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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
Öppna denna publikation i ny flik eller fönster >>A gridded optimization model for photovoltaic applications
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2020 (Engelska)Ingår i: Solar Energy, ISSN 0038-092X, E-ISSN 1471-1257, Vol. 202, s. 465-484Artikel i tidskrift (Refereegranskat) 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.

Ort, förlag, år, upplaga, sidor
Elsevier Ltd, 2020
Nationell ämneskategori
Energisystem
Identifikatorer
urn:nbn:se:mdh:diva-47529 (URN)10.1016/j.solener.2020.03.076 (DOI)000528209300040 ()2-s2.0-85082930947 (Scopus ID)
Tillgänglig från: 2020-04-16 Skapad: 2020-04-16 Senast uppdaterad: 2020-06-04Bibliografiskt granskad
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.
Öppna denna publikation i ny flik eller fönster >>Control of waste water treatment combined with irrigation
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2019 (Engelska)Konferensbidrag, Enbart muntlig presentation (Refereegranskat)
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.

Nyckelord
design, operation, nitrogen, phosphorous, material balance
Nationell ämneskategori
Teknik och teknologier Energiteknik
Forskningsämne
energi- och miljöteknik
Identifikatorer
urn:nbn:se:mdh:diva-46377 (URN)
Konferens
the 60th International Conference of Scandinavian Simulation Society, SIMS 2019, in Västerås, Sweden August 13-16, 2019
Forskningsfinansiär
Forskningsrådet Formas, 2018-02213
Tillgänglig från: 2019-12-15 Skapad: 2019-12-15 Senast uppdaterad: 2019-12-18Bibliografiskt granskad
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.
Öppna denna publikation i ny flik eller fönster >>Modelling the diffuse component of solar radiation using artificial intelligence techniques
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2018 (Engelska)Konferensbidrag, Poster (med eller utan abstract) (Refereegranskat)
Nationell ämneskategori
Energiteknik
Identifikatorer
urn:nbn:se:mdh:diva-41684 (URN)
Konferens
AGU2018
Tillgänglig från: 2018-12-18 Skapad: 2018-12-18 Senast uppdaterad: 2019-10-14Bibliografiskt granskad
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
Öppna denna publikation i ny flik eller fönster >>Investigating the possibility of applying an ADM1 based model to a full-scale co-digestion plant
2017 (Engelska)Ingår i: Biochemical engineering journal, ISSN 1369-703X, E-ISSN 1873-295X, Vol. 120, s. 73-83Artikel i tidskrift (Refereegranskat) 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).

Ort, förlag, år, upplaga, sidor
Elsevier, 2017
Nationell ämneskategori
Bioenergi
Identifikatorer
urn:nbn:se:mdh:diva-34634 (URN)10.1016/j.bej.2016.12.014 (DOI)000395603900009 ()2-s2.0-85009230307 (Scopus ID)
Tillgänglig från: 2017-01-16 Skapad: 2017-01-16 Senast uppdaterad: 2018-12-12Bibliografiskt granskad
Thorin, E., Nordlander, E., Lindmark, J., Schwede, S., Jansson, J., Hakalehto, E., . . . Den Boer, E. (2014). Possibilites for Optimization of Biorefinery process.
Öppna denna publikation i ny flik eller fönster >>Possibilites for Optimization of Biorefinery process
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2014 (Engelska)Rapport (Övrigt vetenskapligt)
Serie
ABOWE project reports ; O3.8
Nationell ämneskategori
Bioenergi
Identifikatorer
urn:nbn:se:mdh:diva-26894 (URN)
Tillgänglig från: 2014-12-10 Skapad: 2014-12-10 Senast uppdaterad: 2017-11-07Bibliografiskt granskad
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
Öppna denna publikation i ny flik eller fönster >>Microalgal biomethane production integrated with an existing biogas plant: A case study in Sweden
2013 (Engelska)Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 112, s. 478-484Artikel i tidskrift (Refereegranskat) 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.

Nyckelord
Biogas plant, Cold region, Energy balance, Life cycle assessment, Microalgal biomethane
Nationell ämneskategori
Teknik och teknologier
Identifikatorer
urn:nbn:se:mdh:diva-19152 (URN)10.1016/j.apenergy.2013.04.087 (DOI)000329377800049 ()2-s2.0-84884283197 (Scopus ID)
Tillgänglig från: 2013-06-10 Skapad: 2013-06-10 Senast uppdaterad: 2018-01-03Bibliografiskt granskad
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
Öppna denna publikation i ny flik eller fönster >>Modeling and optimization of a regional waste-to-energy system: A case study in central Sweden
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2013 (Engelska)Ingår i: Waste Management, ISSN 0956-053X, E-ISSN 1879-2456, Vol. 33, nr 5, s. 1315-1316Artikel i tidskrift, Editorial material (Övrigt vetenskapligt) Published
Nationell ämneskategori
Samhällsvetenskap
Identifikatorer
urn:nbn:se:mdh:diva-20856 (URN)000319791200034 ()
Tillgänglig från: 2013-08-02 Skapad: 2013-08-02 Senast uppdaterad: 2017-12-06Bibliografiskt granskad
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.
Öppna denna publikation i ny flik eller fönster >>Modeling of a full-scale biogas plant using a dynamic neural network
2013 (Engelska)Konferensbidrag, Muntlig presentation med publicerat abstract (Refereegranskat)
Nyckelord
neural network, anaerobic digestion, biogas, model
Nationell ämneskategori
Bioprocessteknik Bioenergi Energisystem
Forskningsämne
energi- och miljöteknik; bioteknik/kemiteknik
Identifikatorer
urn:nbn:se:mdh:diva-21600 (URN)
Konferens
Sardinia 2013, S. Margherita di Pula, September 30 - October 4
Tillgänglig från: 2013-09-18 Skapad: 2013-09-18 Senast uppdaterad: 2017-09-26Bibliografiskt granskad
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
Öppna denna publikation i ny flik eller fönster >>Using the solid digestate from a wet anaerobic digestion process as an energy resource
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2013 (Engelska)Ingår i: Energy technology, ISSN 2194-4296, Vol. 1, nr 1, s. 94-101Artikel i tidskrift (Refereegranskat) 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.

Nationell ämneskategori
Energiteknik
Identifikatorer
urn:nbn:se:mdh:diva-16527 (URN)10.1002/ente.201200021 (DOI)000338343500021 ()2-s2.0-84977849977 (Scopus ID)
Tillgänglig från: 2012-12-11 Skapad: 2012-12-11 Senast uppdaterad: 2019-01-16Bibliografiskt granskad
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.
Öppna denna publikation i ny flik eller fönster >>Microalgal Biomethane Production Integrated with an Existing Biogas Plant: A Case Study in Sweden
2012 (Engelska)Konferensbidrag, Publicerat paper (Refereegranskat)
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.

Nyckelord
Microalgal biomethane, Biogas plant, Life cycle assessment, Energy balance, Cold region
Nationell ämneskategori
Energisystem
Forskningsämne
energi- och miljöteknik
Identifikatorer
urn:nbn:se:mdh:diva-16374 (URN)
Konferens
International Conference on Applied Energy ICAE 2012, Jul 5-8, 2012, Suzhou, China
Anmärkning

Paper ID: ICAE2012- A10560

Tillgänglig från: 2012-12-04 Skapad: 2012-12-03 Senast uppdaterad: 2013-12-04Bibliografiskt granskad
Organisationer
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0002-3131-0285

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