Tag Archives: natural gas

999-1006 M. Repele, A.Paturska, K. Valters and G. Bazbauers
Life cycle assessment of bio-methane supply system based on natural gas infrastructure
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Life cycle assessment of bio-methane supply system based on natural gas infrastructure

M. Repele*, A.Paturska, K. Valters and G. Bazbauers

Institute of Energy Systems and Environment, Riga Technical University, Kronvalda Boulevard 1, Riga, LV1010, Latvia; *Correspondence: mara.repele@rtu.lv

Abstract:

Many sites for biogas production in Latvia currently do not have sufficient heat load to provide power production in co-generation mode. The alternative to relatively inefficient power production could be production of bio-methane which is known as one of the most important renewable option for gas supplies. After removal of contaminants bio-methane is of quality of natural gas and can be delivered to power plants and industry using the natural gas supply infrastructure. For analysis of environmental benefit of using bio-methane the environmental impact of the proposed solution has to be assessed. The aim of the study is to make life cycle assessment of the system for bio-methane supply to industrial plant via the natural gas grid. The analysed system includes bio-methane production and transport to the natural gas pipeline including the infrastructure. Functional unit was 1 MWh of bio-methane energy injected into the natural gas transmission pipeline. Life-cycle model was created and analysed with software ‘SimaPro’. ReCiPe and Eco-Indicator’99 were used as characterization methods to analyse the life-cycle environmental impacts. Results show the influence and contribution level expressed in mid-point categories as well as in a single-score indicator. The largest impact is created by use of fossil energy sources in production of bio-methane. The results can be used to design renewable energy supply systems and for the comparison of alternatives.

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367-372 M. Repele, M. Dudko, J. Rusanova, K. Valters and G. Bazbauers
Environmental aspects of substituting bio-synthetic natural gas for natural gas in the brick industry
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Environmental aspects of substituting bio-synthetic natural gas for natural gas in the brick industry

M. Repele*, M. Dudko, J. Rusanova, K. Valters and G. Bazbauers

Institute of Energy Systems and Environment, Riga Technical University,Kronvalda Boulevard ¹, Riga, LV¹0¹0, Latvia;*Correspondence: mara.repele@rtu.lv

Abstract:

Firing of bricks is an essential manufacturing process during which the bricks obtainall  the  necessary  properties.  Life  cycle  assessment  studies  show  that  this  process  is  also  themost  energy  intensive  in  the  brick  manufacturing  process  and  results  in  the  largestenvironmental impact. Usually kilns are fired with natural gas, therefore substitution of fossilfuel  with  a  renewable  energy  source  is  considered  one  of  the  most  effective  approaches  forreduction  of  environmental  impact.  Bio-synthetic  natural  gas  (bio-SNG)  is  one  of  the  mostfeasible  substitutes  for  natural  gas  and  therefore  the  aim  of  the  study  was  to  compare  theenvironmental impacts of those energy sources.Comparison  of  the  life  cycle  of  the  environmental  impact  of  natural  gas  and  bio-SNG  wascarried out using the GEMIS (Global Emission Model for Integrated Systems) database. Bothenergy  sources  were  compared  on  the  basis  of  the  life  cycle  of  CO²  emissions,  cumulatedenergy and material requirement, land use and employment effects.Results show that by replacing natural gas with bio-SNG, greenhouse gases could be reducedand employment increased. However, cumulated energy, material and land requirement is largerwhen bio-SNG is used instead of natural gas.

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