煤气与热力2024，Vol.44Issue(8)：后插20-后插24,5.
城镇居民用户天然气异常流量识别
Identification of Abnormal Natural Gas Flow Rates for Urban Residential Users
刘兴伟 1黄建安 2陈婷婷 1王凡 1王铁强 1柴家凤 2孙俊芳 1沃龙1
作者信息
- 1. 北京市燃气集团研究院,北京 100011||北京市燃气集团有限责任公司,北京 100035
- 2. 北京市燃气集团有限责任公司,北京 100035
- 折叠
摘要
Abstract
The abnormal flow rate of indoor nat-ural gas leakage is analyzed,and the calculation model for gas leakage time is established by combining the flow rate of gas leakage,the volume of the users room and the air exchange rate.A testing platform is built to analyze the flow rate changes when the front and rear ends of the rubber hose are detached under different gas supply pressures,and provide implementation strat-egies for identifying abnormal flow rates.When evalua-ting the time to reach the lower explosive limit after gas leakage,it is necessary to consider the gas leakage flow,the air exchange rate of room and the room vol-ume.The hose detachment at different positions and the flow rates of hose detachment both increase with the increase of gas supply pressure.Under the same gas supply pressure conditions,the flow rate of hose de-tachment at the front end is greater than that at the rear end.The cut-off value is set at 1.2 times the maximum flow rate of the gas meter,which has many omissions.Different abnormal flow identification strategies are a-dopted based on whether the intelligent gas meter has a pressure monitoring module and the user's gas supply pressure.When the intelligent gas meter has pressure monitoring function,the cut-off value can be calculated through the relationship between flow rate and pres-sure.When the intelligent gas meter does not have pressure monitoring function,it is recommended to set the cut-off value to 1.1 times the rated maximum load flow rate of the user's gas appliances,and set the self-closing valve to operate when the pressure is less than or equal to 1 kPa to cut off the gas supply.关键词
异常流量/换气次数/胶管脱落/燃气泄漏流量Key words
abnormal flow rate/air exchange rate/detachment of rubber hose/flow rate of gas leak-age分类
建筑与水利引用本文复制引用
刘兴伟,黄建安,陈婷婷,王凡,王铁强,柴家凤,孙俊芳,沃龙..城镇居民用户天然气异常流量识别[J].煤气与热力,2024,44(8):后插20-后插24,5.
