אנרגיה nrg - רק בגלל הרוח. רותי רוסו, המגזין | 15/6/2006 10:27 על גג פח לוהט, באזור התעשייה של ראשון לציון, ניצבת מעין אנטנה מסתובבת לפותה בחבלים לבסיסה.
במבט ראשון היא נראית כמו אלתור יצירתי לקליטת שידורי המונדיאל, אבל ההסבר שמציג האיש שבנה אותה, ד"ר סרגיי רוזנברג, מבהיר כי ייתכן שמדובר כאן ביצירה בעלת פוטנציאל מזומנים עולמי, שאולי תשנה את שוק האנרגיה כפי שאנו מכירים אותו. האנטנה היא למעשה טורבינת רוח לייצור חשמל עצמי. נכון להיום ההספק שלה מגיע לחמישה קילוואט בשעה (קוט"ש), שזה יותר מצריכה ממוצעת של וילה מצוידת היטב ומאוכלסת באנשים פזרנים במיוחד. רק לשם המחשה, צריכה של חמישה קוט"ש תביא לחשבון חשמל של כמעט 1,500 שקל בחודש. הטורבינה שייצר רוזנברג, איש בעל אוריינטציה סביבתית עמוקה, נועדה לענות על דרישות מחמירות של ייצור אנרגיה מתחדשת - יוזמה שעדיין איננה מלוטשת וגמורה באופן סופי.
אם הם אכן צודקים, ייתכן שבשיבושים הבאים של מונופול החשמל הישראלי, במקום לשבת בלי מזגן ועם מחשב שקרס בחושך, נוכל לצחוק ולהעביר ערוצים בטלוויזיה במקביל. טורבינות רוח קלאסיות, לא מתאימות לשימוש עירוני. נפט מפסולת "ישראל נותרה מאחור" China's Future MEGAPROJECTS: Part 6. World’s First Airborne Wind Turbine to Bring Renewable Energy and WiFi to Alaska.
Wind turbines have become airborne!
An enormous helium-filled wind turbine will soon float over the city of Fairbanks, Alaska to produce enough electricity for more than a dozen families living off the grid. Designed and built by MIT startup Altaeros Energies, the turbine known as BAT-Buoyant Airborne Turbine will hover at an altitude of 1,000 feet for 18 months, catching air currents that are five to eight times more powerful than winds on the ground. Large wind farms floating over major cities may seem like something from a sci-fi movie, but the concept of airborne wind turbines is close to becoming reality. Altaeros has already built the world’s highest turbine that can generate twice the energy output of its ground-based counterpart. Besides generating power, these floating power plants can provide data coverage, cell service and local weather data and can be deployed in harsh weather conditions. Hanging Underneath A Bridge Is A Great Place To Put Wind Turbines. Viaducts—the technical term for arch-supported bridges—are already impressive swoops of engineering prowess.
But this kind of infrastructure is about to get even more amazing, as giant spinning turbines are hung from the spans. The Juncal Viaduct in the Canary Islands is serving as a model for the project, completed by researchers from Kingston University in London. The scientists' calculations show that installing turbines between its tall legs would produce enough power for 450 to 500 homes, or around half a megawatt.
"This kind of installation would avoid the emission of 140 tons of CO2 per year, an amount that represents the depuration effect of about 7,200 trees," Oscar Soto, a researcher on the project, told the Spanish-language SINC. Soto's team determined that multiple small turbines work better than a single large unit in these cases, although of course their size is determined by the design of the host viaduct. Invelox wind turbine claims 600% advantage in energy output - Images. Solar Wind Energy's Downdraft Tower generates its own wind all year round. When we think of wind power, we generally think of huge wind turbines sitting high atop towers where they can take advantage of the higher wind speeds.
But Maryland-based Solar Wind Energy, Inc. is looking to turn wind power on its head with the Solar Wind Downdraft Tower, which places turbines at the base of a tower and generates its own wind to turn them. Described by the company as the first hybrid solar-wind renewable energy technology in the renewable energy market, the tower at the center of the system generates a downdraft that drives the wind turbines positioned around its base. This is done by using a series of pumps to carry water to the top of a tower standing up to 2,250 ft (685 m) tall, where it is cast across the opening as a fine mist.
The mist then evaporates and is absorbed by hot, dry air, thereby cooling the air and making it denser and heavier than the warmer air outside the tower. The video below explains how the Downdraft Tower works. WIND TURBINES.pdf. צור קשר. How Do Wind Turbines Work? Click on the image to explore how wind turbines work.
Advantages and Challenges of Wind Energy. Wind energy offers many advantages, which explains why it's one of the fastest-growing energy sources in the world.
Research efforts are aimed at addressing the challenges to greater use of wind energy. Read on to learn more about the benefits of wind power and some of the challenges it is working to overcome. It's a clean fuel source. Startup Offering Wind Turbines That Look Like a Tree and Sound Like One Too - Business - Israel News - Haaretz Israeli News Source.
Wind turbines have been touted as one possible answer to global warming, but they're terrible for birds and bats, they're noisy, and they're an eyesore.
Now, a French startup is announcing the Wind Tree, a small, silent version that it says is ideal for cities. Traditional wind turbines are not silent: a paper from 2008, "Sustainable Energy Choices for a Nation," cites that wind energy "will undoubtedly create noise, which increases stress, which in turn increases the risk of cardiovascular disease and cancer. " Not that any human deaths from wind turbine annoyance have been reported yet. "The main advantage of our technology is that it works with a very small input of energy and turbulent energy," says NewWind founder Jerome Michaud-Lariviere. Possible Dual Rotor Technology for Wind Turbines. Iowa State Aerospace Engineers Anupam Sharma and Hui Hu are exploring the possibility of adding a smaller, secondary rotor to wind turbines.
The engineers studied the base of existing turbines and found two major problems. First, they are big round structural pieces that don’t harvest any wind energy because they are not shaped like an airfoil. Second, the large base of the blades actually disrupt the wind, causing a wake behind them which reduces the energy harvesting capacity of any downwind turbines. Hu says that a turbine in the slipstream of another “can lose 8 to 40 percent of its energy production, depending on conditions.” Their solution? יצור חשמל מאנרגית רוח. טורבינות רוח קטנות. אפקון אחזקות.
מפה נקודות יתרון. על זה אני רוצה לדבר איתך. גודל יחסית לניצול. הסדר. 1012431.77417395. טורבינות רוח.