Defining the cooling and heating solar efficiency of a building component skin: application to a modular living wall

Azkorra-Larrinaga, Zaloa; Erkoreka, Aitor; Flores-Abascal, Iván; Pérez-Iribarren, Estibaliz; Romero-Antón, Naiara

doi:10.1016/j.applthermaleng.2022.118403

Cited by 8 publications

(3 citation statements)

References 45 publications

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“…The concept of plant cover efficiency is applied whereby the thermal performance of plant cover for specific environmental conditions can be quantified in a simple way. In this study [68], in the energy balance of the outermost layer of the building it was shown that, since the qcond value is negligible compared to the sum of the values of shortwave radiation, longwave radiation and convective heat exchange occur in the outermost layer of the roof or façade. In this way, it is possible to accurately estimate the value of the temperature in the outer layer (T g ) by simply applying the energy balance at the outermost surface of the building envelope, without taking into account the term qcond in the energy balance when solar radiation is present.…”

Section: Calculation Of Green Cover Efficiencymentioning

confidence: 91%

Environmentally Sustainable Green Roof Design for Energy Demand Reduction

et al. 2023

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Green roofs are artificial ecosystems that provide a nature-based solution to environmental problems such as climate change and the urban heat island effect by absorbing solar radiation and helping to alleviate urban environmental, economic, and social problems. Green roofs offer many benefits in terms of heat and water conservation as well as in terms of energy costs. This work proposes the design of an extensive and environmentally sustainable green roof for the Faculty of Engineering building in Bilbao. The green roof will be made from the composting of food waste generated in the building’s own canteen. Therefore, the main objective of this study is to calculate the solar efficiency of a sustainable green roof, evaluate its thermal performance, and quantify the impact that its implementation would have on energy consumption and the thermal comfort of its users. The results obtained confirm that an environmentally sustainable green roof has a positive effect on summer energy consumption and that this effect is much greater when there is water on the roof, as shown by the difference in energy savings between the dry (−53.7%) and wet (−84.2%) scenarios. The data show that in winter the differences between a green roof and a non-vegetated roof are not significant. In this case, the estimated energy consumption penalty (0.015 kWh/m2) would be 10% of the summer gain.

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Section: Calculation Of Green Cover Efficiencymentioning

confidence: 91%

Environmentally Sustainable Green Roof Design for Energy Demand Reduction

et al. 2023

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“…The presence of vegetation on facades can minimize heat transfer via shading effects, the insulating properties of vegetation layers, and the prevention of wind along building surfaces. This ultimately results in a reduction in the need for cooling and heating within structures [38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Thermal Performance of Two Passive Facade System Solutions for Sustainable Development

Azkorra-Larrinaga,

Romero-Antón,

Martín-Escudero

et al. 2023

Sustainability

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Sustainable development is essential for the future of the planet. Using passive elements, like ventilated facades based on insulation and air chambers, or living walls, which are solutions based on nature, is a powerful strategy for cities to improve their thermal environment, reduce energy consumption, and mitigate the effects of climate change. This approach allows for the quantification of the influence of passive surfaces on energy fluxes compared to bare surfaces. In addition, it delves into understanding how the incorporation of vegetation on building facades alters surface energy fluxes, involving a combination of physical and biochemical processes. This comprehensive investigation seeks to harness the potential of passive and natural solutions to address the pressing challenges of urban sustainability and climate resilience. This research uses a surface energy balance model to analyze the thermal performance of two facades using experimental data from a PASLINK test cell. This study uses the grey box RC model, which links continuous-time ordinary differential equations with discrete measurement data points. This model provides insight into the complex interplay among factors that influence the thermal behavior of building facades, with the goal of comprehensively understanding how ventilated and green facades affect the dynamics of energy flow compared to conventional facades. The initial thermal resistance of the bare facade was 0.75 (°C m2)/W. The introduction of a ventilated facade significantly increased this thermal resistance to 2.47 (°C m2)/W due to the insulating capacity of the air chamber and its insulating layer (1.70 (°C m2)/W). Regarding the modular living wall, it obtained a thermal resistance value of 1.22 (°C m2)/W (this vegetated facade does not have an insulating layer). In this context, the modular living wall proved to be effective in reducing convective energy by 68% compared with the non-green facade. It is crucial to highlight that evapotranspiration was the primary mechanism for energy dissipation in the green facade. The experiments conclusively show that both the modular living wall and open-ventilated facade significantly reduce solar heat loads compared with non-passive bare wall facades, demonstrating their effectiveness in enhancing thermal performance and minimizing heat absorption.

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“…Landaredun fatxadak hiri-ingurunerako estrategia jasangarri baten parte izan daitezke [1]. Izan ere, landaretza hiriguneetan integratzeak hainbat ingurumen-onura ditu [2] eta honako hobekuntza hauek eragiten ditu: airearen kalitatea hobetzea [3] CO 2 xurgatuz [4] eta hauts partikulak eta metal astunak atxikiz [5]; hiriko bero-uhartearen efektua arintzea [13] eta, ondorioz, tokiko klima-baldintzetan eragitea (tenperatura eta hezetasun aldetik); hiriko zarata murriztea eta xurgatzea [6] eta biodibertsitatea handi tzea [7,8]. Aldi berean, landaretza hiri-ingurunean integratzeak eragin positiboa du gizakien osasunean, eta onurak ekonomian.…”

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Eraikin pasiboen karakterizazio termikoa: landare-fatxada modular baten kasu-azterketa

Azkorra Larrinaga,

Martín-Escudero,

Romero-Antón

2023

EKAIA

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Sistema berdeak sendotzen ari dira hirietako eskari termikoa murrizteko eta, aldi berean, hiriko bizitzaren kalitatea hobetzeko. Sistema berdeei lotutako onurak hainbat dira: biodibertsitatea handitzea, ekaitz-uren kontrola, energia aurreztea, tenperatura erregulatzea eta zarata arintzea. Landaredun sistema bertikalek errendimendu energetikoari egiten dioten ekarpenari buruzko ezagutza lortzeko, landaredun fatxada bati proba metodologikoak Paslink saiakuntza-zelula batean egin dira. Helburua landare-fatxada modular baten berokuntza- eta hozte-eskaria ezaugarritzea da. Emaitza nagusia isolamenduaren hobekuntza izan da. Erreferentziako fatxada 0.75 W/(m2 C) baliotik abiatzen zen, eta 1.22 W/(m2 C) -ko transmisio termikoko balioetara igaro zen landare-fatxadari esker; horrek esan nahi du isolamendu-ahalmena % 30 handitu zela. Fatxada berdeek energia aurrezteko potentzial handia dutela ondoriozta daiteke.

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Defining the cooling and heating solar efficiency of a building component skin: application to a modular living wall

Cited by 8 publications

References 45 publications

Environmentally Sustainable Green Roof Design for Energy Demand Reduction

Environmentally Sustainable Green Roof Design for Energy Demand Reduction

Evaluation of the Thermal Performance of Two Passive Facade System Solutions for Sustainable Development

Eraikin pasiboen karakterizazio termikoa: landare-fatxada modular baten kasu-azterketa

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