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燃气泄漏及其危害性的研究是有效降低和控制燃气事故的前提和基础。本文根据用户室内燃气的实际情况,讨论了室内燃气泄漏率的计算模型。首先以热环境和风压区的不同分析了房间自然通风计算模型,而后在此基础上,建立了不同泄漏率和自然通风条件下的室内燃气泄漏浓度变化规律通用计算模型,最后以重庆市气象条件为基础,模拟分析了不同季节、月份和房间所处不同风压区条件下的燃气泄漏浓度随时间的变化规律。本文的研究成果可为控制和降低室内燃气泄漏爆炸及中毒事故的发生提供有效的技术参考,以保证居民安全用气。
Research on gas leakage and its harmfulness is the premise and basis for effectively reducing and controlling gas accidents. Based on the actual situation of indoor gas, this paper discusses the calculation model of indoor gas leakage rate. Firstly, the natural ventilation calculation model of the room was analyzed based on the difference of the thermal environment and the wind pressure zone. Based on this, a general calculation model of indoor gas leakage concentration under different leakage rates and natural ventilation conditions was established. Finally, taking Chongqing meteorological conditions As the basis, the variation law of gas leakage concentration over time under different wind pressure zones in different seasons, months and rooms was simulated and analyzed. The research results of this paper can provide an effective technical reference for controlling and reducing indoor gas leakage, explosion and poisoning accidents so as to ensure residents’ safe use of gas.