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Heat transfer characteristics of a two-phase closed thermosyphon using de ionized water mixed with silver nano

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Abstract

Effect of using silver nanofluid (De Ionize water mixed with silver nano and particles less than 100 nm.) on heat transfer characteristics of a two-phase closed thermosyphon at normal operating condition was investigated in this research. The thermosyphon made by copper tube with 7.5, 11.1 and 25.4 mm ID. The filling ratios of 30, 50 and 80% by evaporator length and aspect ratios of 5, 10, and 20 (Le/d i ) with vertical position. Pure water and DI water mixed with silver nanofluid of us as working fluid to compare. The working temperatures were 40, 50 and 60°C. It was found that, the maximum hat transfer rate of 750.81 W, with aspect ratio of 20(diameter of 25.4 mm ID) and working temperature of 60°C. The DI water mixed silver nanofluids more than approximate 70% to compare with pure water.

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Abbreviations

Q :

Heat transfer rate (W)

\( \dot{m} \) :

Mass per unit time (kg/s)

C P :

Specific heat capacity constant pressure (J/Kg°C)

T out :

Outlet temperature at condenser section (°C)

T in :

Inlet temperature at condenser section (°C)

T v :

Working temperature (°C)

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Acknowledgments

The researcher have been supported generously by the Faculty of Engineering Mahasarakham University and Thailand Research Fund (TRF).

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Correspondence to S. Rittidech.

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Paramatthanuwat, T., Boothaisong, S., Rittidech, S. et al. Heat transfer characteristics of a two-phase closed thermosyphon using de ionized water mixed with silver nano. Heat Mass Transfer 46, 281–285 (2010). https://doi.org/10.1007/s00231-009-0565-y

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  • DOI: https://doi.org/10.1007/s00231-009-0565-y

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