Optimize the Evaporating Heat Transfer Coefficient of Refrigeration System Using Nano Fluid

Abstract:

Improving heat transfer characteristics in refrigeration and air conditioning systems has been intensively studied by many investigators. In the present work the effect of using CuO-R134a in the vapour compression system on the evaporating heat transfer coefficient is investigated by CFD heat transfer analysis using the FLUENT software. An experimental test rig is designed for this purpose. The test section is a horizontal tube in the tube heat exchanger made from copper. The refrigerant is evaporated inside an inner copper tube and the heat load is provided from hot water that passing in an annulus surrounding the inner tube. Heat transfer coefficients were evaluated using FLUENT for heat flux ranged from 10 to 40 kW/m², using nanoCuO concentrations ranged from 0.05 to 1% and particle size from 15 to 70 nm. The measurements indicated that for a certain nanoconcentration as heat flux or mass flux increases the evaporating heat transfer coefficient increases and also that the evaporating heat transfer coefficient increases with increasing nanoCuO concentrations up to certain value then decreases. The obtained evaporating heat transfer coefficient result have been optimized at its maximum value for the best CuOnano particles concentration in R134a refrigerant.

• Periodical: Applied Mechanics and Materials (Volumes 592-594)
• Pages: 951-955
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.592-594.951
• Online since: July 2014
• Authors: T. Coumaressin*, K. Palaniradja, K. Velmurugan
• Keywords: CFD, Evaporator, Heat Transfer Coefficient, Nanofluid

References

[1] Pawel K. P., Jeffrey A.E. and David G.C., Nanofluids for thermal transport. Materials Today, pp.36-44, (2005).

[2] Liu M-S, Lin MC-C, Huang I-Te, Wang C-C. Enhancement of thermal conductivity with CuO for nanofluids. Chem Eng Technol; 29(1): 72–7, (2006).

[3] Bi S., Shi L. and Zhang L., Application of nanoparticles in domestic refrigerators. Applied Thermal Engineering, Vol. 28, pp.1834-1843, (2008).

DOI: 10.1016/j.applthermaleng.2007.11.018

[4] Juan Carlos Valdez Loaiza, Frank Chaviano Pruzaesky, Jose Alberto Reis parise, A numerical Study on the Application of Nanofluids in Refrigeration Systems, Int. Refri. And Air-condtn. Conference, paper 1145, July 12-15, (2010).

[5] N. Subramani ,M. J. Prakash., Experimental studies on a vapour compression system using nanorefrigerants, International Journal of Engineering, Science and Technology Vol. 3, No. 9, pp.95-102, (2011).

DOI: 10.4314/ijest.v3i9.8

[6] Eed Abdel-Hafez Abdel-Hadi, Sherif Hady Taher., Heat Transfer Analysis of Vapor Compression System Using Nano CuoR134a, International Conference on Advanced Materials Engineering, vol. 15 . (2011).

[7] Bi S., Guo K., Liu Z., Performance of a domestic refrigerator using TiO2-R600a nanorefrigerant as working fluid. Energy Conversion and Management, Vol. 52, No. 1, pp.733-737, (2011).

DOI: 10.1016/j.enconman.2010.07.052

[8] R. Saidura, K.Y. Leongb, H.A. Mohammadc, A review on applications and challenges of nanofluids, Renewable and Sustainable Energy Reviews 15, 1646–1668, (2011).

[9] A. Baskaran, P. Koshy Mathews , A Performance comparison of vapour compression refrigeration system using Eco friendly refrigerants of low GWP, Int. J. Sci. Research, 2(9): Sep (2012).

[10] D. Sendil Kumar, Dr. R. Elansezhian ., Experimental Study on Al2O3-R134a Nano Refrigerant in Refrigeration System, International Journal of Modern Engineering Research (IJMER) Vol. 2, Issue. 5, pp-3927-3929, Sep. -Oct. (2012).

[11] R. Krishna Sabareesh,N. Gobinath, V. Sajithb, Sumitesh Das, C.B. Sobhan, Application of TiO2 Nanoparticles as a Lubricant-Additive for Vapour compression Refrigeration systems-An Experimental Investigation, Int. J. Refri., 35(7): 1989, Nov (2012).

DOI: 10.1016/j.ijrefrig.2012.07.002

[12] Gupta H. K, Agrawal G. D, Mathur J., An overview of Nanofluids: A new media towards green environment, International Journal of environmental sciences volume 3, no 1, (2012).

[13] Reji kumar. R and Sridhar. K, Heat transfer enhancement in domestic refrigerator using nanorefrigerant as working fluid, Int. J. Comp. Eng. Res., 3(4) : 42, Apr (2013).