Such methods would make a significant contribution to reducing energy requirements and harmful emissions to the environment. This method consumes nearly 75% less power as compared to conventional vapor compression systems ( Cerci, 2003). The evaporative cooling method is now being considered an option over conventional vapor compression systems. The cooling requirements for such applications are mainly dominated by mechanically driven vapor compression systems, which are highly energy consuming. The studies also reveal that indoor human thermal comfort is of high priority over visual and acoustic comfort ( Frontczak and Wargocki, 2011). The cooling of buildings has become an important feature in applications such as commercial offices, metro stations, shopping and sports complexes, and industrial units to name a few of them. Out of the total energy consumed in buildings, half of it is utilized for cooling purposes ( Luis et al., 2008). The gross energy requirements for the building sector account for nearly one-third of the global energy requirements and release of carbon emissions. The geometrically modified flow passages increase the heat exchange area for the same volume of a similar heat exchange device and achieve an increased thermal performance of the proposed cooler. The experimental results achieved dew point and wet bulb efficiencies ranging between 52% and 82% and 74% and 126%, respectively. The performance in terms of dew point and wet bulb efficiency is presented based on laboratory trials. The laboratory trials were conducted for the different combinations of intake air temperature, specific humidity, and air velocity. The trapezoidal corrugated plate has been used to form these passages for air and water. Conventionally, these passages are formed by either flat or corrugated plates. The experimental performance of the dew point evaporative cooler has been investigated in the present work with the geometrically modified flow passages for air and water. The satisfactory performance of indirect evaporative cooling techniques (IEC) is governed significantly by the structural and design arrangement of heat and mass exchange devices.

2Aerospace Engineering Department, MIT Art, Design and Technology University, Pune, India.1Mechanical Engineering Department, MIT Art, Design and Technology University, Pune, India.

Swamp cooler dew point chart