|
Solar Bus
A solar bus or solar-charged bus is a bus that is powered exclusively or mainly by solar energy. Solar-powered bus service is referred to as a solar bus service. The use of the term "solar bus" normally implies that solar energy is used not only for powering electric equipment on the bus, but also for the propulsion of the vehicle. Existing solar buses are battery-electric buses or (in the case of hybrid solar buses) hybrid buses equipped with batteries that are recharged from solar (or other) power sources; a launch of solar bus service often goes hand in hand with investments for large-scale installations of stationary solar panels with photovoltaic cells. Similarly, like other solar vehicles, many solar buses have photovoltaic cells contained in solar panels on the vehicle's roof which converts the sun's energy directly into electric energy to be used by the engine. The introduction of solar buses and other green vehicles for purposes of public transport forms a part of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hybrid Engine
A hybrid vehicle is one that uses two or more distinct types of power, such as submarines that use diesel when surfaced and batteries when submerged. Other means to store energy include pressurized fluid in hydraulic hybrids. The basic principle with hybrid vehicles is that the different motors work better at different speeds; the electric motor is more efficient at producing torque, or turning power, and the combustion engine is better for maintaining high speed than a typical electric motor. Switching from one to the other at the proper time while speeding up yields a win-win in terms of Energy efficiency in transportation, energy efficiency, such that it translates into greater fuel efficiency. Vehicle types Two-wheeled and cycle-type vehicles Mopeds, Motorized bicycles, electric bicycles, and even electric kick scooters are a simple form of a hybrid, powered by an internal combustion, internal combustion engine or electric motor and the rider's muscles. Early prototype ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Design Specification
A design specification is a detailed document that sets out exactly what a product or a process should present. For example, the design specification could include required dimensions, environmental factors, ergonomic factors, aesthetic factors, maintenance that will be needed, etc. It may also give specific examples of how the design should be executed, helping others work properly (a guideline for what the person should do). Example of a design specification An example design specification is shown below. Columns and information may be adjustable based on the output format (may be a physical product, or software, etc.) See also * Data sheet (Spec sheet) * Design by contract * Software requirements specification * Specification A specification often refers to a set of documented requirements to be satisfied by a material, design, product, or service. A specification is often a type of technical standard. There are different types of technical or engineering specificati . ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Powertrain
A drivetrain (also frequently spelled as drive train or sometimes drive-train) is the group of components that deliver mechanical power from the prime mover to the driven components. In automotive engineering, the drivetrain is the components of a motor vehicle that deliver power to the drive wheels. This excludes the engine or motor that generates the power. In marine applications, the drive shaft will drive a propeller, thruster, or waterjet rather than a drive axle, while the actual engine might be similar to an automotive engine. Other machinery, equipment and vehicles may also use a drivetrain to deliver power from the engine(s) to the driven components. In contrast, the powertrain is considered to include both the engine and/or motor(s) as well as the drivetrain. Function The function of the drivetrain is to couple the engine that produces the power to the driving wheels that use this mechanical power to rotate the axle. This connection involves physically linking the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perchtoldsdorf
Perchtoldsdorf (; colloquially ''Petersdorf'') is a market town in the Mödling District, in the Austrian state of Lower Austria. It is known chiefly for its winemaking. Geography It is located immediately at the Vienna city limits, south of the Liesing borough and about southwest of the city centre. The western parts of the municipal area border on the Vienna Woods mountain range. With a population of 14,614 (), Perchtoldsdorf is the district's second largest municipality, after the administrative seat Mödling. It is served by the Vienna S-Bahn network and can also be reached by bus and tramway lines run by the Wiener Linien public transport company. History The area formed a coast region of the Paratethys sea during the miocene epoch, documented by numerous fossilizations of marine creatures. Neolithic circular enclosures suggest the assumption that the plain was continuously settled from about 6000 BC onwards. Perchtoldsdorf Castle probably was laid out before 1000 AD ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Virginia University
West Virginia University (WVU) is a public land-grant research university with its main campus in Morgantown, West Virginia. Its other campuses are those of the West Virginia University Institute of Technology in Beckley, Potomac State College of West Virginia University in Keyser, and clinical campuses for the university's medical and school at Charleston Area Medical Center in Charleston and thEastern Divisionat the WVU Medicine Berkeley and Jefferson Medical Centers. WVU Extension Service provides outreach with offices in all 55 West Virginia counties. Enrollment for the Fall 2021 semester was 25,474 for the main campus, while enrollment across all three non-clinical campuses was 28,267. The Morgantown campus offers more than 350 bachelor's, master's, doctoral, and professional degree programs throughout 13 colleges and schools, including that states' only law andental schools The university has produced 25 Truman Scholars, 47 Goldwater Scholars, 88 Gilman Scholars, 7 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lithium-ion Battery
A lithium-ion or Li-ion battery is a type of rechargeable battery which uses the reversible reduction of lithium ions to store energy. It is the predominant battery type used in portable consumer electronics and electric vehicles. It also sees significant use for grid-scale energy storage and military and aerospace applications. Compared to other rechargeable battery technologies, Li-ion batteries have high energy densities, low self-discharge, and no memory effect (although a small memory effect reported in LFP cells has been traced to poorly made cells). Chemistry, performance, cost and safety characteristics vary across types of lithium-ion batteries. Most commercial Li-ion cells use intercalation compounds as the active materials. The anode or negative electrode is usually graphite, although silicon-carbon is also being increasingly used. Cells can be manufactured to prioritize either energy or power density. Handheld electronics mostly use lithium polymer batter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Qiqihar
Qiqihar () is the second-largest city in the Heilongjiang province of China, in the west central part of the province. The built-up (or metro) area made up of Longsha, Tiefeng and Jianhua districts had 959,787 inhabitants, while the total population of the prefecture-level city was shrinking to 4,067,489 as of the 2020 census (5,367,003 as of 2010). These are mainly Han Chinese, though the city is also home to thirty-four minorities including Manchus, Daur, and Mongols. Close to Qiqihar are numerous wetlands and the Zhalong Nature Reserve, famous in China for being home to numerous red-crowned cranes. Etymology The Khitan people settled in the region under the Liao dynasty. The word "Qiqi" is a reference to a local river; the word "hari" refers to defense; literally, it means "defense of Qiqi". The name Qiqihar comes from Manchu (cicihar) History Early history Qiqihar is one of the oldest cities in the northeast of China. The region was originally settled by nomadic Da ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and borders fourteen countries by land, the most of any country in the world, tied with Russia. Covering an area of approximately , it is the world's third largest country by total land area. The country consists of 22 provinces, five autonomous regions, four municipalities, and two Special Administrative Regions (Hong Kong and Macau). The national capital is Beijing, and the most populous city and financial center is Shanghai. Modern Chinese trace their origins to a cradle of civilization in the fertile basin of the Yellow River in the North China Plain. The semi-legendary Xia dynasty in the 21st century BCE and the well-attested Shang and Zhou dynasties developed a bureaucratic political system to serve hereditary monarchies, or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Free Public Transport
Free public transport, often called fare-free public transit or zero-fare public transport, refers to public transport funded in full by means other than by collecting fares from passengers. It may be funded by national, regional or local government through taxation, or by commercial sponsorship by businesses. Alternatively, the concept of "free-ness" may take other forms, such as no-fare access via a card which may or may not be paid for in its entirety by the user. On 29 February 2020, Luxembourg became the first country in the world to make all public transport in the country (buses, trams, and trains) free to use. On 1 October 2022, Malta became the second country in the world to make its public transport system free for all residents. Germany is considering making their public transit system fare-free in response to the EU's threatening to fine them for their air pollution levels. As some transit lines intended to operate with fares initially start service, they may ele ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photovoltaics
Photovoltaics (PV) is the conversion of light into electricity using semiconducting materials that exhibit the photovoltaic effect, a phenomenon studied in physics, photochemistry, and electrochemistry. The photovoltaic effect is commercially used for electricity generation and as photosensors. A photovoltaic system employs solar modules, each comprising a number of solar cells, which generate electrical power. PV installations may be ground-mounted, rooftop-mounted, wall-mounted or floating. The mount may be fixed or use a solar tracker to follow the sun across the sky. Photovoltaic technology helps to mitigate climate change because it emits much less carbon dioxide than fossil fuels. Solar PV has specific advantages as an energy source: once installed, its operation generates no pollution and no greenhouse gas emissions, it shows scalability in respect of power needs and silicon has large availability in the Earth's crust, although other materials required in PV sys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Regenerative Brake
Regenerative braking is an energy recovery mechanism that slows down a moving vehicle or object by converting its kinetic energy into a form that can be either used immediately or stored until needed. In this mechanism, the electric traction motor uses the vehicle's momentum to recover energy that would otherwise be lost to the brake discs as heat. This method contrasts with conventional braking systems. In those systems, the excess kinetic energy is converted to unwanted and wasted heat due to friction in the brakes, or with rheostatic brakes, where the energy is recovered by using electric motors as generators but is immediately dissipated as heat in resistors. In addition to improving the overall efficiency of the vehicle, regeneration can significantly extend the life of the braking system as the mechanical parts will not wear out quickly. General principle The most common form of regenerative brake involves an electric motor functioning as an electric generator. In elect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Solar Bus"){kind=spacer}
.jpg "Click for more on -> Hybrid Engine")
