Method for confirming optimal installation position of gas alarm in kitchen based on CFD (Computational Fluid Dynamics)

A gas alarm, installation location technology, applied in geometric CAD, CAD numerical modeling, instruments, etc., can solve problems such as installation location that does not involve the shortest alarm time, and achieve accurate and reliable calculation results and visualization of the operation process.

Pending Publication Date: 2022-08-02
CHINA JILIANG UNIV
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Problems solved by technology

Although the current industry standard CJJ / T146-2011 "Technical Regulations for Urban Gas Alarm Control System" stipulates the installation location of the gas alarm in the kitchen, it is a large area rather than a precise coordinate point, and it does not involve the alarm time. Shortest install location related content

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  • Method for confirming optimal installation position of gas alarm in kitchen based on CFD (Computational Fluid Dynamics)
  • Method for confirming optimal installation position of gas alarm in kitchen based on CFD (Computational Fluid Dynamics)
  • Method for confirming optimal installation position of gas alarm in kitchen based on CFD (Computational Fluid Dynamics)

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Embodiment Construction

[0067] like figure 1 As shown, the present invention discloses a method for confirming the optimal installation position of a gas alarm in a kitchen based on CFD, comprising the following steps:

[0068] Step 1: 3D modeling: By actually measuring the interior features and dimensions of the kitchen, a proportional model is established in the 3D modeling software Solidworks. In 3D modeling, the X, Z, and Y axes of the model should be parallel to the length, width, and height of the kitchen, respectively, and the Cartesian coordinate origin of the model coincides with the geometric center of the kitchen. Some irregular, tiny-volume object structures are replaced by ideal geometry. The final model of the kitchen interior space is as follows figure 2 As shown in the figure, the length, width and height of the kitchen are represented by L, W and H respectively.

[0069] Step 2: Definition of boundaries and domains: Import the kitchen interior space model established in Step 1 in...

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Abstract

The invention belongs to the field of natural gas leakage detection, and relates to a method for determining the optimal installation position of a gas alarm in a kitchen based on CFD. The method specifically comprises the following steps: 1, three-dimensional modeling; 2, defining a boundary and a domain of the model; 3, dividing grids; 4, solving and calculating; 5, post-treatment; and sixthly, a gas alarm is installed. According to the invention, the CFD technology is utilized to simulate the leakage of natural gas in a natural gas stove in a closed kitchen at the maximum rate, and the coordinate point at which the volume fraction of methane reaches the alarm set value of a gas alarm first in the installation area meeting the current industrial standard on the peripheral wall and ceiling is obtained; and the point is the optimal mounting position of the gas alarm in the kitchen. According to the invention, the blank of the current industrial standard of the installation area of the gas alarm is filled, and the alarm time of the gas alarm is shortest when the natural gas is accidentally leaked in the kitchen, so that effective measures can be taken in time to prevent leakage, and the accident risk is greatly reduced.

Description

technical field [0001] The invention relates to a method for confirming the optimal installation position of a gas alarm in a kitchen based on CFD, and belongs to the field of natural gas leakage detection. Background technique [0002] Natural gas is a colorless and odorless gaseous fossil fuel, which is regarded as clean energy and is widely used in raw materials for industrial production and household cooking and heating. The demand for natural gas in today's world has increased significantly. However, due to various reasons such as aging of pipelines and irregular use of gas equipment by users, there are more and more natural gas explosion accidents, resulting in a large number of personal casualties and economic losses. Most of the natural gas explosion accidents occur indoors, and the kitchen is the high incidence of indoor natural gas explosion accidents. Therefore, it is urgent to install gas alarms with high-precision methane sensors in the kitchen to effectively pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28G06T17/20G06F30/23G06F30/13G06F111/10G06F113/08G06F119/08G06F119/14
CPCG06F30/28G06T17/20G06F30/23G06F30/13G06F2111/10G06F2113/08G06F2119/08G06F2119/14
Inventor 韩斌陈红岩叶有祥韩俊宝
Owner CHINA JILIANG UNIV
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