Abstract
ABSTRACT An ultra-thin vapor chamber (1.5 mm thick) has been developed for experimental investigation. Aqueous solutions of propanol exhibiting concentration and thermal Marangoni effects are investigated as potential vapor chamber charge fluids, and their impact on the thermal performance is investigated and compared against pure water and 2-propanol. The vapor chamber thermal resistance and evaporator temperature are lower at low charges with pure 2-propanol and 2.4 M and 4.2 M 2-propanol-water solutions compared to pure water. A 4.2 M propanol-water mixture shows an almost 4.5 X increase in the evaporator heat transfer coefficient compared to pure water.
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