A method for constructing a linear model of heat exchange between rivers, lakes, and atmosphere during glacial periods

A linearization and atmospheric technique, applied in design optimization/simulation, instrumentation, calculation, etc.

Active Publication Date: 2021-06-08
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

The method solves the problem of calculating the heat transfer coefficient through the selection of the heat transfer model between rivers, lakes and the atmosphere and the more reasonable linearization of the nonlinear model

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  • A method for constructing a linear model of heat exchange between rivers, lakes, and atmosphere during glacial periods
  • A method for constructing a linear model of heat exchange between rivers, lakes, and atmosphere during glacial periods
  • A method for constructing a linear model of heat exchange between rivers, lakes, and atmosphere during glacial periods

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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, water resources and other disciplines. First, a nonlinear heat exchange model suitable for frozen rivers, lakes and the atmosphere is established, 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 meth...

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Abstract

The invention relates to a method for constructing a linearized model of heat exchange between rivers, lakes and the atmosphere during the glacial period, comprising: calculating the net heat flux of solar radiation; calculating the heat flux of long-wave radiation of rivers and lakes; calculating the heat flux of long-wave atmospheric inverse radiation to the river surface; Calculate the heat flux of evaporation-cooling; calculate the heat flux of air convection; calculate the daily average net heat flux on the surface of rivers and lakes; construct a linear heat exchange model between rivers and lakes and the atmosphere; construct a linear heat exchange model in the study area. The present invention 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, and finds that the surface temperature of frozen rivers and lakes is close to the air temperature measured at a height of 1.5m above the river, including On the surface of snow cover and bare ice cover, the method of linearizing the nonlinear heat exchange model between rivers, lakes and the atmosphere is proposed, and a linear regression method based on the historical daily average weather data of weather stations is proposed, which solves the huge difference in the value of heat exchange coefficient The problem.

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 Patents(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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