CN-122020967-A - Dynamic water surface heat dissipation coefficient determination method for nuclear power station warm water drainage simulation

CN122020967ACN 122020967 ACN122020967 ACN 122020967ACN-122020967-A

Abstract

The invention relates to a dynamic water surface heat dissipation coefficient determination method for nuclear power station warm water drainage simulation, which comprises the steps of obtaining historical meteorological hydrologic data of a nuclear power station, wherein the time span is more than 10 years, the historical meteorological hydrologic data at least comprises wind speed, air temperature, water temperature and relative humidity, dividing climate nodes based on the historical meteorological hydrologic data to obtain a plurality of climate seasons, calculating meteorological hydrologic parameter sets for each climate season, calculating corresponding water surface comprehensive heat dissipation coefficients for each meteorological hydrologic parameter set, obtaining current meteorological hydrologic data, determining current climate nodes, and dynamically selecting the water surface comprehensive heat dissipation coefficients corresponding to the current climate nodes. By dividing one year into a plurality of climate seasons and calculating a specific water surface heat dissipation coefficient value for each season, key parameters in digital simulation can dynamically respond to periodic changes of actual weather hydrologic conditions, and the effect that a simulated temperature rise field is more identical with actual conditions in time dimension and space distribution is achieved.

Inventors

LIU RUINI
LU YING
LI XIAOXIAO
ZHU JUN
CHEN CHAO
LIU TUANTUAN
HAO YING
Xiang Silu

Assignees

中国辐射防护研究院

Dates

Publication Date: 20260512
Application Date: 20251227

Claims (10)

1. A dynamic water surface heat dissipation coefficient determining method for nuclear power station warm water drainage simulation is characterized by comprising the following steps: Acquiring historical meteorological hydrologic data of a nuclear power station, wherein the time span of the historical meteorological hydrologic data is more than 10 years, the historical meteorological hydrologic data at least comprises four elements, and the four elements are wind speed, air temperature, water temperature and relative humidity; dividing climate nodes based on the historical meteorological hydrologic data to obtain a plurality of climate seasons; Calculating a corresponding set of weather hydrographic parameters for each of a plurality of said weather seasons; Calculating a corresponding comprehensive water surface heat dissipation coefficient according to a meteorological hydrological parameter set corresponding to each climate season; And acquiring current weather hydrologic data, determining a current weather node according to the current weather hydrologic data, and dynamically selecting a water surface comprehensive heat dissipation coefficient corresponding to the current weather node.
2. The method for determining the dynamic water surface heat dissipation coefficient for the warm water drainage simulation of the nuclear power station according to claim 1, wherein the climate node division is performed based on the historical meteorological hydrologic data to obtain a plurality of climate seasons, and the method comprises the following steps: dividing the historical meteorological hydrologic data into a plurality of time periods at intervals of one year based on the historical meteorological hydrologic data; for each time period of a plurality of time periods, carrying out homogenizing time period identification, and determining a working condition demarcation point of climate change in each time period; Integrating the working condition boundary points in a plurality of time periods, constructing a data table according to a time sequence, removing the working condition boundary points with mutation in the plurality of working condition boundary points, and taking an average value by the rest working condition boundary points to obtain a climate node; and dividing the historical meteorological hydrologic data based on the climate nodes to obtain a plurality of climate seasons.
3. The method for determining the dynamic water surface heat dissipation coefficient for the warm water drainage simulation of the nuclear power plant according to claim 2, wherein for each of a plurality of time periods, the homogeneous time period identification is performed, and the working condition demarcation point of the climate change in each time period is determined, comprising: constructing a time sequence for each element, and identifying the date point of the mutation of the element characteristics by adopting a mutation point detection statistical method; forming potential demarcation points under each element by the date points; determining the number of potential demarcation points in each time period, and under the condition that the time interval between adjacent potential demarcation points is less than one month, calculating the midpoint value of the potential demarcation points with the time interval less than one month, and replacing the two adjacent potential demarcation points with the midpoint value; Based on the plurality of potential demarcation points, operating condition demarcation points for climate change within each time period are determined.
4. A method for dynamic water surface heat rejection coefficient determination for nuclear power plant warm water drainage simulation according to claim 1, wherein calculating a corresponding set of weather hydrographic parameters for each of a plurality of said weather seasons comprises: The weather season comprises weather hydrologic data of a preset time period in each year, average value calculation is carried out on the weather hydrologic data in the preset time period in each year, and first average value data is obtained, wherein the weather hydrologic data comprises a plurality of elements, and the first average value data comprises an average value of the plurality of elements; the weather season further comprises first average value data of a plurality of years, and average value calculation is carried out on the first average value data of a plurality of years to obtain a weather hydrologic parameter set, wherein the weather hydrologic parameter set comprises average values of a plurality of elements.
5. The method for determining the dynamic water surface heat dissipation coefficient for the warm water drainage simulation of the nuclear power plant according to claim 1, wherein for each weather season corresponding weather hydrologic parameter set, the corresponding water surface comprehensive heat dissipation coefficient is calculated, comprising: Determining the slope of a saturated water vapor pressure curve based on the water surface saturated water vapor pressure and the water surface water temperature of the nuclear power station warm water drainage; Determining the evaporation latent heat coefficient of the warm water drainage of the nuclear power station and meteorological hydrologic data above a preset water surface height, wherein the meteorological hydrologic data, the saturated water vapor pressure of the water surface and the water temperature of the water surface are all data in the same time; Calculating a water surface evaporation coefficient based on the meteorological hydrological data and the water surface water temperature; And calculating the comprehensive water surface heat dissipation coefficient corresponding to each climate season according to the slope of the saturated water vapor pressure curve, the evaporation latent heat coefficient, the meteorological hydrologic data and the water surface evaporation coefficient.
6. The method for dynamic water surface heat dissipation coefficient determination for nuclear power plant warm water drain simulation of claim 5, wherein determining the slope of the saturated water vapor pressure curve based on the water surface saturated water vapor pressure and the water surface water temperature of the nuclear power plant warm water drain comprises: Wherein, the Is the slope of the saturated water vapor pressure curve, Is the water temperature of the water surface, For water temperature of Corresponding water surface saturated steam pressure.
7. The method for dynamic water surface heat dissipation factor determination for nuclear power plant warm water drain simulation of claim 5, wherein calculating the water surface evaporation factor based on meteorological hydrologic data and water surface water temperature comprises: Wherein, the Is the evaporation coefficient of the water surface, The wind speed above the height is preset for the water surface, The difference between the temperature at the preset height and the water temperature is preset for the water surface.
8. A dynamic water surface heat dissipation coefficient determining device for nuclear power station warm water drainage simulation, comprising: The system comprises a data acquisition module, a control module and a control module, wherein the data acquisition module acquires historical meteorological hydrologic data of a nuclear power station, the time span of the historical meteorological hydrologic data is more than 10 years, the historical meteorological hydrologic data at least comprises four elements, and the four elements are wind speed, air temperature, water temperature and relative humidity; The season dividing module is used for dividing climate nodes based on the historical meteorological hydrologic data to obtain a plurality of climate seasons; The parameter calculation module is used for calculating a corresponding meteorological hydrological parameter set for each of a plurality of climate seasons; The heat dissipation coefficient calculation module is used for calculating a corresponding comprehensive heat dissipation coefficient of the water surface according to a weather hydrological parameter set corresponding to each weather season; and the working condition matching and selecting module is used for acquiring current weather hydrologic data, determining a current weather node according to the current weather hydrologic data, and dynamically selecting a water surface comprehensive heat dissipation coefficient corresponding to the current weather node.
9. A non-volatile storage medium storing a plurality of instructions adapted to be loaded by a processor and to perform a dynamic water surface heat dissipation factor determination method for nuclear power plant warm water drain simulation as claimed in any one of claims 1 to 7.
10. A computer program product comprising a computer program, characterized in that the computer program, when executed by a processor, implements the steps of a dynamic water surface heat dissipation factor determination method for nuclear power plant warm water drainage simulation as claimed in any one of claims 1 to 7.

Description

Dynamic water surface heat dissipation coefficient determination method for nuclear power station warm water drainage simulation Technical Field The invention relates to the technical field of numerical simulation of nuclear power station warm water drainage, in particular to a dynamic water surface heat dissipation coefficient determination method for nuclear power station warm water drainage simulation. Background In the warm water drainage process of the nuclear power station, the water surface heat dissipation coefficient is required to be obtained, and then the drainage amount and the drainage rate are determined, however, in the related technology, the climate change of the surrounding temperature of the nuclear power station in the actual drainage process cannot be considered, and a single fixed experience value is mostly adopted as the water surface comprehensive heat dissipation coefficient, or an average value is directly adopted as the water surface comprehensive heat dissipation coefficient. In the related art, due to the adoption of a fixed and static water surface heat dissipation coefficient value, the physical foundation is unreal in the numerical simulation process, and a large deviation exists between the physical foundation and the actual situation. Meanwhile, a non-representative fixed value (such as an annual average value) is used, so that the influence range of the temperature rise can be seriously underestimated or overestimated, namely, if the used fixed value is higher, the heat dissipation capacity is overestimated, the temperature rise is underestimated, the environmental risk is brought, and if the used fixed value is lower, the used fixed value is excessively conservative, and the engineering design waste can be caused. In addition, the unified fixed value is used, the local environmental climate characteristics of the nuclear power station cannot be considered, and the simulation reliability is low. The above problems are to be solved. Disclosure of Invention The invention discloses a dynamic water surface heat dissipation coefficient determination method for nuclear power station warm water drainage simulation, and aims to solve the technical problems in the prior art. The invention adopts the following technical scheme: On one hand, the invention provides a dynamic water surface heat dissipation coefficient determination method for warm water drainage simulation of a nuclear power station, which comprises the steps of obtaining historical meteorological hydrologic data of the nuclear power station, wherein the time span of the historical meteorological hydrologic data is greater than 10 years, the historical meteorological hydrologic data at least comprises four elements, the four elements are wind speed, air temperature, water temperature and relative humidity, climate node division is carried out based on the historical meteorological hydrologic data to obtain a plurality of climate seasons, a corresponding meteorological hydrologic parameter set is calculated for each of the plurality of climate seasons, a corresponding water surface comprehensive heat dissipation coefficient is calculated for each climate season, current meteorological hydrologic data is obtained, a current climate node is determined according to the current meteorological hydrologic data, and the water surface comprehensive heat dissipation coefficient corresponding to the current climate node is dynamically selected. The method comprises the steps of dividing weather nodes based on historical weather hydrologic data to obtain a plurality of weather seasons, dividing the weather seasons into a plurality of time periods based on the historical weather hydrologic data at intervals of one year, identifying homogeneous time periods according to each of the time periods to determine working condition demarcation points of weather changes in each time period, integrating the working condition demarcation points in the time periods, constructing a data table according to time sequence, eliminating the working condition demarcation points with abrupt change in the working condition demarcation points, taking an average value of the remaining working condition demarcation points to obtain the weather nodes, and dividing the historical weather hydrologic data based on the weather nodes to obtain the weather seasons. Optionally, for each of a plurality of time periods, carrying out homogeneous time period identification, determining working condition demarcation points of climate change in each time period, wherein the working condition demarcation points comprise the steps of constructing a time sequence for each element, adopting a mutation point detection statistical method, identifying date points with mutation of element characteristics, constructing potential demarcation points under each element by the date points, determining the number of the potential demarcation points in each time period, carrying out