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Assessment of NIR Pigments for Use in Low Temperature Solar Thermal Collectors / OLIVER PENNEY

Swansea University Author: OLIVER PENNEY

  • E-Thesis – open access under embargo until: 26th April 2027

DOI (Published version): 10.23889/SUthesis.59943

Abstract

This EngD Thesis investigated the addition of Near Infrared (NIR) absorbing pigments into pre-finished steel coatings intended for use on the Transpired Solar Collector (TSC). The aim of the research was to improve the temperature uplift (ΔT) of lighter coloured coatings for the TSC, without affecti...

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Published: Swansea 2022
Institution: Swansea University
Degree level: Doctoral
Degree name: EngD
Supervisor: Searle, Justin R. ; Elvins, Jonathon
URI: https://cronfa.swan.ac.uk/Record/cronfa59943
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first_indexed 2022-05-03T11:57:41Z
last_indexed 2022-05-04T03:31:32Z
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spelling 2022-05-03T13:09:24.5515834 v2 59943 2022-05-03 Assessment of NIR Pigments for Use in Low Temperature Solar Thermal Collectors 716e59087d0bb5ddc24fc6453f730ccc OLIVER PENNEY OLIVER PENNEY true false 2022-05-03 This EngD Thesis investigated the addition of Near Infrared (NIR) absorbing pigments into pre-finished steel coatings intended for use on the Transpired Solar Collector (TSC). The aim of the research was to improve the temperature uplift (ΔT) of lighter coloured coatings for the TSC, without affecting the aesthetics of the coating, because NIR light is invisible to the human eye. A solar simulator was designed, built and calibrated to measure the ΔT of Hot Dip Galv (HDG) sample panels coated with NIR pigmented paints. Correlation of these ΔT results were then made with further analysis of the samples using the UV/Vis/NIR spectrometer, photographic records, and colour change measurements (ΔE). A model PVB coating was initially used to assess a range of commercially available, as well as novel single compound NIR absorbing pigments at a range of concentrations. The best four performing pigments were taken forward for inclusion in a polyurethane clear coat system. This work revealed that the method of processing the pigments into the paint had a large effect on coating performance, particularly for the nano powders. A single pigment, the Cesium Tungsten Oxide Nano Powder (Cs0.33WO3) was selected for the final stages of this research due to its combination of excellent NIR absorption and relatively low visual absorption and therefore ΔE. This was added to the clear coat and colour coat of two light coloured paints and produced promising results, especially for the darker of the two colours. The results of outdoor testing also helped to reveal where in the coating structure the pigment was most effective. Finally, using the UV/Vis/NIR data and TSR calculations a simple assessment on the overall impact of these additions was made. This concluded that savings of 250 kWh (52 kg of CO2) could be made annually for an average UK home over a non NIR pigmented coating. E-Thesis Swansea Coatings, Pre-finished steel coatings, Solar absorbing coatings, Polyurethane coatings, PVB, NIR absorbing pigments, Solar thermal, Transpired Solar Collector (TSC), Temperature uplift, Colour change, UV/Vis/NIR Spectrometer, Reduced tungsten oxide nano powder, Cesium tungsten oxide nano powder, Cs0.33WO3, Light coloured paints, ASHP, Colorcoat Prisma, Clear Coat, Solar simulator 26 4 2022 2022-04-26 10.23889/SUthesis.59943 COLLEGE NANME COLLEGE CODE Swansea University Searle, Justin R. ; Elvins, Jonathon Doctoral EngD Tata Steel / EPSRC / European Social Fund; Research grant number: EGR0630-100 2022-05-03T13:09:24.5515834 2022-05-03T12:54:36.6531697 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised OLIVER PENNEY 1 Under embargo Under embargo 2022-05-03T13:06:05.0053362 Output 15363671 application/pdf E-Thesis – open access true 2027-04-26T00:00:00.0000000 Copyright: The author, Oliver Penney, 2022. true eng
title Assessment of NIR Pigments for Use in Low Temperature Solar Thermal Collectors
spellingShingle Assessment of NIR Pigments for Use in Low Temperature Solar Thermal Collectors
OLIVER PENNEY
title_short Assessment of NIR Pigments for Use in Low Temperature Solar Thermal Collectors
title_full Assessment of NIR Pigments for Use in Low Temperature Solar Thermal Collectors
title_fullStr Assessment of NIR Pigments for Use in Low Temperature Solar Thermal Collectors
title_full_unstemmed Assessment of NIR Pigments for Use in Low Temperature Solar Thermal Collectors
title_sort Assessment of NIR Pigments for Use in Low Temperature Solar Thermal Collectors
author_id_str_mv 716e59087d0bb5ddc24fc6453f730ccc
author_id_fullname_str_mv 716e59087d0bb5ddc24fc6453f730ccc_***_OLIVER PENNEY
author OLIVER PENNEY
author2 OLIVER PENNEY
format E-Thesis
publishDate 2022
institution Swansea University
doi_str_mv 10.23889/SUthesis.59943
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 0
active_str 0
description This EngD Thesis investigated the addition of Near Infrared (NIR) absorbing pigments into pre-finished steel coatings intended for use on the Transpired Solar Collector (TSC). The aim of the research was to improve the temperature uplift (ΔT) of lighter coloured coatings for the TSC, without affecting the aesthetics of the coating, because NIR light is invisible to the human eye. A solar simulator was designed, built and calibrated to measure the ΔT of Hot Dip Galv (HDG) sample panels coated with NIR pigmented paints. Correlation of these ΔT results were then made with further analysis of the samples using the UV/Vis/NIR spectrometer, photographic records, and colour change measurements (ΔE). A model PVB coating was initially used to assess a range of commercially available, as well as novel single compound NIR absorbing pigments at a range of concentrations. The best four performing pigments were taken forward for inclusion in a polyurethane clear coat system. This work revealed that the method of processing the pigments into the paint had a large effect on coating performance, particularly for the nano powders. A single pigment, the Cesium Tungsten Oxide Nano Powder (Cs0.33WO3) was selected for the final stages of this research due to its combination of excellent NIR absorption and relatively low visual absorption and therefore ΔE. This was added to the clear coat and colour coat of two light coloured paints and produced promising results, especially for the darker of the two colours. The results of outdoor testing also helped to reveal where in the coating structure the pigment was most effective. Finally, using the UV/Vis/NIR data and TSR calculations a simple assessment on the overall impact of these additions was made. This concluded that savings of 250 kWh (52 kg of CO2) could be made annually for an average UK home over a non NIR pigmented coating.
published_date 2022-04-26T04:17:38Z
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score 11.035874

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