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Decentralised energy systems based on biomass

a life cycle perspective on climate impact and energy balance

Kimming, Marie (2015). Decentralised energy systems based on biomass. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2015:15
ISBN 978-91-576-8208-6
eISBN 978-91-576-8209-3
[Doctoral thesis]

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Abstract

Replacing fossil fuels with renewable energy sources is recognised as an important measure to mitigate climate change. Residual biomass from agriculture and forestry and short-rotation coppice grown on unused land can be converted to heat, power and fuel without directly compromising production of edible crops. As biomass is mainly produced in rural areas, increased use of biomass-based energy could contribute to job creation and rural economic development.

This thesis investigated whether farmers can generate energy from their own on-farm agricultural and forestry residues for energy self-sufficiency on the farm or for commercial production of district heating or combined heat and power production, with reduced greenhouse gas emissions compared with fossil alternatives. Consequential life cycle assessment methodology was used, with the focus on greenhouse gas emissions and energy balance.

The results showed that arable and dairy organic farms in Sweden can both become self-sufficient in energy by using on-farm biomass residues. Furthermore, decentralised bioenergy systems proved superior to central production based on fossil fuels or large-scale biomass in terms of both greenhouse gas emissions and production costs. The results also revealed large variations (9-97%) in greenhouse gas emissions reduction potential compared with fossil fuels. This variation is partly due to the impact on soil carbon content in soil management systems, where crop residue removal has a negative effect and willow coppice production a positive effect. The input energy requirement for biomass systems is generally higher than for fossil systems, but is typically generated from renewable energy.

Authors/Creators:Kimming, Marie
Title:Decentralised energy systems based on biomass
Subtitle:a life cycle perspective on climate impact and energy balance
Series/Journal:Acta Universitatis agriculturae Sueciae (1652-6880)
Year of publishing :2015
Depositing date:9 January 2015
Volume:2015:15
Number of Pages:81
Papers/manuscripts:
NumberReferences
I.Kimming, M., Sundberg, C., Nordberg, Å., Baky, A., Bernesson, S., Norén, O. & Hansson, P-A. (2011). LCA of energy self-sufficiency systems based on agricultural residues for organic arable farms. Bioresource Technology 102, 1424-1432.
II.Kimming, M., Sundberg, C., Nordberg, Å., Baky, A., Bernesson, S. & Hansson, P-A. (2014). Replacing fossil energy for organic milk production – Potential biomass sources and GHG emission reductions. Journal of Cleaner Production doi.org/10.1016/j.jclepro.2014.03.044
III.Kimming, M., Sundberg, C., Nordberg, Å., Baky, A., Bernesson, S., Norén, O. & Hansson, P-A. (2011). Biomass from agriculture in small-scale combined heat and power plants – A comparative Life Cycle Assessment. Biomass and Bioenergy 35, 1572-1581.
IV.Kimming, M., Sundberg, C., Nordberg, Å., & Hansson, P-A. Vertical integration of local fuel producers into rural DH systems – Climate impact and production costs. Accepted for publication in Energy Policy
Place of Publication:Uppsala
Publisher:Department of Energy and Technology, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-576-8208-6
ISBN for electronic version:978-91-576-8209-3
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:K Forestry > K10 Forestry production
P Natural resources > P06 Renewable energy resources
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 405 Other Agricultural Sciences > Renewable Bioenergy Research
Agrovoc terms:biomass, bioenergy, biofuels, energy generation, life cycle analysis, environmental impact assessment, climatic change
Keywords:bioenergy, biomass, LCA
URN:NBN:urn:nbn:se:slu:epsilon-e-2294
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-2294
ID Code:11738
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Energy and Technology
External funders:FORMAS
Deposited By: Marie Kimming
Deposited On:09 Jan 2015 14:49
Metadata Last Modified:27 Jan 2015 22:27

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