Dynamic measurement methods of room ventilation and air exchange quantity

A technology for dynamic measurement and ventilation volume, applied in the field of building indoor environment, can solve the problems of inability to measure the ventilation volume of the room, interfere with the living and rest of the occupants, etc., to improve the implementation and operability, fast operability, Effective and reliable technical means

Active Publication Date: 2018-08-24
BEIJING UNIV OF TECH
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  • Abstract
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Problems solved by technology

Therefore, the tracer gas method will not be able to make accurate measurements of dynamically changing room ventilation
On the other hand, when the tracer gas method is used to measure room ventilation, the measurer needs to bring special instruments into the resident room and release the tracer gas into the room, which will seriously interfere with the movement of people in the room. It is difficult to implement the normal life routine of the occupants

Method used

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  • Dynamic measurement methods of room ventilation and air exchange quantity
  • Dynamic measurement methods of room ventilation and air exchange quantity
  • Dynamic measurement methods of room ventilation and air exchange quantity

Examples

Experimental program
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Embodiment 1

[0062] Take the bedroom of a residence in Beijing as the object of description for the application of the method of the present invention. This bedroom is a single bedroom for an adult man, and the volume of the bedroom room is 34m 3 , the status of the adult man's stay in the bedroom is obtained through a questionnaire survey. All-day indoor and outdoor CO2 was carried out in the bedroom 2 Concentration test, the test time interval is 10min. During the test, the inner door of the room was closed, and the opening and closing of the outer window of the room was completely determined by the man according to his own hot and cold preferences and air quality requirements.

[0063] For this research object, combined with the Figure 7 , illustrate that the concrete application train of thought of the present invention and application step are as follows:

[0064] 1. CO inside and outside the room 2 Concentration testing and related data collection

[0065] (a) Place a self-rec...

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Abstract

The invention discloses a dynamic measurement method of room ventilation and air exchange quantity. A measurement manner of using CO2 emitted by human bodies as tracer gas is adopted, a mutual relationship of room CO2 concentration and the room ventilation and air exchange quantity is established according to a basic principle of mass balancing, and at the same time, the dynamically changing roomventilation and air exchange quantity is calculated and determined on the basis of an error analysis result according to continuous test data of the room CO2 concentration. By adopting the technical solution of the invention, all limits on emission status of room human-body CO2 can be removed, the room ventilation and air exchange quantity in each time interval can be conveniently and quickly calculated and obtained on the basis of the actually measured data of the room CO2 concentration, and thus dynamic changes of the room ventilation and air exchange quantity can be truly reflected.

Description

technical field [0001] The invention belongs to the technical field of building indoor environment, and relates to a dynamic measurement method of room ventilation volume. Background technique [0002] The measurement of the ventilation volume of residential buildings under natural ventilation is of great significance for the prediction and analysis of residential heating and air conditioning energy consumption and indoor air quality. At present, the tracer gas method is usually used at home and abroad to measure the ventilation volume. This method uses methane, SF 6 or CO 2 etc. as the tracer gas, the tracer gas is released in the way of ascending method and descending method, according to the CO 2 The change of gas concentration can be analyzed and calculated to obtain the ventilation volume of the room. Among them, the ascending method refers to the continuous release of tracer gas with a fixed intensity source at the release point, and records the change process of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 简毅文刘晓霄王旭郭锐敏侯雨晨
Owner BEIJING UNIV OF TECH
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