Next Article in Journal
Alcyonacea: A Potential Source for Production of Nitrogen-Containing Metabolites
Previous Article in Journal
First-Principles Study of the Reaction between Fluorinated Graphene and Ethylenediamine
Previous Article in Special Issue
Thermal Degradation Characteristic and Flame Retardancy of Polylactide-Based Nanobiocomposites
Article Menu
Issue 2 (January-2) cover image

Export Article

Open AccessArticle
Molecules 2019, 24(2), 285; https://doi.org/10.3390/molecules24020285

Performance Investigation of High Temperature Application of Molten Solar Salt Nanofluid in a Direct Absorption Solar Collector

1
Science and Engineering Faculty, Queensland University of Technology, Brisbane QLD 4001, Australia
2
Department of Mechanical Engineering, Chittagong University of Engineering and Technology, Chittagong 4349, Bangladesh
3
Department of Mechanical Engineering, Dhaka University of Engineering and Technology, Gazipur 1700, Bangladesh
*
Author to whom correspondence should be addressed.
Academic Editor: Claudio Melis
Received: 14 November 2018 / Revised: 11 January 2019 / Accepted: 12 January 2019 / Published: 14 January 2019
(This article belongs to the Special Issue Thermodynamics and Thermal Transport Properties in Nanomaterials)
Full-Text   |   PDF [8195 KB, uploaded 17 January 2019]   |  

Abstract

Nanofluids have great potential in a wide range of fields including solar thermal applications, where molten salt nanofluids have shown great potential as a heat transfer fluid (HTF) for use in high temperature solar applications. However, no study has investigated the use of molten salt nanofluids as the HTF in direct absorption solar collector systems (DAC). In this study, a two dimensional CFD model of a direct absorption high temperature molten salt nanofluid concentrating solar receiver has been developed to investigate the effects design and operating variables on receiver performance. It has been found that the Carnot efficiency increases with increasing receiver length, solar concentration, increasing height and decreasing inlet velocity. When coupled to a power generation cycle, it is predicted that total system efficiency can exceed 40% when solar concentrations are greater than 100×. To impart more emphasis on the temperature rise of the receiver, an adjusted Carnot efficiency has been used in conjunction with the upper temperature limit of the nanofluid. The adjusted total efficiency also resulted in a peak efficiency for solar concentration, which decreased with decreasing volume fraction, implying that each receiver configuration has an optimal solar concentration. View Full-Text
Keywords: nanofluids; direct absorption solar collector; heat and mass transfer; computational fluid dynamics; molten salts nanofluids; direct absorption solar collector; heat and mass transfer; computational fluid dynamics; molten salts
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Karim, M.A.; Arthur, O.; Yarlagadda, P.K.; Islam, M.; Mahiuddin, M. Performance Investigation of High Temperature Application of Molten Solar Salt Nanofluid in a Direct Absorption Solar Collector. Molecules 2019, 24, 285.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Molecules EISSN 1420-3049 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top