Numerical simulation study on response temperature of temperature detectors for building using decentralized fire

doi:10.16265/j.cnki.issn1003-3033.2018.03.010

Abstract

Abstract: The paper was aimed at finding out the value of the temperature response of the temperature detector fixed on the ceiling of a building using decentralized fire, and providing a reference for the selection and setting of the temperature detector in a building using decentralized fire. A model of the building using decentralized fire was created by PyroSim software. 15 numerical simulations were carried out at the HRR of 1, 5, 10, 20, 30 kW/m² and the ceiling height of 3, 5, 7 m, the data monitored by the thermocouples in the model are processed, analyzed and fitted. Finally, after considering the maximum temperature in a building and the safety temperature, a formula was worked out for calculating the alarm temperature for the detector in decentralized fire building. The results show that there is a uniform temperature distribution in the ceiling plane of a building using decentralized fire, and there is a obvious quadratic function relation between the temperature and the HRR, that there is a negative correlation between the temperature in the ceiling plane and the ceiling height, and that the temperature variation decreases with the decrease of the HRR at the same height difference.

Key words: decentralized fire, heat release rate(HRR), temperature detector, temperature response, PyroSim software, numerical simulation

CLC Number:

X932

TIAN Shuicheng, ZHANG Chengzhen. Numerical simulation study on response temperature of temperature detectors for building using decentralized fire[J]. China Safety Science Journal, 2018, 28(3): 56-61.

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