Stability and Thermal Properties Study of Metal Chalcogenide-Based Nanofluids for Concentrating Solar Power

Paloma Martínez-Merino, Rodrigo Alcántara, Teresa Aguilar, Juan Jesús Gallardo, Iván Carrillo-Berdugo, Roberto Gómez-Villarejo, Mabel Rodríguez-Fernández and Javier Navas
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Paloma Martínez-Merino: Departamento de Química Física, Facultad de Ciencias, Universidad de Cádiz, E-11510 Cádiz, Spain
Rodrigo Alcántara: Departamento de Química Física, Facultad de Ciencias, Universidad de Cádiz, E-11510 Cádiz, Spain
Teresa Aguilar: Departamento de Química Física, Facultad de Ciencias, Universidad de Cádiz, E-11510 Cádiz, Spain
Juan Jesús Gallardo: Departamento de Química Física, Facultad de Ciencias, Universidad de Cádiz, E-11510 Cádiz, Spain
Iván Carrillo-Berdugo: Departamento de Química Física, Facultad de Ciencias, Universidad de Cádiz, E-11510 Cádiz, Spain
Roberto Gómez-Villarejo: Departamento de Química Física, Facultad de Ciencias, Universidad de Cádiz, E-11510 Cádiz, Spain
Mabel Rodríguez-Fernández: Departamento de Química Física, Facultad de Ciencias, Universidad de Cádiz, E-11510 Cádiz, Spain
Javier Navas: Departamento de Química Física, Facultad de Ciencias, Universidad de Cádiz, E-11510 Cádiz, Spain

Energies, 2019, vol. 12, issue 24, 1-11

Abstract: Nanofluids are colloidal suspensions of nanomaterials in a fluid which exhibit enhanced thermophysical properties compared to conventional fluids. The addition of nanomaterials to a fluid can increase the thermal conductivity, isobaric-specific heat, diffusivity, and the convective heat transfer coefficient of the original fluid. For this reason, nanofluids have been studied over the last decades in many fields such as biomedicine, industrial cooling, nuclear reactors, and also in solar thermal applications. In this paper, we report the preparation and characterization of nanofluids based on one-dimensional MoS 2 and WS 2 nanosheets to improve the thermal properties of the heat transfer fluid currently used in concentrating solar plants (CSP). A comparative study of both types of nanofluids was performed for explaining the influence of nanostructure morphologies on nanofluid stability and thermal properties. The nanofluids prepared in this work present a high stability over time and thermal conductivity enhancements of up to 46% for MoS 2 -based nanofluid and up to 35% for WS 2 -based nanofluid. These results led to an increase in the efficiency of the solar collectors of 21.3% and 16.8% when the nanofluids based on MoS 2 nanowires or WS 2 nanosheets were used instead of the typical thermal oil.

Keywords: nanofluids; heat transfer fluid (HTF); concentrating solar power (CSP); parabolic trough collector (PTC); nanowires; nanosheets; stability; thermophysical properties (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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