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Stridh, Bengt, UniversitetslektorORCID iD iconorcid.org/0000-0003-3168-1569
Publications (7 of 7) Show all publications
Campana, P. E., Cioccolanti, L., François, B., Jurasz, J., Zhang, Y., Stridh, B. & Yan, J. (2018). A Multi-Country Economic Analysis Of Lithium-Ion Batteries For Peak Shaving And Price Arbitrage In Commercial Buildings. In: : . Paper presented at 10th International Conference on Applied Energy (ICAE2018).
Open this publication in new window or tab >>A Multi-Country Economic Analysis Of Lithium-Ion Batteries For Peak Shaving And Price Arbitrage In Commercial Buildings
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2018 (English)Conference paper, Published paper (Refereed)
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-41688 (URN)
Conference
10th International Conference on Applied Energy (ICAE2018)
Available from: 2018-12-18 Created: 2018-12-18 Last updated: 2018-12-20Bibliographically approved
Zhang, Y., Campana, P. E., Yang, Y., Stridh, B., Lundblad, A. & Yan, J. (2018). Energy flexibility from the consumer: Integrating local electricity and heat supplies in a building. Applied Energy, 223, 430-442
Open this publication in new window or tab >>Energy flexibility from the consumer: Integrating local electricity and heat supplies in a building
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2018 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 223, p. 430-442Article in journal (Refereed) Published
Abstract [en]

The increasing penetration level of renewable energy requires more flexibility measures to be implemented in future energy systems. Integrating an energy consumer’s local energy supplies connects multiple energy networks (i.e., the electrical grid, the district heating network, and gas network) in a decentralized way. Such integration enhances the flexibility of energy systems. In this work, a Swedish office building is investigated as a case study. Different components, including heat pump, electrical heater, battery and hot water storage tank are integrated into the electricity and heat supply system of the building. Special focus is placed on the flexibility that the studied building can provide to the electrical grid (i.e., the building modulates the electricity consumption in response to the grid operator’s requirements). The flexibility is described by two metrics including the flexibility hours and the flexibility energy. Optimization of the component capacities and the operation profiles is carried out by using Mixed Integer Linear Programming (MILP). The results show that the system fully relies on electricity for the heat demand when not considering the flexibility requirements of the electrical grid. This suggests that district heating is economically unfavorable compared with using electricity for the heat demand in the studied case. However, when flexibility requirements are added, the system turns to the district heating network for part of the heat demand. The system provides great flexibility to the electrical grid through such integration. The flexibility hours can be over 5200 h in a year, and the flexibility energy reaches more than 15.7 MWh (36% of the yearly electricity consumption). The yearly operation cost of the system slightly increases from 62,273 to 65,178 SEK when the flexibility hours increase from 304 to 5209 h. The results revealed that flexibility can be provided from the district heating network to the electrical grid via the building.

Place, publisher, year, edition, pages
Elsevier Ltd, 2018
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-39298 (URN)10.1016/j.apenergy.2018.04.041 (DOI)000433649900030 ()2-s2.0-85046664444 (Scopus ID)
Available from: 2018-05-24 Created: 2018-05-24 Last updated: 2018-09-18Bibliographically approved
Molin, E., Stridh, B., Molin, A. & Waeckelgard, E. (2018). Experimental Yield Study of Bifacial PV Modules in Nordic Conditions. IEEE Journal of Photovoltaics, 8(6), 1457-1463
Open this publication in new window or tab >>Experimental Yield Study of Bifacial PV Modules in Nordic Conditions
2018 (English)In: IEEE Journal of Photovoltaics, ISSN 2156-3381, E-ISSN 2156-3403, Vol. 8, no 6, p. 1457-1463Article in journal (Refereed) Published
Abstract [en]

This study reports on the first full-year field study in Sweden using bifacial photovoltaic modules. The two test sites are located on flat roofs with a low albedo of 0.05 in Linkoping (58 degrees N) and were studied fromDecember 2016 to November 2017. Site 1 has monofacial and bifacial modules with a 40 degrees tilt facing south, which is optimal for annual energy yield for monofacial modules at this location. Site 2 has monofacial 40 degrees tilt south-facing modules and bifacial vertical east-west orientated modules. The annual bifacial energy gain (BGE) was5% at site 1 and1% at site 2 for albedo 0.05. The difference in power temperature coefficients between bifacial and monofacial modules was estimated to influence BG(E) by + 0.4 and + 0.1 percentage points on site 1 and 2, respectively. A higher albedo could be investigated on a sunny day with fresh snow for the bifacial east-west modules. The specific yield was 7.57 kWh/kW(p), which was a yield increase of 48% compared with tar paper at similar solar conditions.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2018
Keywords
Bifacial, field study, Nordic, Sweden, yield
National Category
Bioenergy
Identifiers
urn:nbn:se:mdh:diva-41374 (URN)10.1109/JPHOTOV.2018.2865168 (DOI)000448898400008 ()2-s2.0-85052612264 (Scopus ID)
Available from: 2019-02-14 Created: 2019-02-14 Last updated: 2019-06-18Bibliographically approved
Campana, P. E., Li, H., Zaccaria, V., Zhang, Y., Stridh, B. & Yan, J. (2018). Flexibility Services Provided by Building Thermal Inertia. In: : . Paper presented at International Conference on Energy, Ecology and Environment ICEEE 2018.
Open this publication in new window or tab >>Flexibility Services Provided by Building Thermal Inertia
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2018 (English)Conference paper, Published paper (Refereed)
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-41680 (URN)
Conference
International Conference on Energy, Ecology and Environment ICEEE 2018
Available from: 2018-12-18 Created: 2018-12-18 Last updated: 2018-12-20Bibliographically approved
Philippe, M., Larsson, D., Benson, J. & Stridh, B. (2018). Inventory on Existing Business Models, Opportunities and Issues for BIPV: IEA PVPS Task 15 Subtask B – Transition towards sound BIPV business models.
Open this publication in new window or tab >>Inventory on Existing Business Models, Opportunities and Issues for BIPV: IEA PVPS Task 15 Subtask B – Transition towards sound BIPV business models
2018 (English)Report (Other academic)
Abstract [en]

Building integrated photovoltaics (BIPV) can have a vastly different business model than other PV installations; applied on buildings or ground mounted. Business models for ordinary PV installations generally focus only on revenues from the electricity generated, whereas BIPV has the potential to also reduce costs through the replacement of other building materials.

This report includes examples of various BIPV installations ranging from simple in-roof installations to innovative facade designs. The timing of introducing BIPV in the design process affects the complexity of the façade. The façade examples cover the use of standard modules to custom-made modules adapted to the design. The BIPV roof examples cover both small, simple in-roof installations and a full roof BIPV solution. Results from the studied cases, show that only one of the involved companies have a BIPV-specific business model in place.

A basic BIPV-specific business model could be based solely on cost savings from replacing other building materials and revenues from electricity generation. This is viable if the BIPV installation has sufficiently low cost, or if the value of the replaced materials and electricity generated is sufficiently high. A BIPV specific business model is found in the case with a full BIPV roof, an installation that arose from the need for a roof renovation. The other examples are also based on material savings and electricity revenues but many were made with publicly funded incentives like investment subsidies.

The purpose of the case study is to identify the main drives for choosing BIPV in each example. These drives and values can be used as a basis in the development of new business models. For example, there is a green value, i.e. value of being environmentally friendly and sustainable, attached to PV, which could be significantly higher for a good looking, architecturally integrated BIPV installation than for the average PV system. For example, the green identity attracts high paying customers as tenants in two of the cases, which allows for higher rental fees. Future work is needed to explore ways to fully capture and monetize the green value of a building with BIPV.

Another business model, shown in one example, could be to build and sell the building at a premium. So far, there is no clear evaluation of the price premium of a building with BIPV. On the other hand, compared to the total cost of a new building, the cost of a BIPV installation is seemingly moderate. In two of the examples with large BIPV facades, the added cost was only 1-2 % of the building cost. A leasing arrangement with the utilty is also described in one example.

In the future, it is likely that BIPV must cope without investment subsidies and that electricity revenues will be high from self-consumption, but low from excess production. Highlighted in the analysis of regulatory environment is the need for collective self-consumption to be allowed. BIPV can also benefit from regulatory measures imposing a reduced purchased energy demand of new or retrofitted buildings.

Publisher
p. 54
Series
Report IEA-PVPS T15 ; 03:2018
Keywords
Photovoltacis, Building integrated, BIPV, Solceller, byggnadsintegrering
National Category
Engineering and Technology
Research subject
Energy- and Environmental Engineering
Identifiers
urn:nbn:se:mdh:diva-41557 (URN)978-3-906042-70-1 (ISBN)
Funder
Swedish Energy Agency, 40320-1
Available from: 2018-12-14 Created: 2018-12-14 Last updated: 2018-12-17Bibliographically approved
Stridh, B., Yard, S., Larsson, D. & Karlsson, B. (2014). Profitability of PV electricity in Sweden. In: 2014 IEEE 40TH PHOTOVOLTAIC SPECIALIST CONFERENCE (PVSC): . Paper presented at 40th Photovoltaic Specialist Conference (PVSC), 2014, 8-13 June 2014, Denver, Colorado, USA (pp. 1492-1497). IEEE
Open this publication in new window or tab >>Profitability of PV electricity in Sweden
2014 (English)In: 2014 IEEE 40TH PHOTOVOLTAIC SPECIALIST CONFERENCE (PVSC), IEEE , 2014, p. 1492-1497Conference paper, Published paper (Refereed)
Abstract [en]

The Swedish PV market is still limited compared to many other countries in Europe. However, the growth is strong. 19 MW was installed in 2013 showing that the market more than doubled during 2013 in comparison to 2012. Hence there is of interest to more in detail study the profitability of PV electricity in Sweden for grid connected PV systems, to understand how competitive PV is on the Swedish market. LCOE and payback period are presented for a PV system that is installed to replace retail electricity with PV electricity. Both the cases of private residential systems and of non-private systems are considered.

Place, publisher, year, edition, pages
IEEE, 2014
Keywords
photovoltaics, LCOE, payback, Sweden
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-38398 (URN)10.1109/PVSC.2014.6925198 (DOI)000366638901158 ()2-s2.0-84912094879 (Scopus ID)978-1-4799-4398-2 (ISBN)
Conference
40th Photovoltaic Specialist Conference (PVSC), 2014, 8-13 June 2014, Denver, Colorado, USA
Available from: 2018-02-09 Created: 2018-02-09 Last updated: 2019-01-10Bibliographically approved
Larsson, D., Stridh, B. & Karlsson, B. (2014). Solar Electricity in Swedish District Heating Areas: Effective Energy Measures in Apartment Buildings to Increase the Share of Renewable Energy in Europe. In: Anna Land (Ed.), Proceedings from the 14th International Symposium on District Heating and Cooling: . Paper presented at The 14th International Symposium on District Heating and Cooling, Stockholm, Sweden, 7-9 September, 2014. Stockholm: Svensk Fjärrvärme
Open this publication in new window or tab >>Solar Electricity in Swedish District Heating Areas: Effective Energy Measures in Apartment Buildings to Increase the Share of Renewable Energy in Europe
2014 (Swedish)In: Proceedings from the 14th International Symposium on District Heating and Cooling / [ed] Anna Land, Stockholm: Svensk Fjärrvärme , 2014Conference paper, Published paper (Refereed)
Abstract [en]

To overcome the climate challenge is one of the greatest tasks of our time. In EU, renovating the existing building stock has been found an effective measure. In Swedish buildings with district heating, lowering heat demand could be questioned, because the energy used is mainly renewable bio energy or waste heat from industries. In addition many district heating systems cogenerate electricity, which could reduce the overall European greenhouse gas emissions.

The aim of this article is to find effective measures for Swedish apartment buildings, in order to increase the share of renewable energy in European energy consumption. As a basis we use a previous study of energy saving potentials in apartment buildings. Added to this we study the impact of heat savings in 30 of Sweden’s largest district heating systems.

The results show that on average heat reductions will lead to a decreased share of renewable energy, while electricity reductions will lead to an increased share of renewables. Of the investigated measures, using photovoltaics for local solar electricity generation has the largest potential.

Our conclusion is that using the potential of solar electricity production should be considered in national energy policy and future building requirements. Heat reduction, on the other hand, could have lower priority in district heating areas, at least for existing buildings.

Place, publisher, year, edition, pages
Stockholm: Svensk Fjärrvärme, 2014
Keywords
energy efficiency, renewable energy, photovoltaics, solar electricity, district heating, apartment buildings
National Category
Energy Engineering
Research subject
Energy- and Environmental Engineering
Identifiers
urn:nbn:se:mdh:diva-26929 (URN)978-91-85775-24-8 (ISBN)
Conference
The 14th International Symposium on District Heating and Cooling, Stockholm, Sweden, 7-9 September, 2014
Funder
Knowledge Foundation
Available from: 2015-01-23 Created: 2014-12-16 Last updated: 2015-02-23Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-3168-1569

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