Three-region oxygen consumption method-based ventilation restricted space heat release rate measurement method

Abstract

The invention relates to a three-region oxygen consumption method-based ventilation restricted space heat release rate measurement method, which comprises the following steps: S1, selecting an indoorflue gas measurement point, and arranging three flue gas analyzer probes in each of upper, middle and lower layer regions of a combustion space based on three layers of flue gas subregions, wherein the flue gas analyzer measures the concentrations of carbon monoxide and oxygen; S2, arranging a flue gas analyzer probe at each of an air inlet and a flue gas discharging port, wherein a flue gas analyzer measures the concentration of oxygen; S3, debugging the flue gas analyzers in Step I and Step II to guarantee simultaneous measurement; S4, processing data, and averaging the data measured by theflue gas analyzer in Step I; and S5, calculating a heat release rate of the combustion process based on an oxygen consumption principle. The method can directly measure and calculate the heat releaserate in the combustion process during a combustion test experiment; during calculation of the heat release rate, lagging of measured data is not required to be considered, so that the heat release rate can be measured conveniently and easily in real time.

Description

technical field [0001] The invention relates to a method for measuring the heat release rate in a ventilated restricted space, more specifically, to a method for measuring the heat released rate in a ventilated restricted space based on the three-zone oxygen consumption method. Background technique [0002] At present, the experimental determination of fire heat release rate is still one of the key issues in fire science. Common measurement methods and equipment include weight loss method, combustion smoke analysis method and cone calorimeter. The weight loss method is determined based on the mass loss rate of the fuel. The combustion efficiency is an estimated value when calculating, but in fact the combustion efficiency changes and is greatly affected by environmental factors; the cone calorimeter is used to measure the heat release rate on a small scale common method, but there are some differences between the measurement scene and the real fire scene; the combustion smok...

AI Technical Summary

Problems solved by technology

At present, the carbon dioxide gas concentration is measured by a single point, but due to the influence of thermal buoyancy and ventilation during combustion, the distribution of the smoke is not uniform, so the single point measurement is not reliable

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