Method for air change rate measurement in dwellings based on CO2 (carbon dioxide) produced by people

A technology of ventilation volume and human body, applied in the direction of measuring flow/mass flow, liquid/fluid solid measurement, measuring devices, etc., can solve problems such as limitations and uneven distribution of CO2 concentration

Inactive Publication Date: 2015-09-23
TIANJIN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] In order to solve the problems existing in the prior art, the present invention provides a method for measuring the ventilation volume of multi-zone buildings b

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  • Method for air change rate measurement in dwellings based on CO2 (carbon dioxide) produced by people
  • Method for air change rate measurement in dwellings based on CO2 (carbon dioxide) produced by people
  • Method for air change rate measurement in dwellings based on CO2 (carbon dioxide) produced by people

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Example Embodiment

[0026] The best implementation of the present invention is to calculate the ventilation volume of a multi-zone building during sleep at night. During this period personnel CO 2 The generation rate and the opening and closing of doors and windows are in a constant state, and when there is no sudden change in outdoor climate conditions, the building ventilation is considered to be a fixed value.

[0027] To make the technical solution of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. See the specific test and calculation flowchart figure 1 .

[0028] The first thing to describe is that CO is obtained in the present invention 2 The test method of concentration field test data, the specific test method includes the following steps, see the process figure 1 :

[0029] 1) Place CO in rooms where personnel are often active 2 Concentration testing equipment, such as bedroom, living room, study, ...

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Abstract

The invention provides a method for air change rate measurement in dwellings based on carbon dioxide produced by people. The method includes the steps of placing a CO2 concentration measurer, and drawing a planar space graph; recording personal information of dwellers and opening and closing conditions of doors and windows of a measured space; enabling the CO2 concentration measurer to work continuously for more than 24 hours; partitioning the measured space into one or more regions; calculating volumes of the regions; calculating the amount of CO2 produced by the people in every region according to height, weight and activity types of the dwellers; assuming an initial value of air change rate for each region; changing the assured air change rate of each region, and fitting a CO2 concentration curve so as to obtain an air change rate result of each region finally. An existing method for measuring the air change rate by tracer gas is limited economically and practically, and a method taking CO2 as the tracer gas is limited in single-region buildings. The method for the air change rate measurement has the advantages that by effective assuming, calculation for the air change rate measurement can be applied to multi-region spaces, the calculation problem for the air change rate of the multi-region spaces is solved, and the real-time air change rate of the multi-region spaces can be measured simply, conveniently, quickly and effectively.

Description

technical field [0001] The invention belongs to the technical field of building measurement, and in particular relates to a method for measuring multi-zone building ventilation. Background technique [0002] At present, tracer gas technology is mostly used in the measurement and calculation of building ventilation. The tracer gas technique calculates the building ventilation rate according to the tracer gas mass conservation equation. According to the tracer gas release and monitoring form, the technology can be divided into three categories: (1) tracer gas constant release method; (2) tracer gas attenuation method; (3) tracer gas constant concentration method. The tracer gas constant release method is to continuously release the tracer gas into the test space at a constant speed, monitor and record the gas concentration, and use it to calculate the ventilation rate. The tracer gas attenuation method is to release a certain amount of tracer gas into the test space. After t...

Claims

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Application Information

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IPC IPC(8): G01F1/00G01N33/00
Inventor 孙越霞侯静
Owner TIANJIN UNIV
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