Parametric Study of M-Cycle Evaporator Cooler

Abstract

Refrigeration and air conditioning systems consume a major portion of the electricity produced. A dew point evaporative cooler was constructed and analyzed on the basis of outlet air temperature and effectiveness by varying the inlet air properties i.e. humidity, temperature and velocity. The wet bulb effectiveness measured in the experiment was between 65 % and 125 %. Whereas the dew point effectiveness ranged from 30 % to 85%. The system was also operated with inlet air being treated by a liquid desiccant dehumidifier for operation in humid climates. The liquid desiccant reduced the outlet relative humidity by 4% to 8%. An improved cross flow HMX (Heat and Mass Exchanger) composed of aluminum sheets coated with felt material sheets were used and the working to product air ratio was fixed at 0.5. The experimental results obtained were compared with the available literature and improved effectiveness was observed. The system provided a viable option to replace the conventional energy intensive mechanical vapor compression system with energy efficient and an environment supportive alternate. The paper focuses on the m-cycle cooler. The M-cycle cooler was manufactured with an improved cross flow HMX (Heat and Mass Exchanger) composed of aluminum sheets with felt sheets. The working to product air ratio was fixed at 0.5. The experimental results obtained were compared with the available literature and improved effectiveness was observed. The wet bulb effectiveness measured in the experiment was between 65 % and 125 %. Whereas the dew point effectiveness ranged from 30 % to 85%. The proposed system provides better efficiency as compared to the literature, the results were discussed with the effect of different variables. Hence the proposed cooler has better effectiveness as the system can be made commercially suitable for medium load applications. An efficient dew point cooler has been developed based upon Maisotsenko cycle. The testing was conducted on different cases (temperature, humidity, Inlet air velocity and dehumidifier). Improved wet bulb and the dew point effectiveness was attained by experimentations. Better effectiveness was observed for the higher relative humidity.