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Open AccessArticle
Reducing the Cooling Energy Demand by Optimizing the Airflow Distribution in a Ventilated Roof: Numerical Study for an Existing Residential Building and Applicability Map
1
Department of Mechanics and Industrial Design, College of Engineering, University of Cadiz, 11510 Cádiz, Spain
2
Department of Machines and Thermal Motors, College of Engineering, University of Cadiz, 11510 Cádiz, Spain
3
Grupo Termotecnología, Dapartament of Engineering Energy, University of Seville, 41092 Seville, Spain
*
Author to whom correspondence should be addressed.
Appl. Sci. 2024, 14(15), 6596; https://doi.org/10.3390/app14156596 (registering DOI)
Submission received: 21 June 2024
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Revised: 21 July 2024
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Accepted: 22 July 2024
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Published: 28 July 2024
Abstract
This work presents a study of a ventilated hollow core slab system (VHCS) that obviates the need to completely replace the slab of an existing residential building. It is assimilated to a heat exchanger to allow its effectiveness to be studied as a function of the area and airflow rate. The balance between the energy consumed by the fan and the heat evacuated by the system is also studied through the use of the thermo-hydraulic performance factor (THPF), for which a series of cases were simulated by CFD following a methodology in which a configuration is achieved by means of the sequential analysis of cases in which both the thermal effectiveness and the THPF are maximized. The configuration chosen in this study was found to benefit from high airflow rates since, although this implies an increase in fan energy consumption, the increase in heat removed is proportionally greater. It has also been found that the design of the airflow distribution through the slab is of high importance as it affects both the heat exchanged with the slab and the pressure losses. An applicability map has been developed as a function of the temperature of the space below and the air temperature at the inlet of the ventilated roof. The heat flux per unit area that the studied envelope is able to evacuate is about 20 W/m K.
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MDPI and ACS Style
Rincón-Casado, A.; Rodríguez Jara, E.Á.; Ruiz Pardo, A.; Salmerón Lissén, J.M.; Sánchez de la Flor, F.J.
Reducing the Cooling Energy Demand by Optimizing the Airflow Distribution in a Ventilated Roof: Numerical Study for an Existing Residential Building and Applicability Map. Appl. Sci. 2024, 14, 6596.
https://doi.org/10.3390/app14156596
AMA Style
Rincón-Casado A, Rodríguez Jara EÁ, Ruiz Pardo A, Salmerón Lissén JM, Sánchez de la Flor FJ.
Reducing the Cooling Energy Demand by Optimizing the Airflow Distribution in a Ventilated Roof: Numerical Study for an Existing Residential Building and Applicability Map. Applied Sciences. 2024; 14(15):6596.
https://doi.org/10.3390/app14156596
Chicago/Turabian Style
Rincón-Casado, Alejandro, Enrique Ángel Rodríguez Jara, Alvaro Ruiz Pardo, José Manuel Salmerón Lissén, and Francisco José Sánchez de la Flor.
2024. "Reducing the Cooling Energy Demand by Optimizing the Airflow Distribution in a Ventilated Roof: Numerical Study for an Existing Residential Building and Applicability Map" Applied Sciences 14, no. 15: 6596.
https://doi.org/10.3390/app14156596
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