Modeling of shell and tube heat recovery exchanger operated with nanofluid based coolants

The emergence of several challenging issues such as climate change, fuel price hike and fuel security have become hot topics around the world. Therefore, introducing highly efficient devices and heat recovery systems are necessary to overcome these challenges. It is reported that a high portion of i...

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Bibliographic Details
Published in:International journal of heat and mass transfer 2012-01, Vol.55 (4), p.808-816
Main Authors: Leong, K.Y., Saidur, R., Mahlia, T.M.I., Yau, Y.H.
Format: Article
Language:English
Subjects:
Applied sciences
Chemistry
Colloidal state and disperse state
Condensed matter: structure, mechanical and thermal properties
Devices using thermal energy
Energy
Energy. Thermal use of fuels
Ethylene glycol
Exact sciences and technology
Flue gas
Fluid flow
General and physical chemistry
Heat exchangers
Heat exchangers (included heat transformers, condensers, cooling towers)
Heat recovery
Mathematical models
Nanocomposites
Nanofluids
Nanomaterials
Nanostructure
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Physics
Rational use of energy: conservation and recovery of energy
Thermal properties of condensed matter
Thermal properties of small particles, nanocrystals, nanotubes
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Summary:The emergence of several challenging issues such as climate change, fuel price hike and fuel security have become hot topics around the world. Therefore, introducing highly efficient devices and heat recovery systems are necessary to overcome these challenges. It is reported that a high portion of industrial energy is wasted as flue gas from heating plants, boilers, etc. This study has focused on the application of nanofluids as working fluids in shell and tube heat recovery exchangers in a biomass heating plant. Heat exchanger specification, nanofluid properties and mathematical formulations were taken from the literature to analyze thermal and energy performance of the heat recovery system. It was observed that the convective and overall heat transfer coefficient increased with the application of nanofluids compared to ethylene glycol or water based fluids. It addition, 7.8% of the heat transfer enhancement could be achieved with the addition of 1% copper nanoparticles in ethylene glycol based fluid at a mass flow rate of 26.3 and 116.0 kg/s for flue gas and coolant, respectively.
ISSN:0017-9310
1879-2189
DOI:10.1016/j.ijheatmasstransfer.2011.10.027