提高本院住院大楼电梯运输能力解决方案研究

研究电梯运行方案,提高电梯运行能力。方法针对本院电梯运行特点，从运行路线，运行时间、乘客流量及优化方案的黄金分割特点．进行对本院电梯的运行方法进行改进,结果强化运行管理后患者及职工对电梯的运行满意度明显提高，明显提升了医院的服务水平。     

浅析变电运行管理及运行事故的处理与防范

变电运行工作中，运行人员专业水平非常关键，变电运行工作性质的特殊性，务必加强工作人员对工作的责任心，同时不断的提升变电运行技术水平。本文从变电运行的安全管理及变电运行事故处理与防范展开论述，为当前的运行工作经验添砖加瓦。     

浅析二级泵站中水泵的调速节能

对二级泵站的几种运行方式，即定速运行、变速恒压运行、变速变压运行，从能量消耗的角度上进行了分析，并指出了各运行方式的适用场合，同时探讨了二级泵站中水泵的一些节能运行方式。     

澄清池生产运行参数的优化

本文主要介绍了机械加速澄清池的工作机理，对影响其运行效果的主要因素进行了分析，并通过实验与实际运行对其生产运行参数进行了优化总结，对机械加速澄清池的稳定运行具有指导意义。     

便于定期检验的分离式限速器

电梯在人们的日常活动中是不可缺少的代步运行设备，电梯运行的安全可靠性对电梯乘客的人身安全保护非常重要。控制电梯在额定速度内安全运行的主要安全部件是限速器，它是每部电梯不可缺少的安全保护主要部件之一。当电梯发生超速失控时，电梯限速器应立即动作，断开电梯的急停电路，并通过限速器传动钢丝绳拉动安全钳，把电梯轿厢制动停止在电梯运行的轨道上，迫使电梯停止运行。为了保证电梯安全运行，电梯限速器就要保持在运行中灵活可靠，当超速时设定动作应准确、及时，为了防止电梯限速器在运行中制动失效或误动作对电梯的安全运行造成事故对申梯限速器定期柃测是非常必要的工作。     

远郊长输热网与市区热电联产并网实践

多热源联网可实现热源间互补，提高热网系统运行安全稳定性。太原热力集团2021年对两个热电联产热网并网运行实践，实现了特殊区位热网并网运行，解决了燃气缺乏导致的热源能力不足的问题，为复杂热网工况并网运行提供了实践依据和经验。并网运行对运行整体控制要求高，需要结合并网的目的、需求及实际管控内容进行深入分析，做好应对紧急工况的准备。     

浅析泵站实际运行情况及其优化调度

我国泵站类型多、范围广、数量多，在民用用水、工业生产中占据重要位置，使用广泛。在泵站运行过程中，消耗大量能源，且多数能源用在无用功方面，运行成本高。因此，降低能源消耗、运行成本，提高泵站运行效率成为泵站管理的重要方向。泵站运行优化急需开展，即优化泵站运行方式、调节水泵工况，实现泵站运行的经济、社会效益。本文主要对目前我国的泵站运行的实际情况进行分析，并在此提出优化调度的具体措施。     

燃气中央空调系统投运初期运行成本案例分析

对于以燃气作为能源的中央空调系统，在投运初期，实际运行成本往往与理论计算运行成本有较大差异。文章通过具体工程案例，对燃气中央空调系统理论运行成本进行测算，并对首个采暖和制冷周期内的实际运行成本进行统计，比较两者差异情况，分析产生差异的主要因素。     

火力发电厂发电机组的集控运行研究

随着当前社会科学技术的发展，我国的各项经济建设事业不断壮大，对于电力能源的消耗量也与日俱增，所以促使我国的火力发电厂不断地进行自身技术的创新，包括从基本的操作技术和对发电机组的集控运行等方面都进行了较为全面的改造，因此为了进一步的改造我国的火力发电机组的集控运行技术，提高火力发电厂的日常工作效率，就要对火力发电厂主要的发电机组集控设备进行全面的分析，改良技术、提高其集控运行能力。本文主要对火力发电厂发电机组集控运行进行了分析，介绍了发电机组集控系统正常运行条件，并就集控运行系统技术进行了阐述，最后提出了一些关于火力发电厂发电机组集控运行时的注意事项。     

电力调度运行中的安全防范策略分析

根据电力调度运行系统的实施现状，对电力调度系统运行中的安全防范问题进行分析，并对相应的问题提出几项措施，最后进行简单的总结与思考，对于电力调度运行安全具有较高的参考价值。     

空调系统节能改造技术措施分析

本文探讨了空调系统节能改造中具有较好投资回报期的措施,包括风机盘管改造与控制、过渡季节空调箱利用新风供冷、空调系统区域控制、冷冻水变水量控制以及制冷主机改造。     

住宅夏季空调行为对空调能耗的影响研究

本文针对北京地区的城镇住宅,采用问卷调查的方式,从居住者使用的角度分析了住宅空调行为在空调设定温度、空调运行时间、空调同时运行台数及空调运行时门窗开关状况等方面的分布,研究发现了住宅空调行为的变化特点以及不同住户空调行为模式的差异。在此基础上,采用模拟分析的方法,计算确定了空调行为模式对住宅空调能耗的影响程度。最后,对空调实际耗电量与模拟计算结果进行了比较,验证了空调行为调查统计结果的可靠性。     

吴江公共卫生中心空调系统设计

本文简要介绍了多种功能需求的建筑采用不同分布式冷(热)源及空调系统的设计过程,归纳了设计中所采用的节能方式和措施,为类似工程设计提供了设计方法。     

卷烟厂变风量空调系统风阀控制方案探讨

空气处理机组风阀控制的传统方法是将新风阀、回风阀、排风阀三者的开度进行开度匹配联动控制。但是在空调系统的实际运行中发现,采用这种控制方法在某些情况下会引起室外新风通过排风阀倒灌进入空调机组中,从而影响室内的空气品质和空调的节能运行。本文研究了这种现象的原因,并提出了一种能避免这种现象的新的风阀控制方法。这种新的风阀控制方法只将回风阀和排风阀进行开度联动控制,在空调运行过程中,新风阀一直处于全开状态。本文最后通过现场实测结果证明了新的风阀控制方法的改进效果。     

Microorganisms and particles in AHU systems: Measurement and analysis

In this study, for better understanding the practical removal effect of air handling unit (AHU) system on airborne microorganisms (including bacteria and fungus) and particles and microbial growth, the samples of microorganisms and particles in 10 air handling unit (AHU) systems including fan coils and indoor air were collected and analyzed in air and component surfaces of such systems in two large public buildings. It is found that the removal efficiency is of the highest for bacteria 73.9% and the lowest for particles (0.5–2 μm) 24.4%. The surface concentration of equipment bacteria is 29 CFU/cm² and fungi 137 CFU/cm². Five of 10 systems have higher fungi concentrations on air intake than that on diffuser. The results also show that the central air supply system with common components (e.g., pre-filter and bag filter) has difficulty to achieve/maintain good performance once microorganisms and particles exist, especially for particle size D ≤ 3.3 μm. The size distribution has large influence on removal efficiency. The microbial growth on surfaces of duct and equipment was noticed and may be transferred into indoor air. This will decrease the indoor air quality and lead to adverse health effect.     

外冷型多级蒸发制冷空气处理机组性能分析

介绍了该机组的空气处理过程。机组夏季出风参数主要与进风参数、进水温度、风水比、直接蒸发制冷段效率有关。在分析影响因素的基础上,绘制了机组在不同地区应用时的夏季出风参数图,并给出了机组出风参数确定的一个实例。计算了机组的夏季性能参数。     

一次回风空调箱冷却除湿过程计算

分析了舒适性空调系统中由空调箱选型不当引起的空气处理偏离设计状态点的现象。验证了风机盘管表冷器修正公式应用于空调箱的可行性。提出了空调箱特性指标(S0B00.162)的概念,建立了一次回风系统空调箱空气热湿处理过程数学模型,并使用MATLAB软件编程求解模型,在一定设计条件下计算出空调箱的出风参数、供回水温差,并以供回水温差作为空调箱选型的依据。运用模型对两个气候差异较大地区的候车厅空调箱进行选型计算。建立的数学模型及求解方法同时可作为空调箱运行调节的依据。     

空调机组风量偏差对室内状态点的影响

按固定新风比和固定新风量两种工况分别分析了空调机组风量小于设计风量和空调机组风量大于设计风量两种情况对室内设计状态点的影响。     

Variation in indoor particle number and PM2.5 concentrations in a radio station surrounded by busy roads before and after an upgrade of the HVAC system

Indoor particle number and PM_2.5 concentrations were investigated in a radio station surrounded by busy roads. Two extensive field measurement campaigns were conducted to determine the critical parameters affecting indoor air quality. The results indicated that indoor particle number and PM_2.5 concentrations were governed by outdoor air, and were significantly affected by the location of air intake and design of HVAC system. Prior to the upgrade of the HVAC system and relocation of the air intake, the indoor median particle number concentration was 7.4×10³ particles/cm³ and the median PM_2.5 concentration was 7 μg/m³. After the relocation of air intake and the redesign of the HVAC system, the indoor particle number concentration was between 2.3×10³ and 3.4×10³ particles/cm³, with a median value of 2.7×10³ particles/cm³, and the indoor PM_2.5 concentration was in the range of 3–5 μg/m³, with a median value of 4 μg/m³. By relocating the air intake of the HVAC, the outdoor particle number and PM_2.5 concentrations near the air intake were reduced by 35% and 55%, respectively. In addition, with the relocation of air intake and the redesign of the HVAC system, the particle number penetration rate was reduced from 42% to 14%, and the overall filtration efficiency of the HVAC system (relocation of air intake, pre-filter, AHU and particle losses in the air duct) increased from 58% to 86%. For PM_2.5, the penetration rate after the upgrade was approximately 18% and the overall filtration efficiency was 82%. This study demonstrates that by using a comprehensive approach, including the assessment of outdoor conditions and characterisation of ventilation and filtration parameters, satisfactory indoor air quality can be achieved, even for those indoor environments facing challenging outdoor air conditions.     

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.