变频调速在起重机中的应用

本文详细介绍了变频调速的技术特点、发展状况及目前变频调速器的性能特点，结合传统起重机电气控制存在的问题，讨论了变频速器在起重机电气控制中的适用性及在实际中的技术问题。     

某国际机场T1航站楼中央空调系统单机调试

介绍成都天府国际机场T1航站楼中央空调系统变频空调机组控制系统的调试准备工作及调试流程、调试前的检查、变频柜及变频电机调试运行试验、空调机组通电单机试运行,总结空调机组变频控制系统调试的注意事项.     

供热系统中变频水泵调节效率及功率分析

针对变频调节的技术原理及效率的影响因素进行了研究,分析了变频水泵效率的影响因素、影响效果以及变频调节的效率随转速的变化情况,绘制出了转速与效率的变化曲线图,并对变频调节的效率和功率进行了探讨,绘制了效率对功率的影响曲线图,总结了变频调节效率、转速比与功率的关系,为之后变频技术的运用奠定良好的基础。     

变频调速对起重机的影响及对策

为了使变频调速技术在起重机中得到更好的应用,分析了变频调速的原理和变频调速在起重机应用中的优缺点,介绍了变频调速干扰产生的原因及其传播的途径,分析了电磁干扰对机上其它电气设备及变频调速系统本身的危害,综合考虑设计、安装和使用3方面的因素,提出了干扰抑制和抗干扰对策。对于提高变频调速的可靠性具有一定的参考价值和现实意义。     

节能改造变频供水系统

简单介绍了变频供水系统的配置及能耗情况,分析了变频供水系统在节能方面的优势,并阐述了变频供水系统配置与节能的关系及优化措施,结合具体实例对采用变频供水系统产生的节能效益作了具体说明,以促进其推广应用。     

并联变频水泵调速特性试验研究

搭建了并联变频水泵试验平台,介绍了试验条件及数据处理方法,对2台相同水泵在不同工频运行工况点和不同并联变频运行模式下变频水泵装置的功率、效率随频率的变化规律进行了试验研究。结果表明:当工频运行工况点位于高效区不同位置时,相同变频运行模式下水泵功率和效率变化规律不同;2台相同水泵并联变频运行,同步变频运行模式优于异步变频。     

变频技术在WK35矿用挖掘机上的应用

以WK35矿用挖掘机为例,采用变频调速技术和PLC对该机进行控制,主要研究了该机各个机构变频调速的性能、特性曲线及变频调速电气控制系统的组成、特点等,在矿用挖掘机上使用交流变频调速技术,不仅具有良好的调速性能、还具有显著的节电效果。     

住宅小区微机供水的节能运行方式

为了使小区二次加压泵站更加经济的运行,本文介绍了普通循环软启动恒压变频供水系统、带小流量泵的循环软启动变频供水系统、全流量高效变频供水系统和变流变压供水系统的工作原理、控制方法及适用条件。     

陶瓷辊道窑传动变频调速系统分析与设计

分析了陶瓷辊道窑传动系统的特点及变频调速传动系统的原理、特性及设计方式,参数的选择和确定。分析了变频调速系统高次谐波及噪音产生原因及其抑止措施。     

有关空调变频控制器的相关问题探讨

本文就变频调速技术在空调器中的基本组成、优点、类型及直流变频分体式空调器的结构与控制系统进行了介绍和分析。     

Adaptive HVAC zone modeling for sustainable buildings

Control of energy flows within a building is critical to achieving optimal performance of heating, ventilation and air-conditioning (HVAC) systems. To design optimal HVAC control strategies, a dynamic model of the HVAC system - particularly the building zones that it services - is essential. As analysis of building energy consumption is facilitated by the accurate prediction of indoor environmental conditions, techniques that dynamically model HVAC zones are crucial, and as such, is an active area of research. This paper focuses on real-time HVAC zone model fitting and prediction techniques based on physical principles, as well as the use of genetic algorithms for optimization. The proposed approach is validated by comparing real-time HVAC zone model fitting and prediction against the corresponding experimental measurements. In addition, comparison with prediction results using an algorithm based on feedback-delayed Kalman filters has demonstrated the superiority of the proposed approach in terms of prediction accuracy.     

因特网在暖通空调专业上的应用

简要介绍了因特网（Ｉｎｔｅｒｎｅｔ）的概念和上网所需的计算机硬件和软件，提出了有关暖通空调专业的一些网址信息，展望了因特网在暖通空调专业上应用。     

绿色暖通技术在民用建筑领域的应用论述

随着冬季供暖问题在我国的普及,绿色暖通技术是当前较为盛行的一种节能环保新技术。本文围绕着绿色暖通空调技术,介绍了当前我国暖通空调节能技术应用现状及存在的问题,重点探讨了绿色暖通技术在民用建筑领域的应用。     

基于WEB数据库的ASP编程技术与暖通空调专业网站建设

结合当前国内外暖通空调专业网站的建设情况,提出了将基于Web数据库的ASP编程技术应用于专业网站建设的必要性,并具体介绍了该技术的特点、方法和优势。在此基础上,根据网站建设的实际经验,阐述了网站的创建过程及专业信息数据库的建设方法。最后,展望了Internet在本专业的应用前景。     

CFD与EnergyPlus软件在暖通空调工程的应用

介绍了CFD与EnergyPlus两种暖通空调系统分析软件，探讨了两种软件在暖通空调工程领域的应用。     

Identifying decaying contaminant source location in building HVAC system using the adjoint probability method

Building heating, ventilation and air-conditioning (HVAC) system can be potential contaminant emission source. Released contaminants from the mechanical system are transported through the HVAC system and thus impact indoor air quality (IAQ). Effective control and improvement measures require accurate identification and prompt removal of contaminant sources from the HVAC system so as to eliminate the unfavourable influence on the IAQ. This paper studies the application of the adjoint probability method for identifying a dynamic (decaying) contaminant source in building HVAC system. A limited number of contaminant sensors are used to detect contaminant concentration variations at certain locations of the HVAC ductwork. Using the sensor inputs, the research is able to trace back and find the source location. A multi-zone airflow model, CONTAM, is employed to obtain a steady state airflow field for the studied building with detailed duct network, upon which the adjoint probability based inverse tracking method is applied. The study reveals that the adjoint probability method can effectively identify the decaying contaminant source location in building HVAC system with few properly located contaminant concentration sensors.     

2006年全国暖通空调制冷学术年会综述

概要介绍了年会盛况，报道了各专题讨论会的主题，以附录介绍了低温地板辐射供暖技术，供热节能技术，安全、健康、节能的通风技术，暖通空调能源的合理利用，建筑节能——标准、设计与实践，温湿度独立控制空调系统，水系统变流量，蓄冷空调，区域供冷，地源热泵技术，地源热泵技术与工程应用，能耗模拟与系统控制，建筑环境仿真等13个专题讨论会的交流小结摘要。     

An exergy application for analysis of buildings and HVAC systems

The paper presents an extended method for exergy analysis of buildings and Heating Ventilation Air Conditioning (HVAC) systems, according to an energy demand build-up model from the building side to the energy supply side. The HVAC systems comprise a thermal energy emission and control system, a thermal distribution system, an electricity distribution system and an energy conversion system. Energy and exergy that are required by a building and a HVAC system are posed into the external part and classified by different forms of energy carriers. The external part is out of the boundary of the study. The method is illustrated with an office building equipped with low-temperature heating and high-temperature cooling systems situated in the Netherlands. Thermal exergy and thermal energy demands of the building and thermal energy and thermal exergy losses occurring in the HVAC systems are discussed. The building and the HVAC systems to be considered meet standard Dutch energy performance regulations. Nevertheless their overall exergy efficiencies are low in both cases (17.15% and 6.81% subsequently). The exergy analysis also pinpoints that the thermal energy emission and control system and the energy conversion system are the main causes of the exergy inefficiencies in the heating and cooling cases, respectively.     

Investigations of urban surface conditions for urban canopy model

The authors carried out several investigations to clarify the features of urban surface conditions in the urban canopy Model (UCM). The authors first conducted field investigations regarding the solar reflectance of urban surfaces. First, the wall reflectance and the proportion of the glazing area were measured in several urban areas. The relationship between the solar reflectance of road and traffic density is clarified based on the outdoor measurement and the field survey. It is also presented that the reflectance of the building rooftop varies significantly depending on building use and the influence of machinery in the area of the HVAC.

The authors secondly investigated the height of released anthropogenic heat from the HVAC system based on a field survey and a database of HVAC systems provided by certain journals. From these investigations, it is presented that the type of HVAC system and the height of released anthropogenic heat vary with the building scale. Finally, an investigation of urban geometric figures was conducted using GIS data from Tokyo and Fukuoka in Japan. The vertical distribution features of both the roughness volume density and the building wall area density were classified according to the gross ratio of building volume.     

对绿色暖通技术应用的思考

当前,随着施工技术的不断发展,绿色暖通技术在民用建筑施工中被广泛应用。然而,因为其安装工艺非常复杂,所以,在质量控制方面存在一定的问题。本文就对绿色暖通技术在民用建筑领域中的应用进行了有效地阐述和分析。