The renewable energy source like solar is been used in this projects to produce more efficiency in a solar dryer. It is one the most reliable energy source and that does not pollute the environment and green house free emission. In this project work we use sunlight to dry the crops and to preserve the dry fruits we are using sunlight. The motivation of the work is to use a solar dryer with phase change material. With the help of PCM we can able to increase the efficiency of solar dryer because of increasing the contact area of the crops with PCM during off sunlight. In this project work we use indirect solar radiation principle because PCM will absorb the solar radiation and that will be emitted during the night time. A absorber plate is used to absorb the solar radiation. Once after receiving the radiation from the sun that is been transferred to the chamber where the crops are been provided. In that chamber we will be having the PCM box that will be in solid state and once after receiving the solar radiation phase change will be taking place from solid to liquid phase. Once the sun starts to set off the solar radiation will not be available so during that time PCM is used to transfer the heat. The moisture present in the crop is been removed with the help of the heated air. With the help of the above information the crop drying process is been evaluated with the help of calculation.

The purpose of this study is to analyze the impact of the material of the spherical capsule on the solidification characteristics of deionized water as the phase change material(PCM) filled with 90% of its fill volume. The experiment was performed with two same sized balls measuring 86mm diameter made of LDPE(Low density polyethylene) and Stainless Steel kept at distinct bath temperatures(-6,-9 and -12°C). It was noticed that the material of the spherical capsule had an influence on the solidification characteristics of the PCM. The Stainless Steel capsule froze significantly faster than the LDPE capsule for all the mass fractions. This effect was prominent in the lower mass fraction of 50%. It was also inferred that the percentage by which the Stainless Steel capsule froze faster than the LDPE capsule escalated by 32.63%, 40.90% and 43.18% at higher potential temperatures for 50% mass fraction.

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