Abstract
In this study, a porous wick copper flat heat pipe is investigated in horizontal position. The hysteresis phenomenon shows that the heat flux increase enables lower vapor temperatures and more transient state delay 840 s at 5 W compared to the heat flux decrease. Working fluid filling ratios effects on the cooling performance were examined including temperatures distribution, heat pipe thermal resistances and effective thermal conductivity. The fill ratio of 25% is found to be the optimal charge, for which the maximum effective thermal conductivity was about 891 W/mK at 7 W input load. Experimental results and figure of limit factors show that n-pentane be the optimal working fluid comparing to the other studied fluids.The application of the studied heat pipe in cooling a television box is investigated by comparing the conventional cooling solution using fans and a passive cooling configuration using the flat heat pipe. Experimental results show that heat pipe is an efficient alternative passive cooling device which enables cooling all electronic components of the television box.
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