• M. A. Hakeem
• C. V. Papade

Solar energy is the most reliable energy and in near future, everyone will be depending on it completely due to a lack of resources. The task is to design and develop a compact and more efficient solar water heater that can be affordable to everyone. Current solar water heaters are quite expensive and very bulky as well. There are many kinds of solar water heaters already available in the market offered by various brands they offer a limited supply of water when used for extended periods they can waste up to 15% energy through radiant loss. But what makes this product outstanding is the use of a spiral coil instead of a traditional square design which gives water more time to circulate and heat up quickly. The basic design of our solar water heater can be considered a flat plate collector but as an added feature vacuum is induced in the gap between the spiral coil and glass which makes an amalgamation of the evacuated tube and flat plate collector. And also PCM is used in an insulated tank to make sure water is warm for a long period. By introducing all these small changes and innovations the goal is to achieve a product that is more efficient and cost-effective as well. The design of the current system is to heat 60 liters of water with the help of sun rays within the estimated time which will provide hot water to a maximum of 3 people.

Solar Energy, Spiral Coil Collector, PCM (Paraffin Wax), Thermal Energy Storage, Re-newable Energy.

"Review On Design & Development Of Spiral Coil Type Solar Water Heater System", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.12, Issue 11, page no.d564-d573, November-2025, Available :http://www.jetir.org/papers/JETIR2511360.pdf

"Review On Design & Development Of Spiral Coil Type Solar Water Heater System", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.12, Issue 11, page no. ppd564-d573, November-2025, Available at : http://www.jetir.org/papers/JETIR2511360.pdf