Embodied energy in buildings : wood versus concrete - reply to Börjesson and Gustavsson

We analyse the wood and concrete designs of the Walludden building described by Borjesson et al. (Energy Policy 28 (2000) 575) in terms of their embodied energy, employing an environmentally extended input–output framework in a tiered hybrid life-cycle assessment, and in a structural path analysis. We illustrate the complexity of the inter-industry supply chains underlying the upstream energy requirements for the building options, and demonstrate that higher-order inputs are difficult to capture in a conventional process analysis. Our calculations show that Borjesson and Gustavsson's estimates of energy requirements and greenhouse gas emissions are underestimated by a factor of about 2, and that corresponding greenhouse gas balances are positive at about 30 t C-eq. Nevertheless, Borjesson and Gustavsson's general result—the concrete-framed building causing higher emissions—still holds.

[1]  Arpad Horvath,et al.  Economic Input–Output Models for Environmental Life-Cycle Assessment , 1998 .

[2]  Hiroki Hondo,et al.  Derivation of energy-embodiment functions to estimate the embodied energy from the material content , 1996 .

[3]  Berit Hasler,et al.  Accounting for nitrogen in Denmark—a structural decomposition analysis , 1999 .

[4]  Lester B. Lave,et al.  Environmental Input-Output Life Cycle Analysis: A Summary of Results Including a Comparison with the SETAC Approach , 1998 .

[5]  Ernst Worrell,et al.  Energy intensity in the iron and steel industry: a comparison of physical and economic indicators , 1997 .

[6]  C. Hendrickson,et al.  Using input-output analysis to estimate economy-wide discharges , 1995 .

[7]  A. M. Wolsky,et al.  Approximate aggregation and error in input-output models , 1982 .

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

[9]  Manfred Lenzen,et al.  A Generalized Input-Output Multiplier Calculus for Australia , 2001 .

[10]  W. Leontief.  Environmental Repercussions and the Economic Structure: An Input-Output Approach , 1970 .

[11]  Hiroki Hondo,et al.  Estimating the embodied carbon emissions from the material content , 1997 .

[12]  Michael S. Macrakis.  Energy : demand, conservation, and institutional problems , 1974 .

[13]  Robert Dixon,et al.  Inter‐Industry Transactions and Input‐Output Analysis , 1996 .

[14]  Clive Hamilton,et al.  The sustainability of logging in Indonesia's tropical forests: A dynamic input-output analysis , 1997 .

[15]  Paolo F. Ricci,et al.  Health and Environmental Risk Assessment , 1985 .

[16]  M. Lenzen,et al.  A modified ecological footprint method and its application to Australia , 2001 .

[17]  Manfred Lenzen,et al.  Truncation error in embodied energy analyses of basic iron and steel products , 2000 .

[18]  S. Joshi.  Product Environmental Life‐Cycle Assessment Using Input‐Output Techniques , 1999 .

[19]  F. Duchin.  Industrial input-output analysis: implications for industrial ecology. , 1992, Proceedings of the National Academy of Sciences of the United States of America.

[20]  Ross Cullen,et al.  New methodology for the ecological footprint with an application to the New Zealand economy , 1998 .

[21]  Peter Born,et al.  Input-output analysis: Input of energy, CO2, and work to produce goods , 1996 .

[22]  Manfred Lenzen,et al.  GREENHOUSE GAS ANALYSIS OF SOLAR-THERMAL ELECTRICITY GENERATION , 1999 .

[23]  Steinar Strøm,et al.  The generation of residual flows in Norway: an input-output approach , 1976 .

[24]  Robert J. Korbach,et al.  A regional interindustry environmental model , 1973 .

[25]  P. Wenzel,et al.  Länderspezifische Strombereitstellungs- und CO2-Emissionsfaktoren , 1999 .

[26]  Michael Yokell,et al.  USE OF INPUT-OUTPUT ANALYSIS TO ESTIMATE OCCUPATIONAL SAFETY AND HEALTH IMPACTS OF ELECTRIC GENERATION TECHNOLOGIES , 1985 .

[27]  J. Proops,et al.  Input-output analysis and energy intensities: a comparison of some methodologies , 1977 .

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

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

[30]  Peter E.D. Love,et al.  A hybrid life cycle assessment method for construction , 2000 .

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

[32]  M. D. Rowe,et al.  A COMPARISON OF INPUT-OUTPUT AND PROCESS ANALYSES , 1985 .

[33]  Glenn-Marie Lange.  Applying an Integrated Natural Resource Accounts and Input–Output Model to Development Planning in Indonesia , 1998 .

[34]  P. Börjesson,et al.  Greenhouse gas balances in building construction : wood versus concrete from life-cycle and forest land-use perspectives , 2000 .

[35]  Manfred Lenzen,et al.  A guide for compiling inventories in hybrid life-cycle assessments: some Australian results , 2002 .

[36]  P. Norton,et al.  A comparison of CO2 emissions from fossil and solar power plants in the United States , 1990 .

[37]  Walter Isard,et al.  ON THE LINKAGE OF SOCIO‐ECONOMIC AND ECOLOGIC SYSTEMS , 1968 .