基于实际参数的集中供热系统二次网运行调节

研究了集中供热系统的运行调节问题,根据集中供热系统热平衡方程,考虑循环水流量、散热器散热面积、室内温度等参数,建立了集中供热系统二次网的运行调节数学模型。将该模型应用到某个集中供热系统中,分析了循环水流量、散热器散热面积、室内温度对供热参数的影响。结果表明,该数学模型反映了集中供热系统的实际特点,能够更加科学合理地指导集中供热系统的运行调节。     

4×70MW热水锅炉在沈阳站集中供热中的应用

简要介绍了沈阳站集中供热工程的建设背景及建设规模,结合集中供热的优点,具体阐述了沈阳站集中供热系统的组成和特点,并列举了该供热系统的经济效益,指出集中供热利国利民,值得推广。     

计算机远程测控在集中供热系统中的应用

计算机监控技术应用在集中供热系统中是供热节能和智能化发展的必然趋势。本文结合邢台市供热监控实例介绍了集中供热监控技术的硬件组成、组件功能、控制策略及采用该系统给集中供热所带来的有益改变,同时对应用监控系统的实际节能效果进行了分析。     

集中供热量化管理节能服务平台

我国集中供热系统的能耗高,增长快,节能潜力大。针对这一现状,本文提出了一项集中供热系统综合节能技术:"集中供热量化管理综合节能技术服务平台",并对该技术的主要功能、技术特点和应用效果进行了介绍。     

集中供热系统的监测与控制

分析了当前我国集中供热的现状及其将来的发展趋势,介绍了集中供热系统的监测与控制系统,并研究了该系统所具有的节约能源、减少环境污染、改善人民生活质量、便于用户调节控制热能等方面的优点。     

基于DCS的换热站智慧供热监控系统的研究

本文介绍了基于分布式控制系统的换热站智慧集中供热监控系统.该系统能够采集各个换热站中设备状态和管网监测点的数据,并通过数据分析控制设备运行,使用户末端温度维持在最佳状态.本文从软硬件方面详细介绍了系统组成,并且分别从物理架构和层级架构方面分析了该系统的功能,它具有智能化控制,无人值守和管网平衡与供热质量反馈的功能.通过供热管理平台,运维人员能够直观地掌握所监测设备和管网的状态.同时,该系统具有集中管理、分级监控、针对性强、操作灵活的特点,能够满足居民小区集中供热的智能化需求,实现智慧集中供热,达到节能降耗的目的.     

浅谈集中供热参数对供热系统的影响

集中供热系统中供热参数是影响工程投资的主要因素,直接影响系统的技术可行性和经济合理性,须合理确定.以铁岭市银北集中供热系统为例,阐述了该热网的系统配置情况及其经济性分析.     

以热电厂为热源的集中供热系统集成节能技术研究

该集中供热系统集成了低温循环水废热利用、汽轮机驱动循环水泵、混水供热和管网自动化调控系列节能技术.详细阐述了每一分项技术的原理、应用和效果.分析表明该集成节能技术适用于热电联产集中供热系统,并能获得较大的节能效果.     

集中供热系统中热网的电气自动控制探究

集中供热已经成为冬季采暖中所占比重越来越大的供热方式。伴随着集中供热的成熟化,集中供热控制系统中热网的电气自动化控制程度也越来越精细。分析了集中供热系统的组成和配置,并结合工程实践,对集中供热的电气自动控制进行了研究,提出了对集中供热系统进行电气自动控制的方案。从而保证供热效果,降低集中供热系统的热能和电能损耗。同时,也能够远程控制集中供热系统的各个站点及其设备,提高生产效率,实现自动化管理。     

对集中供热电气自动控制的探讨

本文分析了集中供热系统的组成和配置,并结合工程实践,对集中供热的电气自动控制进行了研究,提出了对集中供热系统进行电气自动控制的方案,随工作情况自动调整供热参数,使得集中供热系统能够稳定运行,从而保证供热效果,降低集中供热系统的热能和电能损耗。同时,也能够远程控制集中供热系统的各个站点及其设备,提高生产效率,实现自动化管理。     

集中供热系统不同调峰供热方式的技术经济性分析

本文主要分析了分布式调峰供热方式在集中供热系统应用中的技术经济性。通过节能性和经济性对比分析可知,相对于集中调峰供热方式,分布式调峰供热方式可以降低集中供热系统的供热能耗,提高承担基础负荷的集中热源的满负荷运行小时数、提高集中热源的供热效率,同时可以降低一次供热管网的初投资、减少一次供热管网的热损失。     

双级耦合热泵系统在别墅中应用模拟预测分析

本文在分析了寒冷地区别墅区供热特点的基础上,提出了一种生态循环供暖的空气/水 户式水/水双级耦合热泵系统,对双级耦合热泵系统的运行可行性进行了预测分析后,针对其在我国北方寒冷地区代表城市运行状况进行了模拟分析,模拟结果表明本系统可以在寒冷地区别墅区的供热中应用。本文还进一步分析了双级耦合热泵的特点,并在系统上做出改进,提出了供别墅区使用的单、双级混合供热系统。     

Exergoeconomic evaluation on the optimum heating circuit system of Simav geothermal district heating system

Simav is one of the most important 15 geothermal areas in Turkey. It has several geothermal resources with the mass flow rate ranging from 35 to 72 kg/s and temperature from 88 to 148 °C. Hence, these geothermal resources are available to use for several purposes, such as electricity generation, district heating, greenhouse heating, and balneological purposes. In Simav, the 5000 residences are heated by a district heating system in which these geothermal resources are used. Beside this, a greenhouse area of 225,000 m² is also heated by geothermal. In this study, the working conditions of the Simav geothermal district heating system have been optimized. In this paper, the main characteristics of the system have been presented and the impact of the parameters of heating circuit on the system are investigated by the means of energy, exergy, and life cycle cost (LCC) concepts. As a result, the optimum heating circuit has been determined as 60/49 °C.     

District heating system design for a university campus

İzmir Institute of Technology campus is in use since 2000 and still under development. At present, heating is provided by individual fuel boilers. On the other hand, the campus has a geothermal resource in its borders with a temperature of 33 °C. Because of this low geothermal fluid temperature; heat pump district heating system is considered for the campus. As an alternative, fuel boiler district heating system is studied. Each heating system is simulated using hourly outdoor temperature data. For the simulations, a control system with constant flow rate and variable return water temperature is used and the main control parameter is the indoor temperature. Various heating regime alternatives have been studied for heat pump district heating system for the various condenser outlet temperature and geothermal fluid flow rate, and two of these alternatives are given in this study. Furthermore, economic analysis has also been done for each heating system alternative based on investment and operational costs. Results indicate that heat pump district heating system has the highest investment but lowest operational cost.The alternatives are evaluated according to internal rate of return method, which shows the profit of the investment and resulted that, the heat pump district heating system has minimum 3.02% profit comparing with the fuel boiler district heating system at the end of the 20-year period.     

热电厂间接连接供暖系统能耗分析

以佳木斯市一新型墙体节能建筑小区供暖系统作为研究对象,通过对典型小区换热站的实际耗热量、耗电量和耗水量的统计和处理,分析了该类型供暖小区的供暖能耗水平,用实际供暖效果和数据验证了供暖系统的运行调节方法的效果和可行性。     

Performance investigation of two geothermal district heating systems for building applications: Energy analysis

The energetic performance of Balcova geothermal district heating system (BGDHS) and Salihli geothermal district heating system (SGDHS) installed in Turkey is investigated for building applications in this study. The essential components (e.g., pumps, heat exchangers) of these geothermal district heating systems are also included in the modeling. The present model is employed for system analysis and energetic performance evaluation of the geothermal district heating systems. Energy flow diagrams are drawn to exhibit the input and output energies and losses to the surroundings by using the 2003 and 2004 heating season actual data. In addition, energy efficiencies are studied for comparison purposes, and are found to be 39.36% for BGDHS and 59.31% for SGDHS, respectively.     

Heat supply to low-energy buildings in district heating areas: Analyses of CO2 emissions and electricity supply security

In several housing development projects in Norway the requirements related to the mandatory connection to district heating plants have shown to be a barrier for building low-energy residential buildings. The developers have considered the costs related to both low-energy measures and a space heating system that can utilize district heat to be too high to give the project acceptable profitability. In these projects the developers wanted to use a cheaper electric space heating system. Based on models representative for the range of the Norwegian district heating plants, calculations show that the CO₂ emissions related to heating in residential buildings with an energy standard in accordance with the new building regulations and that are connected to the district heating grid, are lower than for similar buildings with a low-energy standard and with heating based on electricity. However, in a long term perspective the differences are marginal when considering the national annual CO₂ emissions. Similarly, increased peak power demand due to electricity-based heating may also be regarded as marginal when compared to the present maximum peak power capacity in Norway.     

集中供热系统的运行调节技术分析

随着集中供热事业在我国的发展,节能越来越受重视,供热系统的运行调节是影响能耗的主要因素之一。对比分析了集中供热系统的几种调节方式的优缺点及应用范围,研究了如何进行供热系统的调节以满足用户的用热需求并达到节能降耗的目的。     

Monitoring the energy consumption in a district heated apartment building in Copenhagen,with specific interest in the thermodynamic performance

The energy consumption in an apartment building in Copenhagen supplied by district heating has been monitored from November 2000 to June 2002. During the period heat cost allocators were installed on the radiators and the set point for domestic hot water was raised in order to prevent the Legionella Disease. Results from the space heating system and the loading circuit for production of domestic hot water are discussed with respect to heat loads, cooling of the district heating water and the efficiency of the pump and the heat exchangers. The Public Service Obligation for utility companies in Denmark to help their customers to save energy calls for tools to analyse the energy consumption and the efficiency of the system. The possibility to use three-dimensional plots to analyse the thermodynamic performance is discussed as one option.     

两种采暖方式的比较

通过对低温热水地板辐射采暖和风机盘管采暖两种采暖方式经济性和优劣性的比较,对石景山区图书馆工程采暖方式决定采用低温地板辐射供暖系统,此系统成本低、舒适感好,值得推广使用。