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Title: A concentrated solar cavity absorber with direct heat transfer through recirculating metallic particles

Abstract

A recirculating flow solar particle cavity absorber (receiver) is modeled to investigate the flow behavior and heat transfer characteristics of a novel developing concept. It features a continuous recirculating flow of non-reacting metallic particles (black silicon carbide) with air which are used as a thermal enhancement medium. The aim of the present study is to numerically investigate the thermal behavior and flow characteristics of the proposed concept. The proposed solar particle receiver is modeled using two phase discrete particle model (DPM), RNG k-flow model and discrete ordinate (DO) radiation model. Numerical analysis is carried out considering a solar receiver with only air and the mixture of non-reacting particles and air as a heat transfer as well as heat carrying medium. The parametric investigation is conducted considering the incident solar flux on the receiver aperture and changing air flow rate and recirculation rate inside the receiver. A stand-alone feature of the recirculating flow solar particle receiver concept is that the particles are directly exposed to concentrated solar radiation monotonously through recirculating flow inside the receiver and results in efficient irradiation absorption and convective heat transfer to air that help to achieve high temperature air and consequently increase in thermal efficiency. Thismore » paper presents, results from the developed concept and highlights its flow behavior and potential to enhance the heat transfer from metallic particles to air by maximizing heat carrying capacity of the heat transfer medium. The imposed milestones for the present system will be helpful to understand the radiation absorption mechanism of the particles in a recirculating flow based receiver, the thermal transport between the particles, the air and the cavity, and the fluid dynamics of the air and particle in the cavity.« less

Authors:
; ;  [1]
  1. Department of Mechanical Engineering, Rajshahi University of Engineering and Technology, Rajshahi-6204 (Bangladesh)
Publication Date:
OSTI Identifier:
22608562
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1754; Journal Issue: 1; Conference: ICME 2015: 11. international conference on mechanical engineering, Dhaka (Bangladesh), 18-20 Dec 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 14 SOLAR ENERGY; ABSORPTION; AIR FLOW; APERTURES; CAPACITY; CAVITIES; FLOW MODELS; FLOW RATE; FLUID MECHANICS; HEAT TRANSFER; MIXTURES; NUMERICAL ANALYSIS; SILICON; SILICON CARBIDES; SOLAR CELLS; SOLAR FLUX; SOLAR PARTICLES; SOLAR RECEIVERS; THERMAL EFFICIENCY

Citation Formats

Sarker, M. R. I., E-mail: islamrabiul@yahoo.com, Saha, Manabendra, E-mail: manabendra.saha@adelaide.edu.au, E-mail: manab04me@gmail.com, and Beg, R. A. A concentrated solar cavity absorber with direct heat transfer through recirculating metallic particles. United States: N. p., 2016. Web. doi:10.1063/1.4958431.
Sarker, M. R. I., E-mail: islamrabiul@yahoo.com, Saha, Manabendra, E-mail: manabendra.saha@adelaide.edu.au, E-mail: manab04me@gmail.com, & Beg, R. A. A concentrated solar cavity absorber with direct heat transfer through recirculating metallic particles. United States. doi:10.1063/1.4958431.
Sarker, M. R. I., E-mail: islamrabiul@yahoo.com, Saha, Manabendra, E-mail: manabendra.saha@adelaide.edu.au, E-mail: manab04me@gmail.com, and Beg, R. A. Tue . "A concentrated solar cavity absorber with direct heat transfer through recirculating metallic particles". United States. doi:10.1063/1.4958431.
@article{osti_22608562,
title = {A concentrated solar cavity absorber with direct heat transfer through recirculating metallic particles},
author = {Sarker, M. R. I., E-mail: islamrabiul@yahoo.com and Saha, Manabendra, E-mail: manabendra.saha@adelaide.edu.au, E-mail: manab04me@gmail.com and Beg, R. A.},
abstractNote = {A recirculating flow solar particle cavity absorber (receiver) is modeled to investigate the flow behavior and heat transfer characteristics of a novel developing concept. It features a continuous recirculating flow of non-reacting metallic particles (black silicon carbide) with air which are used as a thermal enhancement medium. The aim of the present study is to numerically investigate the thermal behavior and flow characteristics of the proposed concept. The proposed solar particle receiver is modeled using two phase discrete particle model (DPM), RNG k-flow model and discrete ordinate (DO) radiation model. Numerical analysis is carried out considering a solar receiver with only air and the mixture of non-reacting particles and air as a heat transfer as well as heat carrying medium. The parametric investigation is conducted considering the incident solar flux on the receiver aperture and changing air flow rate and recirculation rate inside the receiver. A stand-alone feature of the recirculating flow solar particle receiver concept is that the particles are directly exposed to concentrated solar radiation monotonously through recirculating flow inside the receiver and results in efficient irradiation absorption and convective heat transfer to air that help to achieve high temperature air and consequently increase in thermal efficiency. This paper presents, results from the developed concept and highlights its flow behavior and potential to enhance the heat transfer from metallic particles to air by maximizing heat carrying capacity of the heat transfer medium. The imposed milestones for the present system will be helpful to understand the radiation absorption mechanism of the particles in a recirculating flow based receiver, the thermal transport between the particles, the air and the cavity, and the fluid dynamics of the air and particle in the cavity.},
doi = {10.1063/1.4958431},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1754,
place = {United States},
year = {Tue Jul 12 00:00:00 EDT 2016},
month = {Tue Jul 12 00:00:00 EDT 2016}
}