Extending the shelf life of fresh agricultural produce has long been a major challenge for farmers. Now, a cost-effective and energy-efficient on-farm storage system is offering a practical solution. This innovative technology is proving to be a game-changer for farmers and agri-stakeholders, enabling them to preserve produce for longer durations and secure better market prices.
Traditional refrigeration-based cold storage systems maintain low temperatures and high humidity, but they come with a heavy price tag. Setting up a one-ton capacity unit can cost between ₹5–7 lakh, along with significant operational expenses. In contrast, this newly developed system offers a low-cost alternative, making it accessible for small and medium-scale farmers.
The storage system is built on a combination of indirect and direct evaporative cooling techniques. With a capacity of one ton, the structure is constructed using hollow bricks for better thermal performance.
The inner walls are insulated with specially designed PU foam and polycarbonate panels, which help minimize heat transfer and maintain a stable internal environment. The system also integrates a cross-flow plate and fin heat exchanger for effective indirect cooling, while direct cooling is achieved using standardized cooling pad media.
One of the key strengths of this system is its operational flexibility. Farmers can run either the direct or indirect cooling system independently, or combine both in hybrid mode for enhanced performance. Field trials have shown that even at peak ambient temperatures of 40°C, the system can reduce the internal temperature to around 18.3°C. This significant cooling improvement helps maintain the quality of stored produce.
A major advantage of this technology is the substantial increase in shelf life. For instance, cucumbers that typically last only 3 days under normal conditions can now be stored for up to 14 days without noticeable loss in quality. This gives farmers more time to plan sales and reduce post-harvest losses.
Low Energy Consumption, Higher Savings:
The total cost of setting up this advanced storage system is approximately ₹3 lakh, which is considerably lower than conventional cold storage units. Moreover, it consumes just 1 kWh of energy per ton, making it highly energy-efficient and economical for farmers.
A Game-Changer for Farmers:
This on-farm storage innovation allows farmers to store their produce safely and sell it at the right time for better returns. It also strengthens the supply chain by reducing wastage and maintaining product quality. With its low cost, minimal energy requirement, and high efficiency, this technology has the potential to transform post-harvest management in agriculture.
FAQs:
1. What is an on-farm storage system?
It is a low-cost storage solution that helps farmers store produce at controlled temperatures directly on their farms.
2. How does evaporative cooling work in this system?
It uses water evaporation to reduce temperature, maintaining a cool and humid environment inside the storage unit.
3. What is the cost of this storage system?
The system costs around ₹3 lakh, which is much lower than traditional cold storage.
4. How much shelf life increase can farmers expect?
Farmers can increase shelf life from 2–3 days to up to 14 days for certain crops like cucumbers.
5. Is this system energy-efficient?
Yes, it consumes only 1 kWh per ton, making it highly energy-efficient and cost-saving.
