Great Engineering Achievements of the 20th Century

Engineering was the greatest success in the now closed century. Widespread development and distribution of electricity and water purification, automobile and aircraft, radio and television, spacecraft and laser, antibiotics and medical imaging, computers and the Internet are just a few of the highlights of the engineering revolution and improvement centuries. Aspects of life

However, some achievements, including phones and cars that were not invented in the 20th century, were included because their effect did not actually appear until the 20th century. The most important accomplishment electrification is essential to almost every part of modern society, and literally illuminates the world and affects myriad areas of daily life including food production and processing, air conditioning and heating I will. "Refrigeration, entertainment, transportation, communications, health care and computers" By the end of 2003, the National Engineering Academy announced "Innovation Century: Changing 20 Engineering Outcomes in Our Lives".

Electrification was called "the most important engineering achievement of the 20th century" by the National Academy of Engineering. Factory electric lighting has greatly improved labor conditions, eliminated heat and pollution generated by gas lighting, and reduced the risk of fire. Therefore, the cost of lighting the electricity is offset by the reduction of fire insurance premiums. Frank J. Spragg developed the first successful DC motor in 1886. By 1889, 110 Electric Street Railroad was planning on using his equipment. Electric trams became the main infrastructure before 1920. AC (Induction Motor) was developed in the 1890s and soon became used for industrial electrification. Household electrification did not spread until the 1920s, and it began to spread in cities. Fluorescent lamps were commercialized at the 1939 Expo

Due to the development of the internal combustion engine at the beginning of the 20th century, the pump unit was electrified. Since the gear-rotor gasoline engine meets pumping problems, the first petrol-driven fire engine has two motors, one for driving the pump and the other for propelling the vehicle belongs to. The first pump, which used a single engine for pumping and propulsion, was manufactured in the United States in 1907. By 1925, the steam pump was completely replaced by an electric pump. Although these pumps were initially piston or reciprocating, these pumps were gradually replaced by rotary pumps and eventually replaced with centrifugal pumps. Centrifugal pumps are used in most modern pumps.