FEATURE

• The Single Burning Item (SBI) consists of a trolley, a fixed frame, a gas collecting hood, collector, J type exhaust pipe, centrifugal fan, wind speed control device, the comprehensive measurement section, gas analysis cabinet, data acquisition system;

• ​The trolley can be installed with two vertical sample specimens. The bottom of the vertical angle is a sand box burner. The surface ignition method is adopted, and the flame detection system is equipped as a flameout protection device;

• ​The fixed frame support the gas collecting hood. The frame is fixed with an auxiliary burner and equipped with a flame detecting system as a flameout protection device;

• ​Stainless steel gas collector, located at the top of the fixed frame, used to collect combustion gases;

• ​Stainless steel J type smoke exhaust pipe, the inner diameter is (315 + 5) mm with 50mm high temperature resistant mineral cotton insulation;

• ​The smoke exhaust system shall continuously exhaust smoke at the speed of 0.50m3/s-0.65 m3/s, and be regulated by frequency conversion;

• ​Mass flow controller, measuring range of 0g/s-2.5g/s, reading accuracy of not less than 1.5%;

• ​Gas supply can be automatically controlled to flow rate of 647mg/s and 2000mg/s, the gas control system can guarantee the speed of gas supply in the process of test changes should not exceed 5mg/s, to ensure the heat output of 30.7 + 2kW;

• ​The flue gas sampling system consists of an ash filter, a cold trap, two drying columns, a sampling pump and a peristaltic pump, so as to effectively make sample gas clean and dry;

• ​Paramagnetic oxygen analyzer, measuring range of 0-25%, measuring oxygen concentration in the gas, the concentration range of 0-25%, T90<12 seconds; Non dispersive infrared CO2 analyzer: CO2:0 ~ 10%;

• ​A pipeline with a length of 2155mm, equipped with a pressure probe, three thermocouples, a gas sampling probe, and a white light system;

• ​Two-way probe, with the range of at least (0-100) Pa and accuracy of 2Pa inlet pressure sensor connected. The response time of the pressure sensor 90% output is at most 1s;

• ​The light system is incandescent type, with (2900 + 100) K color temperature,and the flexible joint is installed on the side of the exhaust pipe;

• Silicon photodiode detector, with 0.1% linear stability;

• The air is introduced into the side tube to maintain the cleanliness of the optical device, which can be accomplished by compressed air;

Software Feature

Provide the following calibration and operation interface:

• ​O2/CO2 analyzer calibration: O2/CO2 output noise and drift calibration

• ​Calibration of optical systems: noise and drift calibration of smoke measurement systems

• ​Optical system calibration: filter calibration

• ​Air volume calibration: air volume control range calibration

• ​Ladder calibration and heptane calibration

Heat output ladder calibration meet the following requirements:

• The delay time of the O2/CO2 analyzer is not more than 30s;

• The response time of the O2/CO2 analyzer is not more than 12s;

• The response time of the burner switch is not more than 12s;

• The temperature response time shall not exceed 6s;

• The ratio Q gas 30s (T) /HRR30s (T), (T) should be continuous (100 + 5)%;

• The difference between the average of HRR step 2 and the average of HRR step 3 is not more than 0.5kW.

Heptane calibration results:

• ​The calorific value of unit mass heptane should be THR/m (4456 + 222.8) MJ/kg;

Testing results:

Average rate of heat release[RHRav(t)]
Total Heat Release[THR(t)]
1000 * [RHRav(t)/(t-300)]
Fire Growth Rate Index[FIGRA]
Total Heat Release[THR600s]
Occurrence of Lateral Flame Spread
RSPav(t)
Total Smoke Production[TSP(t)]
10000 * [RSPav(t)/(t-300)]
Smoke Growth Rate Index[SMOGRA]
Total Smoke Production[TSP600s]

Photos of EN13823 Single Burning Items SBI