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Publications (8 of 8) Show all publications
Ollas, P., Persson, J., Markusson, C. & Alfadel, U. (2018). Impact of Battery Sizing on Self-Consumption, Self-Sufficiency and Peak Power Demand for a Low Energy Single-Family House with PV Production in Sweden. In: 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC: . Paper presented at 7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018, 10 June 2018 through 15 June 2018 (pp. 618-623). Institute of Electrical and Electronics Engineers Inc.
Open this publication in new window or tab >>Impact of Battery Sizing on Self-Consumption, Self-Sufficiency and Peak Power Demand for a Low Energy Single-Family House with PV Production in Sweden
2018 (English)In: 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC, Institute of Electrical and Electronics Engineers Inc. , 2018, p. 618-623Conference paper, Published paper (Refereed)
Abstract [en]

This paper simulates the impact of battery sizing for an actual nearly-zero energy (NZEB) single-family house with solar PV located in Boras, Sweden. Simulations are done,° using measurement data as an input, for three different battery dispatch algorithms with two different purposes; (i) peak power shaving and (ii) maximising system self-consumption (SC) and self-sufficiency (SS) of the solar PV. The results show that the optimal battery storage size for this single-family house, given its measured electrical loads and existing solar PV system is around 7.2 kWh. System self-consumption and self-sufficiency from generated solar PV increased with 24.3 percentage points compared to a reference case without battery. Furthermore, results show that increasing the battery size beyond 7.2 kWh only results in minor performance gains.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc., 2018
Keywords
battery sizing, dispatch algorithms, NZEB, optimisation, photovoltaic, self sufficiency, self-consumption, target zero, Digital storage, Energy conversion, Houses, Optimisations, Self- consumption, Electric batteries
National Category
Engineering and Technology
Identifiers
urn:nbn:se:ri:diva-37956 (URN)10.1109/PVSC.2018.8548275 (DOI)2-s2.0-85059917269 (Scopus ID)9781538685297 (ISBN)
Conference
7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018, 10 June 2018 through 15 June 2018
Available from: 2019-04-23 Created: 2019-04-23 Last updated: 2019-06-27Bibliographically approved
Ollas, P., Markusson, C., Persson, J. & Alfadel, U. (2018). Impact of Battery Sizing on Self-Consumption, Self-Sufficiency and PeakPower Demand for a Low Energy Single-Family House With PVProduction in Sweden. In: 7th World Conference on Photovoltaic Energy Conversion (WCPEC-7), June 10-15, 2018: . Paper presented at 7th World Conference on Photovoltaic Energy Conversion (WCPEC-7), June 10-15, 2018.
Open this publication in new window or tab >>Impact of Battery Sizing on Self-Consumption, Self-Sufficiency and PeakPower Demand for a Low Energy Single-Family House With PVProduction in Sweden
2018 (English)In: 7th World Conference on Photovoltaic Energy Conversion (WCPEC-7), June 10-15, 2018, 2018Conference paper, Published paper (Refereed)
Abstract [en]

This paper simulates the impact of battery sizingfor an actual nearly-zero energy (NZEB) single-family housewith solar PV located in Bor°as, Sweden. Simulations are done,using measurement data as an input, for three different batterydispatch algorithms with two different purposes; (i) peak powershaving and (ii) maximising system self-consumption (SC) andself-sufficiency (SS) of the solar PV. The results show that theoptimal battery storage size for this single-family house, givenits measured electrical loads and existing solar PV system isaround 7.2 kWh. System self-consumption and self-sufficiencyfrom generated solar PV increased with 24.3 percentage pointscompared to a reference case without battery. Furthermore,results show that increasing the battery size beyond 7.2 kWhonly results in minor performance gains.

Keywords
battery sizing, self-consumption, selfsufficiency, photovoltaic, NZEB, optimisation, dispatch algorithms, target zero
National Category
Energy Systems
Identifiers
urn:nbn:se:ri:diva-35089 (URN)
Conference
7th World Conference on Photovoltaic Energy Conversion (WCPEC-7), June 10-15, 2018
Projects
Från solel till användare med minsta möjliga förlust – en fullskaledemonstration
Funder
Swedish Energy Agency
Available from: 2018-08-28 Created: 2018-08-28 Last updated: 2019-06-27Bibliographically approved
Kovacs, P., Ollas, P. & Hemlin, O. (2018). Regelmässiga förutsättningar för takrenoveringar och solcellsinstallationer – en litteratursammanställning. Borås
Open this publication in new window or tab >>Regelmässiga förutsättningar för takrenoveringar och solcellsinstallationer – en litteratursammanställning
2018 (Swedish)Report (Other academic)
Abstract [sv]

Rapporten redogör för en tvådelad litteratursammanställning som dels sammanfattar incitament och regelmässiga hinder vid renovering av flerbostadshus, och dels redogör för de generella regelverk, policys och andra förutsättningar vid installationer av solcellsanläggningar. Den första delen är resultatet av litteratursökningar och intervjuer om tillgängliga stöd och reglerverk och den andra delen baseras enbart på litteratursökning. För aktörer på beställar- och leverantörssidan med intresse för takrenovering med solceller, syftar rapporten till att ge en bild av förutsättningarna i form av incitament och hinder.

Den samlade bilden är att det pågår en snabb positiv utveckling kring incitament och regelverk specifikt för solceller och att även regelverk för energieffektivisering och miljöcertifiering kan motivera fastighetsägare till att ta ett sådant samlat grepp. Sammantaget utgör de styrande kraven – vid en renovering som klassas som en omfattande ändring – dock snarare ett hinder än en möjlighet för att genomföra de koncept som tagits fram i projektet.

Denna rapport utgör ett komplement till projektrapporten för projektet ”Miljontak – takrenovering med solceller” (Energimyndighetens projektnummer: 41857-1) och finns tillgänglig via E2B2’s hemsida - http://www.e2b2.se/.

Abstract [en]

The report presents a two-piece literature summary summarizing incentives and regulatory barriers to the renovation of multi-family houses, as well as general regulations, policies and other conditions for installations of solar cell installations. For developers and suppliers with interest in roof renovation with solar cells, the report aims to provide a picture of the conditions for such actions. The overall picture is that there is a rapid positive development of incentives and regulations specifically for solar cells. Additionally, regulations for energy efficiency and environmental certification can motivate property owners to carry out such combined approach.

This report complements the project report for project "Environmental Roofing - Solar Energy Redevelopment" (Energy Agency Project Number: 41857-1) and is available via E2B2's website - http://www.e2b2.se/.

Place, publisher, year, edition, pages
Borås: , 2018. p. 24
Series
RISE Rapport ; 2018:03
Keywords
Roof Renovation, Million Programme, Solar PV & Solar Cells, Takrenovering, Miljonprogrammet, Solceller, Solel
National Category
Architectural Engineering Construction Management Building Technologies
Identifiers
urn:nbn:se:ri:diva-32996 (URN)978-91-88695-38-3 (ISBN)
Projects
Miljontak – takrenovering med solceller
Funder
Swedish Energy Agency, 41857-1
Available from: 2018-01-05 Created: 2018-01-05 Last updated: 2018-08-15Bibliographically approved
Kovacs, P., Hemlin, O., Persson, J., Ollas, P., Larsson, D., Femenias, P., . . . Fahlen, E. (2018). Solceller som solavskärmning: Forskning, utveckling och demonstration.
Open this publication in new window or tab >>Solceller som solavskärmning: Forskning, utveckling och demonstration
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2018 (Swedish)Report (Other academic)
Abstract [en]

This report presents the implementation, results, discussion and conclusions of the project "Solar Shading in an Overall Perspective - From Energy Efficiency to Energy Production and from Product to Architecture". From 2015 to 2018, companies from the solar shading and solar PV industries, together with architects, researchers, contractors and property managers, have explored the area in order to increase interest, knowledge and acceptance for solar shading in various important target groups. A strong focus has been on the combination of solar cells and solar shadings in a product named electricity generating solar shading. Among the results is a literature summary and an experience feedback from eight installations, as well as a database of examples from about 70 solar-shading installations, most of which are built up of solar cells. A development effort in collaboration between solar shading- and solar PV companies has resulted in several new products that were evaluated in the project and now being demonstrated at RISE's office in Borås.

Publisher
p. 74
Keywords
Photovoltaics, Solar shading, multifunctional, BIPV, design, daylighting
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-37006 (URN)978-91-88907-03-5 (ISBN)
Available from: 2019-01-11 Created: 2019-01-11 Last updated: 2019-01-21Bibliographically approved
Sommerfeldt, N. & Ollas, P. (2017). Reverse engineering prototype solar pv/thermal collector properties from empirical data for use in TRNSYS Type 560. In: ISES Solar World Congress 2017 - IEA SHC International Conference on Solar Heating and Cooling for Buildings and Industry 2017, Proceedings: . Paper presented at ISES Solar World Conference 2017, SWC 2017 and 5th International Conference on Solar Heating and Cooling Conference for Buildings and Industry 2017, SHC 2017, 29 October 2017 through 2 November 2017 (pp. 1121-1132). International Solar Energy Society
Open this publication in new window or tab >>Reverse engineering prototype solar pv/thermal collector properties from empirical data for use in TRNSYS Type 560
2017 (English)In: ISES Solar World Congress 2017 - IEA SHC International Conference on Solar Heating and Cooling for Buildings and Industry 2017, Proceedings, International Solar Energy Society , 2017, p. 1121-1132Conference paper, Published paper (Refereed)
Abstract [en]

Using the known physical characteristics of a prototype photovoltaic-thermal (PVT) collector components and raw test data from a prematurely terminated ISO 9806 test, the objective of this study is to reverse engineer a thermal resistance value for the heat exchanger assembly for use in the theoretical TRNSYS model Type 560. Modeling is done using both TRNSYS as well as commercial heat transfer software TAITherm. Performance is measured by the mean absolute error and correlation of the outlet temperature and thermal power, as well as the differences in total thermal energy generated. The results show a thermal resistance of 0.005 to 0.010 m2 K W-1 in TAITherm and 0.010 to 0.040 m2 K W-1 in Type 560. TAITherm gives better statistical indicators which is likely due to the inclusion of thermal mass in the model. The results have informed prototype development and can be used in further systems modeling. © 2017. The Authors.

Place, publisher, year, edition, pages
International Solar Energy Society, 2017
Keywords
Prototype, PVT, Simulation, TAITherm, Testing, TRNSYS, Validation, Heat resistance, Reverse engineering, Solar heating, Heat exchangers
National Category
Energy Systems
Identifiers
urn:nbn:se:ri:diva-38118 (URN)10.18086/swc.2017.18.11 (DOI)2-s2.0-85050546712 (Scopus ID)9783981465976 (ISBN)
Conference
ISES Solar World Conference 2017, SWC 2017 and 5th International Conference on Solar Heating and Cooling Conference for Buildings and Industry 2017, SHC 2017, 29 October 2017 through 2 November 2017
Available from: 2019-03-07 Created: 2019-03-07 Last updated: 2019-03-07Bibliographically approved
Norberg, I., Pettersson, O., Gustavsson, A., Kovacs, P., Boork, M., Ollas, P., . . . Jältorp, H. (2015). Solel i lantbruket - realiserbar potential och nya affärsmodeller.
Open this publication in new window or tab >>Solel i lantbruket - realiserbar potential och nya affärsmodeller
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2015 (Swedish)Report (Other academic)
Publisher
p. 70
Series
JTI rapport Lantbruk och industri, ISSN 1401-4963 ; R433
National Category
Agricultural Sciences
Identifiers
urn:nbn:se:ri:diva-27757 (URN)
Available from: 2017-01-04 Created: 2017-01-04 Last updated: 2018-08-15
Ruud, S., Markusson, C., Nordén, J., Karlsson, H., Lindgren, M. & Ollas, P. (2013). Belysningen väg från el till rumstemperatur (ed.). Paper presented at .
Open this publication in new window or tab >>Belysningen väg från el till rumstemperatur
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2013 (Swedish)Report (Refereed)
Series
SP Rapport, ISSN 0284-5172 ; 2013:56
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-5133 (URN)15590 (Local ID)978-91-87461-43-9 (ISBN)15590 (Archive number)15590 (OAI)
Available from: 2016-09-07 Created: 2016-09-07 Last updated: 2019-06-27Bibliographically approved
Ossman, L., Ruud, S., Markusson, C., Kovacs, P., Ollas, P., Wendin, K., . . . Gustavsson, L. (2012). Nulägesanalys för satsning på NNE byggnader: slutrapport etapp 1 (ed.). Paper presented at .
Open this publication in new window or tab >>Nulägesanalys för satsning på NNE byggnader: slutrapport etapp 1
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2012 (Swedish)Report (Refereed)
Abstract [sv]

Det övergripande syftet med uppdraget är att få en detaljerad bild över byggnaders energiprestanda i Sverige. Den första etappen, förstudien, går ut på att beskriva metoden för hur denna analys ska göras. Som etapp 2 genomförs själva nulägesanalysen och slut¬ligen i etapp 3 analyseras resultat och slutsatser presenteras. I denna rapport redogörs för etapp 1, dvs metodbeskrivningen för nulägesanalysen. Nulägesanalysen ska senare kunna användas för att följa upp hur satsningar på Näranoll¬energibyggnader (NNE) påverkar energianvändningen i hela byggnadsbeståndet, inte bara i de faktiska demonstrationsprojekt som beviljas stöd och där uppföljning är betydligt enklare. Resultatet av nulägesanalysen, och den uppföljande analysen (planerad till 2015), ska i förlängningen kunna vara ett stöd när de nationella målnivåerna för näranollenergi-byggnader bestäms. I denna rapport redogörs för etapp 1, dvs metodbeskrivningen för nulägesanalysen. Rapporten beskriver vilka statistikkällor som finns idag samt en metod för hur dessa kan bidra till en mer detaljerad bild av byggnaders energiprestanda under ett valt referensår.

Series
SP Arbetsrapporter ; 2012:11
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-3853 (URN)13987 (Local ID)13987 (Archive number)13987 (OAI)
Available from: 2016-09-07 Created: 2016-09-07 Last updated: 2019-06-27Bibliographically approved
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-6060-5624

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