Abstract
The current work deals with the methods employed for the measurement of several wick parameters, outlines the experimental setup developed to measure pore radius and presents the results. Bi-porous copper wicks with distinguished sizes and pore characteristics are successfully developed for loop heat pipes. The powder compaction is performed at 12 KN force, followed by sintering at three different temperatures and durations. Among these, the best sintering condition is identified as 923 k and 90 min. The characterisation of wick shows that the porosity of 49% and a maximum capillary pore radius of 85 nm have been achieved. SEM examination of the wick surface shows the existence of large pores, which leads to increased porosity and interconnects the fine pore network responsible for generating the required capillary pumping pressure. The permeability of the fabricated bi-porous samples is found to be in the range of 2.46 × 10−14 m2. The measured hardness of the sintered sample is found to be 37.4 HRB.
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Acknowledgements
The characterisation experiments were conducted at the Central Instruments Facility of IIT Guwahati.
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Nashine, C., Mohaddin, N.A., Kumar, R., Sarma, S.K., Pandey, M. (2023). Development and Characterisation of Bi-porous Metallic Wick for Loop Heat Pipes. In: Joshi, S.N., Dixit, U.S., Mittal, R.K., Bag, S. (eds) Low Cost Manufacturing Technologies. NERC 2022. Springer, Singapore. https://doi.org/10.1007/978-981-19-8452-5_10
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DOI: https://doi.org/10.1007/978-981-19-8452-5_10
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