Cooling tower in the design of thermal parameters

1. Design under the condition of meteorological parameters ( 1) Outdoor air to calculate temperature influence on the temperature of cooling tower fruit, its indicators include dry bulb temperature and wet bulb temperature: O. Such as the design calculation of the temperature is too high, fixed, increase the size of the cooling tower construction, make capital cost increases, increased conversely summer time can't meet the production requirements. Thermal power sector often USES three months when the frequency is 10% of dry, nie bulb temperature as design calculation basis, other departments use hot 5 each year, the i5 day average years and disheartening. ( 2) Wind speed usually adopt six, seven, eight years summer three months average wind speed or thermidor average wind speed. Basic wind speed calculation generally take 2 meters from ground wind speed, and according to the 'TJ9 - load code for the design of industrial and civil building structures 74 'the formula conversion h meters from ground wind speed. ( 3) The atmospheric pressure is usually taken years average air pressure or thermidor average summer. In order to simplify the expression form, the meteorological conditions of fixed can also be used in the design of the following parameters: ( 1) Q, dry bulb temperature, 2) Wet bulb temperature r, (3) Relative humidity, its value can be made of dry and wet bulb temperature, wind speed and atmospheric pressure conversion and, 2. Design production process parameters under the condition of cooling tower under the condition of various production process parameters, according to the production equipment nameplate. Expressed in coal-fired power plants commonly used a set of the following parameters: ( 1) O, hydraulic load tons/hour; ( 2) The steam turbine condenser inlet water temperature ( The cooling tower export water temperature. ( 3) The steam turbine condenser inlet and outlet water temperature difference ( The water temperature at the inlet and outlet of the cooling tower) 。

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