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Large Scale IOT Based Green House Dryer

Mrs.V.SELVAM 1, PALANIMUTHU T 2, VIDHYADHARAN G 3 , SIVASUNDAR M 4
1Assistant Professor, Department Of Mechanical Engineering & Kongunadu College Of Engineering And
Technology. Trichy
2Department Of Mechanical Engineering & Kongunadu College Of Engineering And Technology. Trichy
3Department Of Mechanical Engineering & Kongunadu College Of Engineering And Technology. Trichy
4Department Of Mechanical Engineering & Kongunadu College Of Engineering And Technology. Trichy
necessitate the development of more efficient and
controlled drying systems.

Abstract - Enhancing the shelf life of agricultural products is a critical requirement, and solar greenhouse dryers play an important role in achieving this through efficient drying methods. The present work focuses on improving the performance of a greenhouse dryer by integrating latent heat storage using phase change materials (PCM) and forced air circulation. A modified Quonset greenhouse dryer was designed and evaluated using tomato slices as the test crop. Experiments were conducted under solar greenhouse drying conditions with the integration ofPCM and a forced air circulation system to enhance the  drying performance. The experimental results showed that the modified Quonset greenhouse dryer provided effective drying and improved moisture removal compared with conventional solar drying methods. Furthermore, the combined drying configuration consisting of forced air circulation and PCM improved the overall drying efficiency by approximately 38% when compared with conventional greenhouse drying. The results demonstrate that integrating latent heat storage and forced air circulation significantly enhances the performance of the modified Quonset greenhouse dryer, making it a promising and sustainable solution for efficient drying of agricultural products. Solar greenhouse drying has emerged as a promising alternative that utilizes renewable solar energy to create a controlled drying environment. In greenhouse dryers, solar radiation enters through a transparent covering and is trapped inside, resulting in a rise in internal temperature due to the greenhouse effect. This elevated temperature enhances the moisture removal rate and improves drying efficiency compared to conventional methods. Among various greenhouse configurations, the modified Quonset structure has gained attention due to its simple design, efficient solar heat absorption, and improved airflow distribution. The incorporation of advanced features such as forced air circulation further enhances heat transfer and moisture removal. Additionally, integrating phase change materials (PCM) enables thermal energy storage, allowing the system to maintain favorable dryingconditions even during low solar radiation periods.
Key Words: Modified Quonset, Forced air circulation, Phase change materials (PCM), Agricultural products, Solar greenhouse dryer.