In recent decades, desiccant dehumidification has been given much interest in the air conditioning industry area. Compared to the conventional vapour compression air conditioning system, desiccant dehumidification has various advantages, including separate humidity and temperature control. In this paper, the analysis of the Rotary Solid Desiccant Wheel System has been performed. Here, we have studied three diffusion coefficients: Ordinary, Knudsen and Surface diffusion coefficients for Rotary Solid Desiccant Wheel System. Also, the analysis has been performed for three different solid desiccant materials: Silica Gel, Molecular Sieve and Activated Alumina to incorporate and to study the effect of pore size on moisture transport and to examine the impact of Tortuosity factor on moisture transport phenomenon. This analysis can correctly select the best desiccant material suitable for the desiccant dehumidification industry.
Using pre-cooling technique, food products of perishable nature are desired to be conserved from spoiling. Fruits and vegetables and are suggested to be precooled just after harvesting to avoid any food decay. The precooling enhance their storage life and keeps up quality of vegetables and fruits. Thus, an experimental analysis has been carried out to study temperature variation of spherical food product, i.e. mosambi, during the precooling process. In the current study, the effect of three different air velocities, i.e. 4.3, 4.8 and 5.0 m/s, during precooling of spherical food product has been observed in a forced convection environment. Also, determination of the thermophysical properties of the spherical food product for three different radial positions, i.e. XC= 0.042 m (centre), XM= 0.028 mm (middle) and XS= 0.014 m (surface), has been carried out. The effect of different air velocities and different radial positions on temperature profile of food product was detected. It has been noticed that proper choice of cold air velocity can decrease cooling time of spherical food product, hence resulting in energy saving.
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