Application of the ETT technique for DCHXs

This paper investigates the possibility of applying the EIT(Electrical Impedance Tomographic) technique as a means to reconstruct the image of dispersed phase droplets in a Direct Contact Heat Exchanger (DCHX). Two different cases of the DCHX are considered : 1 ) a case where the fluid (Dowtherm J) lighter than water is injected into the spray column through a perforated plate at the bottom of the column and 2) a case where heavier fluids(Phthalates) stream through the spray column from top to bottom. The paper also introduces theoretical backgrounds of the technique concerning the forward and inverse problems. A number examples are given for the static model in this regard where the assumed image is reconstructed using the techniques. The results so obtained are examined by the experimental investigation which has been carried out using one or two stationery objects (>1012 Ω cm) immersed in a stagnant body of saline water (300 Ωcm)