Solar Botanic Tree to Harnessing the Power of the Sun and Wind
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A HISTORY of the SOLAR CELL, in PATENTS Karthik Kumar, Ph.D
A HISTORY OF THE SOLAR CELL, IN PATENTS Karthik Kumar, Ph.D., Finnegan, Henderson, Farabow, Garrett & Dunner, LLP 901 New York Avenue, N.W., Washington, D.C. 20001 [email protected] Member, Artificial Intelligence & Other Emerging Technologies Committee Intellectual Property Owners Association 1501 M St. N.W., Suite 1150, Washington, D.C. 20005 [email protected] Introduction Solar cell technology has seen exponential growth over the last two decades. It has evolved from serving small-scale niche applications to being considered a mainstream energy source. For example, worldwide solar photovoltaic capacity had grown to 512 Gigawatts by the end of 2018 (representing 27% growth from 2017)1. In 1956, solar panels cost roughly $300 per watt. By 1975, that figure had dropped to just over $100 a watt. Today, a solar panel can cost as little as $0.50 a watt. Several countries are edging towards double-digit contribution to their electricity needs from solar technology, a trend that by most accounts is forecast to continue into the foreseeable future. This exponential adoption has been made possible by 180 years of continuing technological innovation in this industry. Aided by patent protection, this centuries-long technological innovation has steadily improved solar energy conversion efficiency while lowering volume production costs. That history is also littered with the names of some of the foremost scientists and engineers to walk this earth. In this article, we review that history, as captured in the patents filed contemporaneously with the technological innovation. 1 Wiki-Solar, Utility-scale solar in 2018: Still growing thanks to Australia and other later entrants, https://wiki-solar.org/library/public/190314_Utility-scale_solar_in_2018.pdf (Mar. -
Development of a Racing Strategy for a Solar Car
DEVELOPMENT OF A RACING STRATEGY FOR A SOLAR CAR A THESIS SUBMITTED TO THE GRADUATE SCHOOL OF NATURAL AND APPLIED SCIENCES OF MIDDLE EAST TECHNICAL UNIVERSITY BY ETHEM ERSÖZ IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE IN MECHANICAL ENGINEERING SEPTEMBER 2006 Approval of the Graduate School of Natural and Applied Sciences Prof. Dr. Canan Özgen Director I certify that this thesis satisfies all the requirements as a thesis for the degree of Master of Science Prof. Dr. Kemal İder Head of Department This is to certify that we have read this thesis and that in our opinion it is fully adequate, in scope and quality, as a thesis for the degree of Master of Science Asst. Prof. Dr. İlker Tarı Supervisor Examining Committee Members Prof. Dr. Y. Samim Ünlüsoy (METU, ME) Asst. Prof. Dr. İlker Tarı (METU, ME) Asst. Prof. Dr. Cüneyt Sert (METU, ME) Asst. Prof. Dr. Derek Baker (METU, ME) Prof. Dr. A. Erman Tekkaya (Atılım Ü., ME) I hereby declare that all information in this document has been obtained and presented in accordance with academic rules and ethical conduct. I also declare that, as required by these rules and conduct, I have fully cited and referenced all material and results that are not original to this work. Name, Last name : Ethem ERSÖZ Signature : iii ABSTRACT DEVELOPMENT OF A RACING STRATEGY FOR A SOLAR CAR Ersöz, Ethem M. S., Department of Mechanical Engineering Supervisor : Asst. Prof. Dr. İlker Tarı December 2006, 93 pages The aerodynamical design of a solar race car is presented together with the racing strategy. -
Recyclability Challenges in ?Abundant? Material-Based
27th European Photovoltaic Solar Energy Conference and Exhibition This is a pre-peer review version of the paper submitted to the journal Progress in Photovoltaics. It has been selected by the Executive Committee of the 27th EU PVSEC for submission to Progress in Photovoltaics. RECYCLABILITY CHALLENGES IN “ABUNDANT” MATERIAL-BASED TECHNOLOGIES a a,b,* Annick Anctil and Fthenakis aPV Environmental Research Center, Brookhaven National Laboratory, Upton, NY bCenter for Life Cycle Analysis, Columbia University, New York, NY *Bldg. 130, Upton, NY 11973, tel. 631-344-2830, Fax. 631-3443957, [email protected] ABSTRACT: Much current research in photovoltaic technology is directed towards using “abundant” base metals like copper and zinc (e.g., CZTS or more recently CZTSSe) to overcome the the challenges of material scarcity posed by the use of tellurium, indium, germanium, and gallium in current generation products (e.g., CdTe, CIGS, a- Si/thin-film Si). The supply of these materials is limited because they are minor byproducts of the production of copper, zinc, lead. and aluminum, so that their economic production inherently is linked to that of the base metals. But, although the base metals currently are abundant, their reserves are not inexhaustible. In addition to concerns on resource availability, the main sustainability metrics for large-scale PV growth are low cost and minimum environmental impact. As the numbers of photovoltaic installations grow, greatly displacing traditional power- generation infrastructures, recycling will play an increasingly important role in managing their end-of-life fate, so relieving pressure on the prices of critical materials. Identifying the potential issues in current technologies can help implement a take-back- or recycling-program ahead of time. -
Annual Report 20 1 0 Sma Solar Technology Ag
ANNUAL REPORT 2010 SMA SOLAR TECHNOLOGY AG THE FUTURE OF SOLAR TECHNOLOGY BUSINESS GROUP FIGURES HIGHLIGHTS 2010 SMA Group 2010 2009 2008 2007 2006 Sales € million 1,920.1 934.3 681.6 327.3 192.9 Export ratio % 44.9 38.4 42.3 29.4 20.1 Inverter output sold MW 7,750 3,381 2,180 950 430 Capital expenditure1 € million 158.3 82.1 63.9 12.3 15.0 Depreciation € million 31.3 16.3 8.9 16.0 9.0 Operating profit (EBIT) € million 516.8 228.4 167.4 59.3 33.4 KEY FIGURES AND HIGHLIGHTS 2010 Operating profit margin % 26.9 24.4 24.6 18.1 17.3 Consolidated net profit € million 365.0 161.1 119.5 36.8 20.5 Earnings per share2 € 10.52 4.64 3.44 1.06 0.59 Employees (average during the period)3 5,519 3,412 2,513 1,600 1,164 MORE THAN 1,500 NEW JOBS CREATED in Germany 5,179 3,236 2,400 1,535 1,133 abroad 340 176 113 65 31 BUSINESS IN FOREIGN MARKETS IS BOOMING SMA Group 12 / 31 / 2010 12 / 31/ 2009 12 / 31/ 2008 12 / 31/ 2007 12 / 31/ 2006 HIGH DIVIDEND AND REPRESENTS APPROX. OF € 3.00 PLANNED Total assets € million 1,251.5 718.6 469.6 163.2 112.3 45 % OF SALES Equity € million 728.4 407.6 280.8 64.4 40.7 Equity ratio % 58.2 56.7 59.8 39.5 36.2 Net working capital4 € million 284.6 98.6 78.0 59.4 34.3 EBIT RECORD Net working capital ratio % 14.8 10.6 11.4 18.1 17.8 OF € 0.5 BILLION Net Cash € million 523.4 344.8 239.4 41.2 20.9 GROUP SALES INCREASE TO ALMOST € 2 BILLION PERFORMANCE OF THE SMA SHARE 2010 percent5 SMA share TecDAX® ÖkoDAX® 110 100 90 80 70 60 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec SMA IS BY FAR THE WORLD TREMENDOUS GROWTH MARKET AND TECHNOLOGY OF THE SOLAR MARKET, BOTH LEADER IN GERMANY AND ABROAD 1 excl. -
The Place of Photovoltaics in Poland's Energy
energies Article The Place of Photovoltaics in Poland’s Energy Mix Renata Gnatowska * and Elzbieta˙ Mory ´n-Kucharczyk Faculty of Mechanical Engineering and Computer Science, Institute of Thermal Machinery, Cz˛estochowaUniversity of Technology, Armii Krajowej 21, 42-200 Cz˛estochowa,Poland; [email protected] * Correspondence: [email protected]; Tel.: +48-343250534 Abstract: The energy strategy and environmental policy in the European Union are climate neutrality, low-carbon gas emissions, and an environmentally friendly economy by fighting global warming and increasing energy production from renewable sources (RES). These sources, which are characterized by high investment costs, require the use of appropriate support mechanisms introduced with suitable regulations. The article presents the current state and perspectives of using renewable energy sources in Poland, especially photovoltaic systems (PV). The specific features of Polish photovoltaics and the economic analysis of investment in a photovoltaic farm with a capacity of 1 MW are presented according to a new act on renewable energy sources. This publication shows the importance of government support that is adequate for the green energy producers. Keywords: renewable energy sources (RES); photovoltaic system (PV); energy mix; green energy 1. State of Photovoltaics Development in the World The global use of renewable energy sources (RES) is steadily increasing, which is due, among other things, to the rapid increase in demand for energy in countries that have so far been less developed [1]. Other reasons include the desire of various countries to Citation: Gnatowska, R.; become self-sufficient in energy, significant local environmental problems, as well as falling Mory´n-Kucharczyk, E. -
Letting in the Light: How Solar Photovoltaics Will Revolutionise The
LETTING IN THE LIGHT HOW SOLAR PHOTOVOLTAICS WILL REVOLUTIONISE THE ELECTRICITY SYSTEM Copyright © IRENA 2016 ISBN 978-92-95111-95-0 (Print), ISBN 978-92-95111-96-7 (PDF) Unless otherwise stated, this publication and material herein are the property of the International Renewable Energy Agency (IRENA) and are subject to copyright by IRENA. Material in this publication may be freely used, shared, copied, reproduced, printed and/or stored, provided that all such material is clearly attributed to IRENA and bears a notation of copyright (© IRENA) with the year of copyright. Material contained in this publication attributed to third parties may be subject to third-party copyright and separate terms of use and restrictions, including restrictions in relation to any commercial use. This publication should be cited as: IRENA (2016), ‘Letting in the Light: How solar PV will revolutionise the electricity system,’ Abu Dhabi. About IRENA The International Renewable Energy Agency (IRENA) is an intergovernmental organisation that supports countries in their transition to a sustainable energy future and serves as the principal platform for international co-operation, a centre of excellence, and a repository of policy, technology, resource and financial knowledge on renewable energy. IRENA promotes the widespread adoption and sustainable use of all forms of renewable energy, including bioenergy, geothermal, hydropower, ocean, solar and wind energy, in the pursuit of sustainable development, energy access, energy security and low-carbon economic growth and prosperity. www.irena.org Acknowledgements IRENA is grateful for the valuable contributions of Mark Turner in the preparation of this study. This report benefited from the reviews and comments of numerous experts, including Morgan Bazilian (World Bank), John Smirnow (Global Solar Council), Tomas Kåberger (Renewable Energy Institute), Paddy Padmanathan (ACWA Power), Linus Mofor (UNECA), DK Khare (Ministry of New and Renewable Energy, India), Maurice Silva (Ministry of Energy, Chile), Eicke Weber (Fraunhofer ISE). -
Optimization of Thin-Film Solar Cells for Lunar Surface Operations
Optimization of Thin-Film Solar Cells for Lunar Surface Operations Shawn Breeding∗ and William E. Johnson† NASA Marshall Space Flight Center, AL, 35812 Thin-film solar cells have been in production for decades, but technology has only recently advanced enough to allow for comparable efficiencies to traditional rigid cells. Some of the benefits of thin-films, such as lighter weight and being foldable, are particularly advantageous to space applications since mass and volume are key considerations of any flight project. Using these thin-film cells in space, however, is outside of their ground-based design criteria. This requires special care to be taken in designing the power generation system of a spacecraft around a thin-film solar cell, particularly in regards to thermal management. Without the diffusion of an atmosphere to mitigate solar load, the temperature of the panels can rapidly exceed their design specification. In this paper a design solution is presented that allows for thin-film solar cells to be used in a robotic lunar lander. Due to the low thermal mass and in-plane conductivity of thin films, it is difficult to remove waste heat by any other method than radiation. On the lunar surface this means angling the arrays to increase their view factor to space, which has the negative consequence of decreasing their power generation. An optimization was developed to balance the heat rejection and power generation of the cells, using constraints on the maximum cell temperature and minimum spacecraft power requirements. The resulting solar panel angle was then used as an input to the Thermal Desktop model to verify the final panel temperatures. -
Maximum Power Point
Photovoltaic Efficiency: Maximum Power Point Fundamentals Article This article presents the concept of electricity through Ohm’s law and the power equation, and how it applies to solar photovoltaic (PV) panels. You’ll learn how to find the maximum power point (MPP) of a PV panel in order to optimize its efficiency at creating solar power. Real-World Applications PV panels are becoming an increasingly common way to generate power around the world for many different power applications. This technology is still expensive when compared to other sources of power so it is important to optimize the efficiency of PV panels. This can be a challenge because as weather conditions change (even cloud cover, see Figure 1), the voltage and current in the circuit changes. Engineers have designed inverters to vary the resistance and continuously find new maximum power point (MPP) in a circuit; this is called maximum power point tracking (MPPT). An inverter can be hooked up to one or many PV panels at a time. It is up to engineers to decide the right balance of cost and efficiency when including inverters in their designs. By understanding the factors that affect electrical circuits and knowing how to control the elements in circuits, engineers are able to design solar power systems that operate as efficiently as possible in different environments with changing weather conditions. Figure 1. Cloud shadow dilemma. Introduction Solar energy technology is an emerging energy field that provides opportunities for talented and bright engineers to make beneficial impacts on the environment while solving intriguing engineering challenges. K-12 However, before attempting to design solar energy power systems, engineers must understand for fundamental electrical laws and equations and how they apply to solar energy applications. -
Thermal Performance of Dwellings with Rooftop PV Panels and PV/Thermal Collectors
energies Article Thermal Performance of Dwellings with Rooftop PV Panels and PV/Thermal Collectors Saad Odeh Senior Program Convenor, Sydney Institute of Business and Technology, Sydney City Campus, Western Sydney University, NSW 2000, Australia; [email protected] or [email protected]; Tel.: +61-2-8236-8075 Received: 22 June 2018; Accepted: 17 July 2018; Published: 19 July 2018 Abstract: To improve the energy efficiency of dwellings, rooftop photovoltaic (PV) technology is proposed in contemporary designs; however, adopting this technology will add a new component to the roof that may affect its thermal balance. This paper studies the effect of roof shading developed by solar PV panels on dwellings’ thermal performance. The analysis in this work is performed by using two types of software packages: “AccuRate Sustainability” for rating the energy efficiency of a residential building design, and “PVSYST” for the solar PV power system design. AccuRate Sustainability is used to calculate the annual heating and cooling load, and PVSYST is used to evaluate the power production from the rooftop PV system. The analysis correlates the electrical energy generated from the PV panels to the change in the heating and cooling load due to roof shading. Different roof orientations, roof inclinations, and roof insulation, as well as PV dwelling floor areas, are considered in this study. The analysis shows that the drop in energy efficiency due to the shaded area of the roof by PV panels is very small compared to the energy generated by these panels. The analysis also shows that, with an increasing number of floors in the dwelling, the effect of shading by PV panels on thermal performance becomes negligible. -
Q2/Q3 2020 Solar Industry Update
Q2/Q3 2020 Solar Industry Update David Feldman Robert Margolis December 8, 2020 NREL/PR-6A20-78625 Executive Summary Global Solar Deployment PV System and Component Pricing • The median estimate of 2020 global PV system deployment projects an • The median residential quote from EnergySage in H1 2020 fell 2.4%, y/y 8% y/y increase to approximately 132 GWDC. to $2.85/W—a slower rate of decline than observed in any previous 12- month period. U.S. PV Deployment • Even with supply-chain disruptions, BNEF reported global mono c-Si • Despite the impact of the pandemic on the overall economy, the United module pricing around $0.20/W and multi c-Si module pricing around States installed 9.0 GWAC (11.1 GWDC) of PV in the first 9 months of $0.17/W. 2020—its largest first 9-month total ever. • In Q2 2020, U.S. mono c-Si module prices fell, dropping to their lowest • At the end of September, there were 67.9 GWAC (87.1 GWDC) of solar PV recorded level, but they were still trading at a 77% premium over global systems in the United States. ASP. • Based on EIA data through September 2020, 49.4 GWAC of new electric Global Manufacturing generating capacity are planned to come online in 2020, 80% of which will be wind and solar; a significant portion is expected to come in Q4. • Despite tariffs, PV modules and cells are being imported into the United States at historically high levels—20.6 GWDC of PV modules and 1.7 • EIA estimates solar will install 17 GWAC in 2020 and 2021, with GWDC of PV cells in the first 9 months of 2020. -
Proceedings of the Fall 2018 ELEC 7830/36 Photovoltaics Class Presentations
Proceedings of the Fall 2018 ELEC 7830/36 Photovoltaics Class Presentations 1) Zabihollah Ahmadi 2) Arthur Bond 3) Carl Bugg 4) Prattay Chowdhury 5) Jeff Craven 6) Kyle Daniels 7) Tanner Grider 8) Donald Hughes 9) Grant Kirby 10) Markus Kreitzer 11) Sanfwon Seo 12) Minseok Song 13) Wendong Wang 14) Shane Williams 15) Yuqiao Zhang 1 Fabrication Methods of Photovoltaic Devices Zabihollah Ahmadi A simple configuration of Solar Cells is a P-N junction, but even for fabrication of this simple configuration there are several experiments that should be done. In other words, fabrication processes involve the steps such as oxidation growth, etching oxides, photolithograph, and metal deposition. As an example, ion implantation is used for making n+ or p+ doping in Si wafer. In general, there are different kind of materials that are used for fabrication of Solar Cells. The most popular materials are Multijunction Cells ( lattice matched, metamorphic, inverted metamorphic, …), Single-Junction GaAs (Single crystal, Concentrator, thin-film crystal), Crystalline Si Cells, Thin films like CIGS and CdTe and Emerging PV (Dye-sensitized cells, Perovskite cells, Organic tandem cells, Inorganic cells, Quantum dot cells.) Recently, some groups used 2D mateirals like Graphene and Transition Metal Dichalcogenides (MoS2) in fabrication of Photovoltaics devices. So, these materials need to be synthesized on substrate using different methods. For example Metal Organic Chemical Vapor Deposition is the best method for deposition of GaAs. This presentation will talk about how these methods work in fabrication of PV. 2 Photovoltaic Sensors Arthur Bond Photovoltaics or PV is the process of converting solar energy into a DC electrical current through the use of semi conductive materials. -
National Survey Report of PV Power Applications in Sweden 2015
National Survey Report of PV Power Applications in Sweden 2015 Prepared by Johan Lindahl Table of contents Table of contents .................................................................................................................. 1 Foreword ............................................................................................................................... 3 Introduction .......................................................................................................................... 4 1 Installation data .................................................................................................................... 5 1.1 Applications for Photovoltaics ................................................................................. 5 1.2 Total photovoltaic power installed .......................................................................... 5 1.2.1 Method ........................................................................................................ 5 1.2.2 The Swedish PV market ............................................................................... 5 1.2.3 Swedish PV market segments ..................................................................... 9 1.2.4 The geographical distribution of PV in Sweden .......................................... 10 1.2.5 PV in the broader Swedish energy market .................................................. 12 2 Competitiveness of PV electricity ......................................................................................... 13 2.1 Module