Effect of filling ratio on thermal performance and thermal parameters of closed loop pulsating heat pipes

Kolková, Zuzana and Malcho, Milan (2013) Effect of filling ratio on thermal performance and thermal parameters of closed loop pulsating heat pipes. Structure & Environment, 5 (4). pp. 37-40. ISSN 2081-1500

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Improving the performance of electrical components needs higher heat removal from these systems. One of the solutions available is to use a sealed heat pipe with a throbbing filling, where development meets the current requirements for intensification of heat removal and elimination of moving parts cooling systems. Heat pipes operate using phase change working fluid, and it is evaporation and condensation. They have a meandering shape and are characterized by high intensity of heat transfer, high durability and reliability. Advantage of these tubes is that it is not necessary to create the internal capillary structure for transporting liquid and they need no pump to the working fluid circulation. They have a simple structure, low cost, high performance, and they can be used for various structural applications. The choice of working fluid volume and performance affects thermal performance. Distilled water, ethanol and acetone were used in the performance ranges of 0-80%.

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