Design and Fabrication of Hybrid Air Cooler for Domestic Use

The project titled “Design and Fabrication of Hybrid Air Cooler Using Water Cooler and Air Conditioner Components for Domestic Use” was successfully designed, developed, and tested as a working prototype. The main aim of the project was to create an efficient, economical, and environmentally friendly cooling system by combining the principles of evaporative cooling and vapor compression refrigeration in a single integrated system. From the study and development of the system, it is clearly observed that conventional air coolers and air conditioners have their own limitations. Air coolers are economical and consume less power but fail to provide effective cooling in humid conditions. On the other hand, air conditioners provide excellent cooling performance but consume high electrical power and involve higher installation and maintenance costs. To overcome these challenges, a hybrid approach was adopted in this project. The hybrid air cooler works on a dual-stage cooling mechanism. In the first stage, air passes through water-soaked cooling pads where evaporative cooling takes place and reduces the initial air temperature. In the second stage, the partially cooled air passes over the evaporator coil of the refrigeration system, where further heat is removed using vapor compression principles. This combination significantly improves the cooling efficiency while reducing the load on the compressor. During fabrication and testing of the prototype, it was found that the system provides better cooling performance compared to a conventional air cooler and consumes less power compared to a standard air conditioning system. The experimental results showed a noticeable reduction in temperature and improved thermal comfort in a shorter time duration. The system also demonstrated stable operation under different environmental conditions, making it suitable for domestic applications. The project also highlights important engineering concepts such as thermodynamics, heat transfer, fluid mechanics, and refrigeration systems. The practical implementation of these concepts helped in understanding real-world applications of mechanical engineering principles. In addition, the project provided hands-on experience in fabrication, assembly, electrical wiring, and system testing. Economically, the hybrid air cooler offers a cost-effective solution for households where air conditioning is expensive or not feasible. Environmentally, it helps in reducing energy consumption, thereby lowering carbon emissions and promoting sustainable cooling technology. The system is especially useful in hot and moderately humid regions where conventional air coolers fail to perform efficiently.

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