Study on Factors Affecting Temperature Difference of Evaporative Cooler Using Condensate from Civil Air Conditioning System

Experimental research on factors affecting air temperature through the model using cooling pads cooled by condensate water was conducted based on the experimental survey of the difference in air temperature before and after leaving the model. Taguchi is a highly reliable statistical testing method, and ANOVA is used to build and analyze databases. In addition, supporting software such as Inventor Professional provides technical solutions in design and 3D modeling, while Minitab software visualizes analytical data. The study has shown the key factors affecting the difference in temperature before and after leaving the cooling device, including the Thickness of the cooling pad (A), the Condensate flow (B), the angle of the cooling pad (C), the time of day (D), and the fan speed (E). After applying the Taguchi method and testing with the ANOVA method, the results showed that the optimal factors for the system's cooling capacity are A1, B1, C1, D3, and E3. With A1: Cooling pad thickness 5cm, B1: condensate flow is 6 liters (divided equally into three sub-troughs, each trough 2 liters of water), C1: Panel angle is 0 degrees, D3: Time of day is afternoon, E3: Fan speed is 5.5 m/s The research results obtained the average air temperature values before and after leaving the model are 32.23°C and 24.47°C respectively. The average air temperature difference AT (<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">∘</sup>C) = 7.77. The testing results indicate that the time-of-day factor (D) exhibits the lowest noise signal and has the most significant influence.