Study The Absorption And Regeneration Of Desiccant Material

Chua, Lian Kai (2018) Study The Absorption And Regeneration Of Desiccant Material. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Desiccant drying has been widely used in many industries such as shoes, food, flower and many more in the whole world. It can absorb water molecule and maintain at very low humidity for the aim to preserve the item or product for storing a longer period. Mixed mode Solar and Desiccant Dyer is designed to have both drying ability by using solar energy during the day while desiccant material continues the drying process at the night to improve the efficiency and improve drying rate of the product. This system has been constantly developed in the last few years to acquire better effective results and drying performance. The efficiency of the performance of a solar and desiccant dryer is an essentially depends on the temperature and humidity inside the drying chamber. There is various type of desiccant dryer have been developed and are classified based on the type of desiccant such as liquid desiccant flowing system, solid wheel desiccant dryer and solid recycle drying chamber. Therefore, in this study mixed mode dryer integrated with desiccant material been developed have been used to study the performance of the desiccant material. Solid desiccant that been chosen which is the silica gel are very attractive to water molecule and can absorb up to 30% of its own weight depend on which types of silica gel used. On the other hand, silica gel also can be regenerated naturally under certain temperature produce by the hot sun. It can be reused, and it is a kind of renewable source for drying products. Moreover, silica gel acts as a drying agent in agriculture field nowadays, to optimize the performance of the silica gel. Experiments need to be carried on for the optimization the ability of silica gel in drying process. In addition, data collected form the results by using Anemometer had been calculated to plot the temperature and humidity profile and analysis the trend of the performance. In results of the finding, the higher the temperature in the closed system, the lower the ambient air humidity, then will affect the drying rate to be higher throughout the whole drying process. On the other hand, regeneration requires a high and constant heating temperature, low surrounding air humidity, and a constant air flow to obtain the optimum regeneration rate for the silica gel

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