Analytical solution for energy modeling of double skin façades building

Ghadamian, Hossein; Ghadimi, Mohammad; Shakouri, M.; Moghadasi, Meisam; Moghadasi, Mohammad

doi:10.1016/j.enbuild.2012.03.034

Cited by 38 publications

(13 citation statements)

References 7 publications

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“…From the practitioner side, Kragh reports numerical reductions within a 30%-40% range in two cases, one in the UK and one in Belgium [68,69]. Similar findings show reductions of 37.8% in Iran [57] and 38% by in central Korea [61]. It is worth noting that the two cases that showed negative performance on heating loads, perform instead very well when cooling is considered with basically identical values of 31.9% [77] and 32% [40] respectively.…”

Section: Coolingsupporting

confidence: 69%

“…Significant 50% and 40% reductions of heating loads have been found by Pappas [54] and Andjelkovic et al [55] respectively, due to the greenhouse effect when DSFs are compared to single skin solutions. Similarly, results in this range have been obtained by Choi et al [56] in Korea, Ghadamian et al [57] in Iran, Gratia and De Herde [58] in Belgium, Blumenberg et al [59] in Germany and Austria, and Fallahi et al [60] in a lab-based experiment. It is worth mentioning that DSFs suggested significant energy savings, even within a renovation or refurbishment context, of 38% in case of a residential building studied by Kim et al [61], and of 45% in an office building analysed by Cakmanus [62].…”

Section: Heatingmentioning

confidence: 50%

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Energy performance of Double-Skin Façades in temperate climates: A systematic review and meta-analysis

Pomponi

Piroozfar

Southall

et al. 2016

Renewable and Sustainable Energy Reviews

119

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Double Skin Façades (DSFs) are applied in both new and existing buildings, especially in temperate climates. Research in this area is steadily growing; however, there is a lack of conclusive results in available literature about energy performances related to the DSF, thus limiting a better and more informed application of this technology in the Architecture Engineering and Construction (AEC) sector. This paper systematically reviews more than 50 articles which have dealt with the energy related performance of DSFs in temperate climates and provide a meta-analysis of the numerical findings published in the studies examined. Energy related figures are presented separately for embodied and operational energy. Specifically, the operational energy end-uses taken into account are heating, cooling, lighting, and ventilation. Numerical results in the literature are normalised and expressed in form of percentage of maximum energy reduction/increment compared to a base case (e.g. a single skin case) used as a reference in the corresponding studies. Such an approach is meant to provide a reliable comparison of published figures. Key façade parameters (DSF spatial configurations, cavity width and ventilation), building parameters (orientation and climatic areas) and the methodological approaches used in the reviewed studies were deployed as clustering criteria. Several clustering criteria present extremely spread values, indicating the necessity to further investigate, understand, and attempt to reduce such high discrepancies in operational energy performances. Additionally, and more importantly, almost no information exists on DSFs life cycle energy figures, highlighting an important gap that requires further research.Suggested Reviewers: Mohamad Kiani PhD Principal Sustainability Consultant, Baily Garner LLP mohamadrezakiani@gmail.com Dr Kiani has extensive experience in sustainability in the construction industry. Additionally, his PhD thesis dealt with the environmental impacts of glazed facades which is a part of the review paper here submitted. AbstractDouble Skin Façades (DSFs) are applied in both new and existing buildings, especially in temperate climates. Research in this area is steadily growing; however, there is a lack of conclusive results in available literature about energy performances related to the DSF, thus limiting a better and more informed application of this technology in the Architecture Engineering and Construction (AEC) sector. This paper systematically reviews more than 50 articles which have dealt with the energy related performance of DSFs in temperate climates and provide a meta-analysis of the numerical findings published in the studies examined. Energy related figures are presented separately for embodied and operational energy. Specifically, the operational energy end-uses taken into account are heating, cooling, lighting, and ventilation. Numerical results in the literature are normalised and expressed in form of percentage of maximum energy reduction/increment compared to a ba...

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Section: Coolingsupporting

confidence: 69%

Section: Heatingmentioning

confidence: 50%

Energy performance of Double-Skin Façades in temperate climates: A systematic review and meta-analysis

Pomponi

Piroozfar

Southall

et al. 2016

Renewable and Sustainable Energy Reviews

119

View full text Add to dashboard Cite

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“…A numerical model was developed to simulate the steady state forced convection inside the DSF cavity after the verification of the numerical studies by using data from This constructed non-dimensional heat transfer correlation given in Equation (12) can be used to investigate energy analysis of a DSF under defined geometric features and working conditions in this study. This kind of correlations are widely used to identify the convection coefficients of the inner cavity surfaces in the literature [5,[24][25][26][27][28]. These correlations are valid under fully developed flow conditions which are the main difference from the current study valid for the entrance region condition hydrodynamically and thermally.…”

Section: Discussionmentioning

confidence: 99%

Experimental and Numerical Investigation of Forced Convection in a Double Skin Façade

2017

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Flow and heat transfer of the air cavity between two glass façades designed in the box window type of double skin façade (DSF) was evaluated in a test room which was set up for measurements in the laboratory environment and analyzed under different working conditions by using a computational fluid dynamics tool. Using data from the experimental studies, the verification of the numerical studies was conducted and the air flow and heat transfer in the cavity between the two glass façades were examined numerically in detail. The depth to height of the cavity, the aspect ratio, was changed between 0.10 and 0.16, and was studied for three different flow velocities. Reynolds and average Nusselt numbers ranging from 28,000 to 56,500 and 134 to 272, respectively, were calculated and a non-dimensional correlation between Reynolds and Nusselt numbers was constructed to evaluate the heat transfer from the cavity (except inlet and outlet sections) air to the inside environment and it could be used the box window type of DSF applications having relatively short cavities.

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“…Dependent variables, which are defined based on independent variables, are listed as Table 7. The point that should be noted is that all independent and dependent variables are positive and the only objective function variable (Q) is of free type variable [12][13][14].…”

Section: Independent and Dependent Variablesmentioning

confidence: 99%

Optimal Design for Compact Heat Exchanger (Che) by Heat Transfer Viewpoint as an Air Pre-Heater

2015

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In the provided research, the design of CHE (Compact Heat Exchanger) is evaluated and discussed from the heat transfer aspect. Benefiting from present equations and considering the objective concepts, the procedural chart is proposed for achieving optimal design. The main goal of this research study is implementing a new algorithm for optimization to modify a conventional design of CHE. Nonlinear gradient mathematical modeling with different scenarios on free or related variables is developed to cover the purpose of maximizing total heat transfer capacity. By mathematical programming analysis, a model has been provided for optimal design and developed in the GAMS (Generalized Algebraic Modelling System) software. Also for further model test rig development purpose, the proposed model has been incorporated in Matlab software using independent variants and the accuracy of the responses was again evaluated. The comparison indicated 109W/K difference in the exchanged thermal energy rate compared to the optimal exchanger operation conditions. After introducing case study to this model, an acceptable response with 0.997W/K difference on optimal point was achieved. Solving the model indicated 0.833W/K difference with the optimal point, which confirms the resulted technical responses.

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Analytical solution for energy modeling of double skin façades building

Cited by 38 publications

References 7 publications

Energy performance of Double-Skin Façades in temperate climates: A systematic review and meta-analysis

Energy performance of Double-Skin Façades in temperate climates: A systematic review and meta-analysis

Experimental and Numerical Investigation of Forced Convection in a Double Skin Façade

Optimal Design for Compact Heat Exchanger (Che) by Heat Transfer Viewpoint as an Air Pre-Heater

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