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Automatic Solar Dryer

Publication Date : 10/07/2015

Author(s) :

Pallavi D. Dhikale , Yogita B. Wable , Gitanjali B. Jadhav.

Conference Name :
4th International Conference on Recent Trends in Engineering & Technology(ICRTET-2015) July 2-4,2015 Organized by SNJB's KBJ College of Engineering,Chandwad,Nashik,Maharashtra,India

Abstract :

Solar drying is a renewable and environmentally friendly technology. Solar drying can be considered as an advancement of natural sun drying and it is a more efficient technique of utilizing solar energy. Fruits are seasonal crop and get spoilt quickly. To make their usage efficient, they can be dried and preserved so that fruits can be used over a long period. The natural drying process has many drawbacks, such as requiring more time, large investment on space requirement and infrastructure for drying process, which cannot be afforded by a middle class farmer. The financial up gradation of a former in developed countries is possible by providing him the modern, automatic and low-cost fruit drying unit. This project describes a controlled environment which is suitable for small scale fruit drying process within a closed chamber, using Microcontroller. To start with, the sun rays are used to internally heat the fruit to remove the water content within the fruit. Then the air is blown inside the chamber to maintain the humidity below a specified level and exhaust the humid air out of the chamber. Microcontroller is used to control the functions of heating, blowing the air, controlling the speed of exhaust fan and giving time indication & maintain constant temperature throughout the chamber. After the completion of the drying process a buzzer is activated for the duration of ten seconds to indicate the end of the drying process. A text message is also sent to the farmer through GSM to intimate him if he is not around. The graphs of time versus drying process obtained show that the automatic drying unit designed has worked as per the expectation by consuming less time compare to conventional drying process.

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