Final phase testing and evaluation of the 500 kW direct contact pilot plant at East Mesa

Abstract

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Analytical Modelling of a Spray Column Three-Phase Direct Contact Heat Exchanger

“…From the results, good agreement seem to have been achieved between the analytical model results and the experimental results of Olander et al [27] for all figures. The main reason or the divergence in the results of the dispersed phase from the experimental data is that the devices basically measuring the water (continuous phase) temperature instead of the dispersed (two-phase bubbles).…”

“…The analytical results for temperatures distribution of both dispersed and continuous phases along the spray column in the direct contact heat exchanger are compared with the experimental data given by Olander et al [27] to verify the theoretical model results. According to (42) and (43), only the initial phases temperatures and mass flow rates are needed to obtain the temperature distribution along the spray column, assuming a value for holdup ratio within the range calculated by Golafshani [28].…”

A numerical study on heat transfer characteristics in a spray column direct contact heat exchanger

“…Also in order to reduce the error for the calculation of the mean temperature of the dispersed fluid, Romberg integral ) is used. Figures 3 and 4 present the temperature measured throughout the 500kW spray column (Olander et al , 1983) and the one-dimensional result of Jacob and The results show that where the aspect ratio is relatively small, the temperatures of the two fluids change rather rapidly and the temperature difference of the two fluids becomes large between the inlet and the outlet of the column. These results indicate that the formation of uniform flow within the column has an advantage to improve heat transfer rates especially at smaller aspect ratios, where the temperature difference between the outlet temperature of'the dispersed fluid and that of the continuous fluid is small.…”

“…Coban and Beohm (1986) calculated the temperature of a continuous fluid with a one-dimensional steady state flow model. Stamps et al (1986) developed a heat transfer model for a liquid-liquid spray column employing a one-dimensional dispersion model. Kim and Jacobs (1986) investigated numerically spray column direct contact heat exchangers by using a continuous phase two-dimensional axisymmetric flow model.…”