城市集中供热优化运行及节能措施研究

发布时间：2018-05-04 05:44

本文选题：集中供热 + 多热源联网　；参考：《华北电力大学》2017年硕士论文

【摘要】：近几年,随着环境污染问题的日益突出,城市集中供热越来越受到人们的关注和普遍应用。集中供热是一个多变量、长时滞、非线性的复杂系统,主要包括两个过程,即供暖热源供热量的输出和热网热量的合理分配。传统上,对热源和热网的控制多为分散控制,不能实时、准确和全面地对热源及热网的运作情况进行综合分析,导致在实际的供热运行过程中产生了许多问题,比如供热量不足、热量分配不均、集中管理自动化水平低以及能源浪费严重等,这一定程度上限制了集中供热的发展。本文针对以上问题,基于B市集中供热现状和面临的问题,通过探讨多热源联网运行、分布式变频系统以及供热计量技术的应用推进城市集中供热优化运行与节能,以大力促进城市集中供热发展。首先,多热源联网运行的水力和热力过程相当复杂,运行调度的难度更是成倍增加。对于多热源的热网,需针对多热源联网运行的水力过程、热负荷变化、热源调度等方面进行研究和分析,优化运行,实现稳定供暖。其次,通过分布式变频供热系统的研究及应用,对于已建系统,在不增加新的热源和不扩大既有热网规模的前提下,利于在优化供热效果、节约能源、降低运行费用、适应热负荷变化等方面进行改观;对于新建项目,在设计、建设完善的节能供热系统方面有参考价值,对推动热计量改造的顺利进行具有重要意义。第三,基于普遍采取按面积计算热费的方式,已经阻碍了城市供热行业的发展,同时表现出管理效率低、浪费能源、社会效益差等问题。因此应用以“预付费”为突出特点的热量表的呼声越来越高。分户计量供热系统可以通过设置热量表和温控阀使热源供热能力满足居民的需求,居民根据需要进行调节供热,达到提高供暖质量的目的,是我国目前的经济水平和供暖现状需要大力推广的计量收费方式,更加有利于热用户按需求使用、合理使用,促进能源节约,实现科学化管理,具有良好的社会效益和经济效益。
[Abstract]:In recent years, with the increasingly prominent environmental pollution problems, urban central heating is becoming more and more popular and widely used. Central heating is a multivariable, long time, nonlinear complex system, mainly including two processes, that is, heating heat supply output and heat network heat distribution. Traditionally, heat source and heat network are used. Most of the control is decentralized control, which can not be real-time, accurate and comprehensive analysis of the operation of heat source and heat network, resulting in many problems in the actual heating process, such as insufficient heat supply, uneven heat distribution, low level of centralized management automation and serious waste of energy, which is limited to a certain extent. The development of central heating. Based on the above problems, based on the current situation of central heating in B city and the problems faced, this paper discusses the operation of multi heat source network, the distributed frequency conversion system and the application of heating metering technology to promote the optimal operation and energy saving of urban central heating, so as to promote the development of urban central heating. First, multi heat source network operation is carried out. The hydraulic and thermal process is quite complex, and the difficulty of operation and scheduling is multiplied. For the heat network with multi heat sources, it is necessary to study and analyze the hydraulic process of the multi heat source network, the change of heat load, the heat source scheduling and so on, and optimize the operation to realize the stable heating. Secondly, the research and application of the distributed frequency conversion heating system should be carried out. On the premise of not increasing the new heat source and not expanding the size of the existing heat network, the built system is beneficial to optimize the heating effect, save energy, reduce the running cost and adapt to the change of heat load. It has a reference value for the new project, in the design and construction of a perfect energy saving heat supply system, and for the promotion of thermal measurement transformation. Third, based on the common use of area calculation of heat cost, it has hindered the development of urban heating industry, at the same time showing low management efficiency, waste of energy and poor social benefits. Therefore, the application of "prepaid" as a prominent characteristic of the heat meter is becoming higher and higher. By setting heat meter and temperature control valve, the heat supply capacity of the heat source can meet the needs of the residents. The residents can adjust heating according to the needs to improve the heating quality. The current economic level and heating status of our country need to be popularized in the current situation, which is more conducive to the use of hot users, rational use and promotion. Energy saving and scientific management have good social and economic benefits.

【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU995

【参考文献】