Effect of air velocity and direction for indirect evaporative cooling in tropical area

International Conference on Aerospace, Mechanical and Mechatronic Engineering

航空航天工程;机械制造;无线电电子学

Ajiwiguna, Tri Ayodha^1 ; Rismi, Fadhlin Nugraha^1 ; Kirom, Mukhammad Ramdlan^1

Engineering Physics Department, Telkom University, Jalan Telekomunikasi, Bandung

40252, Indonesia^1

关键词: Air temperature;    Cooling Capacity;    Evaporative cooling effects;    Heat absorption;    Indirect evaporative cooling;    Plate temperature;    Steady-state condition;    Temperature and relative humidity;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/211/1/012022/pdf
DOI  :  10.1088/1757-899X/211/1/012022

学科分类：航空航天科学

来源: IOP

【 摘 要 】

In this research, experimental study of heat absorption rate caused by indirect evaporative cooling is performed by varying the velocity and direction of air. The ambient is at average temperature and relative humidity of 28.7 °C and 78% respectively. The experiment is conducted by attaching wet medium on the top of material reference plate with the dimension of 14 x 8 cm with 5 mm thickness. To get evaporative cooling effect, the air flow is directed to the wet medium with velocity from 1.6 m/s to 3.4 m/s with the increment of 0.2 m/s. The direction of air is set 0° (parallel), 45° (inclined), and 90° (perpendicular) to the wet medium surface. While the experiment is being performed, the air temperature, top and bottom of plate temperature are measured simultaneously after steady state condition is established. Based on the measurement result, heat absorption is calculated by analysing the heat conduction on the material reference. The result shows that the heat absorption rate is increased by higher velocity. Perpendicular direction of air flow results the highest cooling capacity compared with other direction. The maximum heat absorption rate is achieved at 13.9 Watt with 3.4 m/s velocity and perpendicular direction of air.