Parameter calculation method, system, medium, terminal, battery pack for refrigerant flow heat transfer in tubes

Abstract

The invention provides a method and a system for calculating parameters of flow heat transfer of a refrigerant in a tube, a medium, a terminal and a battery pack. The method comprises the following steps: setting the pressure in a state equation of a thermodynamic system as an independent variable; calculating a saturated liquid phase Prandtl number vector; calculating heat transfer coefficient vectors of all nodes based on the saturated liquid phase Prandtl number vector; based on an energy relationship, calculating a first relation curve of a coordinate vector and a saturation pressure vector of a node according to the heat transfer coefficient vector of the node and a heat flow loaded on the node; calculating a second relation curve of the coordinate vector and the saturation pressure vector of the node based on a pressure relation; determining the coordinate parameters of the node according to an intersection of the first relation curve and the second relation curve; calculating the heat transfer coefficient at the node according to the coordinate parameters of all nodes. After the method and the system for calculating the parameters of the flow heat transfer of the refrigerantin the tube, the medium, the terminal and the battery pack are adopted, the parameters of the flow heat transfer of the refrigerant in the tube can be rapidly and accurately calculated.

Description

technical field [0001] The present invention relates to the technical field of data processing, in particular to a parameter calculation method, system, medium, terminal, and battery pack for refrigerant flow and heat exchange in tubes. Background technique [0002] An electric vehicle refers to a vehicle powered by a vehicle-mounted power supply, driven by a motor to drive the wheels, and conforming to the requirements of road traffic and safety regulations. Due to its smaller impact on the environment than traditional cars, its prospects are widely optimistic. Affected by traditional car driving habits, the requirement for long driving range of electric vehicles has gradually become a mainstream trend. For example, the Tesla Model-S long driving range version has a maximum pure electric driving range of nearly 500 kilometers. 400km electric car. [0003] Electric vehicles provide kinetic energy through the battery pack (Battery Pack) configured on it. As the energy dens...

AI Technical Summary

Problems solved by technology

But for the temperature uniform cold plate of the battery pack, this treatment method is insufficient, because when the refrigerant flows in the battery cold plate, it is easy to cause the temperature difference of the refrigerant to exceed 2degC due to the change of the pressure drop.

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