浅谈节能建筑中升降遮阳百叶的功能

现代建筑技术的发展使得建筑立面变得更加活跃和自由.随着环保意识和建筑节能要求的提高,外遮阳技术逐渐成为节能建筑中不可缺少的一部分.百叶遮阳是外遮阳技术中的一种,以太阳谷升降百叶示范工程为例说明升降百叶遮阳不仅使建筑立面更加丰富多彩,而且改善了室内环境,提高了节能效率.     

太阳谷升降百叶遮阳与建筑一体化应用

随着环保意识和建筑节能要求的提高,外遮阳逐渐成为节能建筑中不可或缺的一部分。百叶遮阳是外遮阳技术中的一种。本文以太阳谷升降百叶工程为例,说明升降百叶遮阳不仅能够使建筑物立面更加丰富,还可以改善室内环境,提高节能效率。     

建筑设计中遮阳百叶的应用

结合国内节能建筑的现状，对遮阳百叶的特点和形式作了阐述，并对固定式、可动遮阳百叶的设计原理和应用作了分析，探讨了遮阳百叶的能效测定结果，指出采用可动遮阳百叶比固定遮阳百叶的节能效果好。     

设施遮阳与绿化遮阳的节能效果对比研究

遮阳措施对于降低建筑能耗意义重大。针对成都地区1栋典型多层居住建筑,分别对水平活动百叶遮阳和垂直绿化遮阳这两种不同形式下的建筑能耗进行了计算,深入分析了节能特点,根据不同朝向对比分析了节能效果。结果表明:垂直绿化遮阳综合节能率是同等条件下水平活动百叶遮阳节能率的2~3倍,是更适用于成都地区的外遮阳设计;4个方向均设遮阳的综合节能效果优于单向设置遮阳,单向设置遮阳中南向设置遮阳最优;绿化遮阳较广的遮阳面积及其对周围气候环境的动态响应机制更利于建筑节能。     

电动调节遮阳百叶的安装与调整

铝合金遮阳百叶是建筑幕墙体系的组成部分之一,可以起到装饰、遮阳等功效。本文通过对可调节式室外电动遮阳百叶系统结构的描述和使用特点的介绍,分析了其在设计施工中的可应用性。     

超大旋转玻璃遮阳百叶施工

中国人寿研发中心F-05地块(数据中心)工程,建筑幕墙总面积55 000 m2,其中外立面三层地面至四层顶,473樘8 m高玻璃百叶尤显节能、新颖、壮观。选用16a槽钢与160 mm×60 mm×10 mm矩形管焊接组成遮阳百叶的钢龙骨边框,两端设置89 mm钢管或变形钢杆与矩形钢管以穿透形式焊接。设计了电动控制系统,在克服自重并抵抗风荷载的情况下,保证遮阳百叶能自由旋转和停止,各项结构、装饰、绿色环保均达标,取得了良好的经济效益与社会效益。     

住建部发布遮阳技术目录

本刊讯住房和城乡建设部最近发布了《建筑遮阳推广技术目录》,包括建筑外遮阳织物卷帘、建筑外遮阳金属百叶帘、遮阳保温一体化双层节能窗、玻璃用透明隔热涂料、百叶帘调光控制系统等21个门类的建筑遮阳产品和技术被列入推广目录。其中,遮阳保温一体化双层节能窗,以其具有遮阳、通风、隔音、保温隔热等特点引起业界关注。     

近零能耗建筑外百叶遮阳节能采光耦合特性研究

近零能耗建筑的研究是我国建筑节能低碳发展的必然趋势,而外百叶遮阳是提高近零能耗建筑能效的有效措施之一,外百叶遮阳应用于近零能耗建筑的节能采光耦合作用值得深入研究和讨论。因此,该研究通过EnergyPlus能耗模拟与Daysim采光模拟,分析并量化了我国不同气候区百叶倾角下近零能耗建筑外百叶遮阳的节能采光耦合特性,并在此基础上,给出了不同气候区近零能耗建筑外百叶遮阳综合节能(电)潜力最大的百叶倾角推荐表,填补现有建筑节能标准的空白,并为外百叶遮阳在我国不同气候区近零能耗建筑中的应用提供设计参考。     

基于能耗控制的建筑外百叶遮阳优化研究

对透过建筑外百叶遮阳进入室内的太阳辐射得热进行了分析,并以建筑全年能耗为控制指标,提出了总辐射净得益量的概念,对建筑外百叶遮阳结构(百叶倾角和百叶数量)进行了优化,对比分析了优化模型与现用模型全年节能效果。结果表明,南向百叶遮阳的效果与百叶倾角有很大关系,而东西向则不明显;总辐射净得益量概念对于综合评价遮阳设施冬夏季的节能效果具有较好的指导作用。     

住房和城乡建设部发布遮阳技术目录

住房和城乡建设部最近发布了《建筑遮阳推广技术目录》,包括建筑外遮阳织物卷帘、建筑外遮阳金属百叶帘、遮阳保温一体化双层节能窗、玻璃用透明隔热涂料、百叶帘调光控制系统等21个门类的建筑遮阳产品和技术被列入推广目录。     

Improvement of natural ventilation in a large factory building using a louver ventilator

When heat generated from facilities inside a large factory building is not discharged outside the building due to a stagnant ventilation flow, the working environment of workers becomes worse, and the cooling of high-temperature products is delayed. In this study, wind tunnel tests were conducted to investigate the natural ventilation of entrained air inside a large factory building. The scale-down factory-building models were embedded in a simulated atmospheric boundary layer (ABL), and the mean and fluctuating velocity fields were measured using a two-frame particle image velocimetry (PIV) technique. For the original factory model, some of the outdoor air came in the factory building through the one-third open windward wall, while the stagnant flow region existed in the rear part of the target area. In order to improve the indoor ventilation environment of the present factory building, three different types of the louver ventilator were attached at the upper one-third open windward wall of the factory model. Among the three louver ventilators tested in this study, the ventilator model ?3 with the outer louver (θ_o=90°) and the inner louver (θ_i=−70°) was found to improve the natural ventilation inside the target factory-building model. It increased the flow rate of the entrained air by aligning the outer louver blades with the oncoming wind and guiding the entrained air down to the ground surface with the elongated inner louver blades.     

Numerical evaluation of louver configuration and ventilation strategies for the windcatcher system

The windcatcher system is a green architectural feature that uses natural ventilation to induce external airflow into residential buildings. This paper presents different configuration and ventilation strategies for the windcatcher to evaluate the performance of the system in relation to ventilation and indoor particle dispersion. A commercial computational fluid dynamic (CFD) code is used to evaluate the windcatcher’s performance using different numbers of louvers and louver lengths. The effects of buoyancy and window positions on the system’s performance are considered. The flow rate of air induced into the windcatcher is found to increase with the number of louver layers and the highest ventilation rate is reached when the louver length equates with the reference length. With respect to the buoyancy effect, the results show that the system performs well in stimulating airflow and removing contaminants when a window is positioned on the leeward side. A uniform and low particle concentration is created when a window is positioned on the leeward side. However, due to the high air velocity below the windcatcher, the general airflow distribution of the system is not uniform. A damper or egg crated grill should be installed at the terminal of the system, especially when the external wind is strong.     

百叶窗肋片流动与传热数值模拟与结构优化

对某空调器中φ9管径的百叶窗肋片空气侧的流动与换热进行了详细的三维数值模拟,优化了换热器肋片结构,提出了优化后的肋片结构参数.对比发现,在迎面风速范围内,优化后换热器压降减小,综合性能CPF提高;在换热性能基本保持不变且综合性能略有提高的情况下,换热器体积减小约33%.     

我国建筑外遮阳发展现状及其标准化进展

近年来,随着我国建筑节能的发展,建筑遮阳的推广应用成为大势所趋.本文即时当前我国建筑遮阳行业现状进行了综述,对其标准化进展的相关情况进行了介绍,并对当前遮阳行业面临的问题进行了分析.     

遮阳技术在现代建筑中的应用

主要介绍了建筑遮阳技术的种类以及对建筑节能的作用和效果,以广州市某建筑物为例,分析和评价了不同遮阳系统的设置方案对建筑节能的效果,并结合目前国内外遮阳技术的研究状况,提出了现代遮阳设计中应该考虑的问题和设计方法。     

Predictive simulation-based lighting and shading systems control in buildings

This paper presents a prototypically implemented daylight-responsive lighting and shading systems control in buildings that makes use of real-time sensing and lighting simulation. This system can control the position of window blinds and the status of the luminaires. It operates as follows: (1) at regular time intervals, the system considers a set of candidate control states for the subsequent time step; (2) these alternatives are then virtually enacted via a lighting simulation application that receives input data from a self-updating model of sky (luminance distribution maps obtained via calibrated digital photography), room, and occupancy; (3) the simulation results are compared and ranked according to the preferences (objective function) specified by the occupants and/or facility manager to identify the candidate control state with the most desirable performance.     

Occupants' operation of lighting and shading systems in office buildings

In most buildings, people operate control devices such as windows, shades, luminaires, radiators and fans to bring about desirable indoor environmental conditions. These control actions have a significant impact on buildings' performance and sustainability (energy use, indoor climate). A better understanding of the logic and patterns of such control-oriented user behaviour can not only facilitate better predictions of buildings' performance, but also support the effective operation of buildings' service systems. This paper describes an extensive empirical study of control-oriented user behaviour (as related to systems for lighting and shading) in a number of office buildings in Austria. The results specifically shed light on the relationships between control actions and environmental conditions inside and outside buildings.     

"沪上·生态家"动态遮阳技术及节能效果

本文对应用在"沪上·生态家"展馆的尚飞动态遮阳技术,即电动户外遮阳翻板、电动铝百叶帘及通过LON总线兼容到楼宇的自控系统,实现楼宇控制和阳光追踪等自动控制技术进行功能性阐述.并通过模拟软件,计算出楼宇在使用动态遮阳产品前后耗能的差别,以阐明使用动态遮阳技术带来的节能效果.