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Since the 1950s, researchers in the United States and Germany, the industrialized countries, began to develop the supercritical and ultra-supercritical units. After 30 years of research, development and improvement, to the 1980s, the supercritical and ultra supercritical power generation gradually became the mature technologies. With the rising of operational reliability and availability, supercritical units became the dominant direction of international development of coal-fired power plants.
After the 1990s of the 20th century, along with the increasingly stringent requirements of environmental protection of international community and the successful development of new materials, the ultra-supercritical thermal power technology with higher efficiency and fewer emissions has been rapidly developed and successful applied. To the late 1990s, ultra-supercritical thermal power technology has become a mature, advanced, high-efficient and mainstream of clean coal power generation technology in the world. Based on the experience of development of supercritical technologies all over the world, the efficiency improvements of the unit may be derived from many factors, such as lower boiler exhaust gas temperature, high efficiency main and auxiliary equipment, good combustion of coal, the higher water temperature, the lower condenser pressure, lower system losses, the series of reheat steam and so on. According to the study, the maximum of increased efficiency is due to increased steam parameters. This factor offers 50% or so of the total efficiency improvement.
Actively using high-efficient, energy-efficient, environmentally friendly supercritical thermal power generation units for Taiwan is imperative, and it is also an inevitable choice, which is the main contemporary trends of power equipment technology development. To understand how Taipower optimizes the thermal power plant in a most effective way by installation of the New Lin-Ko power plant, both to improve the thermal efficiency of the units and also to improve the environmental conditions, has significant social and economic benefits. Supercritical and ultra-supercritical and even high-ultra-supercritical generation units have become the superb mainstream of the development of the world''s coal-fired generation units. Our government needs to be well aware of this trend for establishing an energy policy which meets the future requirements.
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