Journal articles: 'Sunpower'

1

Corum, Lyn. "SunPower looks to innovation to reduce costs." Renewable Energy Focus 11, no. 6 (November 2010): 36–38. http://dx.doi.org/10.1016/s1755-0084(10)70134-4.

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Linderman, Ryan J., Zachary S. Judkins, Michael Shoecraft, and Matt J. Dawson. "Thermal Performance of the SunPower Alpha-2 PV Concentrator." IEEE Journal of Photovoltaics 2, no. 2 (April 2012): 196–201. http://dx.doi.org/10.1109/jphotov.2011.2178397.

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O’Sullivan, B. J., M. Haslinger, S. Singh, T. Bearda, Maarten Debucquoy, and J. Szlufcik. "Ozone Base Cleaning: Impact on High Efficiency Interdigitated Back Contact Solar Cells." Solid State Phenomena 219 (September 2014): 312–16. http://dx.doi.org/10.4028/www.scientific.net/ssp.219.312.

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Interdigitated back contacted (IBC) silicon solar cells have long been shown as high conversion efficiency solar cells, with values as high as 25.0% reported by Sunpower [1]. Such high efficiencies are enabled by the cell structure, with the absence of front side metal shading, which can then be optimised from optical and passivation perspectives. High bulk lifetime silicon and a low series resistance metallisation scheme can also enhance the efficiencies. Other advantages include the easier module incorporation given both metal contacts are located on the rear of the cell.

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Tsai, Chieh-Wa, Tung-Kuan Liu, and Po-Wen Hsueh. "Patent Analysis of High Efficiency Tunneling Oxide Passivated Contact Solar Cells." Energies 13, no. 12 (June 12, 2020): 3060. http://dx.doi.org/10.3390/en13123060.

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High efficiency tunneling oxide passivated contact (TOPCon) solar cell is the traditional PN junction structure, combined the advantages of using a thin film of the passivated silicon surface to separate the metal from the silicon wafer. In this study, the patent analysis of high efficiency TOPCon solar cell is presented. The structure and process technology of TOPCon solar cell were analyzed first, which is used as the basis for the key words of the patent search. The patent management chart analysis is provided, and then the patent portfolio of the main research countries and important manufacturers on the research subject can be recognized. Moreover, the technology-function matrix analysis is used to comprehend the technical development trend of the research topic. The results indicate the TOPCon solar cell technology currently entered into the maturity stage in 2019, and the companies with the top three number of patents are LG Electronics, SunPower, and SolarCity (which was acquired by Tesla in 2016). SunPowern is the earliest patent assignee, and LG Electronics is the follower, while its patent outputs are heavily concentrated after 2014. Patent technology-function matrix found the development focus of the device-related technologies are tunneling oxide and polycrystalline silicon, with a total of 21 patents, and the development focus of process-related technologies are the process of tunneling oxide layers and the process of polysilicon film. Based on the analysis results, the future development prospects of the research topic and the direction of patent portfolio are evaluated.

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Mustafi, Shuvo, Stuart Banks, Kim Shirey, and Susan Breon. "Qualifying the Sunpower M87N cryocooler for operation in the AMS-02 magnetic field." Cryogenics 44, no. 6-8 (June 2004): 575–80. http://dx.doi.org/10.1016/j.cryogenics.2004.02.006.

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6

Sharma, K., AD Assefa, S. Kim, EY Ko, and SW Park. "Change in chemical composition of onion (Allium cepaL.cv. Sunpower) during post-storage under ambient conditions." New Zealand Journal of Crop and Horticultural Science 42, no. 2 (January 3, 2014): 87–98. http://dx.doi.org/10.1080/01140671.2013.860039.

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7

Lee, Jongtae, Byeonggyu Min, Heedae Kim, Juyeon Kim, Young-Seok Kwon, and George E. Boyhan. "Effects of Nonwoven Polypropylene Covering during Overwintering on Growth and Bulb Yield of Intermediate-day Onion." HortScience 54, no. 2 (February 2019): 303–10. http://dx.doi.org/10.21273/hortsci13465-18.

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This study evaluated the effects of a nonwoven polypropylene (NPP) covering during overwintering with different mulch types and transplant times on bulb onion growth and yield of intermediate-day onions (Allium cepa L.) during the 2015/2016 and 2016/2017 growing seasons. Field experiments were conducted using a split-split plot design with three replicates. Treatments included main plots containing different mulch types (transparent plastic mulch, black plastic mulch, or bare ground), subplots with different transplanting times (20 Oct., 5 Nov., and 20 Nov.), and sub-subplots containing two onion cultivars (Sunpower and Katamaru). NPP was used to cover all plots on 1 Dec., and it was removed on 28 Feb. Mean daily air temperatures during transplanting and root establishment were 2.6 °C higher during the 2015/2016 growing season compared with the 2016/2017 season. NPP covering on bare ground increased soil temperature by 2.1 °C compared with no treatment. Soil water potential with transparent and black mulches and NPP continued to be more than −10 kPa until early March. Number of leaves, and root and leaf weight were significantly greater during the 2015/2016 growing season than during the 2016/2017 growing season; there were also significantly greater for onion plants grown with transparent plastic mulch than for those grown with black plastic mulch or no mulch on 4 Apr. and 5 May. Marketable bulb yield was lower during 2015/2016 (32.0 Mg·ha−1) than during 2016/2017 (38.5 Mg·ha−1); this was due to the increased unmarketable bulb yield, with 33.2 Mg·ha−1 bolters and 3.9 Mg·ha−1 doubled bulbs during 2015/2016 compared with 3.9 Mg·ha−1 bolters and 0.3 Mg·ha−1 doubled bulbs during 2016/2017. Marketable bulb yield of ‘Katamaru’ (38.9 Mg·ha−1) was greater than that of ‘Sunpower’ (31.6 Mg·ha−1). Marketable bulb yield increased with later transplanting times, and onions grown with black plastic mulch achieved the highest bulb yield (43.0 Mg·ha−1), followed by transparent mulch (34.7 Mg·ha−1) and no mulch (28.0 Mg·ha−1). When the temperatures from early November to early December were similar to the 30-year average temperatures, marketable bulb yield could increase with the NPP covering, especially for onions grown with black plastic mulch or no mulch when transplanted from late October to early November.

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Doulfikar, Amine, Ian Cabales, Akash Hossan, Jeff Bloemink, and Pooya Taheri. "Solar Power Generation System for the Canadian Space Agency STRATOS Program." E3S Web of Conferences 239 (2021): 00006. http://dx.doi.org/10.1051/e3sconf/202123900006.

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This paper discusses the design and application of solar photovoltaics (PV) under aerospace conditions. The application of solar PV that is addressed is the Power Distribution Unit (PDU) for the Canadian Space Agency’s (CSA) stratospheric balloon (STRATOS) program. The PDU utilizes four 1 kWh Battery Unit (BUs) that have been sized with volume and weight restrictions in mind. Without the capacity to provide enough energy to support multi-day missions, they are thus supplemented by the solar power generation subsystem presented in this paper. The power generation sub-system includes a bespoke solar panel design and a centralized Maximum Power Point Tracking (MPPT) power conversion unit to maximize the power output of solar panels. The centralized unit can accommodate up to eight solar panels, each consisting of nine individual C60 SunPower solar cells. The centralized MPPT unit consists of two MPPT controllers, each controller supporting up to four solar panels. The MPPT unit is modular and can be easily integrated to the CSA’s existing intelligent Battery Management System (BMS).

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9

Chao, Kuei-Hsiang, and Muhammad Nursyam Rizal. "A Hybrid MPPT Controller Based on the Genetic Algorithm and Ant Colony Optimization for Photovoltaic Systems under Partially Shaded Conditions." Energies 14, no. 10 (May 18, 2021): 2902. http://dx.doi.org/10.3390/en14102902.

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A maximum power point tracking (MPPT) controller was used to make the photovoltaic (PV) module operate at its maximum power point (MPP) under changing temperature and sunlight irradiance. Under partially shaded conditions, the characteristic power–voltage (P–V) curve of the PV modules will have more than one maximum power point, at least one local maximum power point and a global maximum power point. Conventional MPPT controllers may control the PV module array at the local maximum power point rather than the global maximum power point. MPPT control can be also implemented by using soft computing methods (SCM), which can handle the partial shade problem. However, to improve the robustness and speed of the MPPT controller, a hybrid MPPT controller has been proposed that combines two SCMs, the Genetic Algorithm (GA) and Ant Colony Optimization (ACO). Matlab was used in a simulation of a GA-ACO MPPT controller where four SunPower SPR-305NE-WHT-D PV modules with a maximum power of 305.226 W connected in series were used under conditions of partial shade to investigate the performance of the proposed MPPT controller. The results obtained were analyzed and compared with others obtained under perturb and observe (P&O) MPPT and conventional ACO MPPT controllers were observed.

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10

Torres, Joao, Joao Fernandes, Carlos Fernandes, Branco Costa, Catarina Barata, and Joao Gomes. "Effect of the collector geometry in the concentrating photovoltaic thermal solar cell performance." Thermal Science 22, no. 5 (2018): 2243–56. http://dx.doi.org/10.2298/tsci171231273t.

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The aim of this work is the redesign of the reflector geometry in hybrid concentrating collectors that are currently manufactured by SOLARUS Sunpower AB** to improve the energy efficiency of their solar collectors. The analysis is first accomplished using a numerical model that uses geometrical optics to study the interaction between the sunlight and a concentrating collector along the year. More complex physical models based on open-source and advanced object-oriented Monte Carlo ray tracing programs (SolTrace, Tonatiuh) have been used to study the relation between the collector annual performance and its geometry. On an annual performance basis, a comparative analysis between several solar collector geometries was effectuated to search for higher efficiencies but with controlled costs. Results show that efficiency is deeply influenced by reflector geometry details, collector tilt and location (latitude, longitude) of the solar panel installation and, mostly, by costumer demands. Undoubtedly, the methodology presented in this paper for the design of the solar collector represents an important tool to optimize the binomial cost/effectiveness photovoltaic performance in the energy conversion process. The results also indicate that some modified concentrating solar collectors are promising when evaluating the yearly averaged energy produced per unit area, leading to evident improvements in the performance when compared to the current standard solar concentrating SOLARUS systems. Increases of about 50% (from 0.123 kW/m2 to 0.1832 kW/m2) were obtained for the yearly average collected power per reflector area when decreasing the collector height in 3.5% (from 143 mm to 138 mm).

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11

Muralidharan, Pradyumna, Stephen M. Goodnick, and Dragica Vasileska. "Multiscale modeling of transport in silicon heterojunction solar cells." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2017, DPC (January 1, 2017): 1–15. http://dx.doi.org/10.4071/2017dpc-tha3_presentation1.

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Silicon based single junction solar cell technology continued to make significant strides in the past year with new world record module efficiencies being reported for the Panasonic heterojunction with thin intrinsic layer (HIT) module (23.8%) and the SunPower rooftop silicon module (24.1%). The HIT cell which is comprised of amorphous silicon (a-Si) and crystalline silicon (c-Si) currently holds the world record efficiency (25.6%) for a silicon based single junction solar cell. Further improvement in this technology requires a rigorous understanding of the underlying physics of the device. The device performance of a-Si and c-Si heterojunction solar cells depends heavily on the nature of transport at the hetero interface and defect assisted transport through the a-Si. Different microscopic processes dominate transport in different regions of the device and take place across widely varying time scales. In this work we present a multiscale model which utilizes different simulation methodologies to study physics in various regions of the device, namely, the Ensemble Monte Carlo (EMC), Kinetic Monte Carlo (KMC), and Drift Diffusion (DD) solvers. The EMC studies the behavior of the photogenerated carriers at the heterointerface; the KMC analyzes transport of the photogenerated carriers through the intrinsic amorphous silicon (i-a-Si) barrier layer; and the DD solver calculates current and other device properties in the low field regions of the cell. These solvers are then self consistently coupled to analyze device performance. Previously, our KMC simulations have shown that hopping is the main mode of transport through the i-a-Si, and the photogenerated carries are collected by defect emission rather that Poole - Frenkel emission or direct tunneling1. In addition, using EMC simulations we have shown that the photogenerated carriers exhibit non Maxwellian behavior at the heterointerface2. This work specifically describes the self-consistent coupling of the DD and EMC solvers. By adding the EMC solver to the multiscale solver we are able to capture the high field behavior of the photogenerated carriers, and its affect on device parameters such as JSC, VOC, FF and efficiency.

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12

Kumar, Sachin, Kumari Sarita, Akanksha Singh S. Vardhan, Rajvikram Madurai Elavarasan, R. K. Saket, and Narottam Das. "Reliability Assessment of Wind-Solar PV Integrated Distribution System Using Electrical Loss Minimization Technique." Energies 13, no. 21 (October 28, 2020): 5631. http://dx.doi.org/10.3390/en13215631.

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This article presents the Reliability Assessment (RA) of renewable energy interfaced Electrical Distribution System (EDS) considering the electrical loss minimization (ELM). ELM aims at minimizing the detrimental effect of real power and reactive power losses in the EDS. Some techniques, including integration of Renewable Energy Source (RES), network reconfiguration, and expansion planning, have been suggested in the literature for achieving ELM. The optimal RES integration (also referred to as Distributed Generation (DG)) is one of the globally accepted techniques to achieve minimization of electrical losses. Therefore, first, the locations to accommodate these DGs are obtained by implementing two indexes, namely Index-1 for single DG and Index-2 for multiple DGs. Second, a Constriction Factor-based Particle Swarm Optimization (CF-PSO) technique is applied to obtain an optimal sizing(s) of the DGs for achieving the ELM. Third, the RA of the EDS is performed using the optimal location(s) and sizing(s) of the RESs (i.e., Solar photovoltaic (SPV) and Wind Turbine Generator (WTG)). Moreover, a Battery Storage System (BSS) is also incorporated optimally with the RESs to further achieve the ELM and to improve the system’s reliability. The result analysis is performed by considering the power output rating of WTG-GE’s V162-5.6MW (IECS), SPV-Sunpower’s SPR-P5-545-UPP, and BSS-Freqcon’s BESS-3000 (i.e., Battery Energy Storage System 3000), which are provided by the corresponding manufacturers. According to the outcomes of the study, the results are found to be coherent with those obtained using other techniques that are available in the literature. These results are considered for the RA of the EDS. RA is further analyzed considering the uncertainties in reliability data of WTG and SPV, including the failure rate and the repair time. The RA of optimally placed DGs is performed by considering the electrical loss minimization. It is inferred that the reliability of the EDS improves by contemplating suitable reliability data of optimally integrated DGs.

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13

"Sunpower introduces PV modules." Refocus 5, no. 4 (July 2004): 13. http://dx.doi.org/10.1016/s1471-0846(04)00170-2.

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14

"SunPower acquires SolarBridge Technologies Inc." Renewable Energy Focus 15, no. 6 (November 2014): 11. http://dx.doi.org/10.1016/s1755-0084(14)70135-8.

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15

"Putting the squeeze on SunPower - interview." Power Engineer 18, no. 1 (2004): 12. http://dx.doi.org/10.1049/pe:20040118.

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16

"SunPower eyes manufacturing plant in South Africa." Renewable Energy Focus 15, no. 6 (November 2014): 8. http://dx.doi.org/10.1016/s1755-0084(14)70130-9.

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17

"Xcel Energy, SunPower partner up for Colorado solar power plant." Renewable Energy Focus 15, no. 3 (May 2014): 6. http://dx.doi.org/10.1016/s1755-0084(14)70056-0.

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18

Nashih, Samuel K., Carlos A. F. Fernandes, João Paulo N. Torres, João Gomes, and P. J. Costa Branco. "Validation of a Simulation Model for Analysis of Shading Effects on Photovoltaic Panels." Journal of Solar Energy Engineering 138, no. 4 (June 14, 2016). http://dx.doi.org/10.1115/1.4033646.

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Numerical simulation results and modeling on the electrical features of concentrating photovoltaic-thermal (PVT) using the free circuit simulation package from linear technology corporation (LTSPICE) are presented. The effects of partial shading of cell strings and temperature are analyzed, showing very good agreement with the results obtained experimentally in lab, at Lisbon University, and under outdoor testing using similar receivers, at the SME Solarus Sunpower AB, a Swedish company whose mission is the development, production, and marketing of concentrated solar technology to the world market. The potential of the used methodology for the design of the solar cell configuration is emphasized as an important tool to optimize PV and PVT performances in the energy conversion process.

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19

Gumport, M. A. "Sunstruck: Accounting for Corporate Stock Loan Agreement Costs - Energy Conversion Devices and SunPower Cases (Addendum to Evergreen Solar Study)." SSRN Electronic Journal, 2009. http://dx.doi.org/10.2139/ssrn.1367373.

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20

fulchand Shahu, Abhishek, and Samish Fale. "APPLICATION OF THERMAL ENERGY STORAGE SYSTEM FOR SOLAR DRIER AND AIR CONDITIONING USED FOR RURAL AND URBAN DEVELOPMENT." International Journal of Engineering Applied Sciences and Technology 5, no. 9 (January 1, 2021). http://dx.doi.org/10.33564/ijeast.2021.v05i09.044.

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Building up a proficient and financially savvy sun-powered dryer for consistent drying of horticultural food items at the consistent state and moderate temperature (35–70 0C) has gotten conceivably a practical substitute for petroleum product in a significant part of the creating scene. Sun-based energy stockpiling can decrease the time between energy supply and energy interest, subsequently assuming an indispensable part in energy preservation. The country and metropolitan populaces, depend chiefly, on nonbusiness energize to meet their energy needs. Sunbased drying is one potential arrangement yet its acknowledgment has been restricted mostly because of certain obstructions. A lot of trial work in the course of the most recent couple of many years has just shown that rural items can be agreeably dried out utilizing sun-based energy. Different plans of limited scope sunlight-based dryers having nuclear power stockpiling have been created in the new past, mostly for drying agrarian food items. Thusly, in this paper, an endeavor has been taken, to sum up, the past and momentum research in the field of nuclear power stockpiling innovation in materials as reasonable and dormant warmth in sunlight-based dryers for drying agrarian food items. With the capacity unit, rural food materials can be dried in the late night, while late-night drying was unrealistic with an ordinary sun-based dryer. So that, a sunpowered dryer with a capacity unit is valuable for people and just as for energy preservation. As of late, analysts considered the warmth move upgrade of the thermal energy stockpiling with PCMs because most stage change materials have low warm conductivity, which causes quite a while for the charging and releasing interaction. Normally, the plan of idle warmth nuclear power stockpiling will lessen the expense and the volume of cooling frameworks and organizations.

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Journal articles on the topic 'Sunpower'

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