Method for testing and estimating 24-hour average ventilation in residential rooms

Abstract

The invention relates to a method for testing and estimating the average ventilation quantity of a residential room within 24 hours. Indoor and outdoor pressure difference is adjusted by an air blowerto create a plurality of working conditions, a room air infiltration calculation coefficient a and a corresponding characteristic index n are obtained by performing fitting in a method of measuring the airtightness by using a blasting door, then a pressure difference sensor is installed to measure an atmospheric pressure difference delta P at inside and outside the room, and a permeate air volumeQS of the room can be calculated when a window is closed; and when the window is opened, an effective ventilation area F of the window is measured by using the delta P measured by the pressure difference sensor and other sensing devices, the natural ventilation quantity QZ of the room is calculated when the window is opened, the infiltration ventilation quantity, the natural ventilation quantityof the residential room and respective corresponding time lengths are collected and are continuously monitored, accumulation is performed to figure out an average value, and then the average ventilation quantity of the residential room can be figured out. By adoption of the direct measurement method, the average ventilation quantity of the residential room within 24 hours is calculated, so as to evaluate the building environment. The operation process is simple and easy to implement, continuous test can be performed for a long time, and full-automatic operation is achieved.

Description

technical field [0001] The invention relates to a building environment evaluation technology, in particular to a method for testing and estimating the 24-hour average ventilation of a residential room. Background technique [0002] Ventilation is an important means to create comfortable indoor hygienic conditions. In residential buildings, because the ventilation volume cannot meet the requirements of the indoor characteristic index when the windows are closed, residents often use windows for ventilation in their daily life. Therefore, it is a basic problem that must be solved in the design and evaluation of ventilation in residential rooms to measure the ventilation of residential rooms by reasonable methods. The measurement methods of room ventilation are mainly divided into direct measurement method and indirect measurement method. In the current research, the indirect measurement method is mainly used, that is, the mass balance of the tracer gas is used for measurement. ...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problem that the traditional method is mostly indirect measurement, which causes the measurement process to be affected by various factors, and proposes a method for testing and estimating the average ventilation rate of a residential room, using a direct measurement method

Images