| 1. |
- Brytting, Tomas, 1956-, et al.
(författare)
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Pinsamt, Svenskt Näringsliv
- 2007
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Ingår i: Svenska dagbladet. - Stockholm : Hb Svenska dagbladets AB & Co. - 1101-2412. ; :13 december
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Tidskriftsartikel (populärvet., debatt m.m.)
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| 2. |
- Brytting, Tomas, 1956-, et al.
(författare)
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Svenskt Näringsliv slår in öppna dörrar
- 2007
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Ingår i: Svenska dagbladet. - Stockholm : Hb Svenska dagbladets AB & Co. - 1101-2412. ; :22 december
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Tidskriftsartikel (populärvet., debatt m.m.)
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| 3. |
- Franck, Per-Åke, 1953, et al.
(författare)
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Process integration of various types of heat pumps
- 1990
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Ingår i: Föredrag vid BHRA International Conference on Applications and Efficiency of Heat Pump Systems in Environmentally Sensitive Times, Munchen, Västtyskland. 1-3 Oktober 1990.
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Konferensbidrag (refereegranskat)
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| 4. |
- Franck, Per-Åke, 1953, et al.
(författare)
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Värmepumpar i industriella processer
- 1991
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Ingår i: Föredrag vid 5:E Nordiske Varmepumpdage, Lyngby, Danmark, 29-31 maj 1991.
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Konferensbidrag (refereegranskat)
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| 5. |
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| 6. |
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| 7. |
- Palmgren, Erik, et al.
(författare)
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Analysis of late mid-Neolithic pottery illuminates the presenceof a Corded Ware Culture on the Baltic Island of Gotland
- 2015
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Ingår i: Documenta Praehistoria. - Ljubljana : Ljubljana University Press. - 1854-2492 .- 1408-967X. ; 42, s. 297-310
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, we discuss variations seen in the ornamentation and modes of manufacturingpottery from the end of the mid-Neolithic 4600–4300 BP on the Island of Gotland in theBaltic Sea. The Pitted Ware cultural groups have been discussed as a western influence from the Swedishmainland, but the aDNA on skeletal remains point to eastern influences. We analyse and discusspottery from the well-investigated Ajvide Pitted Ware site and what these variations mean interm of intra- and inter-island relationships, ethnicity and change, and we suggest the developmentof what could be described as a hybrid culture.
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| 8. |
- Shabani, Masoume, et al.
(författare)
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Comparison of the optimal design of PV-battery and PV-PHS off-grid energy systems-a case study in Sweden
- 2019
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Ingår i: Volume 5. - Mälardalen University.
-
Konferensbidrag (refereegranskat)abstract
- This study deals with the investigating of the potential of employing two energy storage technologies., i.e. battery storage and pumped hydro storage (PHS), for PV powered supply system on a small island in Sweden. The optimal design of two hybrid PV-Battery and PV-PHS systems are compared and analyzed. Genetic Algorithm (NSGA-II) is employed as the optimization algorithm. Investment cost and loss of power supply probability are considered as objective functions. Number of PV modules and battery capacity are considered as design variables for PV-Battery system and a wide range of design variables including number of PV modules, turbine capacity, pump capacity, volume, installation height and depth to diameter ratio of reservoir, pipes diameters constitute for PV-PHS system. As a result, a hybrid pareto front is proposed for case study, that means, regarding objective functions, designer can decide that which of two systems are more suitable for current case study. The results show that pareto fronts of two hybrid systems intersect each other at a point. In this case, PV-PHS led to the lower pareto front for LPSPs up to about 6.94% and for LPSPs higher than 6.94%, pareto front of PV-PHS system lies above that of PVBattery system. This implies that under LPSPs range of 0- 6.94%, the PV-PHS system resulted in the lower initial cost, therefore, it is better option for the current case study. In contrast, for LPSPs higher than 6.94%, for the same LPSP, PV-Battery system led to the lower investment cost in comparison with PV-PHS, so it can be chosen as a better option regarding designer’s priorities. Also, results show that the proposed strategy can reach a design with the full satisfaction of fluctuating demand and system constraints. In this case, for the yearly average demand of 16.3 kW, the investment cost is obtained to be 2.1M$ and 1.87 M$ for the PV-battery and PV-PHS, respectively. The paper compares in detail the optimal designs and operations obtained for the two hybrid PV-Battery and PV-PHS systems.
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| 9. |
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| 10. |
- Shabani, Masoume, et al.
(författare)
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Smart and optimization-based operation scheduling strategies for maximizing battery profitability and longevity in grid-connected application
- 2024
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Ingår i: Energy Conversion and Management. - : Elsevier. - 2590-1745. ; 21
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Tidskriftsartikel (refereegranskat)abstract
- Lithium-ion battery storage has emerged as a promising solution for various energy systems. However, complex degradation behavior, relatively short lifetime, high capital, and operational costs, and electricity market volatility are critical factors that challenge its practical viability. Thus, to ensure sustained profitability of Lithium-ion batteries in real-life applications, a smart and optimal management strategy considering key influencing factors is imperative for achieving efficient battery utilization. This study proposes two day-ahead battery-behavior-aware operation scheduling strategies to maximize profitability and longevity in residential grid-connected applications with dynamic electricity pricing. Each scenario employs unique approaches to make optimal decisions for optimal battery utilization. The first scenario optimizes short-term profitability by prioritizing revenue gains under three charge/discharge rates (high, moderate, low), considering daily charge and discharge timings as decision variables. Conversely, the second scenario proposes a smart strategy capable of making intelligent decisions on a wide range of variables to simultaneously maximize revenue and minimize degradation costs, ensuring short-term and long-term profitability. Decision variables include the cycle frequency for each specific day, timings as well as durations for charging and discharging per cycle. To ensure effective long-term assessment, both scenarios accurately estimate battery performance, calendric and cyclic capacity degradations, remaining-useful-lifetime, and internal states under real operational conditions until battery reaches its end-of-life criteria. The scenarios are assessed economically using various indicators. Furthermore, the impact of battery price and size on optimization outcomes are examined. The key findings indicate that, among the first set of scenarios, the strategy with low charge/discharge rate extends the battery lifetime most efficiently, estimated at 14.8 years. However, it proved to be the least profitable, resulting in negative profit of −3€/kWh/yr. On the other hand, strategies with high and moderate charge/discharge rates resulted in positive profit of 8.3 €/kWh/year and 9.2 €/kWh/year, despite having shorter battery lifetimes, estimated at 10.1 years and 13.6 years, respectively. Furthermore, from a payback perspective, the strategy with fast charge/discharge capability led to 1.5 years shorter payback period than that of the moderate rate strategy. The findings highlight that the first set of scenarios limits the strategy's flexibility in achieving both sustainability and profitability. In contrast, the second scenario achieves impressive profit (18 €/kWh/yr), shortest payback period (7.5 year), a commendable lifespan (12.5 years), contrasting revenue-focused scenarios, emphasizing the importance of striking optimal balance between revenue gain and degradation costs for charging/discharging actions, ensuring sustained profitability. The findings offer valuable insights for decision-makers, enabling informed strategic choices and effective solutions.
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