Abstract: The circulating water temperature is an important index for ensuring good vacuum of condenser and reducing the energy consumption of unit. If the circulating water temperature decreased by 1℃, the vacuum of the condenser would increase by 400～500Pa, and the unit coal consumption would decrease by 1.0～1.5g/(kW·h). As an important equipment of circulating cooling system in thermal power plant, the cooling effect of cooling tower is the key factor influencing on circulating water temperature. Based on the consideration of enhancing the cooling effect of cooling tower, taking the hyperbolic wet cooling tower with natural convection in 300MW thermal power plant as prototype, a simulating test device for circulating cooling system was designed and built. The calculation of aerodynamic characteristics for the model tower was carried out to realize the purpose of simulating the internal flow of the cooling tower and evaluating the cooling effect in 300MW thermal power plant to some extent.

Key words: thermal power plant, cooling tower, modeling, aerodynamic characteristics calculation