Calculate the cooling tower high temperature weather conditions

In the industrial circulating water cooling design specification ( GB / T50102 - 2003). For high water temperature of cooling towers, used in cooling step, cooling circulating water of high temperature cannot exceed production need high temperature, and in the calculation of the cooling water high temperature, want to consider the meteorological conditions of the environment, and meteorological conditions to comply with the requirements for temperature calculation: the equipment using the surrounding environment of meteorological condition and dry wet bulb temperature have a bigger impact on the use of cooling tower, if calculation method calculated, regardless of weather conditions will lead to the use of calculation results and the actual water temperature caused by mismatch, cause power consumption is too large, or the problems such as insufficient cooling capacity. Weather conditions: 1. Using the meteorological data of high cooling tower water temperature is calculated after a 2 - The use of three years, according to the theory of thermal phase to compute the average of a year, theory of thermal phase is concentrated in the June, July and August in China. 2. At the time of equipment used, if more strict with cooling water temperature, can be appropriate to improve meteorological conditions; If the device to request is not high, the water temperature of cooling water can be appropriate to reduce meteorological conditions. 3. Wet bulb temperature requirements, should according to the statistical frequency of 5% wet bulb 10% on average. Meteorological parameters statistical methods: 1. Wet bulb frequency statistics method: according to the statistics of the average daily dry bulb temperature and wet bulb separate statistics, and notification and trend analysis on a graph, according to the drawing of drawing curve chart for the wet bulb for calculating temperature of the same point in time. 2. The curve of the dry bulb temperature and relative humidity statistical methods: dry bulb temperature and relative humidity were graphed, telling the graph on the same frequency dry bulb temperature and wet bulb temperature relatively calculated value. 3. The average daily wet bulb temperature of wet bulb temperature curve drawing method: the main statistics and graph, according to the graph drawing, find out the design frequency under the wet bulb temperature value, and find out and dry bulb temperature and relative humidity, air pressure corresponding to the daily average. 4. Dry bulb temperature curve drawing method: the main statistical average dry bulb temperature, and a graph, according to the graph to find out in the design of frequency under the dry bulb temperature, as the calculated value, and benefits in the original data corresponding to the dry bulb temperature and relative humidity. 5. Enthalpy curve drawing method: according to the daily average dry wet bulb temperature and atmosphere pressure to calculate the average enthalpy, again according to the calculation of the daily average enthalpy graph, according to the design frequency curve calculated enthalpy, and find the day and the enthalpy corresponding to the average dry bulb temperature and the sheet temperature, atmospheric pressure. Fish in closed cooling tower heat transfer power is in the process of mass transfer of water saturated moist air into the cooling tower outside the surface of the moist air enthalpy difference. Wet air enthalpy depends on air temperature for the first goal.

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