KR20080033837A - System for testing and estimating fire property by burning of a test object in real fire - Google Patents

Abstract

A system for testing and analyzing combustion properties of a subject in case of fire is provided to accurately estimate size and development of an actual fire by analyzing the combustion properties of various subjects. A system for testing and analyzing combustion properties of a subject in case of fire includes a duct(10), a test device(100), a data processor(200), a smoke detector(300), and a computer(400). The duct collects and passes combustion gas generated during combustion of a subject through a predetermined path. The test device obtains two variables for calculating an HRR(Heat Release Rate) of the subject during combustion. The data processor measures the variables. The smoke detector detects an amount of an SPR(Smoke Production Rate) included in the combustion gas passing through the duct. The computer calculates the HRR based on measurement value inputted from the data processor.

Description

System for testing and estimating fire property by burning of a test object in real fire}

1 is a block diagram showing a combustion evaluation element measurement and analysis system of a test object during a fire in another embodiment of the present invention.

FIG. 2 is a schematic view showing a portion of the duct shown in FIG. 1;

3A is a cross-sectional view taken along the line II-II of FIG. 2.

3B is an enlarged view illustrating main parts of FIG. 3A;

3C is a cross-sectional view taken along line III-III of FIG. 3B.

4A is a cross-sectional view taken along the line IV-IV of FIG. 2.

Figure 4d is a view showing an extract of the flow rate probe support unit shown in Figure 4a.

Figure 5 is a schematic diagram showing a gas analyzer shown in FIG.

<Description of Symbols for Main Parts of Drawings>

10..duct 13. blower

100 .. Heat dissipation measuring device 110. Mass flow rate measuring device

111. Flow velocity probe 113. Differential pressure transducer

Gas analyzer 121.Sampling member

125..Gas Processor 127..Oxygen Analyzer

200. Data processing unit 300 Smoke detector

310..Light source 320..Photodetector

400.Computer

The present invention relates to a system for testing the combustion characteristics of a real object, and more particularly, to test the characteristics such as the heat release rate during combustion of materials used in flame retardant, flame retardant and fireproof products, the size, power generation and The present invention relates to a heat release rate and a fire evaluation factor measurement and analysis system according to the combustion of a test subject in a fire so that the prediction is possible, and thus, the fire prevention and response to building materials in case of fire is ensured.

In preventing any kind of fire, it is very important to know the characteristics of the fire that can occur in various situations. However, identifying the characteristics of these different fire situations is not easy.

In the past and in recent years, large and small fires have caused many damages to property and lives. A representative example is the Daegu subway fire accident that occurred in Korea. Many fire-related regulations have been tightened due to the occurrence of such large fire accidents, but it is still difficult to analyze the fire characteristics that occur in actual fires, and thus effective fire prevention and fire fighting activities have been limited.

In other words, the types of fire tests that are close to the previous reality do not deviate from the visual observation, but only depend on the size of the fire.

Therefore, in order to effectively prevent and cope with fire, it is necessary to know the characteristics of the actual fire in more detail.

In a simple example, fires can be divided into three main stages. The first stage of the fire is ignition, the second stage is combustion, and the third stage is the transition of fire. Elements of fire that can be identified in these three stages include: Ignition Time in the first stage, Oxygen Production Rate in the second stage, Heat Release Rate, and Smoke in the third stage. Smoke Production Rate.

Even with the elements of the fire characteristics identified in each stage as described above, it can be seen that the evaluation of the actual fire, which was measured only visually, is a very wrong method.

Therefore, the development of equipment to measure the amount of heat generated during the actual fire and other fire elements is very important, the need is urgently needed.

In particular, among the fire characteristics described above, the heat release rate (HRR) may be defined as 'heat energy released when the material is burned under prescribed conditions', and it is even more important to accurately measure the heat release rate. The reason is: First, the heat release rate (HRR) can be used to measure "how big a fire is" in a real fire, and secondly, most fire variables depend on the size of the fire, that is, the heat release rate. HRR is the "fluid force" that develops the fire, and the fourth heat release rate (HRR) creates a greater heat release rate (HRR), which is why the actual fire is predictable.

Therefore, the development of measuring equipment capable of measuring and predicting the heat release rate in fire grasp is further required.

The present invention has been made in view of the above, and an object of the present invention is to provide a combustion evaluation element measurement and analysis system of a fired test object, which is improved to easily and accurately measure and analyze combustion characteristics of fired objects. There is this.

In addition, the present invention can accurately measure the size, power generation and prediction of the actual fire during the fire by testing the characteristics such as heat release rate during the combustion of various real objects, and accordingly to prevent and cope with the fire according to the various fire objects and types It is an object of the present invention to provide a system for measuring and analyzing combustion evaluation elements of a test subject in a fire capable of analyzing necessary data.

In order to achieve the above object, a combustion evaluation element measurement and analysis system of a fire test object of the present invention includes: a duct for collecting and passing a combustion gas generated during combustion of a test object through a predetermined path; A measuring device for acquiring at least two variable values necessary for calculating a heat emission amount generated by combustion of the test object through the combustion gas passing through the duct; And a data processor configured to receive and measure the variable values measured by the measuring unit.

Here, it is preferable to further include a computer for calculating the heat emission amount based on the measured value input from the data processing unit.

In addition, the measuring device, the mass flow rate measuring device for measuring the mass flow rate of the combustion gas passing through the discharge duct; It is preferable to include a; gas analyzer for measuring the amount of oxygen by analyzing the combustion gas passing through the exhaust duct.

The mass flow rate measuring device may further include: a plurality of flow rate probes respectively detecting gas flow rates flowing through the openings in directions opposite to each other with respect to the combustion gas flow direction in the duct; It is preferable to include a; differential pressure converter for measuring the discharge rate of the combustion gas to obtain the flow rate pressure difference between both in accordance with the gas flow rate applied to the plurality of flow rate pro portion.

Each of the flow rate probes may include: an inlet parallel to a combustion gas flow direction in the duct and turned off in opposite directions; Orifice pipes connected to the inlet holes orthogonally to each other and connected to the differential pressure transducers, respectively.

The gas analyzer may further include: a sampling member installed in the duct to collect and sample a portion of the combustion gas passing through the duct; A gas processor for processing moisture and impurities contained in the combustion gas received through the sampling member; And an oxygen analyzer that receives the combustion gas treated through the gas processor and measures oxygen consumption.

In addition, the sampling member is coupled to the inner wall of the duct, one end of which is closed by a cap, is installed to cross the traveling direction of the combustion gas, a plurality of having a plurality of sampling holes for introducing a portion of the combustion gas A collecting pipe; A connector for connecting the open ends of each of the plurality of collecting pipes in one place; And a connection pipe connected to the connector and extending out of the duct to be connected to the gas processor.

In addition, each of the collecting pipes is coupled to the inner wall of the duct, and is connected in communication with the connector in the form of a crisscross (+) from the center of the duct, and the sampling hole is formed on the opposite side of the combustion gas flow. .

In addition, the sampling hole is preferably arranged such that the interval between the sampling holes is gradually narrowed from the center of the duct to the outer side.

The gas processor may further include a filter configured to filter soot of combustion gas sucked through the sampling member; A cold trap condensing water vapor contained in the combustion gas passing through the filter; A chamber for storing water vapor collected by the cold trap and discharging it to the outside; A suction pump connected to the chamber to suck combustion gas through the sampling member; A dryer for drying the combustion gas passing through the pump; And a carbon dioxide trap for removing carbon dioxide contained in the combustion gas passing through the dryer.

The gas analyzer may further include a non-oxygen gas analyzer for measuring the amount of carbon monoxide and carbon dioxide treated in the gas processor prior to the oxygen analysis.

In addition, it is preferable to further include a smoke measuring device for measuring the amount of smoke generated in the combustion gas passing through the duct.

In addition, the smoke measuring device, and a light source for irradiating laser light to pass through the duct; It is preferable that the light detector irradiated from the light source and passed through the duct, the light detector for measuring the smoke density according to the amount of light received.

The computer may further include a computer configured to receive measurement values input from the data processor and to measure, analyze, and display a heat emission rate of the combustion gas using a preset program and basic data of a test object input in advance.

In addition, the computer receives the orifice pressure difference ΔP and discharge velocity V generated from each of the plurality of flow velocity probes from the differential pressure transducer, and the mass flow rate m _{e in} the duct through Equation 1 below. ) Is good.

[Equation 1]

Here, ρ represents standard air density (kg / m 3).

In addition, the computer, after calculating the mass flow rate in the duct, it is good to calculate the heat release rate q (t) by the following equation (2).

[Equation 2]

는 유효 순연소율이고,

는 양론적 산소/연료질량비로서 상기

는 연소시 소모되는 산호 1kG 당 발생되는 에너지이고,

는 산소분석기 눈금의 초기값이고,

는 산소분석기의 눈금값이다.Where q (t) is the heat release rate,

Is the effective net burn rate,

Is the stoichiometric oxygen / fuel mass ratio

Is the energy generated per 1 kG of coral consumed during combustion,

Is the initial value of the oxygen analyzer scale,

Is the scale value of oxygen analyzer.

In addition, the computer may obtain the discharge speed (V) by the following equation (3).

[Equation 3]

Where ΔP is the orifice pressure difference, ρ is the standard air density (1.2045 kg / m 3), and Re is the Reynolds number.

In addition, it is preferable to further include a support unit installed in the duct to firmly support the orifice tube without shaking.

The support unit may further include: a probe support bar installed in the duct in a direction crossing the combustion gas moving direction; And a clamper coupled to the support bar for clamping the cucumber piece tube.

Hereinafter, a combustion evaluation element measurement and analysis system of a test object in a fire according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 1, a combustion evaluation element measurement and analysis system of a test object in a fire according to an embodiment of the present invention includes a duct 10 for collecting and passing a combustion gas generated during combustion of a test object through a predetermined path; Measuring device 100 for obtaining at least two or more variable values required to calculate the amount of heat released by the combustion of the test object through the combustion gas passing through the duct, and measured by the measuring device 100 On the basis of the measured values input from the data processor 200 for receiving and measuring the variable values, the smoke measuring device 300 for measuring the amount of smoke generated in the combustion gas passing through the duct 10 and the data processor 200. A computer 400 for calculating the amount of heat dissipation is provided.

The duct 10 is located at the upper portion of the combustion object 1, the hood 11 for introducing all the combustion gas, the horizontal duct 12 for collecting and moving the combustion gas introduced through the hood 11, and horizontal Installed at the rear end of the duct 12 may include a blower 13 to provide a blowing force for the inlet and discharge of the combustion gas. Adjacent to the hood 11, a plurality of mixing vanes 14 are arranged in a staggered manner with each other to effectively mix the incoming combustion gas. In addition, a plurality of horizontal vans 15 are arranged side by side in the horizontal duct 12 to guide the combustion gas to be stably moved at a constant flow rate without causing vortices. Although the stage or burner 2 on which the object 1 is placed is not illustrated in detail, the stage 1 or burner 2 may be provided to be adjustable up and down according to the size and height of the hood 11 and the combustion size of the object.

The measuring device 100 is a mass flow rate measuring instrument 110 for measuring the mass flow rate of the combustion gas passing through the duct 10, and a gas analyzer for measuring the amount of oxygen by analyzing the combustion gas passing through the duct 10 120.

2, 3A, 3B, and 3C, the mass flow rate measuring instrument 110 detects gas flow rates flowing through openings in directions opposite to each other with respect to the combustion gas flow direction in the duct 10, respectively. A plurality of flow rate probes 111 and a differential pressure transducer 113 for measuring the discharge rate of the combustion gas by obtaining the flow rate pressure difference of both in accordance with the gas flow rate applied to the plurality of flow rate probes 111.

Each of the flow rate probes 111 is parallel to the combustion gas flow direction in the duct 10, as shown in FIGS. 4A, 4B, 4C, and 4D, but is blocked by the partition wall 11c to each other. It is provided with an inlet (111a) open in the opposite direction, and orifice pipe (111b) connected in orthogonal communication to each of the inlet (111a) and connected to the differential pressure transducer (113), respectively.

The flow rate probe 111 is shown in Figure 4a, the inlet 11a is located in the upper and lower center position relative to the radial direction of the duct, it is disposed to be biased toward the wall surface for the center of the upper, lower, left and right.

In addition, the support unit 114 for supporting the flow rate probe 111 may be further provided. That is, the support unit for firmly fixing the flow rate probe 111 to prevent the flow rate probe 111 from being shaken by the flow of the combustion gas in the duct 12 so that the pressure difference due to the orifice can be accurately measured ( 114). The support unit 114 includes a support bar 115 installed in the duct 12 and a clamper 116 fixed to the support bar 115 to clamp the orifice tube 111b. The support bar 115 is in the form of a rod, and is fixed at both ends in a direction intersecting the combustion gas traveling direction at a position lower than a radius of the duct 12 in the duct 12. The clamper 116 is coupled to the support block 116a by interposing an orifice pipe 111b between the support block 116a and the support block 116a and the support block 116a coupled to the support bar 115 by welding. Has a clamping block 116b. The clamping block 116b is coupled to the support block 116a by screws 117 to fix the orifice tube 111b. In addition, a connecting member 111d (see FIG. 4B) for coupling the orifice tubes 111b to each other is connected to the orifice tube 111b by welding or the like.

The differential pressure converter 113 obtains the pressure difference ΔP between the pressures P1 and P2 at the respective inlets 111a and applies the obtained measured value to the data processing unit 200. The data processing unit 200 converts the applied pressure difference ΔP into a digital signal or the like and outputs the digital signal to the computer 400. The computer 400 may calculate the discharge velocity of the combustion gas passing through the duct 10 with the measured value of the input pressure difference ΔP.

2, 3A and 5, the gas analyzer 120 is installed in the duct 10 and the sampling member 121 for collecting and sampling a portion of the combustion gas passing through the duct 10 and , An oxygen analyzer for measuring oxygen consumption by receiving a gas processor 125 for processing moisture and impurities included in the combustion gas provided through the sampling member 121 and the combustion gas treated through the gas processor 125. 127 is provided.

The sampling member 121 is installed in the duct 10 to cross the traveling direction of the combustion gas, and has a plurality of sampling holes 122a for introducing a part of the combustion gas to the gas processor 125. It includes a plurality of collecting pipes 122 connected to. The collecting pipe 122 is in the form of a straight pipe, and a plurality of the collecting pipes 122 are connected in a crisscross (+) shape by the connecting connector 123 as shown in FIG. 3B. That is, each of the collecting pipes 122 is fixed to the engaging portion of the inner wall of the duct 12 with one end closed by a cap, and the open ends of the other ends are connected to the connector 123 and are in communication with each other. The connection pipe 124 is coupled to the discharge hole 123a provided at the center of the connector 123. The connecting pipe 124 is connected to the gas analyzer 113 through the duct 12.

In addition, a plurality of sampling holes 122a are provided along the length of the collecting pipe 122, and preferably, the sampling holes 122a are formed at opposite sides of the traveling direction of the combustion gas. That is, the sampling hole 122a is preferably formed on the opposite side of the smoke flow so as to prevent clogging due to soot. In addition, since the collecting pipe 122 is connected in the form of a cross, the combustion gas can be evenly sampled at various places in the duct 10, thereby reducing the sampling error due to the temperature difference. In addition, as illustrated in FIG. 3A, the sampling hole 122a may be formed such that the gap is gradually narrowed toward the inner wall of the duct 12, ie, the center of the duct 12, that is, the connector 123. In addition, four or more may be formed for each collecting pipe 122.

The gas processor 125 condenses the filter 21 for filtering soot of the combustion gas sucked through the sampling member 121 and the water vapor contained in the combustion gas passing through the filter 21. Cold trap 22 to be stored, the chamber 23 to store the water vapor collected by the cold trap 22 to discharge to the outside, and the combustion gas through the sampling member 121 connected to the chamber 23 A suction pump 24 for sucking gas, a dryer 25 for drying the combustion gas passing through the pump 24, and a carbon dioxide trap 26 for removing carbon dioxide contained in the combustion gas passing through the dryer 15. It includes. In addition, a separate bypass path 27 for removing impurities in the combustion gas between the filter 21 and the carbon dioxide trap 26 is further included, and a flow analyzer 28 for analyzing the flow state of the combustion gas is further provided. It may be provided. Since the gas analyzer including the oxygen analyzer 127 is vulnerable to moisture, a cold trap 22 using a vapor condensation phenomenon is provided.

In addition, one of the two methods for calculating the heat release rate generated from the specimen is to use only oxygen, and to use both oxygen, carbon dioxide and carbon monoxide. Therefore, when only oxygen is used, a carbon dioxide trap 26 is installed in the middle. do. 5 discloses an apparatus for obtaining a heat release rate using only oxygen.

More specifically, the filter 21 is for preventing the intrusion of soot, and the cold trap 22 is for removing most of the moisture contained in the combustion gas, the temperature of the combustion gas to 3 ℃ or less It is a vapor condenser (Refrigerator) to remove water by using steam condensation to lower.

In addition, a fine filter 29 may be provided at the inlet side of the oxygen analyzer 127 to filter out particles such as fine dust that may remain in the treated gas as described above.

In addition, a so-called non-oxygen gas analyzer 30 for additionally measuring and analyzing the amount of carbon dioxide and carbon monoxide generated in the previous stage of the carbon dioxide trap 26 may be further provided.

When the oxygen analyzer 127 measures the delay time and the response time according to the calibration procedure, the delay time (td) is an average value of at least three turn-on delays and turn-off delays, and it does not exceed 60 seconds. Can not be done. The response time is calculated as an average value of turn-on and turn-off experiments for measuring the time when the output of the oxygen analyzer changes from 10% to 90% of the final deviation, and the response time is preferably 12 seconds or less.

The oxygen analyzer 127 is a paramagnetic type (Paramagnetic type), the oxygen concentration range is about 0 to 25%, and is sensitive to the pressure of the flow, so it may be adjusted to minimize the flow rate change.

In FIG. 5, reference numeral 40 denotes a rotameter for detecting an amount of analyte gas passing through the oxygen analyzer 127. Reference numeral 50 denotes an optional branch connected to the inlet side of the gas processor 125, and represents an analyzer for analyzing gases other than coral, carbon dioxide, and carbon monoxide, such as hydrogen oxide.

The data processor 200 receives detection signals from the differential pressure converter 113, the gas analyzer 120, the photodetector 320, the temperature sensor 500, and the like, which are described below. It is configured to analyze and measure the flow rate. The data processor 200 may serve as a data logger, for example, to process and output input data.

The smoke measuring device 300 receives a light source 310 for irradiating a laser light to pass through the duct 10 and a light emitted from the light source and passed through the duct 10 to receive smoke according to the amount of light received. It includes a photodetector 320 for measuring the density. The light source 310 is a laser diode, and irradiates laser light of a predetermined wavelength to the photodetector 320 across the duct 10. The photo detector 320 receives the light irradiated from the light source 310, and measures the density and the amount of smoke passing through the duct 10 according to the amount of light received. In order to pass the light irradiated from the light source 310, a predetermined portion of the duct 10, that is, a portion where the light source 310 and the photo detector 320 are installed, may be open or a transparent window may be provided.

In addition, the temperature sensor 500 may be installed in the duct 10. The temperature sensor 500 may be provided at an end portion of the connection member 510 connected to the center of the duct 10 from the outside. The connection member 510 may be a pipe, and an end portion of the connection member 510 may be formed in an orifice structure capable of entering and exiting combustion gas, and may accommodate the temperature sensor 500. The temperature sensor 500 can obtain the absolute temperature Te of the gas.

The computer 400 receives the combustion gas-related data transmitted from the data processing unit 200 and uses the preset program and the basic data of the test object input in advance, and the oxygen consumption amount, smoke generation amount, temperature, and flow rate of the combustion gas. It is configured to measure, analyze, and display the back.

As an example, the computer 400 receives measurement values input from the data processor 200 to calculate a heat release rate q (t) of the combustion gas using a preset program and basic data of a test object input in advance.

Prior to obtaining the heat release rate, the computer 400 provides an orifice pressure difference ΔP and a discharge speed V generated from each of the plurality of flow velocity probes 111 from the differential pressure transducer 113. To obtain the mass flow rate (m _e ) in the duct 10 through the following equation (1).

Here, ρ represents standard air density (kg / m 3).

After obtaining the mass flow rate m _{e in the} duct 10 through Equation 1, the computer 400 can calculate the heat release rate q (t) by Equation 2 below.

는 유효 순연소율이고,

는 양론적 산소/연료질량비로서 상기

는 연소시 소모되는 산호 1kG 당 발생되는 에너지이고,

는 산소분석기 눈금의 초기값이고,

는 산소분석기의 눈금값이다.Where q (t) is the heat release rate,

Is the effective net burn rate,

Is the stoichiometric oxygen / fuel mass ratio

Is the energy generated per 1 kG of coral consumed during combustion,

Is the initial value of the oxygen analyzer scale,

Is the scale value of oxygen analyzer.

On the other hand, the computer 400 may first obtain the mass flow rate (V) through the following equation (3) prior to obtaining the mass flow rate (m _e ) through the equation (1).

Where ΔP is the pressure difference between the orifices P1 and P2, ρ is the standard air density (1.2045 kg / m 3), and Re is the Reynolds number.

On the other hand, in the case of the calibration burner for burning the test object in the embodiment of the present invention, methane has an effective combustion heat of about 50MJ / kg, accordingly, it is preferable to manufacture and use a methane calibration burner of about 1MW.

In addition, one thing to watch out for when burning the test object is smoke plume, and if all burned smoke is not collected by the hood, the heat release rate (HRR) cannot be accurate, and thus, at least 12 m in diameter. Since it is difficult to move the hood 11, if the smoke diffusion range of each test object is calculated, a lift can be applied to the test object to adjust the height to minimize the lost smoke, thereby obtaining accurate experimental data. It is preferable.

In the case of the combustion evaluation element measurement and analysis system of the test object according to the embodiment of the present invention described above, it is a device corresponding to a large scale calorimeter or an industry calorimeter, and does not test a certain test material, but may occur in an actual industry. A large piece of equipment that measures and analyzes fire characteristics by directly burning a real test object, such as a fire, for example, an office-wide fire, a furniture fire, a car fire, or a train fire.

According to the present invention as described above, it is possible to provide a heat release rate measurement and analysis system having a simple and excellent performance that can easily and accurately test the combustion characteristics of various objects in the event of fire.

In addition, as the actual object is directly burned and tested, the size, power generation, and prediction of the actual fire can be accurately corrected in case of fire, and thus, there is an advantage that the fire prevention and response according to the building material can be ensured.

* In addition, there is an advantage that can be prepared by more specifically predicting fire prevention and fire protection measures for buildings or objects.

While specific embodiments of the present invention have been described and illustrated above, it will be apparent that the present invention may be embodied in various modifications by those skilled in the art. Such modified embodiments should not be understood individually from the technical spirit or the front of the present invention, but should fall within the claims appended to the present invention.

Claims (12)

A duct for collecting and passing a combustion gas generated during combustion of the test object through a predetermined path; In order to measure the mass flow rate of the combustion gas passing through the duct, a plurality of flow velocity probes and the plurality of flow velocity probes for detecting the gas flow rate flowing through the inlet openings opened in the opposite direction to the combustion gas flow direction in the duct, respectively. It includes a mass flow rate measuring device including a differential pressure transducer for measuring the discharge rate of the combustion gas by calculating the flow rate pressure difference of both sides according to the gas flow rate, and a gas analyzer for measuring the amount of oxygen by analyzing the combustion gas passing through the duct And the flow rate probe comprises an orifice tube communicating perpendicularly to each of the inlets and connected to the differential pressure transducers, respectively; A data processor configured to receive and measure measured values including the gas flow rate, flow pressure difference, and discharge rate measured by the measuring device; And And a computer configured to calculate the heat dissipation amount based on the measured value input from the data processing unit. The computer, The mass flow velocity (m _e ) in the duct is obtained by receiving the orifice pressure difference (ΔP) and the discharge velocity (V) generated from each of the plurality of flow velocity probes from the differential pressure transducer. A system for measuring and analyzing the combustion evaluation elements of a test subject during a fire. [Equation 1]

Here, ρ represents standard air density (kg / m 3). The method of claim 1, wherein the computer, After evaluating the mass flow rate in the duct to calculate the heat release rate q (t) by the following equation (2) combustion evaluation element measurement and analysis system of the test object in the fire. [Equation 2]

Where q (t) is the heat release rate,

Is the effective net burn rate,

Is the stoichiometric oxygen / fuel mass ratio

Is the energy generated per 1 kG of coral consumed during combustion,

Is the initial value of the oxygen analyzer scale,

Is the scale of the oxygen analyzer. The method of claim 1, wherein the computer, Combustion evaluation element measurement and analysis system of the test object in the fire, characterized in that to obtain the discharge rate (V) by the following equation (3). [Equation 3]

Where ΔP is the orifice pressure difference, ρ is the standard air density (1.2045 kg / m 3), and Re is the Reynolds number. The gas analyzer of claim 1, A sampling member installed in the duct to collect and sample a portion of the combustion gas passing through the duct; A gas processor for processing moisture and impurities contained in the combustion gas received through the sampling member; And Combustion evaluation element measurement and analysis system of a test object during a fire, characterized in that it comprises a; oxygen analyzer for measuring the oxygen consumption by receiving the combustion gas treated through the gas processor. The method of claim 4, wherein the sampling member, A plurality of collecting pipes, one end of which is coupled to the inner wall of the duct with the cap closed and installed in the traveling direction of the combustion gas and having a plurality of sampling holes for introducing a part of the combustion gas; A connector for connecting the open ends of each of the plurality of collecting pipes in communication with one place; And a connecting pipe connected to the connector and extending out of the duct to be connected to the gas processor. The method of claim 5, wherein the collecting pipe, Each of which is coupled to the inner wall of the duct, and is connected in communication with the connector at the center of the duct in the form of a cross (+), wherein the sampling hole is formed on the opposite side of the combustion gas flow. Combustion Evaluation Factor Measurement and Analysis System. The method of claim 6, wherein the sampling hole, Combustion evaluation element measurement and analysis system of the test object in the fire, characterized in that arranged in such a way that the interval between the sampling hole is gradually narrowed toward the outer side from the center of the duct. The method of claim 4, wherein the gas processor, A filter for filtering soot in the combustion gas sucked through the sampling member; A cold trap condensing water vapor contained in the combustion gas passing through the filter; A chamber for storing water vapor collected by the cold trap and discharging it to the outside; A suction pump connected to the chamber to suck combustion gas through the sampling member; A dryer for drying the combustion gas passing through the pump; And And a carbon dioxide trap for removing carbon dioxide contained in the combustion gas passing through the dryer. The method of claim 8, wherein the gas analyzer, And a non-oxygen gas analyzer for measuring generation amounts of carbon monoxide and carbon dioxide treated in the gas processor prior to the oxygen analysis. The method of claim 1, And a smoke measuring device for measuring the amount of smoke generated in the combustion gas passing through the duct. The method of claim 10, wherein the smoke detector, A light source for irradiating laser light to pass through the duct; And a light detector configured to receive light emitted from the light source and passing through the duct, and measure smoke density according to the amount of received light. The method of claim 1, Installed in the duct so that the orifice tube is supported, And a support unit including a probe support bar installed in the duct in a direction crossing the combustion gas movement direction, and a clamper coupled to the support bar to clamp the orifice tube. Combustion evaluation component measurement system of the object.

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