Gravity-Based Water Distribution and Recirculation System for Evaporative Coolers Without a Pump

This paper presents a proposed modification to water coolers that aims to eliminate the water pump and reduce electricity consumption and maintenance costs. The system uses a separate elevated cylindrical tank located next to the cooler, allowing water to flow by gravity through hoses connected to the cooling pads and cooler mats. The side tank, which is thirty centimeters below the cooler water tank and twenty centimeters above the cooler surface, is automatically refilled through a float valve connected to the municipal water supply. By placing the outlet above the pads and mats, water distribution is achieved without mechanical pumping. The bottom basin collects excess water and is connected to the bottom of the cylindrical tank next to the cooler through a hose from the bottom valve, and the water in the cooler tank is drained by gravity from the cooler tank and into the cylindrical tank next to it. Of course, we put a one-way valve in the way so that the water circulation system only works in favor of draining the cooler water tank to the cylindrical tank next to it. This design reduces the number of moving parts, simplifies the cooling system, and provides a practical, low-energy alternative for water cooling applications.