Synergistic analysis of heat transfer characteristics of an internally finned two phase closed thermosyphon. (25th May 2016)

• Record Type: Journal Article
• Authors: Nair, RohitS; Balaji, C.
• Is Part Of: Applied thermal engineering. Volume 101(2016:May)
• Page Start: 720
• Page End: 729
• Publication Date: 2016-05-25
• Subjects: Thermosyphon -- Internal fins -- Numerical model -- Lumped parameter model; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2016.01.084
• Languages: English
• ISSNs: 1359-4311

Abstract

Highlights: A novel thermosyphon configuration with rectangular internal fins at the condenser. A synergistic approach by combining VOF model and lumped parameter model. A modified steady state theoretical model to simulate the operation of a thermosyphon. Analysis of effect of increasing fins inside the condenser section of the thermosyphon. Abstract: The present study focuses on developing a hybrid heat sink with a thermosyphon having internal fins. The primary motivation behind this work is to investigate the possibility of heat transfer enhancement by addition of extended surfaces inside the condenser section of the thermosyphon. The incorporation of internal fins is expected to reduce the filling ratio and the effective thermal resistance by way of enhanced condensation. A copper thermosyphon with water as working fluid is chosen for the present study. A steady state numerical model is developed to simulate the two phase interactions. A lumped parameter code is developed and is used in conjunction with the full numerical model. In the present study the effect of varying the number of internal fins for fixed boundary conditions on the performance of the thermosyphon is studied. The computational models are validated against experimental results available in the literature. The simulations are carried out using Ansys Fluent 14 and the lumped parameter and the steady state numerical models are developed using Matlab 2012b.