LAPSE:2019.1517
Published Article
LAPSE:2019.1517
The Effect of Embodied Impact on the Cost-Optimal Levels of Nearly Zero Energy Buildings: A Case Study of a Residential Building in Thessaloniki, Greece
Panagiotis Chastas, Theodoros Theodosiou, Karolos J. Kontoleon, Dimitrios Bikas
December 10, 2019
Considering the nearly zero energy building (nZEB) and the increased measures for the improvement of the energy efficiency, the international literature indicates an extended use of specialized materials and technical installations. An increase in the embodied energy follows that use, with a final share between 74% and 100% in the total life cycle energy of residential nZEBs. The current energy efficiency legislation considers only the impact from the operational phase and ignores the embodied impact from the remaining life cycle phases of the building. Nevertheless, the delegated regulation 244 of 2012 acknowledges the incompleteness of this assessment and provides an optional consideration of the embodied (“grey”) energy. The current study applies this option through the macroeconomic global cost calculations and the cost-optimal levels of nZEBs. The results indicate a limited effect of the embodied impact on the cost-optimal levels and in specific on extended calculation periods and in combination with other key parameters of the sensitivity analysis. An increase in the primary energy and a transposition to variants with lower use of materials and decreased embodied emissions follow this effect. Sensitivity analysis confirms the calculation period as a key parameter and indicates the need for further research.
Keywords
CO2 emissions, cost-optimal levels, embodied impact, EPBD recast, nZEB
Suggested Citation
Chastas P, Theodosiou T, Kontoleon KJ, Bikas D. The Effect of Embodied Impact on the Cost-Optimal Levels of Nearly Zero Energy Buildings: A Case Study of a Residential Building in Thessaloniki, Greece. (2019). LAPSE:2019.1517
Author Affiliations
Chastas P: Aristotle University of Thessaloniki, Department of Civil Engineering, Laboratory of Building Construction and Building Physics, Thessaloniki 54124, Greece [ORCID]
Theodosiou T: Aristotle University of Thessaloniki, Department of Civil Engineering, Laboratory of Building Construction and Building Physics, Thessaloniki 54124, Greece [ORCID]
Kontoleon KJ: Aristotle University of Thessaloniki, Department of Civil Engineering, Laboratory of Building Construction and Building Physics, Thessaloniki 54124, Greece
Bikas D: Aristotle University of Thessaloniki, Department of Civil Engineering, Laboratory of Building Construction and Building Physics, Thessaloniki 54124, Greece
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Journal Name
Energies
Volume
10
Issue
6
Article Number
E740
Year
2017
Publication Date
2017-05-24
Published Version
ISSN
1996-1073
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PII: en10060740, Publication Type: Journal Article
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LAPSE:2019.1517
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doi:10.3390/en10060740
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Dec 10, 2019
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Dec 10, 2019
 
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Calvin Tsay
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