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Parametric study of an active-passive system for cooling application in buildings improved with free cooling for enhanced solidification
ID
Zavrl, Eva
(
Author
),
ID
Tomc, Urban
(
Author
),
ID
El Mankibi, Mohamed
(
Author
),
ID
Dovjak, Mateja
(
Author
),
ID
Stritih, Uroš
(
Author
)
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https://www.sciencedirect.com/science/article/pii/S2210670723005711
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Abstract
The present study introduces an active-passive system (APS) with phase change material (PCM) integrated into the substructure of the internal walls and ceiling for cooling. To ensure sufficient cooling effect of the system during the daytime cycle, the system must solidify completely during the nighttime cycle and operation costs comparable to the ones of conventional cooling systems. An air gap was formed between the primary wall and ceiling and the PCM substructure and ventilated with the cool outdoor air during the nighttime cycle. A parametric study was performed using ANSYS Fluent followed by the energy performance and operation cost analysis. Different inlet air temperature scenarios (15–20 °C) were tested (suitable PCM thermal characteristics). The required solidification-time of PCM was determined. The model is validated against the experimental tests. The results show that with the current configuration, the PCM plates can be sufficiently solidified at supply air temperatures of 17 °C and below. If the system is ventilated with inlet air temperatures above 17 °C, additional cooling options must be considered. The study also determines the energy performance of the system under the chosen conditions and compares its feasibility to the conventional cooling systems (energy efficiency class A+++ and G air-conditioning device).
Language:
English
Keywords:
night ventilation
,
phase change material
,
thermal energy storage
,
ventilated air gap
,
PCM integrated building elements
,
computational fluid dynamics
Work type:
Article
Typology:
1.01 - Original Scientific Article
Organization:
FS - Faculty of Mechanical Engineering
FGG - Faculty of Civil and Geodetic Engineering
Publication status:
Published
Publication version:
Version of Record
Year:
2023
Number of pages:
18 str.
Numbering:
Vol. 99, art. 104960
PID:
20.500.12556/RUL-152783
UDC:
697:621.5
ISSN on article:
2210-6715
DOI:
10.1016/j.scs.2023.104960
COBISS.SI-ID:
166103555
Publication date in RUL:
06.12.2023
Views:
419
Downloads:
57
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Record is a part of a journal
Title:
Sustainable cities and society
Publisher:
Elsevier
ISSN:
2210-6715
COBISS.SI-ID:
16177461
Licences
License:
CC BY-NC 4.0, Creative Commons Attribution-NonCommercial 4.0 International
Link:
http://creativecommons.org/licenses/by-nc/4.0/
Description:
A creative commons license that bans commercial use, but the users don’t have to license their derivative works on the same terms.
Secondary language
Language:
Slovenian
Keywords:
nočno prezračevanje
,
fazno spremenljivi materiali
,
zalogovnik toplote
,
prezračevana zračna reža
,
PCM integrirani v stavbne elemente
,
računalniška dinamika tekočin
Projects
Funder:
ARRS - Slovenian Research Agency
Project number:
P2-0223
Name:
Prenos toplote in snovi
Funder:
ARRS - Slovenian Research Agency
Project number:
P2-0158
Name:
Gradbene konstrukcije in gradbena fizika
Funder:
ARRS - Slovenian Research Agency
Project number:
P2-0422
Name:
Funkcionalne tekočine za napredne energetske sisteme
Funder:
Other - Other funder or multiple funders
Funding programme:
Région Auvergne-Rhône-Alpes
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