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Publication Type : Journal Article
Publisher : Elsevier
Source : Renewable Energy, Vol. 145, pp. 2733-2740.
Url : https://www.sciencedirect.com/science/article/abs/pii/S096014811931211X
Campus : Coimbatore
School : School of Artificial Intelligence - Coimbatore
Year : 2020
Abstract : Nanofluids inherently have high emissivity in the mid-infrared region making them unsuitable for satisfying the conditions of solar selectivity required for direct absorbers. In this study, a layer of silicone oil is located above nanofluid comprising of graphite nanoparticles and deionized water. Silicone oil layer is shown to act as a barrier against the infrared emissions from the nanofluid. High transparency of silicone oil in the visible solar spectrum and high absorptivity in the mid-infrared wavelength range made it an excellent candidate for this study. Solar selectively was achieved by using two different liquid layers (nanofluid and silicone oil) in direct thermal contact. Silicone oil layer on the top of the nanofluid resulted in an approximately 17% higher temperature rise in the nanofluid.
Cite this Research Publication : Bhalla, V., Beejawat, S., Doshi, J., Khullar, V., Singh, H., and Tyagi, H., 2020, "Silicone Oil Envelope for Enhancing the Performance of Nanofluid-based Direct Absorption Solar Collectors", Renewable Energy, Vol. 145, pp. 2733-2740.