Preliminary Experiment of Vertical Straight Wickless-Heat Pipe as Passive Cooling System in Irradiator

Prayogo, Kukuh and Putra, Nandy Setiadi Djaya and Hadi Kusuma, Mukhsinun and Winarta, Adi and Ariantara, Bambang (2019) Preliminary Experiment of Vertical Straight Wickless-Heat Pipe as Passive Cooling System in Irradiator. Journal Advanced Research in Fluid Mechanics and Thermal Sciences, 55 (2). pp. 264-271. ISSN 2289 - 7879

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Abstract

The multipurpose Irradiator in Indonesia with capacity of 2 MCi Co-60 radioactive source was built to support food security. When not operated, the Co-60 is stored in the pool to keep the radiation not to exposure to environment. The decay heat generation of Co-60 could increase the pool water temperature. To improve safety especially during SBO conditions, the pool water should be passively cooled using a vertical straight wickless-heat pipe. The objective of this experimental study is to investigate the heat transfer phenomena and the thermal performance of the vertical straight wickless-heat pipe as passive cooling system in the irradiator pool. Vertical straight wickless-heat pipe with inner diameter of 57 mm and total length of 1000 mm was charged with demineralized water of working fluid with filling ratio of 55%. This experiment was conducted with varied pool temperature, and air coolant velocity in the condenser section. The experiment results obtained that the lowest thermal resistance of wickless-heat pipe is 0.03 °C/W when heat pipe is operated at pool temperature of 90ºC and air coolant velocity of 1 m/s. It can be concluded that the vertical straight wickless-heat pipe has good thermal performance to absorb the heat generation in the irradiator pool. The results of this study are expected to provide a more complete management thermal knowledge to improve the safety of Irradiator.

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