Design and comparative analysis of grid-connected BIPV system with monocrystalline silicon and polycrystalline silicon in Kandahar climate
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Building integrated photovoltaic (BIPV) system is a new and modern technique for solar energy production in Kandahar. Due to its location, Kandahar has abundant sources of solar energy. People use both monocrystalline and polycrystalline silicon solar PV modules for the grid-connected solar PV system, and they don’t know that which technology performs better for BIPV system. This paper analysis the parameters, described by IEC61724 “Photovoltaic System Performance Monitoring Guidelines for Measurement, Data Exchange and Analysis” to evaluate which technology shows better performance for the BIPV system. The monocrystalline silicon BIPV system has a 3.1% higher array yield than the polycrystalline silicon BIPV system. The final yield is 0.2% somewhat higher for monocrystalline silicon than polycrystalline silicon. Monocrystalline silicon has 0.2% and 4.5% greater yearly yield factor and capacity factors than polycrystalline silicon respectively. Monocrystalline silicon shows 0.3% better performance than polycrystalline silicon. With 1.7% reduction and 0.4% addition in collection losses and useful energy produced respectively, monocrystalline silicon solar PV system shows good performance than polycrystalline silicon solar PV system. But system losses are the same for both technologies. The monocrystalline silicon BIPV system injects 0.2% more energy to the grid than the polycrystalline silicon BIPV system.Keywords:
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Building Integrated Photovoltaics
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Silicon is the most important material among all kinds of solar cells materials .This paper reviewed the study status of monocrystalline silicon?polycrystalline silicon?silicon ribbons?amorphous silicon and polycrystalline silicon thin film materials, discussed the related problems and development current.
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Nanocrystalline silicon
Hybrid silicon laser
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Building integrated photovoltaic (BIPV) system is a new and modern technique for solar energy production in Kandahar. Due to its location, Kandahar has abundant sources of solar energy. People use both monocrystalline and polycrystalline silicon solar PV modules for the grid-connected solar PV system, and they don’t know that which technology performs better for BIPV system. This paper analysis the parameters, described by IEC61724 “Photovoltaic System Performance Monitoring Guidelines for Measurement, Data Exchange and Analysis” to evaluate which technology shows better performance for the BIPV system. The monocrystalline silicon BIPV system has a 3.1% higher array yield than the polycrystalline silicon BIPV system. The final yield is 0.2% somewhat higher for monocrystalline silicon than polycrystalline silicon. Monocrystalline silicon has 0.2% and 4.5% greater yearly yield factor and capacity factors than polycrystalline silicon respectively. Monocrystalline silicon shows 0.3% better performance than polycrystalline silicon. With 1.7% reduction and 0.4% addition in collection losses and useful energy produced respectively, monocrystalline silicon solar PV system shows good performance than polycrystalline silicon solar PV system. But system losses are the same for both technologies. The monocrystalline silicon BIPV system injects 0.2% more energy to the grid than the polycrystalline silicon BIPV system.
Polycrystalline silicon
Building Integrated Photovoltaics
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Through the experiment,the results show that the sheet resistance of polycrystalline silicon wafer changes in different ways under different oxidation temperatures.Under high temperature,the sheet resistance of polycrystalline silicon lowers after oxidation;under low temperature,the sheet resistance of polycrystalline silicon rises after oxidation.However,the sheet resistance of monocrystalline silicon always lowers under any temperature.Compared with monocrystalline silicon,it is the special structure of polycrystalline silicon that makes the sheet resistance change in different trends.
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The paper compares the performance of three Silicon-based technologies, two of which are based on high-performance monocrystalline Silicon cells (back-contact and HIT), and one is based on polycrystalline Silicon cells. The analysis is conducted considering two different types of supports, a 30° fix-tilt rack and a single axis tracker. Such an evaluation is, to the author's knowledge, unique in the Alpine region.
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Abstract Future crystalline silicon solar cells will have increased performance and reduced cost. Increased performance will come from thin silicon with light trapping, provided that it includes back‐surface passivation. Cost reduction will come from the growth of this thin silicon light‐trapping structure on a low‐cost substrate. the silicon will be polycrystalline. Solar cells formed with thin (< 50 μm) silicon active layers can produce higher conversion efficiencies at reduced material requirements than conventional ingot‐based silicon devices. This paper presents the essential features of high‐performance device design based on thin silicon layers, the design features of the Silicon‐Film −TM technology, the sequence of products that emerge from its development and recent results from the first commercial‐scale, large‐area (225 cm −2 ) Silicon‐Film −TM solar cell product.
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The majority of modern solar cells are still manufactured from silicon, either on polycrystalline or monocrystalline wafers. One of the long existing challenges for crystalline-silicon solar cells is the high cost of solar-grade silicon wafer production. Here, we demonstrate a simple process for making silicon films directly via a one-step electrodeposition process in molten salt for solar cell applications. Compact, high quality silicon can be deposited with successfully. Proof-of-concept solar cell devices are fabricated demonstrated.
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