Experimental Study on Enhanced Heat Transfer Characteristis of Synergistic Coupling between the Pulsating Heat Pipes

AbstractUsing a constant temperature water bath as heat source, experiments are performed to investigate the heat transfer characteristies of the coupled pulsating heat pipe (PHP), which consists of the main PHP filled with distilled water and the synergistic oscillating PHP filled with ethanol. The heat transfer characteristies and the wall temperatures of the coupled PHP are analyzed and compared with the single PHP only made of the main PHP under the same condition. The results shows that: in the same heat source temperature, the heat absorption and the heat release of the coupled PHP are both greater than the single PHP's, and the heat transfer is better in the case of small temperature difference. From 50̊C, the condenser section of the synergistic oscillating PHP occures oscillating, the pulsating working fluid flow and the oscillating heat transfer characteristics can effect the main PHP, an optimal effect of enhanced heat transfer can been obtained by the two mutual incentive PHPs