12/1/2023 0 Comments Swamp cooler dew point chartSo, the interest in evaporative cooling systems is globally on the rise .Īn evaporative cooling system works based on the difference between the wet and dry bulb temperatures of the ambient air. Furthermore, evaporative cooling systems have lower capital, maintenance and operational costs than MVC systems, which, in turn, make them more attractive economically. Furthermore, most of the working fluids used in MVC systems are harmful for environment, while evaporative cooling systems use water, which is environmentally benign. Although MVC systems can provide lower temperatures than evaporative coolers and are capable to operate in hot and humid conditions, they consume more electrical power than evaporative coolers. Mechanical vapor compression (MVC) and evaporative cooling systems are used in dwelling applications. Key words: evaporative cooling / air conditioning / air humidity / energy saving The sensitivity analysis reveals that further improvements to the performance of the system is possible through increasing of the overall heat transfer within the indirect heat exchanger and increasing of the direct evaporative cooling efficiency. The results are discussed to find the parameters with more significant effects on the performance of the system. The sensitivity of the performance of the system to the temperature and humidity of the ambient air, efficiency of the direct evaporative pads and overall heat transfer coefficient of the heat exchanger were calculated. The numerical results are then compared with the experimental data reported in the literature to establish confidence in the model. The governing equations of the energy and mass are presented and solved simultaneously. The outlet air from the conditioned space is also cooled down, prior to cooling the inlet air, through a second evaporation process. In this system, the temperature of the inlet air into evaporative pads decreases through indirect heat exchange with the outlet air stream from the conditioned space, using an unmixed heat exchanger. * e-mail: the present study, a mathematical model of a two-stage evaporative cooling (TSEC) system is presented, which consisted of two direct evaporative coolers and a heat exchanger. Mohammad Jaafarian * and Mohammad Ehsan Kazemianĭepartment of Mechanical Engineering, Bam Higher Education Complex,
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