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- Ollas, Patrik, 1987, et al.
(författare)
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Effect of Energy Storage on Self-Consumption and Self-Sufficiency: A Field Study in a Nordic Climate
- 2021
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Ingår i: EU PVSEC Conference Proceedings. - 2196-100X. - 3936338787 ; , s. 1459-1463
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Konferensbidrag (refereegranskat)abstract
- This paper examines the variation in self-consumption and self-sufficiency for eight residential-size solar photovoltaic systems under Nordic climate conditions. The work uses measured photovoltaic array performances with a 30-second temporal resolution and is evaluated for a full year’s operation. One of the systems is operated with battery storage to examine the effect on the system’s self-consumption and self-sufficiency, where the simulated load profile is taken from a single-family residential building in Sweden. The results show a consistent negative correlation between array size and self-consumption. The relation between array size and self-sufficiency is more sensitive and is also affected by the mix of PV technologies represented in the test. Adding battery storage increases the self-consumption in the range of 0-30 percentage points weekly. Furthermore, the variation of self-consumption and self-sufficiency follow the seasonal variation in solar resource and load size and illustrate the battery’s eventual redundancy in the winter when the battery’s objective function is to maximize self-consumption.
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| 2. |
- Ollas, Patrik, 1987, et al.
(författare)
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Technical Performance Evaluation of BIPV and BAPV Systems
- 2021
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Ingår i: EU PVSEC Conference Proceedings. - 2196-100X. - 3936338787 ; , s. 1071-1076
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Konferensbidrag (refereegranskat)abstract
- In this work, seven residential solar photovoltaic systems are evaluated for their technical performance under a full year’s operation in Sweden, at latitude 57.72. The system technologies are selected to reflect available products on the Swedish market and include three building attached (BAPV) and five building-integrated (BIPV) systems. The evaluation is done for the performance ratio (PR) and temperature corrected PR, and the results highlight the seasonal variation and effect from the modules' temperature dependency. The annual losses due to operation at elevated temperature are also quantified for each system, using a temperature-compensated power output, and the results show that the losses are 1-3.2% on the measured yield, depending on the PV technology and extent of roof integration (BIPV or BAPV).
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