Embodied Energy and Nearly Zero Energy Buildings: A Review in Residential Buildings

Towards the EPBD recast 2010/31/EU and the nearly zero energy building (nZEB), this review addresses the whole life cycle energy analysis of residential buildings. Life Cycle Energy Analysis (LCEA) of 90 case studies of residential buildings is evaluated with a specific focus on the normalization procedure that follows the principles of Product Category Rule (PCR) 2014:02 for buildings. The normalization procedure provided a minimization of the sample by considering issues of comparability, the omissions in the boundaries of the system, the LCI method and the updating on the energy efficiency definition of the building. Results indicate that the use of different LCI methods leads to an important fluctuation in the absolute values of embodied energy as the embodied energy of annZEB calculated with process analysis is lower than every case study calculated with hybrid input-output analysis without including nZEBs. The share of embodied energy in low energy buildings could reach up to 57% -or even up to 83% when renewable energy sources are used for electricity production- and in nZEBs up to 100% even though a significant reduction in the total life cycle energy is identified. The increase in embodied energy and a difference of at least 17% in the share of embodied energy between low energy and nearly zero energy buildings indicate that maybe LCEA should be considered in energy efficiency regulations along with further standardization.

[1]  Robert H. Crawford,et al.  A comprehensive framework for assessing the life-cycle energy of building construction assemblies , 2010 .

[2]  Martin Belusko,et al.  Minimising the life cycle energy of buildings: Review and analysis , 2014 .

[3]  Paul Kenny,et al.  From net energy to zero energy buildings: Defining life cycle zero energy buildings (LC-ZEB) , 2010 .

[4]  Robert H. Crawford,et al.  Life Cycle Assessment in the Built Environment , 2011 .

[5]  Robert H. Crawford,et al.  A comprehensive model for streamlining low-energy building design , 2011 .

[6]  Ravi Prakash,et al.  Life cycle energy analysis of buildings: An overview , 2010 .

[7]  G. Treloar.  Extracting Embodied Energy Paths from Input–Output Tables: Towards an Input–Output-based Hybrid Energy Analysis Method , 1997 .

[8]  Thomas Lützkendorf,et al.  Net-zero buildings: incorporating embodied impacts , 2015 .

[9]  Giovanni Andrea Blengini,et al.  The changing role of life cycle phases, subsystems and materials in the LCA of low energy buildings , 2010 .

[10]  Graham J. Treloar,et al.  Comprehensive embodied energy analysis framework , 1998 .

[11]  Edgar G. Hertwich,et al.  Evaluation of process- and input-output-based life cycle inventory data with regard to truncation and aggregation issues. , 2011, Environmental science & technology.

[12]  Clark W. Bullard,et al.  Net energy analysis : handbook for combining process and input-output analysis , 1976 .

[13]  Anne Grete Hestnes,et al.  Energy use in the life cycle of conventional and low-energy buildings: A review article , 2007 .

[14]  Peter D. Blair,et al.  Input–Output Analysis: Foundations of Input–Output Analysis , 2009 .

[15]  Robert H. Crawford,et al.  The significance of embodied energy in certified passive houses , 2013 .

[16]  Manfred Lenzen,et al.  Errors in Conventional and Input‐Output—based Life—Cycle Inventories , 2000 .

[17]  Maurizio Cellura,et al.  Energy life-cycle approach in Net zero energy buildings balance: Operation and embodied energy of an Italian case study , 2014 .

[18]  Björn Berggren,et al.  LCE analysis of buildings - Taking the step towards Net Zero Energy Buildings , 2013 .

[19]  Robert H. Crawford,et al.  A multi-scale life-cycle energy and greenhouse-gas emissions analysis model for residential buildings , 2014 .

[20]  Hans-Jürgen Dr. Klüppel,et al.  The Revision of ISO Standards 14040-3 - ISO 14040: Environmental management – Life cycle assessment – Principles and framework - ISO 14044: Environmental management – Life cycle assessment – Requirements and guidelines , 2005 .

[21]  Cristina Gazulla,et al.  Integrating Simplified and Full Life Cycle Approaches in Decision Making for Building Energy Refurbishment: Benefits and Barriers , 2015 .

[22]  L. Gustavsson,et al.  Life cycle primary energy analysis of residential buildings , 2010 .

[23]  Theodoros Theodosiou,et al.  Embodied energy in residential buildings-towards the nearly zero energy building: A literature review , 2016 .

[24]  L.B. Lave,et al.  Comparing two life cycle assessment approaches: a process model vs. economic input-output-based assessment , 1997, Proceedings of the 1997 IEEE International Symposium on Electronics and the Environment. ISEE-1997.

[25]  Víctor Martínez-Moll,et al.  An assessment of the relationship between embodied and thermal energy demands in dwellings in a Mediterranean climate , 2015 .

[26]  Ignacio Zabalza,et al.  Use of LCA as a Tool for Building Ecodesign. A Case Study of a Low Energy Building in Spain , 2013 .

[27]  Thomas Lützkendorf,et al.  Energy Efficiency of Buildings: The Aspect of Embodied Energy , 2016 .

[28]  Xavier García Casals,et al.  Analysis of building energy regulation and certification in Europe: Their role, limitations and differences , 2006 .

[29]  Kari Alanne,et al.  Life cycle energy balance of residential buildings: A case study on hypothetical building models in Finland , 2015 .

[30]  Peter E.D. Love,et al.  Using national input/output data for embodied energy analysis of individual residential buildings , 2001 .

[31]  André Stephan,et al.  Reducing the total life cycle energy demand of recent residential buildings in Lebanon , 2014 .

[32]  R. Crawford.  Validation of a hybrid life-cycle inventory analysis method. , 2008, Journal of environmental management.

[33]  Robert H. Crawford,et al.  Using input-output data in life cycle inventory analysis , 2004 .