| Abstrakt: |
This research was conducted to know the heat transfer rate in the radiator with the louver fin type. The coolant flow in the radiator pipe flows vertically from the top to bottom while the air flows horizontally (crossflow heat exchanger). The radiator tube and fin were made of aluminum. The hot fluid is water with the water, its entry temperature maintained at 80°C and the air temperature entering 30°C. The experimental method uses the following parameters: water temperature, air temperature, and fluid flow rate. This research uses the LMTD method experimentally and NTU theoretically to analyze data. The inlet water flow is varied 5 lpm, 10 lpm, and 15 lpm, and the air flows rate is varied by 0,094 m3/s, 0,124 m3/s, and 0,155 m3/s. The research results show that the energy equilibrium obtained from the experiment has a maximum deviation of ±10 %. The higher airflow rate and water flow rate in the radiator tube result in a higher heat transfer rate value. The airflow rate is 0,155 m3/s with a water flow rate of 15 lpm, i.e., the airside (cold) Uc by 55,3241 W/m2.K and for the waterside (hot) Uh by 164,343 W/m2.K and percentage comparison of outlet water temperature of 2% and outlet air temperature by 13%, experimentally and theoretically. [ABSTRACT FROM AUTHOR] |
