2. Experimental work
According to Fig. 1, the flow sheet design consists of a column with two chimney trays and two Nye trays. Three sight glasses are included in the column for facilitating the hydrodynamic phenomena observation over the trays. The air is blown by a blower through the column and water is pumped by a pump from a storing container inside the column to measure the water flow rate by a calibrated flow meter. Given the studied air/water system, the air outlet effluents to the surrounding. Inlet downcomer of the upper Nye tray, is filled with rings. Table 1 represents the specifications of the trays. Besides, the gas velocity is measured utilizing a calibrated pitot tube located at the blower’s exit and a chimney tray placed under the test tray gathers the liquid weeping from the test tray then it is brought back to the tank. The height of the separator baffle is crucial for determining the liquid wept from two halves of the tray. To prevent any effect on the gas distribution, the height of the separator baffle must be lower than the chimney caps, as well as it must prevent from overflowing between two sides [33, 34].
The comparison between the experimental data and numerical predictions was limited to the relatively restricted set of available computational power and experimental data in the literature. In this regard, the current experimental data can be useful for the readers concerning Nye trays.