Natural convection heat transfer in isosceles prismatic roof with perforated partition and phase change material
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27650%2F24%3A10254426" target="_blank" >RIV/61989100:27650/24:10254426 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S2451904924000465" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2451904924000465</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.tsep.2024.102428" target="_blank" >10.1016/j.tsep.2024.102428</a>
Alternative languages
Result language
angličtina
Original language name
Natural convection heat transfer in isosceles prismatic roof with perforated partition and phase change material
Original language description
In this work, both numerical and experimental studies are conducted to predict the natural convection heat transfer characteristics in the isosceles prismatic roof with the perforated partition and phase change material. This study can provide energy-saving methods for the design of passive buildings, responding to the increasingly tense energy crisis. Through post-processing, the effects of tilt angle (θ=30oand45o), partition perforation size (φp=0.014mand0.024m), and volume of paraffin (Vpcm=0m3and1.1x10-4m3) on the flow field inside the triangular cavity were investigated. The CFD results of different turbulence models are compared with the measured temperature data to achieve the most suitable turbulence model. By comparing the heat transfer coefficient calculated by the empirical formula with the numerical results of various turbulent models, it can be found that the error of the zero equation model is the smallest. The root mean square error (RMSE) between the numerical and the experimental results is only 0.6 %, so this turbulent flow model is used for the subsequent analysis in this study. The results also showed that the heat convection coefficient of the large inclination angle is about 10 % higher than that of the small inclination angle, and the velocity of the flow at the top of the partition is significantly improved, and the convection effect is better. The perforation of the partition forms the chimney effect and causes obvious updraft. The heat transfer from the air to the PCM is not as expected, and the effectiveness of the PCM is minimal. (C) 2024 Elsevier Ltd
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20500 - Materials engineering
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Thermal Science and Engineering Progress
ISSN
2451-9049
e-ISSN
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Volume of the periodical
48
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
11
Pages from-to
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UT code for WoS article
001180051000001
EID of the result in the Scopus database
2-s2.0-85183861115