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Applied mathematics, Probability, Environmental sciences, Climatic research, Architecture engineering, Construction engineering, Energy and fuels
Although embodiedCO2-eq analysis has seen recent developments as evident in the establishment of the ISO14040 and 14044 LCA standards, it is recognized that due to weaknesses in gathering data on product-related emissions,embodiedCO2-eq values are probabilistic. This paper presents a stochastic analysis of hybrid embodied CO2-eq in buildings to account for this weakness in traditional methods and, by way of example, applies it to an Irish construction-sector case study. Using seven apartment buildings, 70,000 results are simulated with Monte Carlo analysis and used to derive probabilistic and cumulative embodied CO2-eq intensity distributions for apartment buildings in Ireland. A Wakeby distribution with known statistical parameters and uncertainty was derived for the average embodied CO2-eq intensity of apartment building in Ireland. The mean hybrid embodied CO2-eq (ECO2-eq) intensity was estimated to be 1,636gCO2-eq/€ with an uncertainty of 73gCO2-eq/€ . The stochastic analysis helps to account for variability in input variables into embodied CO2-eq analysis. The application of the stochastic embodied CO2-eq analysis as demonstrated in this study can be extended to other building sectors and countries and can form the basis for the development of evidence-based policy formulation since it provides greater information on embodied CO2-eq intensities of buildings than deterministic approaches.
Acquaye, A., Duffy, A & Basu, B. (2011) Stochastic hybrid embodied CO2-eq analysis: An application to the Irish apartment building sector. Energy and Buildings, vol.43, no.6, pp.1259-13-3. doi: 10.1016/j.enbuild.2011.01.006.
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