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By: Niket Jalihal and S C Sajjan.
Department of Mechanical Engineering
KLE Institute of Technology, Hubballi -27, Affiliated to VTU, Belagavi, India
This project explores the design of a portable solar water heater optimized for high-efficiency heat transfer in off-grid settings. The system utilizes the superior thermal conductivity of copper turnings, which serve as a heat exchanger to capture direct solar radiation. Using a closed-loop mechanism, a small pump circulates water from a storage tank through these copper coils, where it is rapidly heated before returning to the reservoir.
This active circulation ensures consistent temperature elevation and prevents heat loss associated with passive designs. Compact and lightweight, the prototype provides a sustainable solution for hot water needs in camping or emergency relief scenarios. By combining copper’s material efficiency with a motorized flow, the system delivers a reliable, eco-friendly energy alternative. In addition to its functional design, the proposed system emphasizes affordability and ease of fabrication, making it suitable for deployment in resource-constrained environments. The use of readily available copper turnings reduces material costs while maximizing surface area for heat absorption, thereby enhancing overall thermal performance. The closed-loop configuration also minimizes water wastage and contamination, ensuring hygienic operation even in remote locations.
Citation:
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