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Numerical investigation on the effect of varying the number of flow dividers on Z- Shaped membrane heat exchanger performance

To reduce building energy consumption and to improve indoor air quality, it is necessary the use heat recovery such as air-to-air fixed-plates enthalpy heat exchanger in mechanical ventilation. Prediction of enthalpy performance by utilizing CFD simulation is challenging since most commercial softwa...

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Main Authors: Nasif M.S., Al-Waked R., Ismail F.
Other Authors: 55188481100
Format: Article
Published: Penerbit UTM Press 2023
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spelling my.uniten.dspace-256212023-05-29T16:11:49Z Numerical investigation on the effect of varying the number of flow dividers on Z- Shaped membrane heat exchanger performance Nasif M.S. Al-Waked R. Ismail F. 55188481100 8972723200 58027086700 To reduce building energy consumption and to improve indoor air quality, it is necessary the use heat recovery such as air-to-air fixed-plates enthalpy heat exchanger in mechanical ventilation. Prediction of enthalpy performance by utilizing CFD simulation is challenging since most commercial software do not simulate moisture transfer. In this research, a Z-shaped membrane heat exchanger which is used for building energy recovery systems was modeled by using commercial CFD software (FLUENT). Kraft paper of 45 gsm was used as the heat exchanger heat and moisture transfer surface. A User Define Function (UDF) code was developed and incorporated in the CFD software to enable the software to model moisture transfer through the membrane. This model is used to investigate the performance of Z-Shaped heat exchanger when the number of flow dividers within the heat exchanger is varied. It was found that a 21 % increase in the effectiveness was achieved when the number of ribs was increased from no ribs to 5 ribs. However, increasing the number of ribs from 5 to 11 only demonstrates minor effect. Therefore, no significant improvement is noticed when the number of ribs is increased beyond 5 which is attributed to air flow distribution which because more uniform when number of ribs is increased. However, the flow is already uniform when 5 ribs where used, hence increasing the ribs to 11 will not improve the flow distribution further. � 2021 Malaysian Journal of Fundamental and Applied Sciences. All Rights Reserved. Final 2023-05-29T08:11:48Z 2023-05-29T08:11:48Z 2020 Article 10.11113/mjfas.v16n1.1642 2-s2.0-85103188530 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85103188530&doi=10.11113%2fmjfas.v16n1.1642&partnerID=40&md5=c9befdde8ce3db11804b1e265a326ad7 https://irepository.uniten.edu.my/handle/123456789/25621 16 1 85 89 All Open Access, Gold Penerbit UTM Press Scopus
institution Universiti Tenaga Nasional
building UNITEN Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tenaga Nasional
content_source UNITEN Institutional Repository
url_provider http://dspace.uniten.edu.my/
description To reduce building energy consumption and to improve indoor air quality, it is necessary the use heat recovery such as air-to-air fixed-plates enthalpy heat exchanger in mechanical ventilation. Prediction of enthalpy performance by utilizing CFD simulation is challenging since most commercial software do not simulate moisture transfer. In this research, a Z-shaped membrane heat exchanger which is used for building energy recovery systems was modeled by using commercial CFD software (FLUENT). Kraft paper of 45 gsm was used as the heat exchanger heat and moisture transfer surface. A User Define Function (UDF) code was developed and incorporated in the CFD software to enable the software to model moisture transfer through the membrane. This model is used to investigate the performance of Z-Shaped heat exchanger when the number of flow dividers within the heat exchanger is varied. It was found that a 21 % increase in the effectiveness was achieved when the number of ribs was increased from no ribs to 5 ribs. However, increasing the number of ribs from 5 to 11 only demonstrates minor effect. Therefore, no significant improvement is noticed when the number of ribs is increased beyond 5 which is attributed to air flow distribution which because more uniform when number of ribs is increased. However, the flow is already uniform when 5 ribs where used, hence increasing the ribs to 11 will not improve the flow distribution further. � 2021 Malaysian Journal of Fundamental and Applied Sciences. All Rights Reserved.
author2 55188481100
author_facet 55188481100
Nasif M.S.
Al-Waked R.
Ismail F.
format Article
author Nasif M.S.
Al-Waked R.
Ismail F.
spellingShingle Nasif M.S.
Al-Waked R.
Ismail F.
Numerical investigation on the effect of varying the number of flow dividers on Z- Shaped membrane heat exchanger performance
author_sort Nasif M.S.
title Numerical investigation on the effect of varying the number of flow dividers on Z- Shaped membrane heat exchanger performance
title_short Numerical investigation on the effect of varying the number of flow dividers on Z- Shaped membrane heat exchanger performance
title_full Numerical investigation on the effect of varying the number of flow dividers on Z- Shaped membrane heat exchanger performance
title_fullStr Numerical investigation on the effect of varying the number of flow dividers on Z- Shaped membrane heat exchanger performance
title_full_unstemmed Numerical investigation on the effect of varying the number of flow dividers on Z- Shaped membrane heat exchanger performance
title_sort numerical investigation on the effect of varying the number of flow dividers on z- shaped membrane heat exchanger performance
publisher Penerbit UTM Press
publishDate 2023
_version_ 1806428502314975232
score 13.222552

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