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Daraei, M., Avelin, A., Dotzauer, E. & Thorin, E. (2019). Evaluation of biofuel production integrated with existing CHP plants and the impacts on production planning of the system – A case study. Applied Energy, 252, Article ID 113461.
Open this publication in new window or tab >>Evaluation of biofuel production integrated with existing CHP plants and the impacts on production planning of the system – A case study
2019 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 252, article id 113461Article in journal (Refereed) Published
Abstract [en]

The increasing atmospheric CO2 concentration has caused a transformative shift in global energy systems, which is contributing to an increased use of renewables. Sweden is among the countries trying to shift to a fossil-fuel-free system in all energy sectors. This paper addresses the fuel demand and supply in the transportation sector in the county of Västmanland in Sweden. A Mixed Integer Linear Programming optimization model is developed to minimize cost in the studied system. The model is further used to investigate the influence of three different scenarios on production planning of regional Combined Heat and Power (CHP) plants: (1) straw-based biofuel production integrated with existing CHP plants to fuel combustion engine vehicles, (2) use of electric vehicles, and (3) use of hybrid vehicles fueled by both electricity and bioethanol. Potential solar power generation from rooftop solar cells is also included in the model. The energy system in scenario 2 is found to have the highest overall system efficiency; however, a large amount of power needs to be imported to the system. Hybrid vehicles can potentially reduce the electricity import and CO2 emissions compared to the current situation. Electricity production from rooftop solar collectors could provide the energy needs of the vehicles during summer, while regionally produced straw-based bioethanol integrated with CHP plants can satisfy the fuel needs of the vehicles in winter. This approach could affect the production planning of CHP plants, result in less fuel use and increase the share of renewable resources in the regional transportation system. 

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Electric vehicles, Energy systems, Mixed Integer Linear Programming, Optimization, Straw-based bioethanol, Transportation sector
National Category
Energy Engineering
Identifiers
urn:nbn:se:hig:diva-38270 (URN)10.1016/j.apenergy.2019.113461 (DOI)000497968000059 ()2-s2.0-85067284871 (Scopus ID)
Available from: 2019-06-27 Created: 2022-04-01Bibliographically approved
Daraei, M., Thorin, E., Avelin, A. & Dotzauer, E. (2019). Potential biofuel production in a fossil fuel free transportation system: A scenario for the County of Västmanland in Sweden. In: Energy Procedia: . Paper presented at 10th International Conference on Applied Energy (ICAE2018), 22-25 August 2018, Hong Kong, China (pp. 1330-1336). Elsevier
Open this publication in new window or tab >>Potential biofuel production in a fossil fuel free transportation system: A scenario for the County of Västmanland in Sweden
2019 (English)In: Energy Procedia, Elsevier , 2019, p. 1330-1336Conference paper, Published paper (Refereed)
Abstract [en]

Air pollution and increased CO2 concentration in atmosphere and other energy related issues caused a transformative shift in energy system which contributes to increased utilization of renewables as alternative to generate green energy carriers. The potential of renewable resources in different region and potential energy conversion have been largely considered by many researcher in many countries. The energy conversion technologies to produce heat, electricity, and transportation fuels have made impressive technical advances. Sweden has also been challenging with mitigation of CO2 emission and trying to shift into a fossil fuel free system in all energy sectors. This paper deals with the current status of fuel demand and supply in the transport sector in a County in Sweden. A scenario for a fossil fuel free transport sector at a regional level is developed to investigate the potential biofuel production from regionally produced straw. The results and analysis indicate that the potential for cereal based bioethanol production in the region is sufficient to meet the biofuel demand of the County. Using the fallow land for cereal cultivation, it is feasible to shift into a fossil fuel free transportation system where all passenger cars are fueled by bioethanol. The results and finding from the current paper will be used to develop further study on optimization of local biofuel production integrated with CHP plants considering application of other feedstock such as municipal wastes.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Bioethanol, Energy system, Straw, Transport sector
National Category
Other Engineering and Technologies
Identifiers
urn:nbn:se:hig:diva-38272 (URN)10.1016/j.egypro.2019.01.327 (DOI)000471031701107 ()2-s2.0-85063892971 (Scopus ID)
Conference
10th International Conference on Applied Energy (ICAE2018), 22-25 August 2018, Hong Kong, China
Available from: 2019-04-18 Created: 2022-04-03Bibliographically approved
Daraei, M., Thorin, E., Avelin, A. & Dotzauer, E. (2019). Potentials for increased application of renewables in the transportation system: A case study for Södermanland County, Sweden. In: Energy Procedia: . Paper presented at Applied Energy Symposium and Forum, Renewable Energy Integration with Mini/Microgrids, REM 2018, 29–30 September 2018, Rhodes, Greece (pp. 267-273). Elsevier
Open this publication in new window or tab >>Potentials for increased application of renewables in the transportation system: A case study for Södermanland County, Sweden
2019 (English)In: Energy Procedia, Elsevier , 2019, p. 267-273Conference paper, Published paper (Refereed)
Abstract [en]

In this study, possible alternations in a regional transport sector are assessed to increase the use of renewable resources. Three scenarios are developed aimed to investigate different alternatives including potential straw-based bioethanol supply to fuel regional cars with combustion engines, more use of Electrical Vehicles (EVs) with use of potential power from solar energy, and the feasibility of application of hybrid cars fueled with electricity and bioethanol. The evaluation considers the reduction in CO 2 emissions and increased balance in energy demand and supply. Results of the study indicate that application of hybrid vehicles with bioethanol-fueled engines and electrical motors could potentially reduce the CO 2 emissions compared with other proposed approaches in the studied scenarios. At the same time, there would be a balance in the system, so that, the bioethanol production from the available cereal straw in the region can meet the energy demand of suggested hybrid cars in wintertime. While, the energy supply from solar cells installed on the rooftop of the buildings can cover the electricity need of the motor during summer. This approach will also result in increased use of renewables in the transportation system.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
EVs, Hybrid, Renewable resources, Solar cells, Straw-based bioethanol
National Category
Energy Engineering
Identifiers
urn:nbn:se:hig:diva-38273 (URN)10.1016/j.egypro.2018.12.061 (DOI)000471291100043 ()2-s2.0-85063808717 (Scopus ID)
Conference
Applied Energy Symposium and Forum, Renewable Energy Integration with Mini/Microgrids, REM 2018, 29–30 September 2018, Rhodes, Greece
Available from: 2019-04-18 Created: 2022-04-02Bibliographically approved
Daraei, M., Thorin, E., Avelin, A. & Dotzauer, E. (2017). Evaluation of potential fossil fuel free energy system: Scenarios for optimization of a regional integrated system. Paper presented at 9th International Conference on Applied Energy, ICAE 2017; Cardiff; United Kingdom; 21-24 August 2017. Energy Procedia, 142, 964-970
Open this publication in new window or tab >>Evaluation of potential fossil fuel free energy system: Scenarios for optimization of a regional integrated system
2017 (English)In: Energy Procedia, ISSN 1876-6102, Vol. 142, p. 964-970Article in journal (Refereed) Published
Abstract [en]

Population growth and urbanization have led to increases in energy demand and consequently, greenhouse gas emissions. Therefore, the availability of the fossil fuel as the main source of energy supply has been changed. Utilization of renewable resources including solar, wind, and hydropower together with distributed energy systems could eliminate the dependency on fossil fuel energy sources. In this paper, energy use and supply trends have been studied for the Counties of Västmanland and Södermanland in Sweden in order to develop a scenario for the regional energy system in 2030. The aim is to use the scenario for evaluation of the impacts of regional renewable energy resources on the production planning of CHP plants. The scenario shows that there is not enough potential for electricity production from renewable resources such as solar, wind, and hydropower to fulfill the estimated demand in 2030. Around 75% of electricity needs in Västmanland and 89% of power demands in Södermanland need to be met by imported electricity to these regions. Efficiency improvements and a more complex energy system integrating also with other energy resources like biomass, waste and industrial waste heat are necessary to develop a sustainable energy system.

Place, publisher, year, edition, pages
Elsevier, 2017
Keywords
CHP, Renewable resources, regional energy system, Sweden, Integrated energy system.
National Category
Energy Systems
Identifiers
urn:nbn:se:hig:diva-38271 (URN)10.1016/j.egypro.2017.12.154 (DOI)000452901601020 ()2-s2.0-85041543943 (Scopus ID)
Conference
9th International Conference on Applied Energy, ICAE 2017; Cardiff; United Kingdom; 21-24 August 2017
Available from: 2017-11-21 Created: 2022-04-01 Last updated: 2023-08-28Bibliographically approved
Guziana, B., Song, H., Thorin, E., Dotzauer, E. & Yan, J. (2014). Policy Based Scenarios for Waste-to-Energy Use: Swedish Perspective. Waste and Biomass Valorization, 5(4), 679-688
Open this publication in new window or tab >>Policy Based Scenarios for Waste-to-Energy Use: Swedish Perspective
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2014 (English)In: Waste and Biomass Valorization, ISSN 1877-2641, E-ISSN 1877-265X, Vol. 5, no 4, p. 679-688Article in journal (Refereed) Published
Abstract [en]

The use of waste for energy purposes becomes increasingly interesting with respect to waste management and the energy systems. The decisions on alternative uses of waste for energy are mainly influenced by different policies, waste management, energy supply and use, as well as technologies. Two important issues, namely, a clear priority of waste prevention in waste management within EU and the growing concern for food losses and food waste at global and national level, shall be carefully considered and addressed. This paper proposes policy based scenarios for waste-to-energy systems with a focus on Sweden and with a broader EU approach. As baseline for the scenario development an inventory of waste-to-energy related policies and goals on international, national, regional and local level as well as inventory of existing scenarios and reports with future trends is made. The main substitute for fossil fuels and the possibilities for renewable energy export are basic elements that define scenarios. Biofuels and electricity are identified as main substitutes for the fossil fuels. A low waste availability level is recommended to be included in sensitivity analysis for scenarios. This paper assumes relative decoupling in Low Waste scenario in 2030, and absolute decoupling first in 2050.

Place, publisher, year, edition, pages
Springer, 2014
National Category
Energy Engineering
Identifiers
urn:nbn:se:hig:diva-38284 (URN)10.1007/s12649-013-9262-7 (DOI)000347721100013 ()2-s2.0-84926317733 (Scopus ID)
Available from: 2014-01-02 Created: 2022-04-03Bibliographically approved
Han, S., Dotzauer, E., Thorin, E. & Yan, J. (2014). Techno-economic analysis of an integrated biorefinery system for poly-generation of power, heat, pellets and bioethanol. International Journal of Energy Research, 38(5), 551-563
Open this publication in new window or tab >>Techno-economic analysis of an integrated biorefinery system for poly-generation of power, heat, pellets and bioethanol
2014 (English)In: International Journal of Energy Research, ISSN 0363-907X, E-ISSN 1099-114X, Vol. 38, no 5, p. 551-563Article in journal (Refereed) Published
Abstract [en]

Bioethanol is an alternative to fossil fuels in the transportation sector. The use of pellet for heating is also an efficient way to mitigate greenhouse gas emissions. This paper evaluates the techno-economic performance of a biorefinery system in which an existing combined heat and power (CHP) plant is integrated with the production of bioethanol and pellet using straw as feedstock. A two-stage acid hydrolysis process is used for bioethanol production, and two different drying technologies are applied to dry hydrolysis solid residues. A sensitivity analysis is performed on critical parameters such as the bioethanol selling price and feedstock price. The bioethanol production cost is also calculated for two cases with either 10 year or 15 year payback times. The results show that the second case is currently a more feasible economic configuration and reduces production costs by 36.4%-77.3% compared to other types of poly-generation plants that are not integrated into existing CHP plants. 

Place, publisher, year, edition, pages
Wiley, 2014
Keywords
combined heat and power, pellet, biorefinery, drying, integrated, bioethanol, straw
National Category
Energy Engineering
Identifiers
urn:nbn:se:hig:diva-38288 (URN)10.1002/er.3039 (DOI)000332988300002 ()2-s2.0-84895924485 (Scopus ID)
Available from: 2012-10-29 Created: 2022-04-03 Last updated: 2023-08-28Bibliographically approved
Han, S., Dotzauer, E., Eva, T., Bozena, G., Tuomas, H. & Jinyue, Y. (2012). A dynamic model to optimize a regional energy system with waste and crops as energy resources for greenhouse gases mitigation. Energy, 46(1), 522-532
Open this publication in new window or tab >>A dynamic model to optimize a regional energy system with waste and crops as energy resources for greenhouse gases mitigation
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2012 (English)In: Energy, ISSN 0360-5442, E-ISSN 1873-6785, Vol. 46, no 1, p. 522-532Article in journal (Refereed) Published
Abstract [en]

A dynamic model of a regional energy system has been developed to support sustainable waste treatmentwith greenhouse gases (GHG) mitigation, addressing the possibility for development towardsa regional fossil fuel-free society between 2011 and 2030. The model is based on conventional mixedinteger linear programming (MILP) techniques to minimize the total cost of regional energy systems. TheCO2 emission component in the developed model includes both fossil and biogenic origins whenconsidering waste, fossil fuels and other renewable sources for energy production. A case study for thecounty of Västmanland in central Sweden is performed to demonstrate the applicability of the developedMILP model in five distinct scenarios. The results show significant potential for mitigating CO2 emissionby gradually replacing fossil fuels with different renewable energy sources. The MILP model can be usefulfor providing strategies for treating wastes sustainably and mitigating GHG emissions in a regionalenergy system, which can function as decision bases for formulating GHG reduction policies andassessing the associated economic implications.

Place, publisher, year, edition, pages
Elsevier, 2012
Keywords
Waste, Regional energy system, Dynamic, Mixed integer linear programming, Fossil-fuel-free, Sustainable
National Category
Energy Engineering
Identifiers
urn:nbn:se:hig:diva-38286 (URN)10.1016/j.energy.2012.07.060 (DOI)000311873700053 ()2-s2.0-84867225896 (Scopus ID)
Available from: 2012-10-29 Created: 2022-03-31Bibliographically approved
Daianova, L., Dotzauer, E., Thorin, E. & Yan, J. (2012). Evaluation of a regional bioenergy system with local production of biofuel for transportation, integrated with a CHP plant. Applied Energy, 92, 739-749
Open this publication in new window or tab >>Evaluation of a regional bioenergy system with local production of biofuel for transportation, integrated with a CHP plant
2012 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 92, p. 739-749Article in journal (Refereed) Published
Abstract [en]

The share of renewable liquid fuels (ethanol, fatty acid methyl ester, biogas, and renewable electricity) in the total transportation fuel in Sweden, has increased by the end of 2009 to such level that e.g. domestic bioethanol production is unable to satisfy current ethanol fuel demand. Regional small-scale ethanol production can assist the region in covering the regional needs in transport fuel supply.

Current case study system includes the production of ethanol, biogas, heat and power from locally available cereals straw. A mixed integer programming (MIP) model is developed for cost optimization of regional transport fuel supply (ethanol, biogas and petrol). The model is applied for two cases, one when ethanol production plant is integrated with an existing CHP plant (polygeneration), and one with a standalone ethanol production plant.

The optimization results show that for both cases the changes in ethanol production costs have the biggest influence on the costs for supplying regional passenger car fleet with transport fuel. Petrol fuel price and straw production costs have also a significant effect on costs for supplying cars with transport fuel for both standalone ethanol production and integrated production system.

By integrating the ethanol production process with a CHP plant, the costs for supplying regional passenger car fleet with transport fuel can be cut by 31%, from 150 to 104 €/MW h fuel, which should be compared with E5 costs of 115 €/MW h (excl VAT).

Keywords
Bioethanol, Transport fuel, Straw, Combined heat and power (CHP), Polygeneration system, Mixed integer programming (MIP)
National Category
Energy Engineering
Identifiers
urn:nbn:se:hig:diva-38267 (URN)10.1016/j.apenergy.2011.08.016 (DOI)000300463800079 ()2-s2.0-84855291259 (Scopus ID)
Available from: 2011-10-27 Created: 2022-04-01Bibliographically approved
Starfelt, F., Daianova, L., Yan, J., Thorin, E. & Dotzauer, E. (2012). The impact of lignocellulosic ethanol yields in polygeneration with district heating: A case study. Applied Energy, 92, 791-799
Open this publication in new window or tab >>The impact of lignocellulosic ethanol yields in polygeneration with district heating: A case study
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2012 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 92, p. 791-799Article in journal (Refereed) Published
Abstract [en]

The development towards high energy efficiency and low environmental impact from human interactions has led to changes at many levels of society. As a result of the introduction of penalties on carbon dioxide emissions and other economic instruments, the energy industry is striving to improve energy efficiency and climate mitigation by switching from fossil fuels to renewable fuels. Biomass-based combined heat and power (CHP) plants connected to district heating networks have a need to find uses for the excess heat they produce in summer when the heat demand is low. On the other hand, the transport sector makes a substantial contribution to the increasing CO 2 emissions, which have to be reduced. One promising alternative to address these challenging issues is the integration of vehicle fuel production with biomass-based CHP plants. This paper presents the configuration and operating profits in terms of electricity, heat and ethanol fuel from cellulosic biomass. A case study of a commercial small scale CHP plant was conducted using simulation and modeling tools. The results clearly show that electricity production can be increased when CHP production is integrated with cellulosic ethanol production. The findings also show that the economic benefits of the energy system can be realized with near-term commercially available technology, and that the benefits do not rely solely on ethanol yields.

Place, publisher, year, edition, pages
Elsevier, 2012
Keywords
Biofuel, Biomass, Cellulosic ethanol, Polygeneration, Efficiency improvement
National Category
Energy Engineering
Identifiers
urn:nbn:se:hig:diva-38327 (URN)10.1016/j.apenergy.2011.08.031 (DOI)000300463800085 ()2-s2.0-84855257802 (Scopus ID)
Available from: 2011-11-17 Created: 2022-04-01Bibliographically approved
Guziana, B., Song, H., Thorin, E., Dotzauer, E. & Yan, J. (2012). Waste-to-energy in a Polish perspective. In: : . Paper presented at the 4th International Conference on Applied Energy ICAE2012, Suzhou China July 5-8, 2012.
Open this publication in new window or tab >>Waste-to-energy in a Polish perspective
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2012 (English)Conference paper, Published paper (Other academic)
Abstract [en]

 Energy recovery from waste becomes increasingly interesting both with respect to waste management and for the sustainable energy supply. The REMOWE (Regional Mobilizing of Sustainable Waste-to-Energy Production) project, seeks to facilitate the implementation of sustainable systems for waste-to-energy in the project regions. Based on investigations done within the REMOWE project this paper discusses increased waste-to-energy utilization in Poland with focus on a comparison with the current state in Sweden. There are big differences between Sweden and Poland, and between Lower Silesia Voivodship in Poland and Västmanland County in Sweden. The REMOWE project through its outputs and discussions during meetings support transfer of technology, knowledge and best practice. Procedural justice and early involvement of public can increase social acceptance and successful implementation of projects regarding incineration, biogas production and separate collection of biodegradable waste.

Keywords
waste-to-energy, REMOWE, social acceptance
National Category
Energy Engineering
Identifiers
urn:nbn:se:hig:diva-38285 (URN)
Conference
the 4th International Conference on Applied Energy ICAE2012, Suzhou China July 5-8, 2012
Funder
EU, FP7, Seventh Framework Programme
Available from: 2022-04-03 Created: 2022-04-03 Last updated: 2022-04-03Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-3485-5440

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