Performance investigation of nanofluids as working fluid in a thermosyphon air preheater

Leong, K.Y. and Saidur, Rahman and Mahlia, T.M.I. and Yau, Y.H. (2012) Performance investigation of nanofluids as working fluid in a thermosyphon air preheater. International Communications in Heat and Mass Transfer, 39 (4). pp. 523-529. ISSN 07351933

Full text not available from this repository. (Request a copy)
Official URL: http://ac.els-cdn.com/S0735193312000152/1-s2.0-S07...

Abstract

In recent years, there has been a substantial increase in energy demand due to industrialization development. This raises concern on issues such as depletion of fossil based energy and emission of green house gasses. Hence, optimization of energy use through the thermosyphon air preheater is one of the possible approaches to address this problem. It can be used to recover and transmit the heat from the hot air (flue gas) to the cold air used for combustion process in a boiler. This study focuses on the analytical analysis of the thermal performance of a thermosyphon operated with water and nanofluids. The thermo physical properties of the selected nanofluids and relevant formulations are taken from the literatures to perform the analysis. Study found that change of nanofluid properties such as thermal conductivity only plays minor role in enhancing the thermal performance of the thermosyphon. The study implied that the hot air velocity is capable of increasing the efficiency of a thermosyphon. It is found that 23 overall heat transfer enhancement is observed when the hot air velocity increases from 2.0. m/s to 4.75. m/s for water based (7) alumina and (4) titanium dioxide nanofluids.

Item Type: Article
Additional Information: Export Date: 6 December 2012 Source: Scopus CODEN: IHMTD Language of Original Document: English Correspondence Address: Leong, K.Y.; Department of Mechanical Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia; email: leongkinyuen@gmail.com References: Saidur, R., Abdelaziz, E.A., Mekhilef, S., A review on energy saving strategies in industrial sector (2011) Renewable and Sustainable Energy Reviews, 15 (1), pp. 150-168; Saidur, R., Ahamed, J.U., Masjuki, H.H., Energy, exergy and economic analysis of industrial boilers (2010) Energy Policy, 38 (5), pp. 2188-2197; Liu, D., Tang, G.F., Zhao, F.Y., Wang, H.Q., Modeling and experimental investigation of looped separate heat pipe as waste heat recovery facility (2006) Applied Thermal Engineering, 26 (17-18), pp. 2433-2441; Murshed, S.M.S., Leong, K.C., Yang, C., Enhanced thermal conductivity of TiO 2-water based nanofluids (2005) International Journal of Thermal Sciences, 44 (4), pp. 367-373; Murshed, S.M.S., Leong, K.C., Yang, C., Investigations of thermal conductivity and viscosity of nanofluids (2008) International Journal of Thermal Sciences, 47 (5), pp. 560-568; Rea, U., McKrell, T., Hu, L.W., Buongiorno, J., Laminar convective heat transfer and viscous pressure loss of alumina water and zirconia-water nanofluids (2009) International Journal of Heat and Mass Transfer, 52 (7-8), pp. 2042-2048; He, Y., Men, Y., Zhao, Y., Lu, H., Ding, Y., Numerical investigation into the convective heat transfer of TiO 2 nanofluids flowing through a straight tube under the laminar flow conditions (2009) Applied Thermal Engineering, 29 (10), pp. 1965-1972; Kim, D., Kwon, Y., Cho, Y., Li, C., Cheong, S., Hwang, Y., Lee, J., Moon, S., Convective heat transfer characteristics of nanofluids under laminar and turbulent flow conditions (2009) Current Applied Physics, 9 (2 SUPPL. 1), pp. e119-e123; Duangthongsuk, W., Wongwises, S., An experimental study on the heat transfer performance and pressure drop of TiO 2-water nanofluids flowing under a turbulent flow regime (2010) International Journal of Heat and Mass Transfer, 53 (1-3), pp. 334-344; Shafahi, M., Bianco, V., Vafai, K., Manca, O., An investigation of the thermal performance of cylindrical heat pipes using nanofluids (2010) International Journal of Heat and Mass Transfer, 53 (1-3), pp. 376-383; Do, K.H., Ha, H.J., Jang, S.P., Thermal resistance of screen mesh wick heat pipes using the water-based Al 2O 3 nanofluids (2010) International Journal of Heat and Mass Transfer, 53 (25-26), pp. 5888-5894; Mousa, M.G., Effect of nanofluid concentration on the performance of circular heat pipe (2010) Ain Shams Engineering Journal, 2 (1), pp. 63-69; Do, K.H., Jang, S.P., Effect of nanofluids on the thermal performance of a flat micro heat pipe with a rectangular grooved wick (2010) International Journal of Heat and Mass Transfer, 53 (9-10), pp. 2183-2192; Qu, J., Wu, H., Thermal performance comparison of oscillating heat pipes with SiO 2/water and Al 2O 3/water nanofluids (2011) International Journal of Thermal Sciences, 50 (10), pp. 1954-1962; Noie, S.H., Investigation of thermal performance of an air-to-air thermosyphon heat exchanger using #-NTU method (2006) Applied Thermal Engineering, 26 (5-6), pp. 559-567; Incropera, F.P., Dewitt, D.P., Bergman, T.L., Lavine, A.S., (2007) Introduction to Heat Transfer, , John Wiley & Sons (Asia), Singapore; Nuntaphan, A., Tiansuwan, J., Kiatsiriroat, T., Enhancement of heat transport in thermosyphon air preheater at high temperature with binary working fluid: a case study of TEG-water (2002) Applied Thermal Engineering, 22 (3), pp. 251-266; Murshed, S.M.S., Leong, K.C., Yang, C., A combined model for the effective thermal conductivity of nanofluids (2009) Applied Thermal Engineering, 29 (11-12), pp. 2477-2483; Khanafer, K., Vafai, K., A critical synthesis of thermophysical characteristics of nanofluids (2011) International Journal of Heat and Mass Transfer, 54 (19-20), pp. 4410-4428; Leong, K.Y., Saidur, R., Kazi, S.N., Mamun, A.H., Performance investigation of an automotive car radiator operated with nanofluid-based coolants (nanofluid as a coolant in a radiator) (2010) Applied Thermal Engineering, 30 (17-18), pp. 2685-2692; Ijam, A., Saidur, R., Nanofluid as a coolant for electronic devices (cooling of electronic devices) (2012) Applied Thermal Engineering, 32, pp. 76-82; Hewitt, G.F., Shires, G.L., Bott, T.R., (1993) Process Heat Transfer, , CRC Press, Inc; Hagens, H., Ganzevles, F.L.A., van der Geld, C.W.M., Grooten, M.H.M., Air heat exchangers with long heat pipes: experiments and predictions (2007) Applied Thermal Engineering, 27 (14-15), pp. 2426-2434; Qu, J., Wu, H.Y., Cheng, P., Thermal performance of an oscillating heat pipe with Al 2O 3 water nanofluids (2010) International Communications in Heat and Mass Transfer, 37 (2), pp. 111-115; Naphon, P., Assadamongkol, P., Borirak, T., Experimental investigation of titanium nanofluids on the heat pipe thermal efficiency (2008) International Communications in Heat and Mass Transfer, 35 (10), pp. 1316-1319
Uncontrolled Keywords: Air-preheater, Heat exchanger, Nanofluids, Thermosyphon, Analytical analysis, Cold air, Combustion pro-cess, Energy demands, Energy use, Heat Transfer enhancement, Hot air, Nano-fluid, Thermal Performance, Thermo-physical property, Thermosyphons, Water based, Working fluid, Air, Air preheaters, Alumina, Capillary flow, Energy management, Flue gases, Greenhouse gases, Heat exchangers, Mixed convection, Siphons, Thermal conductivity, Titanium dioxide, Nanofluidics.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 03 Jul 2013 03:43
Last Modified: 25 Oct 2019 06:22
URI: http://eprints.um.edu.my/id/eprint/6559

Actions (login required)

View Item View Item