ONION VENTILATION MACHINE

Diploma In Mechanical Engineering

Onion spoilage during storage is mainly caused by insufficient air circulation, which leads to moisture buildup, heat retention, and rapid deterioration of bulbs. Conventional storage techniques often lack a controlled ventilation mechanism, resulting in high post-harvest losses. To address this issue, an onion ventilation machine is developed to ensure effective airflow throughout the stored onion mass.The machine functions by forcing fresh air through designed air channels using a mechanical blower system. This airflow removes excess humidity and heat produced during onion respiration, thereby creating a favorable storage environment. Continuous ventilation helps suppress microbial activity, delays sprouting, and maintains bulb firmness and weight. The system is designed with low power consumption and simple components, making it suitable for rural and semi-commercial applications. Performance evaluation shows a noticeable reduction in spoilage percentage and quality degradation when compared with traditional storage methods. The onion ventilation machine presents a practical and economical approach to improving storage efficiency, enhancing shelf life, and reducing post-harvest losses in onion handling systems.

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