Numerical Analysis of Heat Exchanger for Spray-Assisted Low-Temperature Desalination System
A numerical study for heat exchanger for spray-assisted low-temperature desalination system is presented for an existing low-temperature desalination unit at Arusha Technical College. This is aimed at recognizing the effect of mass flow and physical parameters like tube layout (diameter and length)...
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doaj-7cc3ac46c36245afa4bb1aa294fd042e2020-11-30T09:11:26ZengHindawi LimitedJournal of Energy2356-735X2314-615X2020-01-01202010.1155/2020/88444338844433Numerical Analysis of Heat Exchanger for Spray-Assisted Low-Temperature Desalination SystemAmour Othman Muhunzi0Yusufu Abeid Chande Jande1Revocatus Lazaro Machunda2Department of Materials and Energy Sciences and Engineering, The Nelson Mandela African Institution of Science and Technology, P.O. Box 447, Arusha, TanzaniaDepartment of Materials and Energy Sciences and Engineering, The Nelson Mandela African Institution of Science and Technology, P.O. Box 447, Arusha, TanzaniaDepartment of Environmental Sciences and Engineering, The Nelson Mandela African Institution of Science and Technology, P.O. Box 447, Arusha, TanzaniaA numerical study for heat exchanger for spray-assisted low-temperature desalination system is presented for an existing low-temperature desalination unit at Arusha Technical College. This is aimed at recognizing the effect of mass flow and physical parameters like tube layout (diameter and length) on the overall heat transferred and the pressure drop in the shell-and-tube heat exchanger (STHX), as well as the impact of these parameters on the heat transfer coefficient and the overdesign of the STHX. Also, the study provides a suitable mathematical model for the replacement of the current condensation unit which tends to reduce energy consumption by reducing some of the electrical components in the system. A Math CAD model was developed using the Delaware method to obtain the mentioned parameters. The results show that at 0.8 kg/s flow rate a maximum heat transfer coefficient of 23212 W/m2K is achieved in a minimum diameter of 10 mm within a maximum tube length of 1000 mm heat exchanger and the pressure drop seems to be very low in a range of 0.328-0.957 Pa from all configurations. The configuration with 1000 mm tube length and 10 mm diameter performed well on the mass flow of 0.3 kg/s-0.8 kg/s by providing a suitable overall heat transfer coefficient of 2306-2539 W/m2K, while 12.8 is a maximum overdesign coefficient achieved on 0.8 kg/s mass flow. The study results show the possibility of using STHX instead of the current condensation unit in implementing a proposed system layout with the minimum effect of energy consumption.http://dx.doi.org/10.1155/2020/8844433 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Amour Othman Muhunzi Yusufu Abeid Chande Jande Revocatus Lazaro Machunda |
spellingShingle |
Amour Othman Muhunzi Yusufu Abeid Chande Jande Revocatus Lazaro Machunda Numerical Analysis of Heat Exchanger for Spray-Assisted Low-Temperature Desalination System Journal of Energy |
author_facet |
Amour Othman Muhunzi Yusufu Abeid Chande Jande Revocatus Lazaro Machunda |
author_sort |
Amour Othman Muhunzi |
title |
Numerical Analysis of Heat Exchanger for Spray-Assisted Low-Temperature Desalination System |
title_short |
Numerical Analysis of Heat Exchanger for Spray-Assisted Low-Temperature Desalination System |
title_full |
Numerical Analysis of Heat Exchanger for Spray-Assisted Low-Temperature Desalination System |
title_fullStr |
Numerical Analysis of Heat Exchanger for Spray-Assisted Low-Temperature Desalination System |
title_full_unstemmed |
Numerical Analysis of Heat Exchanger for Spray-Assisted Low-Temperature Desalination System |
title_sort |
numerical analysis of heat exchanger for spray-assisted low-temperature desalination system |
publisher |
Hindawi Limited |
series |
Journal of Energy |
issn |
2356-735X 2314-615X |
publishDate |
2020-01-01 |
description |
A numerical study for heat exchanger for spray-assisted low-temperature desalination system is presented for an existing low-temperature desalination unit at Arusha Technical College. This is aimed at recognizing the effect of mass flow and physical parameters like tube layout (diameter and length) on the overall heat transferred and the pressure drop in the shell-and-tube heat exchanger (STHX), as well as the impact of these parameters on the heat transfer coefficient and the overdesign of the STHX. Also, the study provides a suitable mathematical model for the replacement of the current condensation unit which tends to reduce energy consumption by reducing some of the electrical components in the system. A Math CAD model was developed using the Delaware method to obtain the mentioned parameters. The results show that at 0.8 kg/s flow rate a maximum heat transfer coefficient of 23212 W/m2K is achieved in a minimum diameter of 10 mm within a maximum tube length of 1000 mm heat exchanger and the pressure drop seems to be very low in a range of 0.328-0.957 Pa from all configurations. The configuration with 1000 mm tube length and 10 mm diameter performed well on the mass flow of 0.3 kg/s-0.8 kg/s by providing a suitable overall heat transfer coefficient of 2306-2539 W/m2K, while 12.8 is a maximum overdesign coefficient achieved on 0.8 kg/s mass flow. The study results show the possibility of using STHX instead of the current condensation unit in implementing a proposed system layout with the minimum effect of energy consumption. |
url |
http://dx.doi.org/10.1155/2020/8844433 |
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