Experimental Investigation on Photothermal Properties of MWCNT-H₂O Nanofluids for Direct Absorption Solar Collectors

Abstract:

Optical and photothermal properties of MWCNT-H₂O nanofluids were investigated in the present work. The transmittance of nanofluids over solar spectrum (250 to 2500nm) was measured by the UV-Vis-NIR spectrophotometer based on integrating sphere principle. The photothermal properties of nanofluids were studied expose to the solar radiation. The experimental results show that the transmittance of MWCNT-H₂O nanofluids is much less than that of deionized water, and decreases with increasing nanoparticle mass fraction. The highest temperature and heat gain of MWCNT-H₂O nanofluids (0.02wt%) can increased up to 31.87% and 54.14% compared with deionized water, respectively. From the results it can be concluded that MWCNT-H₂O nanofluids is suitable for direct absorption solar thermal energy systems.

• Periodical: Applied Mechanics and Materials (Volume 521)
• Pages: 19-22
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.521.19
• Online since: February 2014
• Authors: Qin Bo He
• Keywords: Nanofluid, Photothermal Properties, Solar Energy, Transmittance

References

[1] Y. Liu, Y. Chen, J. Li, Hung T-c: Solar Energy. Vol. 86(2012), p.1586.

[2] J. E. Minardi and H. N. Chuang: Solar Energy. Vol. 17(1975), p.179.

[3] T. Iida, H. Ishihara: J Lumin Vol. 108(2004), p.351.

[4] R. Hajian, M. Layeghi, Abbaspour Sani K : Energ Convers Manage. Vol. 56(2012), p.63.

[5] X. Wang, A. Bin, J. Xu: Energ Convers Manage. Vol. 65 (2013), p.528.

[6] Q.B. He, S.F. Shuang, M.W. Tong and Y.D. Liu: Energ Convers Manage. Vol. 64(2012), p.199.

[7] H. Tyagi, P. Phelan, R. Prasher: Journal of Solar Energy Engine. Vol. 131(2009), p.041004.

[8] E. Sani, L. Mercatelli, S. Barison, et al: Sol Energ Mat Sol C. Vol. 95(2011), p.2994.

[9] T.P. Otanicar, P.E. Phelan, et al: Journal of Renewable and Susta. Vol. 2(2010), p.033102.

[10] C. F. Bohren, D. R. Huffman: New York: Wiley; (1983).