Météo habituelle à Antananarivo, Madagascar - Weather Spark À Antananarivo, la saison pluvieuse est chaud et couvert et la saison sèche est confortable et dégagé dans l'ensemble. Au cours de l'année, la température varie généralement de 10 °C à 27 °C et est rarement inférieure à 8 °C ou supérieure à 30 °C. Analyse climatique Cliquez sur chaque tableau pour plus d'informations. En fonction du score touristique, les meilleurs moments de l'année pour visiter Antananarivo pour les activités estivales sont de mi avril à mi juin et de mi août à fin octobre. La saison chaude dure 5,9 mois, du 12 octobre au 10 avril, avec une température quotidienne moyenne maximale supérieure à 26 °C. La saison fraîche dure 2,4 mois, du 9 juin au 22 août, avec une température quotidienne moyenne maximale inférieure à 21 °C. Température moyenne maximale et minimale La température moyenne quotidienne maximale (ligne rouge) et minimale (ligne bleue), avec bandes du 25e au 75e percentile et du 10e au 90e percentile. Température horaire moyenne Catégories de couverture nuageuse
This tiny portable wind turbine fits in your bag and charges your gadgets In our current gadget-centric culture, one limiting factor for mobile devices is the capacity of the batteries that power them, and while we haven't seen any massive improvements in battery technology (yet) which would allow us to go for days between charges, mobile solar chargers and battery backup systems seem to be the only solutions (well, other than to actually stop using them so much). Wind turbines are a viable clean energy solution, but most of the innovations in wind energy tend to be on the large scale, and since those devices aren't exactly portable, they don't lend themselves to mobile device charging. But one forthcoming invention may allow us to harness the power of the wind with a micro turbine, in order to charge our smartphones and tablets and other USB devices. The Trinity, which is made from plastic and aluminum and weighs about 4 lb., measures 23" high when operating, and folds down into a 12" long cylinder for transport.
Éolienne Une éolienne est la forme contemporaine du moulin à vent. Il s'agit d'un ensemble de dispositifs qui transforment l'énergie cinétique du vent en énergie mécanique, laquelle est ensuite le plus souvent transformée en énergie électrique. Les éoliennes produisant de l'électricité sont appelées aérogénérateurs, tandis que les éoliennes qui pompent directement de l'eau sont parfois dénommées éoliennes de pompage, dont un type particulier est l'éolienne Bollée. Les termes centrale éolienne, parc éolien ou ferme éolienne sont utilisés pour décrire les unités de production groupées, installées à terre ou en mer. Dans ce dernier cas, on parle d'éolienne en mer ou offshore. Les pays du monde où les champs éoliens sont les plus nombreux sont la Chine, les États-Unis, l'Allemagne, l'Espagne, l'Inde, le Royaume-Uni et, en proportion de la population, le Danemark (voir Production d'énergie éolienne). Étymologie Description, modélisation Schéma d'une éolienne de type aérogénérateur. Un mât Une nacelle est :
Portable Wind Generator As a Cell Phone Charger: 7 Steps (with Pictures) In India, there are lots of people who still prefer trains to travel and spend days together to complete their journey. Most trains usually don't provide electricity even though there are charging sockets available. Even if they do, it is seen that such a charging facility takes a longer time than usual to fully charge the cell phone. Sometimes the passengers can even be seen fighting for charging their cell phones if there are less number of charging sockets available. I've myself witnessed people waiting at every coach's doors to get a chance to charge their phones. Click here to see the proof for a live example! To this problem, a common temporary solution may be a to use a typical PowerBank which doesn't last longer and need to be charged again. The application of this 5 watt wind generator is not just limited to a moving train but is immense as it can easily be used while travelling on any vehicle like bicycles, buses, motorbikes,recreational vehicles..etc.
DIY: How to Make a Wind-Powered Phone Charger - The Green Optimistic For those who have the skill and interest in homemade electronics, and those who know someone who do, read the rest of this post to find out how to make a phone charger that attaches to a bike to use wind power as an energy source. While not so complicated, it does require a few things that are not just lying around most people’s houses. Step 1: A soldering iron, a glue gun, a wire stripper and electrical tape are needed. For materials, you need: a CPU fana toroidal inductor2N2222, 2N3904 or BC547 transistor5v set-up module5 germanium diodesa perfboarda phone batterya small switch Step 2: The fan will create an AC current that needs to be converted to DC in order to charge the phone. Create a diode bridge and connect it to the fan. Step 3: The Joule Thief circuit is used for this since it won’t overload the phone and damage the battery. Step 4: Connect the battery to the 5v set-up module and the circuit. Step 5: Glue all the components to the side of the fan so the unit is compact.
5V Portable Wind Turbine | Detailed Project with Guidelines This project deals with the design and development of a portable wind turbine unit, capable of generating electricity from the kinetic energy in the wind. The circuit requires a DC motor, fan blades or propeller, DC-DC boost converter and wind energy to produce a 5V DC output. Wind-power generation is a fairly simple process that uses an ordinary miniature DC motor to make a very simple wind turbine generator. A miniature DC motor, like RF-300FA-12350, is easily available in the market but can also be taken out from an old CD/DVD drive/player (refer Fig. 1). A small propeller, or fan blades, can be mounted directly onto the motor shaft. Compact and light-weight plastic fan blades/propellers are available. Since a miniature DC motor is used as the rotary engine, only a small amount of DC supply (three to five volts maximum) is available at the output. Circuit and working As shown in Fig. 4, the circuit is built around a DC motor, Schottky diode 1N5817 and DC-DC boost converter module.
Savonius Wind Turbine More of the wind's energy is lost in the conversion to electrical energy. As a result, Savonius wind turbines are not commonly the preferred design for energy production either for commercial use or for home energy generation. Uses For Savonius Wind Turbines The Savonius wind turbine design is used wherever small amounts of power need to be generated by turbines that require little or no maintenance. They are also a good choice for many wind turbine uses other than electricity generation. Many anemometers are based on Savonius wind turbine design, as these instruments measure wind speed and efficiency is of no concern in that application. Manufacturers Savonius wind turbines are manufactured by a number of companies, including Huopeng Industry Co. Building Your Own The blade design for a simple Savonius rotor is an S-curve around an axis in the middle. Advantages Of A Savonius Wind Turbine The Savonius turbine also turns at relatively low speeds and does not stick out very far.
What is a vertical wind turbine? Darrieus vertical axis wind turbine: Basic research methods JavaScript is disabled on your browser. Please enable JavaScript to use all the features on this page. Abstract Horizontal axis wind turbines (HAWTs) are the mainstream of wind power industry in the world; however, as turbines are becoming bigger, the maintenance of equipments grows more complex and costs much higher. Compared with HAWTs, Darrieus vertical axis wind turbines (VAWTs) have more technological advantages, providing an alternative for the wind power technology; hence Darrieus VAWTs are catching more eyes. Nevertheless, the majority of wind turbine design currently focuses on HAWTs, researches on Darrieus VAWTs have lagged significantly behind those on HAWTs, which have greatly hindered the development of VAWTs. Keywords Darrieus VAWT Research methods Aerodynamic theory Experimental methods
Pringles Wind Turbine (Pleech) - Version One: 16 Steps (with Pictures) AdWords We use AdWords to deploy digital advertising on sites supported by AdWords. Ads are based on both AdWords data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that AdWords has collected from you. LiveRamp We use LiveRamp to deploy digital advertising on sites supported by LiveRamp. UpSellIt We use UpSellIt to help create a more streamlined shopping cart experience. Doubleclick We use Doubleclick to deploy digital advertising on sites supported by Doubleclick. RocketFuel We use RocketFuel to deploy digital advertising on sites supported by RocketFuel. Twitter We use Twitter to deploy digital advertising on sites supported by Twitter. Facebook We use Facebook to deploy digital advertising on sites supported by Facebook. Sprinklr Dstllery Marin LinkedIn Demandbase Yandex AdForm Bing
MintyBoost! - Small battery-powered USB charger This project details a small & simple, but very powerful USB charger for your mp3 player, camera, cell phone, and any other gadget you can plug into a USB port to charge! The charger circuitry and 2 AA batteries fit into an Altoids gum tin, and will run your iPod for hours: 2.5x more than you'd get from a 9V USB charger! You can use rechargable batteries too. Some numbers... iPod video (tested, using alkaline batteries): 3hrs more video (1 full recharge) iPod mini (tested w/rechargeables): 25 hours more (1.5 full recharges) iPod shuffle (unverified): 60 hours more (5 full recharges) Weight (with 2xAA): 3.5oz This project is suitable for beginners, some soldering tools are necessary but even if you've never soldered before it should be pretty easy. I've also documented the process of designing this kit, in case other people interested in designing and making kits are interested in learning how to start selling their own kits! This project was developed under support from EYEBEAM, thanks!
Collapsible Wisp will power up all your devices in the wilderness Next time your phone battery dies, give it a boost with your very own wind turbine. A graduate from West Virginia has designed a portable charger that can be powered by the ‘slightest of breezes’ and is designed to fold up and fit in a backpack. Called Wisp, the turbine measures just 14 inches (36cm) when folded and weighs 4lbs (1.8kg) but extends to a staggering 6ft tall (1.8 metres) when deployed. Scroll down for video Renewable: A graduate from West Virginia has designed a portable charger, called Wisp, that can be powered by the ‘slightest of breezes’ and is designed to fold up and fit in a backpack (assembled Wisp pictured) It was created by Justin Chambers while he was a student at West Virginia University and last year it was successfully funded on Kickstarter. Wisp is part of a range of wind turbines from Mr Chamber’s Windpax firm. He has also designed one called Breeze, and another called Cyclone. Wisp is designed to be used for a backup power supply in emergency situations. Loaded: 0%
LE-v50 Vertical Axis Wind Generator The LE-v50 is a compact, silent and lightweight vertical axis turbine designed to trickle charge your batteries or provide power for low power electronic devices such as data-logging or telemetry equipment. The LE-v50 was originally designed to provide power for industrial data monitoring equipment in the most extreme & remote places on the planet. Since then, the LEv-50 has become a regular sight at marinas and caravan parks providing a trickle charge to valuable batteries whilst the vehicle owners are away. This saves owners money by not having to connect to ‘shore power’ or repair and replace expensive batteries that have been damaged by becoming discharged. In the yachting world, the LEv-50 also reduces the effects of mains induced electrolysis and corrosion on the boat as well as meaning that owners can go on extended cruises without need to run the engine. The LE-v50 is available in 12V, 24V and 48V versions. Indestructible build quality & durability Pure performance Absolute Safety