Self cleaning characterization with the incorporation of titanium dioxide and aurum bimetallic nanoparticles in tellurite glasses

There are several drawbacks remain to be resolved for the application of solar dryer in fish drying, such include low solar intensity, uniformity of heat distribution, and inadequate air circulation. In this present study, a mixed mode type solar dryer namely, Integrated Solar Dryer (INSOLER) was pr...

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Main Author:	Auni mardhiah machinin
Format:	Thesis
Language:	English English
Published:	2023
Subjects:	QC1-75 General
Online Access:	https://eprints.ums.edu.my/id/eprint/40558/1/24%20PAGES.pdf https://eprints.ums.edu.my/id/eprint/40558/2/FULLTEXT.pdf
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spelling	my-ums-ep.405582024-09-27T00:38:27Z Self cleaning characterization with the incorporation of titanium dioxide and aurum bimetallic nanoparticles in tellurite glasses 2023 Auni mardhiah machinin QC1-75 General There are several drawbacks remain to be resolved for the application of solar dryer in fish drying, such include low solar intensity, uniformity of heat distribution, and inadequate air circulation. In this present study, a mixed mode type solar dryer namely, Integrated Solar Dryer (INSOLER) was presented and the performance under pseudo natural convection was studied through Computational Fluid Dynamics (CFD) simulation under inlet mass flow rate of 0.012 kg/s and solar irradiance of 438.58 W/m2. In this solar dryer, enhancement was proposed on the design of solar heat collector, air distribution system, and chimney, which governs the temperature, uniformity, and air circulation, respectively, to address the limitation mentioned. The main purpose of this research is to address the gaps in the design of these components and identify the improvements in term of heat transfer and fluid flow characteristics. The first objective of this work aimed to determine the performance of baffle-type solar heat collector (B-SHC) with different baffle arrangement, namely longitudinal SHC (L-SHC) and transversal SHC (T-SHC). It was found that L-SHC offers higher outlet temperature, collector efficiency, and thermo-hydraulic performance factor (THPF) of 59.43 °C, 46.2% and 2.1, respectively, indicating flow resistant presence in the air passage of longitudinal arrangement does not outweigh the enhancement of heat transfer in the collector. To ensure uniform heat distribution across the drying house, air distribution system with different perforation direction – upward and downward, was proposed. The latter configuration was proposed to address potential faulty operation caused by moisture accumulation and to ensure maximum heat transfer enhancement in the solar dryer. As expected, this perforation demonstrated more uniform temperature profile with p-value greater than 0.01 across different tray level and exhibits superior performance with heat transfer enhancement factor of 1.09. Followed by, three different chimney placement – exterior chimney, interior chimney, and interior chimney with perforation, were evaluated in term of the temperature distribution and the velocity profile attained across the drying house. Interior chimney was proposed to prevent continuous outflow of air which ultimately promotes heat accumulation in the dryer. Interior chimney with perforation demonstrated highest temperature with a value of 67 °C and the velocity profile obtained implied extended air residence time in the solar dryer due to the presence of greater air resistance. Lastly, INSOLER developed with the combination of these improvements offers drying temperature range suitable for the drying of fish (maximum temperature = 66 °C), uniform temperature profile across different tray level (p-value>0.01), and air circulation that promote heat accumulation in the drying area, which compensated the limitations of solar dryer mentioned earlier. For optimization purpose, the performance of INSOLER under different mass flow rate and solar irradiance was also studied. It was revealed that there is a difficulty in compromising between attaining allowable temperature range and better uniformity. With these findings obtained, this research could serve as a baseline study for the implementation of solar heat collector, air distribution, and chimney design covered in this work as a continuous effort for solar dryer enhancement to achieve sustainable development in food processing industry. 2023 Thesis https://eprints.ums.edu.my/id/eprint/40558/ https://eprints.ums.edu.my/id/eprint/40558/1/24%20PAGES.pdf text en public https://eprints.ums.edu.my/id/eprint/40558/2/FULLTEXT.pdf text en validuser masters Universiti Malaysia Sabah Faculty of Science and Natural Resources
institution	Universiti Malaysia Sabah
collection	UMS Institutional Repository
language	English English
topic	QC1-75 General
spellingShingle	QC1-75 General Auni mardhiah machinin Self cleaning characterization with the incorporation of titanium dioxide and aurum bimetallic nanoparticles in tellurite glasses
description	There are several drawbacks remain to be resolved for the application of solar dryer in fish drying, such include low solar intensity, uniformity of heat distribution, and inadequate air circulation. In this present study, a mixed mode type solar dryer namely, Integrated Solar Dryer (INSOLER) was presented and the performance under pseudo natural convection was studied through Computational Fluid Dynamics (CFD) simulation under inlet mass flow rate of 0.012 kg/s and solar irradiance of 438.58 W/m2. In this solar dryer, enhancement was proposed on the design of solar heat collector, air distribution system, and chimney, which governs the temperature, uniformity, and air circulation, respectively, to address the limitation mentioned. The main purpose of this research is to address the gaps in the design of these components and identify the improvements in term of heat transfer and fluid flow characteristics. The first objective of this work aimed to determine the performance of baffle-type solar heat collector (B-SHC) with different baffle arrangement, namely longitudinal SHC (L-SHC) and transversal SHC (T-SHC). It was found that L-SHC offers higher outlet temperature, collector efficiency, and thermo-hydraulic performance factor (THPF) of 59.43 °C, 46.2% and 2.1, respectively, indicating flow resistant presence in the air passage of longitudinal arrangement does not outweigh the enhancement of heat transfer in the collector. To ensure uniform heat distribution across the drying house, air distribution system with different perforation direction – upward and downward, was proposed. The latter configuration was proposed to address potential faulty operation caused by moisture accumulation and to ensure maximum heat transfer enhancement in the solar dryer. As expected, this perforation demonstrated more uniform temperature profile with p-value greater than 0.01 across different tray level and exhibits superior performance with heat transfer enhancement factor of 1.09. Followed by, three different chimney placement – exterior chimney, interior chimney, and interior chimney with perforation, were evaluated in term of the temperature distribution and the velocity profile attained across the drying house. Interior chimney was proposed to prevent continuous outflow of air which ultimately promotes heat accumulation in the dryer. Interior chimney with perforation demonstrated highest temperature with a value of 67 °C and the velocity profile obtained implied extended air residence time in the solar dryer due to the presence of greater air resistance. Lastly, INSOLER developed with the combination of these improvements offers drying temperature range suitable for the drying of fish (maximum temperature = 66 °C), uniform temperature profile across different tray level (p-value>0.01), and air circulation that promote heat accumulation in the drying area, which compensated the limitations of solar dryer mentioned earlier. For optimization purpose, the performance of INSOLER under different mass flow rate and solar irradiance was also studied. It was revealed that there is a difficulty in compromising between attaining allowable temperature range and better uniformity. With these findings obtained, this research could serve as a baseline study for the implementation of solar heat collector, air distribution, and chimney design covered in this work as a continuous effort for solar dryer enhancement to achieve sustainable development in food processing industry.
format	Thesis
qualification_level	Master's degree
author	Auni mardhiah machinin
author_facet	Auni mardhiah machinin
author_sort	Auni mardhiah machinin
title	Self cleaning characterization with the incorporation of titanium dioxide and aurum bimetallic nanoparticles in tellurite glasses
title_short	Self cleaning characterization with the incorporation of titanium dioxide and aurum bimetallic nanoparticles in tellurite glasses
title_full	Self cleaning characterization with the incorporation of titanium dioxide and aurum bimetallic nanoparticles in tellurite glasses
title_fullStr	Self cleaning characterization with the incorporation of titanium dioxide and aurum bimetallic nanoparticles in tellurite glasses
title_full_unstemmed	Self cleaning characterization with the incorporation of titanium dioxide and aurum bimetallic nanoparticles in tellurite glasses
title_sort	self cleaning characterization with the incorporation of titanium dioxide and aurum bimetallic nanoparticles in tellurite glasses
granting_institution	Universiti Malaysia Sabah
granting_department	Faculty of Science and Natural Resources
publishDate	2023
url	https://eprints.ums.edu.my/id/eprint/40558/1/24%20PAGES.pdf https://eprints.ums.edu.my/id/eprint/40558/2/FULLTEXT.pdf
_version_	1811770530585378816

Self cleaning characterization with the incorporation of titanium dioxide and aurum bimetallic nanoparticles in tellurite glasses

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