The influence of mixing water on the thermophysical properties of nanofluids based on solar salt and silica nanoparticles
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Author/sMuñoz-Sánchez, Belen; Nieto-Maestre, Javier; Iparraguirre-Torres, Iñigo; Sanchez-Garcia, Jose Angel; Julia, Jose Enrique; [et al.]
thermal energy storage
The use of nanofluids (NFs) based on Solar Salt (SS) and nanoparticles (NPs), either as Thermal Energy Storage (TES) material or as Heat Transfer Fluid (HTF), is attracting great interest in recent years. Many authors [1,3] have reported important improvements on the thermophysical properties (specific heat capacity cp,thermal conductivity k) of NFs based on SS and ceramic NPs. These improvements would lead to important savings and better performance of TES facilities on new Concentrated Solar Power (CSP) plants due to lower quantities of material required and smaller storage tanks. To achieve these advantageous features in the final NFs, it is essential to avoid NP agglomeration during their preparation. Different synthesis procedures have been reported: mixing of solid NPs within a SS solution by means of ultrasounds [1-3], direct mixing of solid NPs and molten salt . In this work, NFs based on SS and 1% by wt. of silica NPs were synthetized from a SS-water solution and a commercial ...