Solar Dryer for Vegetables | Controlled Batch Dehydration Project

Vegetable drying presents a different processing challenge from fruit drying because the raw material can vary widely in structure, thickness, water content and preparation method. Rudra Solar Energy developed this solar dryer for vegetables project for a processing operation that required an enclosed system capable of handling prepared vegetable batches with organised tray loading and effective air movement. Rather than designing the project around a single fixed drying condition, the system was planned for flexible vegetable processing. Products may require sorting, washing, peeling, cutting, slicing or other preparation before they enter the dryer; these remain separate processing stages. Inside the solar drying system, the focus is on moisture removal through suitable heat and airflow, while keeping the material inside a defined drying chamber instead of directly exposing trays to the outdoor environment. Vegetable drying performance varies according to product type, initial moisture, cut size, loading density, temperature, airflow, humidity, available solar radiation and the required final moisture level. For this reason, operating conditions need to be adjusted according to the vegetable being processed rather than using one universal drying schedule.