m3/(s · GW) corresponds to cubic meters per gigawatt second. This is cubic meters per million kilowatt seconds, that is, how many cubic meters of water are consumed per second to produce gigawatts (million kilowatts) of electricity.
During the operation of thermal power plants, in addition to consuming primary energy and emitting pollution, they also consume a large amount of water resources. The water consumption indicator has become one of the most important economic evaluation indicators. thermal power plants. Fresh water resources are needed to meet urban development, irrigation of agricultural lands, etc. The dependence of thermal power plants on water resources poses a huge burden to areas deprived of water resources.
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Steam turbine exhaust air cooling technologyeur of thermal power plants has been widely used in water-poor areas of northern China. The steam turbine generator. Main engine exhaust is adopted. After air cooling system, compared with wet cooling unit with circulating water supply, the whole plant can save about 80% water. Currently, the installed capacity of air-cooled units represents approximately 14% of the total installed thermal power capacity. Compared with conventional secondary cycle wet-cooled units, they can save about 1.2 billion tons of water resources every year.
After the host adopts air cooling technology, the operating back pressure increases and the coal consumption for power supply increases significantly. At the same time, the investment in air cooling system ishigher than that of conventional wet cooling units. For a 2 × 600 MW unit, the investment is about 200 to 300 million yuan higher. In addition, air cooling technology also has problems such as poor vacuum sealing of the system, serious dirt on the outer surface of the air-cooled condenser, and high dissolved oxygen content in the condensed water of the system. air cooling. The current development trend of air cooling technology for coal-fired power generation units is mainly to improve the economics of air cooling units and reduce coal consumption.
Baidu Encyclopedia - Thermal Power Plant
The water circulating in thermal power plants is divided into open cycle and closed cycle. The water consumption of the closed cycle is very low. Your factory must belong to the cycthe open. The amount of circulating water extracted is related to the operating time of the unit. Currently, the annual operating time of the power plant is only about 5,500 hours, so it is more reliable to calculate the water consumption at 5,500 hours.