太陽(yáng)能工程ppt課件-資料下載頁(yè)
2024-09-20 18:27本頁(yè)面
【正文】 基板之間封入了電解液，從而形成太陽(yáng)能電池的一個(gè)單元。玻璃基板的厚度為 1mm、單元的厚度為 30μ m。 ? 太陽(yáng)能電池受光照射，色素就會(huì)被光能激起，飛出電子。這個(gè)電子被注入到 TiO2薄膜的傳導(dǎo)帶上，到達(dá)陰極。然后電子再通過(guò)負(fù)載到達(dá)陽(yáng)極，被吸收在電解液的氧化還原對(duì)中。失去了電子的色素通過(guò)從電解液中獲取電子而恢復(fù)原狀。這樣便產(chǎn)生了電能。 Development of Photovoltaics ? Often called solar electricity, photovoltaic is the direct conversion of sunlight to electricity. It is an attractive alternative to conventional sources of electricity for many reasons: it is silent, nonpolluting, and renewable。 It requires no special training to operate。 It is modular and versatile。 With no moving parts, it is extremely reliable and virtually maintenance free。 And, it can be installed almost anywhere. As you will see in this brochure, you can power virtually anything that requires electricity with photovoltaicsthere are few limits to this technology. ? The photoelectric effect was first observed by French scientist Edmond Becquerel in 1839. More than one hundred years went by before researchers at Bell Labs perfected the first modern photovoltaic (PV) cell in 1954. Four years later, PV was used to power a satellite and has provided extremely reliable electric power for space exploration ever since. Development of Photovoltaics ? The 1960s brought the first terrestrial applications for PV. At that time, the technology was extremely expensive, with PV collectors (called modules) costing upwards of $1,000 a peak watt (Wp). Yet, PV was still desirable in places where no other form of power production was feasible. Over the last three decades, steady advances in technology and manufacturing have brought the price of modules down nearly 200 fold, to $5 $6 per peak watt. Development of Photovoltaics ? As a result of this price drop, PV applications are multiplying rapidly. Today, in fact, PV is costeffective even when other forms of electricity are available. Experts predict that, within the next 510 years, PV should bee petitive with utilitygrid power for widespread distributed applications. Development of Photovoltaics Typical Applications for Photovoltaics Today ? Lighting and security ? Water pumping and irrigation ? Communications ? Remote monitoring equipment ? Aids to navigation Typical Applications for Photovoltaics Today ? Remote refrigeration ? Village power ? Electricity for individual buildings or entire munities ? Supplementing the utility grid for distribution support
黨政相關(guān)相關(guān)推薦
鄂ICP備17016276號(hào)-1