Multichannel parallel heat release rate test system and test method

Abstract

The invention discloses a multichannel parallel heat release rate test system and test method, and aims at providing a system and a test method for accurate calorimetric measurement of a fire disaster with large burning area and high heat release rate through a multichannel parallel mode. The test system comprises a combustor, a data acquisition unit, a data processor and a plurality of test units; each test unit comprises a smoke collection system, a smoke flow measuring system and a smoke sampling system, and the smoke collection system comprises a smoke discharge pipeline, a damping screen, a sampling section and a smoke discharge blower; the smoke flow measuring system comprises a bidirectional pitot tube, a differential pressure transducer and a thermocouple; the smoke sampling system comprises a smoke sampling pipe, a condenser, a smoke filter, a drying device, a sampling pump, a rotor flow meter, an oxygen sensor, a CO2 sensor and a CO sensor; and the smoke discharge pipelines in the test units are connected in parallel. The multichannel parallel heat release rate test system and the test method, provided by the invention, can be used for testing the heat release rate of a tunnel fire disaster, and also can be used for testing the heat release rates of fire disasters of automobiles and trains.

Description

technical field [0001] The invention relates to a heat release rate test system, more specifically, to a multi-channel parallel heat release rate test system and a test method for measuring the heat release rate of a high-power fire source. Background technique [0002] The heat release rate is the heat released per unit time when combustibles burn. For a long time, the heat release rate has been regarded as the most important parameter to reflect the fire scene and characterize the fire process. Through different forms of experiments, people have developed a variety of methods to measure the heat release rate. At present, the widely accepted measurement methods are mainly the weightlessness method and the oxygen consumption method, and the oxygen consumption method is the mainstream method for fire research. [0003] The oxygen consumption method means that the net heat of combustion is proportional to the mass of oxygen consumed by combustion. This relationship is that th...

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Problems solved by technology

[0005] At present, the systems designed for the research of heat release rate are basically aimed at combustion objects with a small area. The flue gas flow rate is limited, and a single exhaust pipe is limited by space and size, so the flue gas cannot be completely collected by the exhaust pipe, which will make the measurement results inaccurate

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