Shanghai Electric

Shanghai Electric (officially Shanghai Electric Group Company Limited) (SEHK: 2727,SSE: 601727) is a multinational power generation and electrical equipment manufacturing company headquartered in Shanghai, China. It has a long history and one of its subsidiaries was established before 1880.

Shanghai Electric is engaged in the design, manufacture and sale of products including power generation equipment, power transmission and distribution equipment, transformers, switchgear, circuit breakers, transport equipment, machine tools, elevators, packaging and print machinery, and environmental protection equipment. It is the world's largest manufacturer of steam turbines.

Shanghai Electric is listed on the Hong Kong Stock Exchange and the Shanghai Stock Exchange.

History

Shanghai Electric has a long history and one of its subsidiaries was established before 1880. Through R&D innovations and management capability enhancement, Shanghai Electric has achieved a number of breakthroughs since 1949, including the first 6,000 kW fossil-fueled power generating unit, the first cooling gas turbine generator in the world, the first ten-thousand water pressing machine in China, the first 300 MW nuclear power generating unit in China, the first large ship-use crankshaft in China, and the first 1,000 MW ultra super-critical fossil-fueled power generating units in China.

Shanghai

Shanghai is the largest Chinese city by population and the largest city proper by population in the world. It is one of the four direct-controlled municipalities of China, with a population of more than 24 million as of 2014. It is a global financial center, and a transport hub with the world's busiest container port. Located in the Yangtze River Delta in East China, Shanghai sits on the south edge of the mouth of the Yangtze in the middle portion of the Chinese coast. The municipality borders the provinces of Jiangsu and Zhejiang to the north, south and west, and is bounded to the east by the East China Sea.

For centuries a major administrative, shipping, and trading town, Shanghai grew in importance in the 19th century due to European recognition of its favorable port location and economic potential. The city was one of five forced open to foreign trade following the British victory over China in the First Opium War while the subsequent 1842 Treaty of Nanking and 1844 Treaty of Whampoa allowed the establishment of the Shanghai International Settlement and the French Concession. The city then flourished as a center of commerce between east and west, and became the undisputed financial hub of the Asia Pacific in the 1930s. However, with the Communist Party takeover of the mainland in 1949, trade was reoriented to focus on socialist countries, and the city's global influence declined. In the 1990s, the economic reforms introduced by Deng Xiaoping resulted in an intense re-development of the city, aiding the return of finance and foreign investment to the city.

World's fair

A world's fair, world fair, world exposition, or universal exposition (sometimes expo or Expo for short) is a large public exhibition. These exhibitions vary in character and are held in varying parts of the world. The next world's fair is Expo 2017 and is to be held in Astana, Kazakhstan.

Since the 1928 Convention Relating to International Exhibitions came into force, the Bureau International des Expositions (BIE; English: International Exhibitions Bureau) has served as an international sanctioning body for world's fairs. BIE-approved fairs are of three types: universal, international, and specialized. They usually last from three weeks to six months.

History

World's fairs originated in the French tradition of national exhibitions, a tradition that culminated with the French Industrial Exposition of 1844 held in Paris. This fair was followed by other national exhibitions in continental Europe and the United Kingdom.

The best-known 'first World Expo' was held in The Crystal Palace in Hyde Park, London, United Kingdom, in 1851, under the title "Great Exhibition of the Works of Industry of All Nations". The Great Exhibition, as it is often called, was an idea of Prince Albert, Queen Victoria's husband, and is usually considered to be the first international exhibition of manufactured products. It influenced the development of several aspects of society, including art-and-design education, international trade and relations, and tourism. These events have resulted in a remarkable form of Prince Albert's life history, one that continues to be reflected in London architecture in a number of ways, including in the Albert Memorial later erected to the Prince. This expo was the most obvious precedent for the many international exhibitions, later called world's fairs, that have continued to be held to the present time.

Electric power

Electric power is the rate at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second.

Electric power is usually produced by electric generators, but can also be supplied by sources such as electric batteries. It is generally supplied to businesses and homes by the electric power industry through an electric power grid. Electric power is usually sold by the kilowatt hour (3.6 MJ) which is the product of power in kilowatts multiplied by running time in hours. Electric utilities measure power using an electricity meter, which keeps a running total of the electric energy delivered to a customer.

Electrical power provides a low entropy form of energy and can be converted into motion or other forms of energy with high efficiency.

Definition

Electric power, like mechanical power, is the rate of doing work, measured in watts, and represented by the letter P. The term wattage is used colloquially to mean "electric power in watts." The electric power in watts produced by an electric current I consisting of a charge of Q coulombs every t seconds passing through an electric potential (voltage) difference of V is

Electricity

Electricity is the set of physical phenomena associated with the presence and flow of electric charge. Electricity gives a wide variety of well-known effects, such as lightning, static electricity, electromagnetic induction and electric current. In addition, electricity permits the creation and reception of electromagnetic radiation such as radio waves.

In electricity, charges produce electromagnetic fields which act on other charges. Electricity occurs due to several types of physics: