Fabrication and Analysis of Multistage Evaporative Cooler and Comparison with Single-stage Cooler

Abstract

Nowadays air conditioning has become a vital appliance with increasing the living standard of human beings. However, excessive use of air conditioners (AC) turns into health issues and is also linked to global climatic changes. It has been observed that the effects of climate change increase the use of air conditioners affecting human wellness and sleeping conditions. Literature reveals that AC devices are primarily used in living rooms, bedrooms, offices, and vehicles resulting in Colds, fevers, headaches, and chest pain which are more common. The evaporative cooling technique can be the better alternative to overcome the above-mentioned issues. Evaporative cooling simply employs water as the working fluid to cool air as a result of direct evaporation of water. Evaporative cooling is an energy saving and environmentally-friendly technique that can be used in place of AC. The evaporative cooling technique can significantly lower the amount of energy required for comfort conditions in buildings offering a significant environmental advantage. The conventional evaporative cooler can utilize a few fractions of the wet bulb depression only for cooling the room air, which cannot meet the comfort condition of a conditioned space. The evaporative cooling systems with two stages of continuous cooling can be the solution to meet the said requirements effectively and increase less humidity compare to conventional evaporative coolers. This work deals with the effect of multiple cooling pads on the efficiency of evaporative cooling systems. The result reveals that the two-stage evaporative cooler works more effectively and quietly, to meet the required comfort condition.