Similitude modeling of natural convection heat transfer through an aperture in passive solar heated buildings

Weber, Dave

doi:10.2172/5415338

Cited by 15 publications

(2 citation statements)

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“…This study considers a situation in which different windows are opened for 15 min, three times a day. Airflows through the open windows are modeled using a two‐way flow model, with a neutral height (air can enter and exit at the same time), and a discharge coefficient of 0.78 as proposed by Weber and Kearney, 93 for an opening measuring 1.2 m × 1.35 m.…”

Section: Methodsmentioning

confidence: 99%

Role of ventilation on the transmission of viruses in buildings, from a single zone to a multizone approach

et al. 2022

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In a virus pandemic context, buildings ventilation has been recognized as a solution for preventing transmission of the virus in aerosolized form. The impact of the widespread recommendation of window opening and sealing door on ventilation circuits needs to be considered with a multizone approach. We modeled the airflow distribution in a building where people are isolating in a pandemic context, including one infected person. We analyzed the impact of opening the window and sealing the door in the quarantine room on exposures and probability of infection for occupants of the flat and of adjacent flats. In order to study the sensitivity of the results, we tested three ventilation systems: balanced, exhaust‐only, and humidity‐based demand‐controlled, and several window‐ and door‐opening strategies. When the door of the quarantine room is sealed, we observe that opening the window in the quarantine room always results in increased exposure and probability of infection for at least one other occupant, including in neighbors' apartments. When all internal doors are opened, we observe moderate impacts, with rather an increase of exposure of the occupants of the same apartments and of their probability of infection, and a decrease for the occupants located in other apartments. Based on the analysis on the airflows distribution in this case study, we conclude that sealing the internal door has more influence than opening the window of the quarantine room, whatever the ventilation system. We observe that this widespread recommendation to open the window of a quarantine room and to seal the door is based on the consideration of a single zone model. We illustrate the importance of moving from such a single zone approach to a multizone approach for quantifying ventilation and airing impacts in multizone buildings as residences in order to prevent epidemics of viruses such as SARS‐CoV‐2. It highlights the need of air leakage databases.

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Section: Methodsmentioning

confidence: 99%

Role of ventilation on the transmission of viruses in buildings, from a single zone to a multizone approach

et al. 2022

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“…( A causa del largo tiempo de vida de una vivienda lo más importante es que las medidas de ahorro energético a largo plazo sean adoptadas de la forma más inmediata posible. Además, resulta menos rentable aplicar estas medidas a edificios antiguos que hacerlo en los de nueva construcción.Y, contrariamente a lo que se cree, se ha comprobado que los edificios de nueva construcción pueden ser diseñados de acuerdo a medidas de conservación de la energía, a igual o incluso menor coste, que los tradicionales [5][6][7].…”

Section: Qijunclassified

Simulación del comportamiento térmico de edificios : estudio de las prestaciones del código Passim : aplicación al conjunto bioclimático de Begues

Cendra Garreta

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Dentro del marco del proyecto promovido por la Generalitat de Catalunya de construcción de 20 viviendas solares en la localidad costera de Begues (Barcelona), se ha realizado un estudio de modelización del comportamiento térmico de tres de las topologías solares utilizadas (muro trombe, invernadero adosado y ganancias directas). <br/><br/>Para ello se utilizo el Código Passim de simulación del comportamiento térmico de edificios. La contrastación de los resultados obtenidos en el seguimiento del conjunto bioclimático de Begues con los del modelo realizado mediante el Código Passim permite obtener interesantes conclusiones acerca de la capacidad de predicción del comportamiento térmico de edificios de este tipo de códigos de simulación. Una vez aceptada la fiabilidad de los modelos construidos, se realiza un estudio de la influencia que distintas variables tienen sobre el comportamiento térmico de esos edificios.<br/><br/>Finaliza el trabajo con una comparación de las tres topologías solares utilizadas, viéndose como la topología trombe, seguida de la de invernadero adosado, aventajan claramente a la de ganancias directas.

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Passive Solar Heating Research

Balcomb

1983

Advances in Solar Energy

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Similitude modeling of natural convection heat transfer through an aperture in passive solar heated buildings

Cited by 15 publications

References 0 publications

Role of ventilation on the transmission of viruses in buildings, from a single zone to a multizone approach

Role of ventilation on the transmission of viruses in buildings, from a single zone to a multizone approach

Simulación del comportamiento térmico de edificios : estudio de las prestaciones del código Passim : aplicación al conjunto bioclimático de Begues

Passive Solar Heating Research

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