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Publications (10 of 17) Show all publications
Campana, P. E., Landelius, T., Andersson, S., Lundström, L., Nordlander, E., He, T., . . . Yan, J. (2020). A gridded optimization model for photovoltaic applications. Solar Energy, 202, 465-484
Open this publication in new window or tab >>A gridded optimization model for photovoltaic applications
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2020 (English)In: Solar Energy, ISSN 0038-092X, E-ISSN 1471-1257, Vol. 202, p. 465-484Article in journal (Refereed) Published
Abstract [en]

This study aims to develop a gridded optimization model for studying photovoltaic applications in Nordic countries. The model uses the spatial and temporal data generated by the mesoscale models STRÅNG and MESAN developed by the Swedish Meteorological and Hydrological Institute. The model is developed based on the comparison between five irradiance databases, three decomposition models, two transposition models, and two photovoltaic models. Several techno-economic and environmental aspects of photovoltaic systems and photovoltaic systems integrated with batteries are investigated from a spatial perspective. CM SAF SARAH-2, Engerer2, and Perez1990 have shown the best performances among the irradiance databases, and decomposition and transposition models, respectively. STRÅNG resulted in the second-best irradiance database to be used in Sweden for photovoltaic applications when comparing hourly global horizontal irradiance with weather station data. The developed model can be employed for carrying out further detailed gridded techno-economic assessments of photovoltaic applications and energy systems in general in Nordic countries. The model structure is generic and can be applied to every gridded climatological database worldwide.

Place, publisher, year, edition, pages
Elsevier Ltd, 2020
National Category
Energy Systems
Identifiers
urn:nbn:se:mdh:diva-47529 (URN)10.1016/j.solener.2020.03.076 (DOI)2-s2.0-85082930947 (Scopus ID)
Available from: 2020-04-16 Created: 2020-04-16 Last updated: 2020-04-16Bibliographically approved
Dahlquist, E., Nordlader, E., Thorin, E., Wallin, C. & Avelin, A. (2019). Control of waste water treatment combined with irrigation. In: : . Paper presented at the 60th International Conference of Scandinavian Simulation Society, SIMS 2019, in Västerås, Sweden August 13-16, 2019.
Open this publication in new window or tab >>Control of waste water treatment combined with irrigation
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2019 (English)Conference paper, Oral presentation only (Refereed)
Abstract [en]

In waste water treatment using biological treatment processes normally phosphorous, nitrous compounds as well as organic matterare removed.It is also important to remove or kill pathogens that otherwisecould cause diseases. The surplus of bio-sludge is used to produce biogas. In thepaper four different alternatives for system design and operations of systems was discussed. The alternatives integrates thewaste water treatment and irrigation offarmland using the water taken out from different positions in the waste water treatment plant.

Keywords
design, operation, nitrogen, phosphorous, material balance
National Category
Engineering and Technology Energy Engineering
Research subject
Energy- and Environmental Engineering
Identifiers
urn:nbn:se:mdh:diva-46377 (URN)
Conference
the 60th International Conference of Scandinavian Simulation Society, SIMS 2019, in Västerås, Sweden August 13-16, 2019
Funder
Swedish Research Council Formas, 2018-02213
Available from: 2019-12-15 Created: 2019-12-15 Last updated: 2019-12-18Bibliographically approved
Campana, P. E., Cheng, F., Ericson, E., Andersson, S., Landelius, T. & Yan, J. (2018). Modelling the diffuse component of solar radiation using artificial intelligence techniques. In: : . Paper presented at AGU2018.
Open this publication in new window or tab >>Modelling the diffuse component of solar radiation using artificial intelligence techniques
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2018 (English)Conference paper, Poster (with or without abstract) (Refereed)
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-41684 (URN)
Conference
AGU2018
Available from: 2018-12-18 Created: 2018-12-18 Last updated: 2019-10-14Bibliographically approved
Nordlander, E., Eva, T. & Yan, J. (2017). Investigating the possibility of applying an ADM1 based model to a full-scale co-digestion plant. Biochemical engineering journal, 120, 73-83
Open this publication in new window or tab >>Investigating the possibility of applying an ADM1 based model to a full-scale co-digestion plant
2017 (English)In: Biochemical engineering journal, ISSN 1369-703X, E-ISSN 1873-295X, Vol. 120, p. 73-83Article in journal (Refereed) Published
Abstract [en]

This study investigated the possibility of using a model based on the anaerobic digestion model no. 1 (ADM1) on a full-scale 4000 m3 digester in order to understand how such theoretical models can be applied to a real industrial process. The industrial scale digester co-digests the organic fraction of municipal solid waste, grease trap sludge, and ley crop silage with varying feed rates and amounts of volatile solids. A year of process data was collected. Biogas flow, methane content/flow, and ammonia nitrogen were the variables that the model was best at predicting (index of agreement at 0.78, 0.61/0.77, and 0.68, respectively). The model was also used to investigate the effect of increasing the volatile solids (VS) concentration entering the digester. According to simulation results, increasing the influent VS concentration will increase biogas and methane outflow (from 1.5 million Nm3 methane to more than 2 million Nm3 methane), but decrease the amounts of biogas/methane per unit of volatile solids (from about 264 Nm3methane per tonne VS to below 215 Nm3 methane per tonne VS).

Place, publisher, year, edition, pages
Elsevier, 2017
National Category
Bioenergy
Identifiers
urn:nbn:se:mdh:diva-34634 (URN)10.1016/j.bej.2016.12.014 (DOI)000395603900009 ()2-s2.0-85009230307 (Scopus ID)
Available from: 2017-01-16 Created: 2017-01-16 Last updated: 2018-12-12Bibliographically approved
Thorin, E., Nordlander, E., Lindmark, J., Schwede, S., Jansson, J., Hakalehto, E., . . . Den Boer, E. (2014). Possibilites for Optimization of Biorefinery process.
Open this publication in new window or tab >>Possibilites for Optimization of Biorefinery process
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2014 (English)Report (Other academic)
Series
ABOWE project reports ; O3.8
National Category
Bioenergy
Identifiers
urn:nbn:se:mdh:diva-26894 (URN)
Available from: 2014-12-10 Created: 2014-12-10 Last updated: 2017-11-07Bibliographically approved
Wang, X., Nordlander, E., Thorin, E. & Yan, J. (2013). Microalgal biomethane production integrated with an existing biogas plant: A case study in Sweden. Applied Energy, 112, 478-484
Open this publication in new window or tab >>Microalgal biomethane production integrated with an existing biogas plant: A case study in Sweden
2013 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 112, p. 478-484Article in journal (Refereed) Published
Abstract [en]

Microalgae are considered as potential sources for biodiesel production due to the higher growth rate than terrestrial plants. However, the large-scale application of algal biodiesel would be limited by the downstream cost of lipid extraction and the availability of water, CO2 and nutrients. A possible solution is to integrate algae cultivation with existing biogas plant, where algae can be cultivated using the discharges of CO2 and digestate as nutrient input, and then the attained biomass can be converted directly to biomethane by existing infrastructures. This integrated system is investigated and evaluated in this study. Algae are cultivated in a photobioreactor in a greenhouse, and two cultivation options (greenhouse with and without heating) are included. Life cycle assessment of the system was conducted, showing that algal biomethane production without greenhouse heating would have a net energy ratio of 1.54, which is slightly lower than that (1.78) of biomethane from ley crop. However, land requirement of the latter is approximately 68 times that of the former, because the area productivity of algae could reach at about 400 t/ha (dry basis) in half a year, while the annual productivity of ley crop is only about 5.8 t/ha. For the case of Växtkraft biogas plant in Västerås, Sweden, the integrated system has the potential to increase the annual biomethane output by 9.4%. This new process is very simple, which might have potential for scale-up and commercial application of algal bioenergy. © 2013 Elsevier Ltd. All rights reserved.

Keywords
Biogas plant, Cold region, Energy balance, Life cycle assessment, Microalgal biomethane
National Category
Engineering and Technology
Identifiers
urn:nbn:se:mdh:diva-19152 (URN)10.1016/j.apenergy.2013.04.087 (DOI)000329377800049 ()2-s2.0-84884283197 (Scopus ID)
Available from: 2013-06-10 Created: 2013-06-10 Last updated: 2018-01-03Bibliographically approved
Song, H., Thorin, E., Dotzauer, E., Nordlander, E. & Yan, J. (2013). Modeling and optimization of a regional waste-to-energy system: A case study in central Sweden. Waste Management, 33(5), 1315-1316
Open this publication in new window or tab >>Modeling and optimization of a regional waste-to-energy system: A case study in central Sweden
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2013 (English)In: Waste Management, ISSN 0956-053X, E-ISSN 1879-2456, Vol. 33, no 5, p. 1315-1316Article in journal, Editorial material (Other academic) Published
National Category
Social Sciences
Identifiers
urn:nbn:se:mdh:diva-20856 (URN)000319791200034 ()
Available from: 2013-08-02 Created: 2013-08-02 Last updated: 2017-12-06Bibliographically approved
Nordlander, E., Thorin, E. & Yan, J. (2013). Modeling of a full-scale biogas plant using a dynamic neural network. In: : . Paper presented at Sardinia 2013, S. Margherita di Pula, September 30 - October 4.
Open this publication in new window or tab >>Modeling of a full-scale biogas plant using a dynamic neural network
2013 (English)Conference paper, Oral presentation with published abstract (Refereed)
Keywords
neural network, anaerobic digestion, biogas, model
National Category
Bioprocess Technology Bioenergy Energy Systems
Research subject
Energy- and Environmental Engineering; Biotechnology/Chemical Engineering
Identifiers
urn:nbn:se:mdh:diva-21600 (URN)
Conference
Sardinia 2013, S. Margherita di Pula, September 30 - October 4
Available from: 2013-09-18 Created: 2013-09-18 Last updated: 2017-09-26Bibliographically approved
Li, H., Lindmark, J., Nordlander, E., Thorin, E., Dahlquist, E. & Zhao, L. (2013). Using the solid digestate from a wet anaerobic digestion process as an energy resource. Energy technology, 1(1), 94-101
Open this publication in new window or tab >>Using the solid digestate from a wet anaerobic digestion process as an energy resource
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2013 (English)In: Energy technology, ISSN 2194-4296, Vol. 1, no 1, p. 94-101Article in journal (Refereed) Published
Abstract [en]

The wet anaerobic digestion process is a widely used method to produce biogas from biomass. To avoid the risks involved with using the digestion waste as a fertilizer, this work investigates the possibilities to use the solid digestate as an energy resource to produce heat and electricity, which could save some energy currently consumed by the plant and, therefore, may increase the overall efficiency of a biogas plant. Simulations were conducted based on real data from the Växtkraft biogas plant in Västerås, Sweden as a case study. Results show that it is necessary to dry the solid digestate before combustion and include flue-gas condensation to recover enough heat for the drying process. When a steam turbine cycle is integrated, the generated electricity could cover 13–18 % of the total electricity consumption of the plant, depending on the degree of dryness. In addition, reducing the digestion period can increase the carbon content (ultimate analysis), the heating value, and the mass flow of the solid digestate. As a result, the production of electricity and heat is augmented in the steam turbine cycle. However, the production of biogas is reduced. Therefore, a comprehensive economic evaluation is suggested to optimize a biogas plant that uses the solid digestate from a wet anaerobic digestion process as an energy resource.

National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-16527 (URN)10.1002/ente.201200021 (DOI)000338343500021 ()2-s2.0-84977849977 (Scopus ID)
Available from: 2012-12-11 Created: 2012-12-11 Last updated: 2019-01-16Bibliographically approved
Wang, X., Nordlander, E., Thorin, E. & Yan, J. (2012). Microalgal Biomethane Production Integrated with an Existing Biogas Plant: A Case Study in Sweden. Paper presented at International Conference on Applied Energy ICAE 2012, Jul 5-8, 2012, Suzhou, China.
Open this publication in new window or tab >>Microalgal Biomethane Production Integrated with an Existing Biogas Plant: A Case Study in Sweden
2012 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Microalgae are considered as potential sources for biodiesel production due to the higher growth rate than terrestrial plants. However, the large-scale application of algal biodiesel would be limited by the downstream cost of lipid extraction and the availability of water, CO2 and nutrients. A possible solution is to integrate algae cultivation with existing biogas plant, where algae can be cultivated using the discharges of CO2 and digestate as nutrient input, and then the attained biomass can be converted directly to biomethane by existing infrastructures. This integrated system is investigated and evaluated in this study. Algae are cultivated in a photobioreactor in a greenhouse, and two cultivation options (greenhouse with and without heating) are included. Life cycle assessment of the system was conducted, showing that algal biomethane production without greenhouse heating would have a net energy ratio of 1.54, which is slightly lower than that (1.78) of biomethane from ley crop. However, land requirement of the latter is approximately 68 times that of the former, because the area productivity of algae could reach at about 400 t/ha (dry basis) in half a year, while the annual productivity of ley crop is only about 5.8 t/ha. For the case of Växtkraft biogas plant in Västerås, Sweden, the integrated system has the potential to increase the annual biomethane output by 9.4 %. This new process is very simple, which might have potential for scale-up and commercial application of algal bioenergy.

Keywords
Microalgal biomethane, Biogas plant, Life cycle assessment, Energy balance, Cold region
National Category
Energy Systems
Research subject
Energy- and Environmental Engineering
Identifiers
urn:nbn:se:mdh:diva-16374 (URN)
Conference
International Conference on Applied Energy ICAE 2012, Jul 5-8, 2012, Suzhou, China
Note

Paper ID: ICAE2012- A10560

Available from: 2012-12-04 Created: 2012-12-03 Last updated: 2013-12-04Bibliographically approved
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Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-3131-0285

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