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飞轮储能:一个更绿色, 90 %高效电池

2018-4-22 10:08| 发布者: dymodel| 查看: 131| 评论: 0|原作者: oath

摘要: 我们一直在等化学品储存系统为重点最近,我们忘记其他一些老的,似乎更有效率,机械电池。这种电池的飞轮。几个成功的试验已经进行了近50年来,和飞轮的应用范围从UPS的作用是为医院把整个列车的运动,然后到巡航速 ...

我们一直在等化学品储存系统为重点最近,我们忘记其他一些老的,似乎更有效率,机械电池。这种电池的飞轮。几个成功的试验已经进行了近50年来,和飞轮的应用范围从UPS的作用是为医院把整个列车的运动,然后到巡航速度,只有它的力量。
如何飞轮的工作?你有没有修复您的自行车,虽然它坐在倒置,纺丝的踏板,使车轮转得高?如果你这样做,你可能已经注意到,试图阻止车轮,你会对它的力量。这是什么意思?有在轮子,通过摩擦能量损失本身(以及可能的旋转运动储存能量,热) 。
聪明的家伙想用这从一个飞轮转动能量,利用它做些有用的事情。这是古老的技术,不过,这已经写入世纪前约。
因此,科学家创造钢管,把磁轴承(管的连接到他们通过定子磁场,减少摩擦) ,纺丝和物多达5.0万转。当需要时,他们所用的旋转力,使电力(传统方式) ,并降低其速度提取它的能量。难道这不是现在你的眉毛提高?那么,你可能认为飞轮很快停止,但数字显示,典型的能源容量范围从3千瓦至133千瓦小时,可高达90 %储存效率。
有实验巴士在20世纪50年代建成,被称为“ gyrobuses “ ,并用在Yverdon ,瑞士。另外,原型车已经建立在这个原则。新材料如碳纤维,使之更加实用和有效。事实上,飞轮越强的材料,转速越高,它的能量可以存储。这是唯一的严重限制和飞轮的危险。它可以分解成块如果滚动太快。
飞轮也是时间性能。欧洲经委会本文作者,马克弗林博士,在设计了一个由飞轮系统,可以连续使用近20年的奥斯汀,德克萨斯大学。


“弗林的设计抓住了制动能量,并使用它的下一个葫芦。更重要的是,飞轮储能系统除可降低峰值功率要求,从而节省空闲期间的能量。在中国的现场试验表明,当经营者使用的发电机组为降低功率要求适当增加了飞轮储能系统,燃料消耗下降了38%,氮氧化物和PM的排放量显着减少。
弗林的飞轮电机控制器也是取代关键任务数据中心和医院使用的工业电池。 “工业电池成本更低,比最初飞轮,但是当你在维修因素,不得不支付更多的费用比你需要避免频繁更换电池的飞轮为基础的解决方案可以相当便宜, “弗林说。 “阿VYCON飞轮将持续20年,消除了怎么办200大型有毒铅酸蓄电池存在的问题。 “
医院和数据备份中心,不能停电。为企业的生命和灾难恢复依赖于能源的供应源源不绝。一个典型的停电时间很短,大多数数据中心医院和后备柴油发电机,这意味着额外的工业电池储能永远不会得到充分利用。大多数停电以及在飞轮的能力,但是当故障仍然存在,吸收有害的飞***率异常然后从容地发生器满足紧急电力法规规定的转让发电机组必须能够在10秒内承担的负荷。飞轮也有较高的耐受性快速循环。 “
飞轮给我们周围有一种替代化学电池,并继续的冲动,这个有趣的技术的发展。例如,我可以用一口袋一上台我的笔记本电脑的电池刚刚完成。做这些事情的可能性在移动电动车或其他应用程序的使用,已测试,并已发现它需要采取特别措施,不会干扰汽车的在曲线的稳定性。我会写,在以后的文章。

on Apr.09, 2009

We have been so focused on chemical storage systems lately, that some us forget other old, seemingly more efficient, mechanical batteries. Such a battery is the flywheel. Several successful experiments have been carried out in the last 50 years, and the flywheel’s applications ranged from acting as a UPS for a hospital to putting an entire train to movement and then to cruise speed, only by its power.
How does a flywheel work? Did you ever repair your bike, and while it was sitting upside down, spinned the pedals, so the wheel got to a high rpm? If you did so, you may have observed that by trying to stop the wheel, you exert a force on it. What does that mean? There is energy stored in the rotational movement of the wheel, energy that loses itself through friction (and, possibly, heat).
Smart guys thought of using this rotational energy from a flywheel and make it do something useful. This is ancient technology, though, that it has been written about centuries ago.
So, scientists created steel tubes, put them on magnetic bearings (the tube’s connection to the stator was through a magnetic field, to reduce friction), and spinned the thing to up to 50,000 rpm. When needed, they used that rotational force to make electricity (the classic way), and decrease its speed, by extracting energy from it. Didn’t this raise your eyebrow by now? Well, you may think that flywheel stops quickly, but figures show that typical energy capacities range from 3 kWh to 133 kWh, with a storing efficiency of up to 90%.
There were experimental buses built in the 1950s, called “gyrobuses”, and were used in Yverdon, Switzerland. Also, prototype cars have been built on this principle. New materials, such as carbon fibers, make them more usable and potent. In fact, the stronger the flywheel’s material is, the higher the rotational speed and the energy it can store. That is the only serious limitation and danger of flywheels. It can break into pieces if spun too quickly.
Flywheels are also time-resistant. An ECE reseacher, Dr. Mark Flynn, from the University of Texas at Austin, designed a flywheel system that could last 20 years of continuous usage.


“Flynn’s design captures the braking energy and uses it for the next hoist. More importantly, the addition of a flywheel energy storage system lowers the peak power requirements which saves energy during idle periods. Field tests in China showed that when operators used a genset appropriate for the reduced power requirements and added a flywheel energy storage system, fuel consumption went down by 38%, with significant reductions in NOx and PM emissions. 
Flynn’s flywheel motor controller is also replacing the industrial batteries used by mission-critical data centers and hospitals. “Industrial batteries are less expensive initially than a flywheel, but when you factor in maintenance and having to pay for more charge than you need to avoid frequent battery replacement a flywheel-based solution can be considerable less expensive,” says Flynn. “A VYCON flywheel will last 20 years and eliminates the problem of what to do with 200 large-scale toxic lead-acid batteries.”
Hospitals and data back-up centers cannot afford power outages. Lives and disaster recovery for businesses depend on an uninterrupted flow of energy. A typical power outage is very short and most hospitals and data centers have back-up diesel generators, meaning the extra energy storage of an industrial battery is never fully utilized. Most outages are well within a flywheel’s capability, but when the outage persists, the flywheel absorbs damaging power abnormalities then gracefully transfers to the generator-meeting emergency power regulations that stipulate gensets must be able to assume the load within 10 seconds. Flywheels also have a higher tolerance for rapid cycling.”
Having flywheels around gives us an alternative to chemical batteries, and the impulse to continue development of this interesting technology. For example, I could use a pocket one to power my laptop’s just finishing battery. The possibility of making these things mobile, for usage in electric cars or other applications, has been tested, and it has been discovered that it would need special measures to not interfere with the car’s stability in curves. I’ll write about that in a future article

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