Pengujian Perpindahan Panas Konveksi Alami Sebagai Fungsi Sudut Pada Plat Dengan Muka Panas Menghadap Kebawah

Abstract

It so much tools that based on application of heat transfer in the natural convection, especially for the cooling effect. Cooling effect with Natural convection it is can be applied in the electricity technical field, transmission channel, transformator, current rectifier, and strand of metal that heated with electrics like is filament fluorescant lamp or element of electrics oven heater. This research aim is to know great of natural convection heat transfer coefficient at plate as angle function with heat part side to bottom and to compare coefficient value theoretically with experimental result, then must be made a testing tool that is tool of test in natural convection heat transfer at flat plate that was heated from upper direction using heater element next given axis at one of side so plate position can be arranged in accordance with desired inclination angle. The result of this research in several testing with different power used 50 Watts, 75 Watts and 100 Watts is value of the biggest natural convection heat transfer coefficient happens at angle 00 at power 100 Watts as high as 13,3 W/m2 0C and smallest happened in angle 900 with power 50 Watts as high as 4,39 W/m2 0C. Constanta Value C as high as 5x10-06 and m as high as 6,261 at vertical area, at horizontal area C as high as 9x10-12 and m as high as 12,79. and C as high 1x10-08 and m as high 9,126 for inclined area.