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

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

© 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

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.

Hybrid Nanofluids; Heat pipe; Thermal Resistance; wick structure

[1] Minghui Xie, Zhihu Xue, Wei Qu, Wei Li, Experimental Investigation of Heat Transfer Performance of Rotating Heat Pipe, Procedia Engineering, 99 (2015) 746-751.
[2] Shirvan KM, Ellahi R, Mirzakhanlari S, Mamourian M. Enhancement of Heat Transfer and Heat Exchanger Effectiveness in a Double Pipe Heat Exchanger Filled with Porous Media : Numerical Simulation and Sensitivity Analysis of Turbulent Fluid Flow. Appl Therm Eng (2016). https://doi.org/10.1016/j.applthermaleng.2016.08.116.
[3] Ranjith, Shaji K. Numerical Analysis on a Double Pipe Heat Exchanger with Twisted Tape Induced Swirl Flow on Both Sides. Procedia Technol., 24 (2016) 436–43. https://doi.org/10.1016/j.protcy.2016.05.060.
[4] Ebrahimnia-bajestan E, Charjouei M, Niazmand H. International Journal of Heat and Mass Transfer Experimental and numerical investigation of nanofluids heat transfer characteristics for application in solar heat exchangers. International Journal of Heat and Mass Transfer 92 (2016) 1041–52. https://doi.org/10.1016/j.ijheatmasstransfer.2015.08.107.
[5] Ramos J, Chong A, Jouhara H. International Journal of Heat and Mass Transfer Experimental and numerical investigation of a cross-flow air-to-water heat pipe-based heat exchanger used in waste heat recovery. International Journal of Heat Mass Transfer (102) (2016) 1267–81. https://doi.org/10.1016/j.ijheatmasstransfer.2016.06.100.
[6] Sun L, Zhang C. International Journal of Thermal Sciences Evaluation of elliptical finned-tube heat exchanger performance using CFD and response surface methodology. International Journal of Thermal Science 75 (2014) 45–53. https://doi.org/10.1016/j.ijthermalsci.2013.07.021.
[7] Pawar SS, Sunnapwar VK. Experimental and CFD investigation of convective heat transfer in helically coiled tube heat exchanger. Chem Eng Res Des (2014) 1–19. https://doi.org/10.1016/j.cherd.2014.01.016.
[8] Senthilkumar R, Vaidyanathan.S, Sivaraman.B, Effect of Inclination Angle in Heat Pipe Performance Using Copper Nanofluid. Procedia Eng 38 (2012) 3715–21. https://doi.org/10.1016/j.proeng.2012.06.427.
[9] Karthikeyan M, Vaidyanathan.S, Sivaraman.B, Heat Tarnsfer analysis of Two Phase Closed Thermosyphon using Aqueous solution of n-Butanol. International Journal of Engineering and Technology ,03 (2013) 661-667.
[10] Gunabal S, Sivaraman.B, Effect of TiO2 nano particle in waste heat recovery system using heat pipes. International Journal of Engineering Science & Advanced Technology 4 (2014) 378–81.
[11] Bala Bhaskara Rao J, Ramachandra Raju V, Numerical and heat transfer analysis of shell and tube heat exchanger with circular and elliptical tubes. International Journal of Mechanical & Materials Engineering. (2016) 1–18. https://doi.org/10.1186/s40712-016-0059-x.
[12] Senthilkumar R, Vaidyanathan.S, Sivaraman.B, Study of Heat pipe Performane using an aqueous solution of n-Butanol, Indian Jounal of Science Technology. 3 (2010) 1–4.
[13] Albadr J, Tayal S, Alasadi M. Heat transfer through heat exchanger using Al2O3 nanofluid at different concentrations. Case Studies in Thermal Engineering, 1 (2013) 38–44. https://doi.org/10.1016/j.csite.2013.08.004.
[14] Nookaraju BC, Sohail M, Karthikeyan R. Experimental investigation and optimization of process parameters of hybrid wick heat pipe using with RSM historical data design. Materials Today Proceedings, (2020). https://doi.org/10.1016/j.matpr.2020.05.634.