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Testing and development of a solar-dish cavity receiver for the melting of zinc metal
Dissertation (MEng (Mechanical Engineering))--University of Pretoria, 2024.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2024
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| _version_ | 1867613496023187456 |
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| access_status_str | Open Access |
| author2 | Le Roux, Willem G. |
| author_browse | Le Roux, Willem G. |
| author_facet | Le Roux, Willem G. |
| collection | Thesis |
| dc_rights_str_mv | © 2023 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MEng (Mechanical Engineering))--University of Pretoria, 2024. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/97976 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:37:03.713Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/97976 Testing and development of a solar-dish cavity receiver for the melting of zinc metal Le Roux, Willem G. u19202343@tuks.co.za Bezuidenhout, Pieter J.A. UCTD Sustainable Development Goals (SDGs) Cavity receiver Solar dish Concentrated solar power Zinc melting Renewable energy Engineering, built environment and information technology theses SDG-07 SDG-07: Affordable and clean energy SDG-09: Industry, innovation and infrastructure SDG-07: Affordable and clean energy Dissertation (MEng (Mechanical Engineering))--University of Pretoria, 2024. Concentrating solar power technologies can be applied to reduce the cost and carbon footprint of zinc melting processes. This study aims to improve the knowledge related to small-scale solar melting using a dish concentrator. This technology can be applied to zinc production as well as a range of small-scale applications, such as casting, recycling, galvanisation, and thermal storage. An experimental and analytical analysis of a rotating cylindrical cavity receiver for the indirect melting of zinc metal using concentrated solar power is presented. A multi-facet parabolic dish with an incident area of 2.85 m² was considered together with a rotating cylindrical cavity receiver. The receiver had an aperture diameter of 0.2 m and the capacity for housing 17 kg of zinc. Five experimental test runs were executed, during which up to 73.5 % of the zinc inventory could be tapped from the receiver in its molten state, and average thermal efficiencies of up to 42 % were achieved. A predictive analytical model considering wind speed, wind direction, and direct normal irradiance was developed and validated against experimental data. A heat transfer efficiency factor was experimentally determined to account for voids in the zinc feedstock. The model was used to predict that approximately 41 kg of molten zinc could be tapped from the experimental setup throughout a typical day with a peak direct normal irradiance of about 900 W/m² and an average wind speed below 2 m/s. A case study highlighted that energy savings of 0.6 kWh are achievable per kilogram of zinc processed by concentrated solar power rather than the conventional induction furnace. Mechanical and Aeronautical Engineering MEng (Mechanical Engineering) Unrestricted Faculty of Engineering, Built Environment and Information Technology SDG-07: Affordable and clean energy SDG-09: Industry, innovation and infrastructure 2024-09-02T14:21:16Z 2024-09-02T14:21:16Z 2024-09 2024-08 Dissertation * S2024 http://hdl.handle.net/2263/97976 DOI: https://doi.org/10.25403/UPresearchdata.26855203.v1 10.25403/UPresearchdata.26819788 en © 2023 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Sustainable Development Goals (SDGs) Cavity receiver Solar dish Concentrated solar power Zinc melting Renewable energy Engineering, built environment and information technology theses SDG-07 SDG-07: Affordable and clean energy SDG-09: Industry, innovation and infrastructure SDG-07: Affordable and clean energy Testing and development of a solar-dish cavity receiver for the melting of zinc metal |
| title | Testing and development of a solar-dish cavity receiver for the melting of zinc metal |
| title_full | Testing and development of a solar-dish cavity receiver for the melting of zinc metal |
| title_fullStr | Testing and development of a solar-dish cavity receiver for the melting of zinc metal |
| title_full_unstemmed | Testing and development of a solar-dish cavity receiver for the melting of zinc metal |
| title_short | Testing and development of a solar-dish cavity receiver for the melting of zinc metal |
| title_sort | testing and development of a solar dish cavity receiver for the melting of zinc metal |
| topic | UCTD Sustainable Development Goals (SDGs) Cavity receiver Solar dish Concentrated solar power Zinc melting Renewable energy Engineering, built environment and information technology theses SDG-07 SDG-07: Affordable and clean energy SDG-09: Industry, innovation and infrastructure SDG-07: Affordable and clean energy |
| url | http://hdl.handle.net/2263/97976 |