热力入口控制调节设备的合理使用

一个有效节能的供热系统都配有相应的调节控制设备，如自力式流量、压差控制阀等。随着供热计量收费体制的改革，室内供暖系统装配温控阀后热网如何正确配备控制设备是非常重要的。本文论述了装配温控阀前后系统的特性变化，指出了与温控阀正确配备的控制设备，对设计和改造有指导意义。     

计量收费后热网运行的特点及控制策略

随着热计量改革的进展,传统供热系统运行模式已经越来越不适用。本文介绍了在新的条件下,装配温控阀前后系统的特性变化,指出了与温控阀正确配备的控制设备;以及相应的热网运行特点和控制策略。     

计量收费后热网运行的特点及控制策略

随着热计量改革的进展，传统供热系统运行模式已经越来越不适用。本介绍了在新的条件下，装配温控阀前后系统的特性变化，指出了与温控阀正确配备的控制设备；以及相应的热网运行特点和控制策略。     

计量供热系统二次管网水力调控装置的适用性分析

供热系统为达到高效、节能的目的,都配有相应的水力调控装置,如静态平衡阀、自力式压差控制阀等。随着我国热计量改造工作的迅速开展,室内供暖系统装配恒温阀后热网如何正确配备调控装置是至关重要的。论述了调控装置的调节特性,在不同定压差控制方式下,采用理论计算方法对与恒温阀配合使用的调控装置的适用性进行了分析,对计量供热系统的设计和改造具有指导意义。     

分户控制 分户计量后，室内系统 外网系统运行控制初探

本文阐述了室内供热系统分户控制分户计量后，热表、温控阀如何选型外网如何控制，外网调节设备如何选型。     

调节装置在热水供热系统中的应用

一个有效节能的供热系统都应该配有相应的调节控制设备,如自力式流量调节阀、平衡阀、自力式压差控制阀等.本文主要针对这些调节装置在系统中的应用进行论述.     

自力式压差控制阀实现高低区直接连接供热

介绍了高层建筑供热系统的设计方式及各自特点。提出采用自力式压差控制阀等常用控制阀门,实现高层建筑高区与低区供热系统直接连接的供热形式。     

温度控制阀及其运行特性试验方法

本文介绍了国内最新研制的温度控制阀(简称温控阀)的结构和工作原理;温控阀运行特性的试验方法、试验装置和试验结果。     

供热改加速、温控阀看好、惠康阀走俏

我国要加快推进城镇供热体制改革,停止福利供热,实行用热商品化。温控阀将被大量采用。文中介绍了国产惠康温控阀的特点及优势。     

供热改加速、温控阀看好、惠康阀走销

我国要加快推进城镇供热体制改革，停止福利供热，实行用热商品化。温控阀将被大量采用。中介绍了国产惠康温控阀的特点及优势。     

Design of a robust controller for doubly fed induction generator to damp low frequency oscillations in emerging distribution systems

Emerging distribution systems accommodate a large number of dynamic devices such as distributed energy resources, their controllers and other smart devices. Complex interactions among these dynamic devices may result in a number of instability issues. One of the important instability concerns is the small signal instability caused by oscillatory modes with lower values of frequency and damping ratios. In such cases, a suitable control methodology must be applied to ensure the stability of an emerging distribution system. In this paper, a robust control methodology for a doubly fed induction generator (DFIG) is proposed for the enhancement of system stability. The impact of active and reactive power of the DFIG on a low damped mode is assessed. The effectiveness of the controller is tested in an IEEE 43 bus distribution system with distributed generation units. Results show that the proposed robust controller for the DFIG can support damping of critical modes.     

压差控制阀在分户计量双管供暖系统中的应用

对压差控制阀在分户计量双管供暖系统中的三个应用方案进行了分析，给出了各方案的选择原则，并指出分户计量双管供暖系统在设计工况下进行水力计算时，自然作用压头可以不予考虑，户内和户外系统应采用异程式。     

Thermostat strategies impact on energy consumption in residential buildings

This paper identifies the impact of thermostat strategies on heating and cooling energy consumptions in buildings, thus suggesting the importance of a database for understanding the effect of thermostat settings and for deciding energy-conscious strategies.Using computer simulation, diverse thermostat strategies – change of setback period, change of set-point temperature, and change of setback temperature – were tested parametrically in a typical USA single-family homes, located in two climate zones, namely cold (Detroit, Michigan) and hot-humid (Miami, Florida).Analysis revealed that heating and cooling systems were significant energy-consuming components in each climate zone. Accordingly, heating energy in cold climate zones and cooling energy in hot-humid climate zones have potential for matchingly significant saving. Diverse thermostat strategies (changes of setback period, of set-point, of setback temperature) demonstrated their obvious impacts on such saving. In the cold climate in particular, the heating system showed the most significant energy-saving effect via proper thermostat strategies. Proper setback period, set-point and setback temperature need to be established to achieve energy efficiency in residential buildings.     

自适应模糊PID控制器的研究

除了开／关控制,常规PID控制器是HVAC系统现场控制中应用最为广泛最基本的控制器,但对于非线性、时变的系统,常规的PID控制则很难达到满意的控制效果。本文提出了自适应模糊PID控制器模型,可以根据系统误差和误差变化率不断对PID控制器的输出进行在线调整。以某空调房间温度控制系统为研究对象,对自适应模糊PID控制器和常规PID控制器进行了对比。计算结果表明,自适应模糊PID控制器具有良好的动、静态性能,并且鲁棒性较强。     

An experimental system for advanced heating,ventilating and air conditioning (HVAC) control

While having the potential to significantly improve heating, ventilating and air conditioning (HVAC) system performance, advanced (e.g., optimal, robust and various forms of adaptive) controllers have yet to be incorporated into commercial systems. Controllers consisting of distributed proportional-integral (PI) control loops continue to dominate commercial HVAC systems. Investigation into advanced HVAC controllers has largely been limited to proposals and simulations, with few controllers being tested on physical systems. While simulation can be insightful, the only true means for verifying the performance provided by HVAC controllers is by actually using them to control an HVAC system. The construction and modeling of an experimental system for testing advanced HVAC controllers, is the focus of this article.     

Application of adaptive predictive control to a floor heating system with a large thermal lag

This paper describes an improved algorithm for generalised predictive control (GPC) and applies it to a floor radiant heating system in a full-scale outdoor test-room. The floor heating system is first identified by means of recursive least squares techniques associated with a set of supervision rules for robust system identification. The performance of the floor heating system controlled by GPC, on-off and PI controllers is then evaluated through computer simulations, using the identified models. Experimental results show that the room temperatures predicted with the identified models agree well with the measured data. Simulation results demonstrate that the behaviour of GPC is superior to the other two controllers in terms of response speed, minimum offset and on-off cycling frequency.     

分户燃气供暖投资和运行费用的研究

本文简要介绍了2009年度青岛地区分户燃气供暖运行情况的实验测试。通过入户监控和差异化控制方式,得出了在一定气候条件和运行方式下的燃气消耗,对比集中供暖的投资费用和运行费用,提出分户供暖的运行费用与控制方式有直接的关系。并指导用户正确理解和使用时间控制器和温度控制装置,可以有效降低运行费用。     

供暖系统恒温阀控制特性分析

恒温阀由恒温控制器(核心元件为感温包)与流量调节阀组成。建立恒温阀控制室内温度的数学模型,对恒温阀的控制特性进行了分析。恒温阀的控制为比例控制,其控制精度由感温包特性、流量调节阀的机械特性、供暖系统计算参数及恒温阀控制环路的滞后性决定。     

自力式流量控制器在二级热网应用的效益分析

介绍了二级热网加设自力式流量控制器的设计选型，并就供暖效果，节约能源效果等进行了分析。