TY - JOUR
T1 - Self-adaptive heat spreader with a micromesh using LIGA-like technology for AUV LED headlight
AU - Shen, S. C.
AU - Huang, H. J.
AU - Hsieh, J. C.
AU - Shaw, H. J.
N1 - Funding Information:
The authors would like to thank National Science Council (NSC) for their financial supports to the project (granted number NSC 97-2622-E-006-014-CC3, NSC 97-2628-E-006-124-MY2), Chung-Shan Institute of Science and Technology for their financial supports to the project (granted number 98-EC-17-A-09-02-0769-V408), and Industrial Technology Research Institute (ITRI)/Micro Systems Technology Center, Tainan, Taiwan, for providing access to equipment and technical support.
PY - 2010/4
Y1 - 2010/4
N2 - An autonomous underwater vehicle (AUV) is invariably equipped with a self-contained power supply. If the power consumption of the vehicle is lowered, its working time and performance will be enhanced. For the foregoing purpose, the research aims at developing high-brightness LED headlights to replace conventional high-pressure mercury lamps. In the research, high-brightness LEDs often develop hot-spot problems which result in a huge increase of local temperatures and reduces their service life and brightness. Therefore, the paper presents self-adaptive micro heat spreaders to eliminate the problem of high thermal density, approximately 100 W/cm2, and to provide constant high-brightness illumination in agreement with the various undersea positions of the AUV. A composite moisture-retaining structure is fabricated using a LIGA-like process and it is incorporated by the self-adaptive micro heat spreader. The unique structure improves the moisture-retaining efficiency of the micro devices in the heat spreader. As a result, the newly-designed heat spreader maintains the original thermal equilibrium and heat dissipation capabilities, eliminates the effect of gravity on the working fluid, and lifts the restraint imposed on the two-phase heat-dissipation device in the dynamic mechanism. With this feature, the new heat spreader is suitable for LED headlights of AUVs, helping reduce power consumption.
AB - An autonomous underwater vehicle (AUV) is invariably equipped with a self-contained power supply. If the power consumption of the vehicle is lowered, its working time and performance will be enhanced. For the foregoing purpose, the research aims at developing high-brightness LED headlights to replace conventional high-pressure mercury lamps. In the research, high-brightness LEDs often develop hot-spot problems which result in a huge increase of local temperatures and reduces their service life and brightness. Therefore, the paper presents self-adaptive micro heat spreaders to eliminate the problem of high thermal density, approximately 100 W/cm2, and to provide constant high-brightness illumination in agreement with the various undersea positions of the AUV. A composite moisture-retaining structure is fabricated using a LIGA-like process and it is incorporated by the self-adaptive micro heat spreader. The unique structure improves the moisture-retaining efficiency of the micro devices in the heat spreader. As a result, the newly-designed heat spreader maintains the original thermal equilibrium and heat dissipation capabilities, eliminates the effect of gravity on the working fluid, and lifts the restraint imposed on the two-phase heat-dissipation device in the dynamic mechanism. With this feature, the new heat spreader is suitable for LED headlights of AUVs, helping reduce power consumption.
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U2 - 10.1016/j.apor.2009.10.009
DO - 10.1016/j.apor.2009.10.009
M3 - Review article
AN - SCOPUS:77955175912
VL - 32
SP - 137
EP - 145
JO - Applied Ocean Research
JF - Applied Ocean Research
SN - 0141-1187
IS - 2
ER -