Calculation module for numerical weather forecast mode based on urban canopy man-made heat

Abstract

The invention discloses a calculation module for a numerical weather forecast mode based on urban canopy man-made heat. The module comprises a measurement unit and a calculation unit; the density of the building is calculated according to the average height of the building of a urban street valley and the average width of the street valley which are obtained by measuring; the maximum value of theman-made heat is determined according to the obtained building density value; the man-made heat is obtained according to the maximum value of the human heat and a proportion coefficient; the man-madeheat flux is obtained through calculation according to the man-made heat and an adjustable function, the height of test points perpendicular to the ground surface, the air density and the heat conductivity of the test points; and the obtained man-made heat flux is added into a capacity balance equation heat item in a numerical weather forecast mode. According to the calculation module, the man-made heat flux is added into the capacity balance equation heat item in the numerical weather forecast mode, the problems that the simulation capability of the numerical weather forecast mode on the urban air temperature is poor and urban air temperature can be estimated in most situations can be effectively improved, so that the urban air temperature can be simulated more accurately by the numericalweather forecast mode.

Description

technical field [0001] The invention relates to the field of numerical weather prediction models, in particular to a calculation module of a numerical weather prediction model based on urban canopy artificial heat. Background technique [0002] With the intensification of global urbanization, the types of surface land use are undergoing profound changes. Cities are areas where human production and living activities are highly concentrated. In these activities, a large amount of energy is consumed, and a large amount of heat emission is generated, that is, the anthropogenic heat emission of the urban canopy. In the physical process of heat balance, the share of man-made heat is so large that it cannot be ignored. Taking the heat dissipation of air conditioners as an example, suppose there is a 10-story building with a size of 200m×50m, and a 1500W air conditioner is installed in each room (20m×10m). Assuming that the heat engine efficiency is 40% under the rated power, and t...

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Problems solved by technology

[0003] Numerical weather prediction models have been widely used in research fields such as weather-related power load forecasting and new energy power forecasting. The simulation ability of air temperature is poor, and the urban air temperature will be underestimated in most cases

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