h) 3- EXPERIMENTAL PROCEDURE:- (in your own words 6-7 sentences) Enthalpy h2 WB2 RH2 DP2 2 Heating & Humidification WB1 DP1 RH1 DB1 DB2 Dry Bulb Temperature (degree C) FIGURE (1) Humidification by steam injection.