The local structural function obtained by a microresistivity probe at different hydrodynamic regimes is examined. The structures, such as the vortex-clinging structure, the appearance of one and two large cavities, small 3-3 structure, large 3-3 structure, and ragged cavities were recognized by frequency transformation of the time-domain structural function. An optimized phase discrimination in signal processing was used. The distribution of the local void fraction (a) in a pilot-size stirred tank was experimental& investigated, because almost no such data can be found in the literature. The two-phase mixture was composed of air and water; a was measured at 190 nodes in the vertical half section plane of the vessel. Relative differences smaller than 9 % between integrated values of a and measured gas holdups agreed reasonably well under all conditions.
In this study, the main goal was to develop an adsorption heat storage system for domestic heating system gained by solar collectors and to indicate a new way of maintaining the energy. Main characteristic of the storage system is to retain the energy for a longer period, as long as the adsorbent and adsorbat are separated. This research analysis the influence of several parameters on the adsorption heat storage system such as: the quantity of the stored heat, the in-and out-flowing water temperatures, the water mass flow and the saturation of the adsorbent. Adsorbent HX-13 sodium aluminosilicate Na 2 O Al 2 O 3 * 2SiO 2 in the form of granule was used.Regarding the results we can be conclude that the low adsorption heat storage is low hydrophilic characteristic of the used adsorbent.
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