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Commercial kitchen exhaust air rate optimization method based on oil fume trapping efficiency

A technology of collection efficiency and exhaust air volume, applied in the field of numerical simulation of computational fluid dynamics, can solve problems such as increased energy consumption, increased noise intensity, large indoor negative pressure, etc., to achieve the effect of setting certain and accurate

Pending Publication Date: 2020-02-04
TIANJIN UNIV
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  • Application Information

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Problems solved by technology

Excessive exhaust air volume will cause excessive indoor negative pressure, increase energy consumption, and increase noise intensity

Method used

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  • Commercial kitchen exhaust air rate optimization method based on oil fume trapping efficiency
  • Commercial kitchen exhaust air rate optimization method based on oil fume trapping efficiency
  • Commercial kitchen exhaust air rate optimization method based on oil fume trapping efficiency

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Embodiment Construction

[0016] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0017] A method for determining the recommended exhaust volume of a commercial kitchen based on the oil fume capture efficiency of the present invention is applied to the commercial kitchen calculation example of the CFD model schematic diagram, and the specific implementation is described as follows:

[0018] Step 1. First establish a typical commercial kitchen model, such as figure 2 Shown is a schematic diagram of a CFD model of a specific embodiment of the present invention. In the process of model simulation, the exhaust outlet of the range hood is set as the velocity outlet boundary. Assuming that the flow velocity of each point on the surface of the exhaust outlet is evenly distributed, and in the case of a certain area of ​​the exhaust outlet, different exhaust air volumes can be obtained by changing the veloci...

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Abstract

The invention discloses a commercial kitchen exhaust air rate optimization method based on oil fume trapping efficiency, which comprises the following steps: step 1, establishing a typical commercialkitchen model, and calculating the primary trapping efficiency of oil fume particulate matters under various range hood exhaust air rate working conditions; 2, obtaining a fitting curve of the exhaustair rate of the range hood and the corresponding primary trapping efficiency; 3, solving the slope of the tangent line of each working condition point on the fitting curve, and defining the slope asan efficiency growth rate G eta; and 4, assuming that the primary trapping efficiency is basically stable when the efficiency growth rate G eta is smaller than 0.005, defining the exhaust air rate when the efficiency growth rate is 0.005 as the recommended exhaust air rate, and taking the recommended exhaust air rate as the critical exhaust air rate for achieving the purposes of energy conservation and consumption reduction. Compared with the prior art, the method has the advantages that the reasonable exhaust air rate required by the commercial range hood can be quantitatively and accuratelydetermined, so that the setting of the exhaust air rate of the commercial range hood is more determined and accurate, and is more practical.

Description

technical field [0001] The invention relates to the technical field of numerical simulation of computational fluid dynamics (CFD), in particular to a method for determining the recommended exhaust volume of a commercial kitchen. Background technique [0002] The problem of indoor air quality in commercial kitchens has attracted the attention of many scholars in recent years. Inhaling a large amount of oily fume will have adverse effects on human health, especially for relevant practitioners such as restaurants, schools or staff canteens. [0003] In order to effectively reduce the concentration of indoor oil fume pollutants, the method of increasing the exhaust air volume of the range hood is often adopted during the use of the range hood. The extraction process of the range hood can be approximately regarded as a point-sink type suction, that is, the flow rate on each constant velocity sphere at different distances from the sink point is equal, and theoretically speaking, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28
Inventor 尤学一陈若凝
Owner TIANJIN UNIV
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