Experimental Investigation of Effective Adiabatic Length As A Heat Pipe Heat Exchanger

Experimental Investigation of Effective Adiabatic Length As A Heat Pipe Heat Exchanger
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© 2021 by IJETT Journal
Volume-69 Issue-6
Year of Publication : 2021
Authors : S. Prathiban, B. Sivaraman
DOI :  10.14445/22315381/IJETT-V69I6P207

How to Cite?

S. Prathiban, B. Sivaraman, "Experimental Investigation of Effective Adiabatic Length As A Heat Pipe Heat Exchanger" International Journal of Engineering Trends and Technology, vol. 69, no. 6, pp. 43-49, 2021. Crossref, https://doi.org/10.14445/22315381/IJETT-V69I6P207

Abstract
This experimental work analyzed the effect caused by factors such as adiabatic length, inclination angle, hot and cold-water mass flow rate, and heat input given to the heat pipe heat exchanger on its thermal resistance. The working fluid used in the heat pipe is a hybrid nanofluid. The hybrid nanofluid is prepared by blending aluminum and titanium oxide (0.2% concentration) nanofluid in the volume ratio of 70:30 with water as base fluid. Three adiabatic lengths (0 mm, 100 mm, and 200 mm) and four different inclination angles (0°, 15°, 30°, and 45°) are taken for the investigation. The study is carried out for various mass flow rates of hot water such as 0.8, 0.6, 0.4, and 0.2 liters per minute across the evaporator segment with heat inputs of 40, 60, and 80 Watts. The cold-water mass flow rate (Mc) is maintained at 50% of the hot water mass flow rate (Mh) for all the test conditions. The experimental research findings prove that an increase in Mh increases the thermal resistance of the heat pipe heat exchanger. It is also found from the investigation that the heat pipe heat exchanger shows higher thermal resistance for an adiabatic length of 200 mm with 30° inclination and 80 W heat input at all the hot water mass flow rates.

Keywords
Hybrid Nanofluids; Heat pipe; Thermal Resistance; wick structure

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