Abstract
In this study, experimental research on the performance evaluation and flow visualization of the pulsating heat pipe (PHP) has been carried out. The PHP made of aluminum plate and consists of 24 parallel square channel with 2×2 mm^2. The working fluids used were water and 1-Butanol aqueous solution (so-called self-rewetting fluids). Self-rewetting fluids show unique surface tension behavior which causes the fluids heat transfer enhancement. The experimental results indicate that heat transfer performance of the PHP using 1-Butanol aqueous solution was enhancement. And liquid slugs moving between heating and cooling sections contained considerable minute air bubbles by improving boiling phenomenon.
