Influence of material choice, renovation rate, and electricity grid to achieve a Paris Agreement-compatible building stock: A Portuguese case study

Göswein, Verena; Silvestre, José Dinis; Monteiro, Cláudia; Habert, Guillaume; Freire, Fausto; Pittau, Francesco

doi:10.1016/j.buildenv.2021.107773

Cited by 37 publications

(24 citation statements)

References 38 publications

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“…The storage period for the calculation was assumed to be equal to the product's service life. In this case, two values of reference service life were assumed for a typical installation of bio-based materials as ETICS, namely, 30 years [51] and 60 years [52].…”

Section: Lci Inventory Assessmentmentioning

confidence: 99%

Carbon Footprint Assessment of a Novel Bio-Based Composite for Building Insulation

et al. 2022

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This research explores the carbon removal of a novel bio-insulation composite, here called MycoBamboo, based on the combination of bamboo particles and mycelium as binder. First, an attributional life cycle assessment (LCA) was performed to define the carbon footprint of a European bamboo plantation and a bio-insulation composite, as well as its ability to remove CO2 along its lifecycle at a laboratory scale. Secondly, the Global Worming Potential (GWP) was estimated through a dynamic LCA with selected end-of-life and technical replacement scenarios. Finally, a building wall application was analyzed to measure the carbon saving potential of the MycoBamboo when compared with alternative insulation materials applied as an exterior thermal insulation composite system. The results demonstrate that despite the negative GWP values of the biogenic CO2, the final Net-GWP was positive. The technical replacement scenarios had an influence on the final Net-GWP values, and a longer storage period is preferred to more frequent insulation substitution. The type of energy source and the deactivation phase play important roles in the mitigation of climate change. Therefore, to make the MycoBamboo competitive as an insulation system at the industrial scale, it is fundamental to identify alternative low-energy deactivation modes and shift all energy-intensity activities during the production phase to renewable energy.

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Section: Lci Inventory Assessmentmentioning

confidence: 99%

Carbon Footprint Assessment of a Novel Bio-Based Composite for Building Insulation

et al. 2022

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“…As the temporal and spatial system boundaries chosen for inter-material comparative analyses remain of critical importance (Hoxha et al 2020), the functional unit should be used by design teams to perform informed assessments with exhaustive emission data covering the various material life-stages and processes contextually considered of significant importance (e.g. the analysis performed here misrepresents the considerable opportunity provided by materials such as OSSB made from otherwise burnt straw byproducts of the agro-industrial sector to momentarily store biogenic carbon in the building stock; Göswein et al 2021). Simplifying material assemblies through good thermal mass design enables an easier accounting and more reliable predictions of a building's embodied emissions, as well as an easier agency in sourcing the primary materials.…”

Section: Embodied Carbonmentioning

confidence: 99%

“…Examining the limits of carbon storage in construction materials at the regional level, within the sustainable capacity of ecosystems services, is crucial in light of the climate emergency. For instance, one study examining bio-based insulation materials for retrofitting the Portuguese building stock highlighted the potential of straw-based insulation, not only because fast-growing biomass can sequester more carbon but also because of the current status and capacity of agricultural landscapes in Europe (Göswein et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Internal thermal mass for passive cooling and ventilation: adaptive comfort limits, ideal quantities, embodied carbon

Toldi

Craig

Sushama

2022

Buildings and Cities

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How effective is naturally ventilated internal thermal mass for obviating air-conditioning, mitigating heatwaves and storing carbon in buildings? This study combines detailed climate model outputs with scaling rules for optimizing internal thermal mass coupled with buoyancy ventilation. It identifies regions where this passive design strategy is most effective during future heatwaves and determines how much internal thermal mass each person needs to stay comfortable in these regions, with a special focus on Canada. Results suggest that naturally ventilated internal thermal mass is likely to become less effective due to future global heating. Regions where internal thermal mass will no longer be sufficient to obviate air-conditioning and where it can still play a significant role in hybrid cooling are identified. By comparing the ideal per capita thermal mass quantities in different regions, it is found that biomass-based materials require approximately 3.5 times the volume of cementitious materials to perform equivalently, if thermal proportions for surface area and thickness are respected. Finally, an analysis of the per capita embodied carbon of these ideal internal thermal mass quantities is undertaken, suggesting a fair functional unit to compare thermal mass materials.

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“…However, once operational emissions from buildings can be reduced to zero, the combined emissions from construction products and HVAC systems will become more important and will significantly impact the overall production of greenhouse gas emissions related to the building stock, as indicated by recent studies [29]. A good example of various material considerations in such analyses is presented in [55].…”

Section: Uncertaintiesmentioning

confidence: 99%

Czech Building Stock: Renovation Wave Scenarios and Potential for CO2 Savings until 2050

Lupíšek

Trubačík²,

Holub³

2021

Energies

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One of the major anthropogenic sources of greenhouse gases is the operation of building stock. Improving its energy efficiency has the potential to significantly contribute to achieving climate change mitigation targets. The purpose of this study was to roughly estimate such potential for the operation of the national building stock of Czechia to steer the national debate on the development of related national plans. The estimation is based on a simplified energy model of the Czech building stock that consists of sub-models of residential and nonresidential building stocks, for which their future energy consumptions, shares of energy carriers and sources, and emission factors were modeled in four scenarios. Uncertainties from the approximation of the emission factors were investigated in a sensitivity analysis. The results showed that the operation of the Czech building stock in 2016 totaled 36.9 Mt CO2, which represented 34.6% of the total national carbon dioxide emissions. The four building stock scenarios could produce reductions in the carbon dioxide emissions of between 28% and 93% by 2050, when also considering on-side production from photovoltaics. The implementation of the most ambitious scenario would represent a drop in national CO2 yearly emissions by 43.2% by 2050 (compared to 2016).

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Influence of material choice, renovation rate, and electricity grid to achieve a Paris Agreement-compatible building stock: A Portuguese case study

Cited by 37 publications

References 38 publications

Carbon Footprint Assessment of a Novel Bio-Based Composite for Building Insulation

Carbon Footprint Assessment of a Novel Bio-Based Composite for Building Insulation

Internal thermal mass for passive cooling and ventilation: adaptive comfort limits, ideal quantities, embodied carbon

Czech Building Stock: Renovation Wave Scenarios and Potential for CO2 Savings until 2050

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