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Brand: Fox
Price: $70.73
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rei.vision - REI Smart Solar Tracker
8 hours ago
- 01. 01. Understandinga problem Project genesis Current European market of second-hand photovoltaic panels, urged us to search for a reason why still operational 10-year old photovoltaic panels with a nominal power of 250 W, are flooding the eastern market, where they eventually end up in landfills. How to find a way for their further usage. Burning landfills motivate us to develop solutions, which will reduce the required space for PV installation and decrease the extent of early destruction of older panels, which still possess an actual efficiency on a level of 80% of their nominal power. Geographic latitude of the most countries with a fast developing PV market, causes that the photovoltaic installations of a stand-still (fixed) type, are still able to obtain a reasonable productivity, on average for 3-4 hours during the daytime. Results of the research carried out in Africa and India, show that even there (where the solar radiation is highly intensive) the actual efficiency of panels is poor. Most of us do not even notice that the sun in the tropical zone, changes its azimuth from the north in June for the south in December, what causes that stand-still installations have to be manually adjusted 2 times a year, or they have to be positioned flat, what in consequence results in decrease of efficiency and overheating. Movement of the earth should not be the only indicator for an algorithm governing the system. Rainy season, sandstorms, pollination or high humidity are factors which influence the efficiency and safety of PV panels. This is why we implemented appropriate functions into our tracking algorithms. Results confirm our originally assumed thesis: Because Regardless of the producers’ declarations, a PV panel is designed to be used for about 10 years at most, from the date of its installation. And Structure of a panel requires further expense of energy in the utilization process. Then On average, a PV panel in its life cycle, is not able to produce a high enough amount of energy, that is consumed in the production process, logistics, repair and maintenance services.
- 02. 02. Ouridea Aim of the project Reduction of a number of panels by 30% what in consequence translates into decrease of the size of an average installation, at the same time preserving power of a certain PV panel set. Reduction of work load of recycling centres means another 30% less energy used for remelting and electrolysis processes, necessary to separate materials that a panel is composed of. Starting low-budget production which currently does not have a solid structure in the country. A great challenge – that is why we aim at finding domestic partners and inspiring them with an idea of independence Countries plagued with war are perfect victims for the distributors of outdated energy technologies. Our systems are designed to function in markets with a very low technical level. Installation or maintenance and repair processes may be carried out by one person.
- 03. 03. How does thePV technology work Limitations and capabilities The sun radiates energy, which particles – photons - fall onto a silicon board which composes a photovoltaic cell. Unit of light is absorbed by silicon and knocks the photon out of its position, therefore causing its motion. This motion is nothing else than a flow of electric current. The power of panels is measured in laboratory conditions in order to maintain a high level of irradiation. This is the way of obtaining data, which serve as a basis, on which potential investors make their decisions. If we have a look at the graph which presents the distribution of irradiance in relation to the angle of falling sunrays, we may discover that efficiency of our installation will significantly differ from assumptions presented in marketing materials. The working temperature of photovoltaic panels is the most commonly ignored parameter. We intuitively assume that summer is a perfect season for production of energy with usage of PV. However, placing panels in a way which makes it impossible to cool them down, drastically decreases their efficiency. Laboratory measurements are carried out at 12 Celsius degree temperature of panels. A panel installed on a dark roof reaches the temperature which is equal to even 60 Celsius degrees. The graph below illustrates how the efficiency of PV panels drops down in dependence on the temperature. The graph below presents power, which we were able to obtain at a geographic latitude of 52 degrees N, with panels of a nominal power of 250W, installed in an urban agglomeration, with a fixed direction – south, at a 35 degree tilt angle. Maximum obtained power was equal to 187W, which is 63W lower than expected one, especially considering the fact that the panel in the manufacturer’s specification indicated an increased efficiency (+5W). Of course the nominal values are in accordance with the truth and they probably may be successfully used for comparison of parameters of competitive products. The test aims at demonstrating that they cannot be used for ROI calculation.
- 04. 04. Oursolution SMART SOLAR TRACKER a modular rack with dedicated electronics and a set of position sensors used to actively track solar irradiation. The presented graph compares the efficiency of our Solar Tracker with a stand-still structure, over one sunny day of the first days of the September 2018 (geographic latitude – 52 degrees N). September is a good example of a month, in which the differences of obtained power values between sets is contained within the average results over whole year. We did not choose the most energy-intensive day because the stand-still system (fixed system) was installed on a dark roof – the efficiency of the panels was dropping down immensely. In the chosen day, the temperature of both solar panel sets was comparable and was equal to about 35 Celsius degrees Following the sun position enabled to maintain the production at a constant level – for about 9h. We have to bear in mind, that as consumers, we are not interested in a maximal momentary power expressed in kW. Take a look at the bill – it is based on kWh. Therefore, it is power consumption per time unit. That is why maintaining the power of a system over a possibly longest period produces the real efficiency. Stand-still, 4kW system which is capable of obtaining an actual momentary power at a level of about 3kW, over 4h, is can produce about 12 kWh over a whole day. Solar Tracker will follow the sun and will extend the time of maintaining actual power, on average by 40%, enabling to produce energy equal to about 17 kWh. Solar trackervs stand-still Yearly cycle As we mentioned before the power of PV panels is highly dependent on working temperature. The racks possess a following advantage – the circulation of air is generally unhindered – the only problem is heating of the ground and retention of air in places covered by landforms. However, most of the household installations are fixed on roof surfaces, where the tilt angle of panels is usually not corrected and in line with a tilt angle of the roof, therefore not in an optimal position towards the sun. Such limitations cause significant decreases in efficiency of a system. Inverter fuses and cabling must be designed with a corresponding total PV rated power which results in unjustified investment cost increase . The graph above presents efficiencies of the roof system and the Solar Tracker, obtained for every day over the whole year. Installing panels directly on a dark roofing surface limits possibilities of photovoltaic panel cooling. By comparing days from the beginning of the year or the ending of the year to the summer season, we observe the increase of efficiency only for the certain part of the year. It turns out that the best efficiency time periods for stand-still roof installations are the spring and the autumn. This result is reflected by the fact, that together with the increase of irradiance, the working temperature of panels also increases. In addition, the PV panel is tilted at a fixed, averaged angle, which is not appropriate for the time period when the insolation is at its maximum values.
- 05. 05.
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REI: A Life Outdoors is a Life Well Lived REI Co-op
9 hours ago Visit REI Co-op online and in-store. From backpacking to cycling to staying in shape and more, outfit your outdoor activities with the latest gear, clothing, …
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REI Co-op World Elite Mastercard® Home
3 hours ago Use your card for good. Connecting people to the outdoors is an important feature of your REI Co-op World Elite Mastercard. When you make a purchase with your card, REI proudly donates to the REI Cooperative Action Fund, a community-funded public charity that directly supports organizations promoting justice, equity and belonging in the outdoors to strengthen the health …
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About Us REI Co-op
3 hours ago We’ve been your outdoor co-op for 82 years. REI was founded in 1938 when a group of 23 climbing friends, united by their love for the outdoors, decided to source quality and affordable gear for their adventures. Read about how it all started. Today the REI community has 20 million lifetime members, nearly 15,000 employees and 168 locations in ...
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REISift
9 hours ago REISift
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REI Mission Statement 2021 REI Mission & Vision Analysis
12 hours ago
Recreation Equipment, Inc. or as it is popularly known, REI is one of the few consumer co-ops companies in the U.S. The firm specializes in retailing of outdoor apparels and related equipment with a singular purpose of making recreation experiences memorable for its customers. Launched in 1938, this company has earned itself a reputation in the American market as a reliable supplier of the best products and services, something that it has perfected due to its mis…
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Breg Vision - Inventory Management Software for Orthopedic
3 hours ago Breg Vision Customer Care: 888-290-8481. Breg.com
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Login TransUnion
2 hours ago There are various types of credit scores, and lenders use a variety of different types of credit scores to make lending decisions. The credit score you receive is based on the VantageScore 3.0 model and may not be the credit score model used by your lender.. Subscription price is $24.95 per month (plus tax where applicable).
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Real Vision Videos Explain Finance, Business & The Global
1 hours ago We would like to show you a description here but the site won’t allow us.
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Vision Insurance MetLife
10 hours ago MetLife’s comprehensive vision insurance covers eye conditions, eye diseases, and eye problems, like glaucoma and cataract. Gain access to a wide network of optometrists and ophthalmologists who offer comprehensive vision exams and ways to purchase glasses or contacts in office.
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New York DMV Vision Registry Provider Information
9 hours ago Quick Links for Vision Registry ProvidersEnroll Now (Enrollment in the Vision Registry program is for medical professionals only.)Sign inSearch Providers See how to renew your driver licenseProvider Information for the NY State DMV Vision RegistryThe DMV Vision Registry stores vision test results submitted online by enrolled businesses that have been approved by …
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VSP Vision Care Vision Insurance
9 hours ago VSP Member Portal. Loading... ...
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Become a lifetime REI Co-op member REI Co-op
8 hours ago Earn $20 toward your next purchase when you become a lifelong REI Co‑op member. Thru December 31, 2021, make a $50 purchase at REI. Add a $20 lifetime membership to your cart. Bonus card will be added automatically to your order. Terms & conditions.
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REI Systems Named 2021 Contractor of the Year at the
5 hours ago STERLING, Va., Nov. 15, 2021 /PRNewswire/ -- REI Systems won the Contractor of the Year Award in the $75 million–$300 million category at the Greater Washington GovCon Awards. The Greater Washington Government Contractor Awards, co-sponsored by the Northern Virginia Chamber of Commerce and the Professional Services Council (PSC), honors the …
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REI Systems will provide GovGrants® tool for South
3 hours ago REI Systems will provide GovGrants® tool for South Carolina Department of Education. STERLING, Va., Oct. 19, 2021 /PRNewswire/ -- REI Systems is pleased to announce a partnership with the South Carolina Department of Education (SCDE). SCDE oversees K-12 public education in South Carolina, with a mission to provide leadership and support so ...
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REI Systems Wins OCC Recompete to Manage and Migrate
10 hours ago STERLING, Va., Dec. 7, 2021 /PRNewswire/ -- The Office of the Comptroller of the Currency (OCC) awarded REI Systems a 5-year contract valued at $32 million to support the Appian platform and products spanning operations, compliance, and business investment activities. OCC is a bureau of the U.S. Department of the Treasury with a mission to ensure …
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Frequently Asked Questions
What is the vision and mission statement of Rei?
In this case analysis of REI (Recreational Equipment), the vision statement emphasizes on advancing the passion for outdoor adventure and being a renowned ambassador for the same. On the other hand, its mission statement indicates its efforts to educate and facilitate the best outdoor experiences for all its clients.
What is an Rei online account?
An REI Online Account lets you check out quicker, view your order status and history, add product reviews, and more - for the best online experience, attach your REI Membership to your account.
Why join the REI Co-op?
Our members can trade in gently used gear for REI gift cards and feel good about joining the circular economy. Join the forum just for co-op members on REI conversations. Share information, inspiration, jokes and more. Did you know most REI stores have full-on bike and ski shops in-house? And even better: Members get 10% off.
Why should you choose Rei?
Exceeding expectations. REI has come of age considering that it offers much more than expected. Today, the company is one of the leading providers of courses in outdoors activities, consultations in hiking and vacations and many others.