Heat Transfer Augmentation by using Titanium dioxide Nanofluid in a Double Tube Heat Exchanger using CFD
Author(s):
Pushparaj Singh, Jay Prakash Pandey
Keywords:
Heat Transfer, Enhancement, Active and Passive Techniques, Nanofluid, Nanoparticles, TiO2, Heat exchanger.
Abstract
Heat exchangers play an increasingly important role in the field of energy conservation. The need for better efficient heat exchanging system is required for new technological and industrial development. Therefore, the scientific attention is concentrating both on improving the equipment design and on enhancing the thermal potential of the working fluid. Nanofluids are considered to offer important advantages over conventional heat transfer fluids. Recent advances in nanotechnology have allowed development of a new category of fluids termed nanofluids. Such fluids are liquid suspensions containing particles that are significantly smaller than 100 nm, and have a bulk solids thermal conductivity higher than the base liquids. Nanofluids are formed by suspending metallic or nonmetallic oxide nanoparticles in traditional heat transfer fluids. These so called nanofluids display good thermal properties compared with fluids conventionally used for heat transfer and fluids containing particles on the micrometer scale. Nanofluids are the new window which was opened recently and it was confirmed by several authors that these working fluid can enhance heat transfer performance. An investigation of heat transfer has been carried out in a double-pipe heat exchanger equipped using TiO2 as a Nano fluid and distilled water as base fluid. The results achieved from the use of the TiO2/water Nano fluid, are compared with Al2O3/water Nanofluid. The results of CFD reveals that at similar operating conditions, heat transfer, overall heat transfer coefficient associated with the simultaneous application of TiO2 /water Nano fluid better than those associated with the Al2O3/water Nanofluid. Evidently, heat transfer rate increases with increasing TiO2 /water Nano fluid
Article Details
Unique Paper ID: 148037

Publication Volume & Issue: Volume 5, Issue 12

Page(s): 116 - 120
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