Determination method of indoor particle sedimentation parameters based on dynamic mass balance

A mass-balancing, method-determining technique with application in the field of environmental science

Inactive Publication Date: 2019-05-24
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the determination of particle sedimentation rate has been very variable

Method used

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  • Determination method of indoor particle sedimentation parameters based on dynamic mass balance
  • Determination method of indoor particle sedimentation parameters based on dynamic mass balance
  • Determination method of indoor particle sedimentation parameters based on dynamic mass balance

Examples

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Embodiment 1

[0029] 1. Experimental location

[0030] The experimental observation site of this example is located in an office building in Qingdao City, and the sampling point is located on the top floor of a four-story office building, with a relatively wide outdoor view, and the indoors are naturally ventilated through windows and doors, and the ventilation conditions are good. The office area is about 15m 2 , two steel single-layer exterior windows, each with an area of ​​2 m 2 . The outer door is a single anti-theft door. There are 2 office workers in the room, equipped with 2 computers and 1 laser printer. There are no other obvious sources of pollution indoors.

[0031] The particle measuring instruments are two 24-hour Light House dust particle counters, which are used to measure the number of dust particles per unit volume in the indoor and outdoor air environments. The measured particle sizes are 0-0.3μm, 0.3-0.5μm, 0.5-1.0μm, 1.0-2.5μm. The monitoring period is 2016-04-07 ...

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Abstract

The invention discloses a determination method of indoor particle sedimentation parameters based on dynamic mass balance, and belongs to the field of environmental science. The method includes the following steps: firstly, selecting a to-be-measured room, and arranging dust particle counters inside and outside the to-be-measured room as measuring instruments for indoor and outdoor particles; secondly, starting the measuring instruments for synchronous determination; thirdly, obtaining the parameters of indoor and outdoor particle concentration ratios, ventilation times, sedimentation rates andpermeability factors through the dust particle counters and data analysis; and finally, establishing a mass balance equation based on the dynamic balance of particles and calculating to obtain a sedimentation rate Kcomp and permeability P of the to-be-measured room by using a least square method. The determination method of the indoor particle sedimentation parameters based on the dynamic mass balance determines the permeability and the sedimentation rate by using the mass balance equation, which can better understand indoor particle dynamics and behavior under natural ventilation conditionsand helps to analyze the particle size distribution of the indoor particles.

Description

technical field [0001] The invention relates to the field of environmental science, in particular to a method for determining indoor particle settling parameters based on dynamic mass balance. Background technique [0002] According to statistics: people spend about 85-90% of their time indoors every day, so the impact of indoor environmental pollution control on human health is very important. Suspended particulate matter in the outdoor atmosphere generally enters the indoor environment through the building envelope through the gaps in the building, and stays indoors for a long time without settling. Therefore, the indoor particle concentration distribution largely depends on the penetration of these particles through the building envelope and the degree of suspension in the indoor air. Therefore, even in the absence of obvious pollution sources indoors, the indoor particle concentration distribution may not be equivalent to the outdoor particle concentration distribution ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/04
Inventor 丛晓春倪鹏飞王庆刚景洲
Owner SHANDONG UNIV OF SCI & TECH
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