Method for constructing linear model for heat exchange between rivers, lakes and atmosphere in ice period

A linearization, atmospheric technology, applied in design optimization/simulation, special data processing applications, instruments, etc.

Active Publication Date: 2021-03-23
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

The method solves the problem of heat transfer coefficient calculation method through the selection of river, lake and atmospheric heat transfer models and more reasonable linearization of nonlinear models

Method used

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  • Method for constructing linear model for heat exchange between rivers, lakes and atmosphere in ice period
  • Method for constructing linear model for heat exchange between rivers, lakes and atmosphere in ice period
  • Method for constructing linear model for heat exchange between rivers, lakes and atmosphere in ice period

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Embodiment

[0074] This embodiment is a method for constructing a linearized model of heat exchange between rivers, lakes and the atmosphere during glacial periods. The method described is based on the research results of solar energy utilization, climatology, hydrology and water resources, and first establishes a nonlinear heat exchange model suitable for frozen rivers and lakes and the atmosphere, including solar radiation, long-wave radiation, evaporation-cooling and convection . on the basis of:

[0075] 1) Based on the prototype observation, it is found that the surface temperature T of frozen rivers and lakes s close to T a , including snow cover and exposed ice surface, at T s =T a A method for linearizing a nonlinear heat transfer model between rivers, lakes and the atmosphere.

[0076] 2) A linear regression method is proposed to determine the heat exchange coefficient h based on the historical daily average weather data of the weather station sa and method of linearizing...

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Abstract

The invention relates to a method for constructing a linear model for heat exchange between rivers, lakes and atmosphere in an ice period. The method comprises the following steps: calculating solar radiation net heat flux; calculating the heat flux of long-wave radiation of rivers and lakes; calculating the heat flux of long-wave atmospheric reverse radiation to the river surface; calculating theheat flux of evaporative-cooling; calculating the heat flux of air convection; calculating the daily average net heat flux of the river and lake surfaces; constructing a linear river and lake and atmosphere heat exchange model; and constructing a linear heat exchange model of the research area. A nonlinear heat exchange model suitable for the iced rivers and lakes and the atmosphere is established and comprises solar radiation, long-wave radiation, evaporative cooling and convection, it is found that the surface temperature of the iced rivers and lakes is close to the measured air temperature1.5 m above the river surface and comprises snow covers and exposed ice cover surfaces, and the nonlinear heat exchange model of the rivers and lakes and the atmosphere is linearized, a linear regression method is adopted based on historical daily average weather data of a meteorological station, and the problem that the values of heat exchange coefficients are greatly different is solved.

Description

technical field [0001] The invention relates to a method for constructing a linearized model of heat exchange between rivers, lakes and the atmosphere during the glacial period, and is a hydrological calculation method. Background technique [0002] The heat exchange model between rivers, lakes and the atmosphere is the basis for calculating and analyzing the temporal and spatial changes of ice formation, development, and ablation, and it is also an important topic in the research of solar energy utilization, climate change, hydrology, and water resources. Heat exchange in rivers and lakes refers to the heat exchange between open water surface, ice cover and snow cover and solar radiation, long-wave radiation, surface evaporation-cooling and convection, snowfall or rainfall. [0003] Solar radiation refers to the energy transmitted from the sun in the form of electromagnetic waves, and refers to the flow of electromagnetic waves and particles emitted by the sun to the outer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F113/08G06F119/08
CPCG06F30/20G06F2113/08G06F2119/08
Inventor 杨开林郭新蕾王涛郭永鑫付辉李甲振彭旭明吴煜楠潘佳佳纪平
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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