共查询到18条相似文献,搜索用时 120 毫秒
1.
自动故障检测与诊断在暖通空调中的研究与应用 总被引:6,自引:1,他引:6
介绍了暖通空调系统中自动故障检测与诊断的基本流程及故障分类。回顾了暖通空调行业中自动故障检测与诊断的研究现状、常用方法及应用情况。分析了故障诊断所面临的困难及今后的研究方向。 相似文献
2.
3.
4.
室内空气品质与暖通空调 总被引:18,自引:2,他引:16
就人们日益关注的室内空气品质问题进行描述,并阐明暖通空调与室内空气品质的关系,指出改善室内空气品质是一项综合工程,其中暖通空调系统是非常重要的影响因素,暖通空调技术的进步可以有效地改善室内空气品质。 相似文献
5.
故障诊断技术及其在暖通空调系统中的应用与发展 总被引:3,自引:0,他引:3
介绍动态系统故障诊断常用的几种方法及其在暖通空调领域的应用现状,重点阐述基于参数估计的方法的原理,分析在这一领域有待解决的问题和可能的发展方向。 相似文献
6.
神经网络故障诊断技术应用在暖通空调系统的可实现性 总被引:3,自引:0,他引:3
归纳了神经网络在故障诊断中的运用方式,探讨了故障诊断的神经网络方法和专家系统方法的联系和区别,以及两种方法的转化;最后,给出了神经网络故障诊断技术在暖通空调系统里的应用情况。 相似文献
7.
8.
9.
归纳了暖通空调系统中的常见故障,介绍了故障检测与诊断的基本方法,简要介绍了定性分析方法和定量分析方法,回顾总结了暖通空调系统故障检测与诊断的研究历史,详细阐述了国内外研究现状。分析指出目前暖通空调系统故障检测与诊断技术存在的问题与发展方向。 相似文献
10.
11.
A system-level fault detection and diagnosis strategy for HVAC systems involving sensor faults 总被引:2,自引:0,他引:2
This paper presents a strategy for fault detection and diagnosis (FDD) of HVAC systems involving sensor faults at the system level. Two schemes are involved in the system-level FDD strategy, i.e. system FDD scheme and sensor fault detection, diagnosis and estimation (FDD&E) scheme. In the system FDD scheme, one or more performance indices (PIs) are introduced to indicate the performance status (normal or faulty) of each system. Regression models are used as the benchmarks to validate the PIs computed from the actual measurements. The reliability of the system FDD is affected by the health of sensor measurements. A method based on principal component analysis (PCA) is used to detect and diagnose the sensor bias and to correct the sensor bias prior to the use of the system FDD scheme. Two interaction analyses are conducted. One is the impact of system faults on sensor FDD&E. The other is the impact of corrected sensor faults on the system FDD. It is found that the sensor FDD&E method can work well in identifying biased sensors and recovering biases even if system faults coexist, and the system FDD method is effective in diagnosing the system-level faults using processed measurements by the sensor FDD&E. 相似文献
12.
13.
基于BAS的空调系统过程监测与故障诊断 总被引:2,自引:0,他引:2
提出了基于BAS的空调系统过程监测与故障诊断模式,阐述用主成分分析法进行故障诊断的过程,并用其进行空调系统的传感器故障诊断。结果表明,主成分分析法具有很好的故障检测、故障识别和故障重构能力,还表明,故障诊断与BAS相结合是可行的。 相似文献
14.
建筑能源管理与控制系统中传感器故障及其检测与诊断 总被引:7,自引:1,他引:7
描述了传感器故障类型,给出了其故障函数。用主成分分析法对建筑能源管理与控制系统测量数据进行建模并对空调检测系统中的四类传感器故障进行检测与诊断。结果表明主成分分析法具有很好的故障检测和故障诊断能力。 相似文献
15.
16.
通过对HVAC&R系统环境性能评价方法的回顾,提出了一种新的评价方法。该方法基于专家问卷调查和层次分析法,确定各种环境影响因素的权重系数,根据各类污染物的排放总量和权重系数,计算各类污染物的当量值,将HVAC&R系统对环境的各类影响转化为一个统一的指标--黑点,从而直观、准确地表达HVAC&R系统对环境影响的大小。利用新方法对某办公楼空调系统的环境性能进行了模拟计算,结果表明该方法简单直观、切实可行。 相似文献
17.
Due to the lack of building simulation programs that can simulate in details the combined heat, vapor and liquid transfer in porous elements and the HVAC systems, a generic and flexible computational algorithm has been elaborated in order to integrate models for both HVAC systems and multizone building hygrothermal model. 相似文献
18.
Nathan Mendes Rogério M. Barbosa Roberto Zanetti Freire Ricardo C. L. F. Oliveira 《Building Simulation》2008,1(2):129-143
Due to the lack of a building simulation program that can simulate in details the combined heat, vapor, and liquid transfer
in porous elements and the HVAC (heating, ventilation and air-conditioning) systems, a flexible computational algorithm has
been elaborated in order to integrate models for both HVAC systems and multizone hygrothermal building model. In the algorithm,
models for the primary system-composed of chiller, cooling tower, primary pumps, and condensation pumps—have been described.
For the secondary system, models for the cooling and dehumidifying coil, humidifier, fan, and mixing box have been considered.
Those mathematical models have been integrated into the whole-building PowerDomus simulation environment. The simulation environment
is presented, and results show the usability aspects of the proposed computer environment by comparing air- and water-cooled
equipment. 相似文献