| 1. |
- Ahlgren, Erik, 1962, et al.
(författare)
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Biokombi Rya - slutrapporter från ingående delprojekt
- 2007
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Inom projektet Biokombi Rya har ett flertal olika forskargrupper samarbetat för att studera system¬effekterna av förgasning av biobränsle ur olika aspekter. Syftet med projektet är att öka kunskapen om biobränsleförgasning i Sverige samt att utreda förutsättningar för att sådana anläggningar ska vara ekonomiskt och miljömässigt intressanta. En referensgrupp har varit kopplad till projektet där förutsättningar, resultat och slutsatser har behandlats.I denna underlagsrapport har slutrapporterna från projektets delprojekt samlats. De beskriver förutsättningar, metodansatser, använda data och resultat utförligt och utgör på så sätt ett viktigt komplement till den mer övergripande beskrivningen i projektets syntesrapport. De delrapporter som ingår har valts för att täcka in samtliga delar av projektet som är av allmänt intresse. Projektresultat som publicerats på annat sätt berörs dock mer kortfattat.Projektet Biokombi Rya har pågått under två år (2005-2006) och drivits av Chalmers EnergiCentrum. Förutom de omfattande analysinsatser som författarna till denna rapport står för, har Avdelningen för kemisk teknologi vid KTH, Siemens Industrial Turbines AB och Göteborg Energi AB bidragit med expertstöd. CIT Industriell Energianalys, med undertecknad som projektledare, har stått för projektledning och koordination.Projektet har finansierats av Energimyndigheten, Göteborg Energis forsknings¬stiftelse samt Göteborg Energi AB.
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| 2. |
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| 3. |
- Andersson, Eva Ingeborg Elisabeth, 1956, et al.
(författare)
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Comparison of pulp-mill-integrated hydrogen production from gasified black liquor with stand-alone production from gasified biomass
- 2007
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Ingår i: Energy. - : Elsevier BV. - 0360-5442. ; 32:4, s. 399-405
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Tidskriftsartikel (refereegranskat)abstract
- When gasified black liquor is used for hydrogen production, significant amounts of biomass must be imported. This paper compares two alternative options for producing hydrogen from biomass: (A) pulp-mill-integrated hydrogen production from gasified back liquor; and (B) stand-alone production of hydrogen from gasified biomass. The comparison assumes that the same amount of biomass that is imported in Alternative A is supplied to a stand-alone hydrogen production plant and that the gasified black liquor in Alternative B is used in a black liquor gasification combined cycle (BLGCC) CHP unit. The comparison is based upon equal amounts of black liquor fed to the gasifier, and identical steam and power requirements for the pulp mill. The two systems are compared on the basis of total CO2 emission consequences, based upon different assumptions for the reference energy system that reflect different societal CO2 emissions reduction target levels. Ambitions targets are expected to lead to a more CO2–lean reference energy system, in which case hydrogen production from gasified black liquor (Alternative A) is best from a CO2 emissions’ perspective, whereas with high CO2 emissions associated with electricity production, hydrogen from gasified biomass and electricity from gasified black liquor (Alternative B) is preferable.
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| 4. |
- Andersson, Eva Ingeborg Elisabeth, 1956, et al.
(författare)
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Comparison of pulp-mill integrated hydrogen production from gasified black liquor with stand-alone production from gasified biomass
- 2005
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Ingår i: Proceedings of ECOS 2005. - 8251920418 ; 3, s. 1131-1138
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Konferensbidrag (refereegranskat)abstract
- When gasified black liquor is used for hydrogen production at a pulp mill site, significant amounts of biomass must be imported. This paper compares two alternative options for producing hydrogen from biomass: (A) pulp mill integrated hydrogen production from gasified back liquor; and (B) stand-alone production of hydrogen from gasified biomass. The comparison assumes that the same amount of biomass that is imported in alternative A is supplied to a stand-alone hydrogen production plant and that the gasified black liquor in alternative B is used in a BLGCC (Black Liquor Gasification Combined Cycle) CHP unit. The comparison is based upon equal amounts of black liquor fed to the gasifier, and identical steam and power requirements for the pulp mill. The potential for delivering low temperature excess heat to a district heating system is considered. The two systems are compared on the basis of total CO2 emission consequences, based upon different assumptions for the reference energy system that reflect different societal CO2 emissions reduction target levels. If the reference energy system includes electricity production in coal-fired power plants without CO2 sequestration and car engines that are 30% more efficient than todays , the best alternative is to use the biomass in a stand-alone hydrogen production unit. However, if electricity production has lower CO2 emissions , hydrogen produced with gasified black liquor integrated in the pulp mill can achieve the largest CO2 emissions reduction.
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| 5. |
- Andersson, Eva Ingeborg Elisabeth, 1956, et al.
(författare)
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Energy efficient upgrading of biofuel integrated with a pulp mill
- 2006
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Ingår i: Energy. - : Elsevier BV. - 0360-5442. ; 31:10-11, s. 1384-1394
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Tidskriftsartikel (refereegranskat)abstract
- This paper presents and evaluates different energy efficient options for integrating drying and pelletising ofbiofuel with a modern energy efficient pulp mill process. When drying biofuel, a large amount of the heat input canoften be recovered. One option for heat recovery is to cover low-temperature heat demand in the pulping process.Alternatively available excess heat from the pulp mill can be used for drying. Both alternatives will contribute to abetter energy efficiency for the combined pulp mill and biofuel upgrading facility. Pinch analysis tools can be usedto estimate the excess heat potential at different temperature levels in the pulp mill. Three different technologies forpulp mill integrated biofuel drying were chosen for the study, namely steam drying, flue gas drying and vacuumdrying. The different technologies are evaluated on the basis of energy usage, global CO2 emissions and resultingpellets production cost, using stand-alone pellets production as a reference. The pulp mill assumed for thecalculations is the Eco-Cyclic reference pulp mill. The results of the study indicate that the most attractiveintegrated drying technology option is the flue gas dryer, using flue gases from the black liquor boiler. With theavailable flue gas stream at the reference pulp mill, a potential pellets production of 70,000 ton/yr could beachieved at a cost of 24.6 EUR/ton. The associated reduction in CO2 emissions compared to stand-alone pelletsproduction is 3136 kg/MWh-pellets.
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| 6. |
- Andersson, Eva Ingeborg Elisabeth, 1956, et al.
(författare)
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System analysis of hydrogen production from gasified black liquor
- 2006
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Ingår i: Energy. ; 31:15, s. 3426-3434
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Tidskriftsartikel (refereegranskat)abstract
- Hydrogen produced from renewable biofuel is both clean and CO2 neutral. This paper evaluates energy and net CO2 emissions consequences of integration of hydrogen production from gasified black liquor in a chemical pulp mill. A model of hydrogen production from gasified black liquor was developed and integration possibilities with the pulp mill's energy system were evaluated in order to maximize energy recovery. The potential hydrogen production is 59 000 tonnes per year if integrated with the KAM reference market pulp mill producing 630 000 Air dried tonnes (ADt) pulp/year. Changes of net CO2 emissions associated with modified mill electric power balance, biofuel import and end usage of the produced hydrogen are presented and compared with other uses of gasified black liquor such as electricity production and methanol production. Hydrogen production will result in the greatest reduction of net CO2 emissions and could reduce the Swedish CO2 emissions by 8% if implemented in all chemical market pulp mills. The associated increases of biofuel and electric power consumption are 5% and 1.7%, respectively.
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| 7. |
- Andersson, Greger, et al.
(författare)
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Opera in Sweden
- 2009
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Ingår i: The Cambridge History of Eighteeenth-Century Music. - 9780521663199 ; , s. 420-431
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 8. |
- Andersson, Mats, et al.
(författare)
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Three Fast Ways of Measuring Receiver Sensitivity in a Reverberation Chamber
- 2008
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Ingår i: 2008 IEEE International Workshop on Antenna Technology: Small Antennas and Novel Metamaterials, IWAT 2008; Chiba; Japan; 4 March 2008 through 6 March 2008. ; , s. 51-54
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Konferensbidrag (refereegranskat)abstract
- The traditional way of evaluating receiver sensitivity is to measure the Total Isotropic Sensitivity (TIS) in an anechoic environment. Very few wireless terminals with small antennas are used in an anechoic environment. This paper will describe three alternative methods to measure the receiver sensitivity in a reverberation chamber, each of which can be done in less than 10 minutes which is much faster than measurements in anechoic chamber. The fastest method is the average fading sensitivity AFS that in contrast to TIS also be used to measure receiver sensitivity of multi antenna terminals for antenna systems with diversity and MIMO capability. The paper includes the first published TIS and AFS results for WCDMA terminals obtained in a reverberation chamber. The agreement to TIS measurements in anechoic chambers is shown to be good.
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| 9. |
- Andersson, Simon, et al.
(författare)
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Gatupolitikens lagar – Juridisk handbok för politiska aktivister
- 2005
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Bok (övrigt vetenskapligt/konstnärligt)abstract
- Demonstrera, blockera, slå sönder krigsmateriel och gömma flyktingar – det finns många sätt att bedriva politik utanför partierna. En del har du rätt att göra och annat är olagligt. Var går gränserna? Vad händer om du bryter mot lagen? Med Gatupolitikens lagar vill vi sprida den juridiska kunskapen. Boken kan användas som en praktisk handbok men ger också en beskrivning av den svenska rätten ur ett maktkritiskt perspektiv.
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| 10. |
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