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A Numerical Calculation Method and Application of Condensing Air Volume of High-speed Train Air Conditioning

A numerical calculation and high-speed train technology, applied in special data processing applications, design optimization/simulation, geometric CAD, etc., can solve the problems of increased difficulty in air volume measurement and difficulty in ensuring the accuracy of test measurement results, so as to reduce measurement costs and meet Ride comfort requirements, guarantee the effect of normal operation

Active Publication Date: 2020-05-26
石家庄国祥运输设备有限公司
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AI Technical Summary

Problems solved by technology

[0008] When the vehicle is stationary, the condensing air volume of the train air conditioner can be arranged at the air conditioning condensing air inlet, which is more convenient for test and measurement; The difficulty of arranging equipment for air volume measurement will be greatly increased, and due to the interference of high-speed airflow, the accuracy of test measurement results is also difficult to guarantee
At present, there is no accurate and in-depth understanding of the relationship between the condensing air volume of high-speed train air conditioners and the variation of vehicle speed and its generation mechanism at home and abroad.

Method used

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Embodiment Construction

[0050] The present invention will be further described below in conjunction with accompanying drawing.

[0051] First, use geometric modeling software (such as Proe) to build a real-scale air conditioner and car body model:

[0052] Air-conditioning model: The air-conditioning model includes a condenser and a condensing fan. The condenser uses a porous media model to simulate the pressure drop effect of the airflow passing through the condenser. The fan blade of the condensing fan uses a real model, and the pressure jump through the condensing fan is calculated by Fluent software.

[0053] The pressure drop of the gas flow through the condenser is fitted by a quadratic polynomial to obtain the pressure drop formula of the condenser, such as Figure 6 As shown, the pressure drop formula is:

[0054] y=ax 2 +bx+c, where, y—pressure drop or resistance (Pa), x—wind speed (m / s);

[0055] Among them, y—resistance or pressure drop (Pa), x—wind speed (m / s).

[0056] Measure the ai...

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Abstract

A numerical calculation method for air conditioning condensation air volume of high-speed trains and its application, relating to the field of numerical simulation, in particular to a numerical calculation method for air conditioning condensation air volume of high-speed trains, and the application of the method in air-conditioning design of high-speed trains. Firstly, determine the numerical calculation method of air-conditioning condensing air volume for high-speed trains. The steps are to use the geometric modeling Proe software to establish a model, divide the calculation domain, divide the grid, set boundary conditions, calculate and correct the calculation results. On the basis of the above model, the model of the air inlet and outlet device is added for simulation calculation; the calculation results of different air inlet and outlet devices are compared, and the optimal air inlet and outlet structure is selected.

Description

technical field [0001] The invention relates to the field of numerical simulation, in particular to a numerical calculation method for the condensing air volume of a high-speed train air conditioner, and an application of the method in the design of a high-speed train air conditioner. Background technique [0002] The air conditioner installed on the top of the train is an important device to adjust the comfort of passengers. [0003] There are two ways of air inlet and outlet on the condensing side of the roof-mounted rail vehicle air conditioner: top in and side out, that is, the air flow first enters the condensation chamber from the condensing fan, and then is discharged to the outside atmosphere after heat exchange by the heat exchanger; side in and out, That is, the air flow first passes through the heat exchanger, and then is discharged to the outside atmosphere by the condensing fan. [0004] When the air conditioner is located on the top of the train, in order to f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F30/17G06F30/15
CPCG06F30/20
Inventor 闫英华宋会兵曾昭曙彭玉龙
Owner 石家庄国祥运输设备有限公司
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