Detailed and simplified window model and opening effects on optimal window size and heating need

Thalfeldt, Martin; Kurnitski, Jarek; Voll, Hendrik

doi:10.1016/j.enbuild.2016.06.002

Cited by 20 publications

(7 citation statements)

References 16 publications

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“…On the one hand, increasing the size of windows will benefit the daylight availability [20]. At the same time, this will inevitably increase the amount of energy lost through the window [21]. As such, window properties, size and position are three highly interrelated parameters that would affect available natural daylight and heat transfer through windows [22].…”

Section: Introductionmentioning

confidence: 99%

Optimising Window Design on Residential Building Facades by Considering Heat Transfer and Natural Lighting in Nontropical Regions of Australia

et al. 2020

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Windows account for a significant proportion of the total energy lost in buildings. The interaction of window type, Window-to-Wall Ratio (WWR) scheduled and window placement height influence natural lighting and heat transfer through windows. This is a pressing issue for nontropical regions considering their high emissions and distinct climatic characteristics. A limitation exists in the adoption of common simulation-based optimisation approaches in the literature, which are hardly accessible to practitioners. This article develops a numerical-based window design optimisation model using a common Building Information Modelling (BIM) platform adopted throughout the industry, focusing on nontropical regions of Australia. Three objective functions are proposed; the first objective is to maximise the available daylight, and the other two emphasize undesirable heat transfer through windows in summer and winter. The developed model is tested on a case study located in Sydney, Australia, and a set of Pareto-optimum solutions is obtained. Through the use of the proposed model, energy savings of up to 8.57% are achieved.

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Section: Introductionmentioning

confidence: 99%

Optimising Window Design on Residential Building Facades by Considering Heat Transfer and Natural Lighting in Nontropical Regions of Australia

et al. 2020

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“…Las ventanas son protagonistas en los intercambios térmicos y lumínicos entre el exterior y los espacios interiores de los edificios, y por ello impactan de manera significativa en las demandas energéticas para calefacción, refrigeración e iluminación de los mismos (Alam y Islam, 2016;Sharda y Kumar, 2016;Thalfeldt, Kurnitski y Voll, 2016;Alwetaishi, 2017;Trzaski y Rucinska, 2015). Los índices que caracterizan estos flujos energéticos a través de las ventanas son la transmitancia térmica (K, también comúnmente designada por la letra U), el factor solar (FS) y la transmitancia visible (TV).…”

Section: Introductionunclassified

Propiedades energéticas de tecnologías de ventanas en Argentina

Gastines

Pattini

2019

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RESUMENLas ventanas influyen de manera significativa en las demandas energéticas para calefacción, refrigeración e iluminación de los edificios. En este trabajo, se caracterizan las propiedades energéticas de las tecnologías de ventanas disponibles en Argentina, mediante el cálculo de sus índices K, FS y TV (transmitancia térmica, factor solar y transmitancia visible). Se analiza, además, el impacto que tienen diversos parámetros, como las dimensiones de la abertura, la tipología, el material y la absortancia solar del marco, sobre los índices mencionados. Los casos de estudio se seleccionaron cuidadosamente para asegurar una buena representatividad de la muestra analizada, utilizando, en particular, el método de análisis de conglomerados. El cálculo de los índices se realizó con el apoyo de los programas WINDOW 6.3 y THERM 6.3. Los resultados indican que los valores de K están comprendidos entre 1.88 y 6.00 W/m2K, mientras que los valores de FS varían entre 0.08 y 0.80, y los de TV entre 0.03 y 0.80, según el material del marco, la tipología y el tipo de vidriado.Palabras clave ventanas, índices, energía, desempeño, simulación. ABSTRACTWindows significantly impact the energy demand for heating, cooling and lighting in buildings. This study characterizes the energy properties of window technologies available in Argentina by calculating their thermal transmittance (U), solar heat gain coefficient (SHGC) and visible transmittance (VT). Additionally, the impact of different parameters like window opening dimensions, typology, frame material and solar absorptance on the mentioned indices is analyzed. Case studies were selected carefully using cluster analysis methods in order to ensure that the sample examined was representative. The calculation of the U, SHGC and VT indices was carried out using WINDOW 6.3 and THERM 6.3 software. The results indicate that U-values are between 1.88 and 6.00 W/m2K, while SHGC values vary between 0.08 and 0.80, and VT values are between 0.03 and 0.80, depending on frame material, typology and glazing characteristics.

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“…Additionally there were translucent external walling constructions investigated including the modeling of the impact of their design on the heating load of the building (Thalfeldt et al, 2016). There are studies that evaluate and consider the amount of air passing through open windows with different types of opening (Cruz and Viegas, 2016).…”

Section: Introductionmentioning

confidence: 99%

Development and Research of an Intelectual Power System for Controlling Microclimate in Buildings

Kovalnogov

Chamchiyan

2016

Inter J Ener Clean Env

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The study covers a complex of problems related to systems analysis, modeling, research, and development of effi cient power systems to ensure building microclimate with insulated windows of increased tightness. Only insulated windows with a plastic frame (PVC windows) are considered. Some researchers provide an analysis of the results of building energy-saving potential of the microclimate control systems. The study includes modeling and research of ventilation modes and thermal control in a building with PVC windows of increased tightness using a self-designed mathematical apparatus and soft ware. It is shown that the real cost of thermal energy provided by the installation of PVC windows is reduced due to the latent heat loss associated with the growth of the ventilation load to ensure a comfortable microclimate. The research off ers a way and conditions of the fullest realization of technical and economic benefi ts off ered by PVC windows.

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Detailed and simplified window model and opening effects on optimal window size and heating need

Cited by 20 publications

References 16 publications

Optimising Window Design on Residential Building Facades by Considering Heat Transfer and Natural Lighting in Nontropical Regions of Australia

Optimising Window Design on Residential Building Facades by Considering Heat Transfer and Natural Lighting in Nontropical Regions of Australia

Propiedades energéticas de tecnologías de ventanas en Argentina

Development and Research of an Intelectual Power System for Controlling Microclimate in Buildings

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