燃气输配管网结构分析的指标与分析技术

燃气输配管网的压力级制、管网型式、阀门配置和管径配置等是管网结构的内容。从管网结构的角度分析输配管网称为输配管网结构分析。列举了燃气输配管网结构分析的特性指标体系,指出结构分析的主要技术方法。     

城市燃气管网的评估价值与自然垄断

在城市燃气企业产权多元化的过程中，对城市燃气管网价值的评估出现了许多不同的观点。分析燃气输配行业的自然垄断特点，得出自然垄断对城市燃气管网评估价值的影响。     

浅析城市燃气中压配气管网调压室最佳作用半径

在城市燃气多级管网系统中,存在一个调压室的最佳作用半径,这时管网系统的年计算费用为最小。本文根据对中压配气的供气方式的城市燃气输配系统的技术经济分析,得出中压燃气管网调压室的最佳作用半径     

南方某城市燃气热电厂天然气供应可行性分析

介绍了南方某城市目前天然气管网的运行情况及存在问题,分析了新建燃气热电厂后对燃气输配管网系统运行的影响.通过对燃气热电厂运行后的水力工况进行模拟分析,认为建设燃气热电厂是可行的.     

基于故障树方法的输配管网燃气泄漏风险决策

城市燃气输配管网是一个复杂的系统,存在着很多安全隐患,其中以燃气泄漏事故的危害最大,采用故障树方法对城市燃气输配管网的燃气泄漏事件进行风险评价。在评价基础上进一步进行风险决策,并且提出预防城市燃气输配管网泄漏事故的合理措施。     

城市燃气输配系统安全管理

本文通过对天津市城市燃气管网现状、管网腐蚀等因素分析，提出加强城市燃气输配管网安全运行必须抓好几个关键环节。     

锅炉用调压器稳定性解决方案探讨

调压器是燃气输配供应系统的主要设备,它的稳定性关系到燃气管网的安全,通过对调压系统的模拟工况实验,找到影响调压器稳定性的主要因素,得出初步解决方案,分析并得出增加管容、设置一定数量的放散阀、调节锅炉的PLC系统是三种有效的方法。     

钢骨架塑料管在城市燃气输配管网中的应用

通过对塑料管和钢骨架塑料管的技术、经济比较,分析塑料管在城市燃气输配管网中使用存在的缺点,介绍一种新型的管材——钢骨架塑料管的构造及其使用优点,推介它在城市燃气输配管网中的应用。     

城市燃气中压供气输配系统压力级制的浅析

根据对中压供气方式的城市燃气输配系统中压管网压力级制的技术经济分析,得出较为经济合理的压力值。     

燃气输配管网隐患排查与分级管理

随着城镇燃气的大发展,燃气输配管网逐渐从“青壮年”步入“中老年”。2021年湖北十堰重大燃气事故,更将城镇燃气安全推上了社会关注的风口浪尖。由于工艺迭代、管龄增长、政策变化以及人民对于用气安全日益增长的期盼,对燃气输配管网的隐患排查与分级管理已经刻不容缓。研究确定影响燃气输配管网的隐患项目,制定合理的评价方法对其进行量化分级,相应制定不同的控制措施,可以提升隐患排查治理的效果,减少管网事故的发生。     

铝塑复合管外墙敷设问题的探讨

文章针对建筑物外墙铝塑复合管能不能敷设的问题,依据相关规范条文,结合燃气工程实践,对室内燃气管道系统和城镇燃气输配系统的关系、范围、界面进行了衔接与分析,对正确理解室内管道系统中铝塑复合管的设计及安装规范有一定的帮助。     

城镇燃气典型输配系统甲烷排放源识别及分类

借鉴国内外相关甲烷排放核算研究成果和实践经验,结合中国城镇燃气典型输配系统的工艺特点,进行甲烷排放源识别及分类研究。研究表明,城镇燃气典型输配系统从门站进站管道到用户燃气表之间的所有设施、设备、组件及连接处都存在甲烷排放的可能,按照排放类型分为逃逸排放和放散排放;按照设施类型分为埋地燃气管道排放、燃气厂站排放和终端用户排放。根据国内外文献调研,不同设施类型中的材料材质、设备类型是影响甲烷排放量的重要因素,因此将排放源细分为6个一级排放源,21个二级排放源,72个三级排放源,为城镇燃气典型输配系统排放清单编制奠定基础。     

城镇燃气典型输配系统甲烷排放源识别及分类

借鉴国内外相关甲烷排放核算研究成果和实践经验,结合中国城镇燃气典型输配系统的工艺特点,进行甲烷排放源识别及分类研究。研究表明,城镇燃气典型输配系统从门站进站管道到用户燃气表之间的所有设施、设备、组件及连接处都存在甲烷排放的可能,按照排放类型分为逃逸排放和放散排放;按照设施类型分为埋地燃气管道排放、燃气厂站排放和终端用户排放。根据国内外文献调研,不同设施类型中的材料材质、设备类型是影响甲烷排放量的重要因素,因此将排放源细分为6个一级排放源,21个二级排放源,72个三级排放源,为城镇燃气典型输配系统排放清单编制奠定基础。     

Comparing China's city transportation and economic networks

The urban system has been a prevailing research issue in the fields of urban geography and regional economics. Not only do the relationships between cities in the city system exist in the form of rankings, but also in a more general network form. Previous work has examined the spatial structure of the urban system in terms of its separate industrial networks, such as in transportation and economic activity, but little has been done to compare different networks. To rectify this situation, this study analyzes and reveals the spatial structural features of China's urban system by comparing its transportation and economic urban networks, thus providing new avenues for research on China's city network. The results indicate that these two networks relate with each other by sharing structural equivalence with a basic diamond structure and a layered intercity structure decreasing outwards from the national centers. A decoupling effect also exists between them as the transportation network contributes to a balanced regional development, while the economic network promotes agglomeration economies. The law of economic development and the government both play important roles in the articulation between these two networks, and the gap between them can be shortened by related policy reforms and the improvement of the transportation network.     

城市燃气输配管网系统危机管理的研究

近年来频繁发生的城市燃气事故对居民生命财产安全造成巨大威胁.为保障城市燃气管网系统的安全运行,针对城市燃气输配管网系统的危机管理研究十分必要.基于此,本论文针对天津现役燃气管网系统实际情况,以城市燃气输配管网系统作为危机管理的研究对象,对其危机管理中的风险辨识、风险分析与评价、事故后果分析、预警及应急几个环节进行研究,以做到针对所发生的燃气事故进行有效的应急行动.达到控制事故的发展并最终消除的结果.     

城市燃气管网GIS系统设计

分析了城市燃气管网GIS系统的特征和功能,提出了系统设计思路及构成,以及在城市燃气地下管网管理、运行中的应用.     

西安市2007年冬季高峰供气运行分析

分析西安市2007年冬季高峰供气期间城市天然气输配系统运行情况，指出存在的问题，提出了解决问题的措施。     

Analysing utility tunnels and highway networks coordination dilemma

Utilities are an integral component of the total transportation network comprising highways, railways, airways, and waterways, as well as pipelines, wires, and cables that transport people, goods, and public services. The perennial dilemma of mutual interference between utility lines and transportation networks could be minimised making use of utility tunnel systems. Utilidors most striking feature is that they house several types of power, water, sewage, communications, gas and other statutory services in an easily accessible space. Placing utilities in tunnels under public rights-of-way reduces the continual cutting of pavements resulting from utility burial practices and facilitates the installation, inspection, replacement, and maintenance operations. Utility tunnels and transportation networks may not be compatible at transmission levels. Highway systems are generally planned to avoid high-density areas insofar as is possible. However, where the location of utility networks coincides sufficiently with the highway routes, the situation becomes more favourable to the utility tunnel concept. This paper discusses how compatibility of utility system networks with highway system networks could be greatly improved by appropriate attention to utilidor systems in urban planning. A sustainable approach to the dilemma of where to locate utilities in urban streets and highways has become urgent as the need for services expands in our modern cities. Interference between the safety and flow of highway traffic and utility tunnel operation could be a problem unless adequate measures are undertaken.