Parameters Optimization and Energy-Saving of Highway Tunnel Backlighting with LED

In order to acquire the most energy-saving luminairedistribution-parameters(LDPs)of highway tunnel interior zone backlighting,the parameters optimization model(POM)of backlighting for tunnel interior zone was established.Yanlieshan tunnel of Jiujing highway was taken as an example for the optimization.The optimal LDPs of the backlighting system of the tunnel interior zone were obtained by the POM,a comparison between the optimization results and those of Yanlieshan tunnel’s actual lighting system was performed,which showed that the optimized backlighting system with LED lamps installed according to the optimized LDPs could save energy remarkablely even under full capacity lighting condition.Illuminance and illuminance uniformity of the tunnel road surface still met the lighting demands even the LED lamp’s luminance decreased by 30%.A backlighting simulation experiment with the optimized backlighting LDPs for Yanlieshan tunnel was accomplished in the software Dialux.The simulation results basically agreed with the optimization calculated results from the POM which proved the correctness of the backlighting POM.

Design of Energy Saving Lighting System in University Classroom Based on Wireless Sensor Network

In order to reach the objective of intelligence and energy saving for university classroom lighting, energy saving lighting control system in university classroom based on wireless sensor network is designed, including design of sensor node and sink, as well as corresponding development of control program and upper-computer software. The system sets single-chip Ameg16 as control center, realizes communication between nodes via nRF24L01 wireless transceiver module, and realizes communication between sink and upper computer via w5100 wireless internet module. It perceives illumination intensity via photoconductor, detects the human body position via infrared pyroelectric sensor, and places the sensor node on the lamp, so the light can be controlled according to position of human body and current illumination intensity, which can realize energy saving to a large extent on condition that lighting requirement is satisfied. The system has low cost, and there is no need to change the original lighting circuit. The light can be turned off by hand, and when multi-media are used for the class, light can keep off even it is dim. In addition, this system has the function of automatic fault report, which is convenient for property maintenance.

Simplified prediction model for lighting energy consumption in office building scheme design

At the scheme design stage,the potential of daylighting is significant due to the saving for electric lighting use. There are few simple tools for architects to optimize the daylighting design. Therefore,it is useful to develop a design guideline related to the evaluation of lighting energy saving potential and sunlight design strategies. This paper analyzes the impacts of different artificial lighting control methods and design parameters on daylighting. A direct correlation between lighting energy consumption and parameters such as orientations,window to wall ratio (WWR) and perimeter depth is established. A simplified prediction model is proposed to estimate lighting energy consumption with the given perimeter depth,WWR,and window transparency. Validation of the model is carried out compared with detailed lighting simulation software for an office building. After the variation analysis for these parameters,design advises for the daylighting design at scheme design phase are summarized.

Effective Lighting Design Standards Impacting Patient Care: A Systems Approach

Background: Most healthcare settings are lit by a combination of daylight entering through windows, skylights and electric-light sources. It is important to understand how these two types of light sources differ to understand their relative impacts on human health and performance. It is found important to have a starting point in healing architecture and create an environment with knowledge of users sensory and functionally needs and looks at how hospital wards can support patients’ experience or maybe even have a positive influence on the recovery process. Methods: A systematic review of the literature to evaluate the impact of light on the quality of healthcare services was conducted. Several databases were systematically searched and evaluated. Results: Majority of the studies showed that distributions of light within a space in hospitals could substantially influence the health as well as perception of people within it. The study showed that in a multi-function and diverse habitant environment such as hospital treatment rooms, lighting system design plays a major role for comfort of the patients, the critical visual requirements for hospital staff, the comfort and visual need of the visitors. In addition to these goals, energy cost savings through the careful design of lighting schemes used in such applications. Conclusions: There is consistent evidence that shows the technical, architectural and energy aspects of providing optimal lighting conditions in different areas of a healthcare facility are important for patient, staff and energy conservation and cost within the hospitals.

Automated Smart Utilization of Background Lights and Daylight for Green Building Efficient and Economic Indoor Lighting Intensity Control

The ways which are used today in order to light houses, offices, and most of the indoor areas are inefficient as a lot of energy is consumed unnecessarily during the day time. Mainly this problem because the interior lighting design consider the worst case when the light service is at night, which is not always valid. Also in most cases the lighting system design relies on people to control the lights switching on and off. This problem is also one of the design concerns in Green Building. In this paper, a solution to this problem and a method for people’s comfort who use the indoor facilities in industrial buildings is presented. In the proposed smart lighting system, lights switch on automatically when there is somebody in the room or in the occupied space and switch off when there is no occupancy. In addition to this known technique, adjustment of the brightness level of the lights will be possible via the personal computer or any other smart device. In this method, for the illumination level in the area, where is needed to be controlled for better energy saving, the light automatically is measured by the sensor and considering the amount of background lights coming from outside, automatically the brightness of lights is controlled to reach the preset level that determined for that room. By the means of this method, it is possible to provide better user comfort, avoid human forcedness to switch the light on and off, and hence effective energy saving. Arduino controller is used to build the controller and to demonstrate the results. Economic analysis was done to calculate the percentage of the energy saving that can be obtained by implementing the proposed smart lighting controller. As an outcome of the economic analysis, energy saving norm for an office with a standard size was calculated.

Daylight Savings Calculation Technique for Smart Buildings

This publication presents a technique of quantifying energy savings due to daylight. The technique is designated to be used in smart buildings or similar applications where daylight harvesting is welcomed. The technique is divided into three stages. In the first stage an optical sensor is evaluated for its P (power)-E (illumination) response characteristics. In the second stage the calibration of room properties is carried out. In the final stage photometric calculations are performed, and energy savings are calculated. The major advantage of the proposed approach is to determine energy savings during the design stage of a building, not after the building construction or retrofitting. The information obtained from the calculations is useful for investors, future tenants and environmentalists.

Advancement in materials for energy-saving lighting devices

This review provides a comprehensive account of energy efficient lighting devices, their working principles and the advancement of these materials as an underpinning to the development of technology. Particular attention has been given to solid state lighting devices and their applications since they have attracted the most interest and are the most promising. Solid state lighting devices including white light emitting diodes （LEDs）, organic LEDs （OLEDs）, quantum-dot LEDs （QLEDs） and carbon-dot LEDs （CLEDs） are promising energy efficient lighting sources for displays and general lighting. However there is no universal solution that will give better performance and efficiency for all types of applications. LEDs are replacing traditional lamp,; for both general lighting and display applications, whereas OLEDs are finding their own special application,; in various areas. QLEDs and CLEDs have advantages such as high quantum yields, narrow emission spectra, tunable emission spectra and good stability over OLEDs, so applications for these devices are being extended to new types of lighting sources. There is a great dean of research on these materials and their processing technologies and the commercial viability of these technologies appears strong.

基于Vogit力学模型的照明系统节能控制研究

采用Vogit力学模型,构建照明系统离散动力学方程,分析照明系统状态空间变化特征,估计照明系统负载;引入电流灵敏度参量,结合照明系统电磁耦合特性,构建照明系统节能控制模型;通过自适应迭代处理实现自适应寻优,获取照明系统内环控制输出增益;根据照明系统节能控制带恒功率负载等效原理消除复阻抗,达到节能控制稳定的目的。以照明系统作为实验对象进行实验,结果表明该方法的节能控制效果较好,能够有效确保照明系统节能控制的稳定性。

城市轨道交通车辆减重节能技术

[目的]由于城市轨道交通(以下简称“城轨”)车辆新增的全自动驾驶技术、高冗余性技术等均在不同程度上增加了车载设备的数量,导致城轨车辆的质量越来越大,且由于城轨车辆的总体运量较大,导致其总体耗电量也维持在一个较高的水平。因此,需对城轨车辆的减重节能技术进行研究。[方法]分别介绍了车体、牵引系统及辅助电源系统、转向架及制动系统、空调系统及车门系统、车钩及贯通道、车辆内装及客室设备的减重措施;分别介绍了牵引系统及辅助电源系统、空调系统和照明系统的节能措施。[结果及结论]可采用的减重措施主要有:车体采用全铝结构;牵引系统采用永磁同步电动机;辅助电源系统采用高频辅助逆变器;充电机采用高频软开关设计;转向架采用轻量化设计;制动系统采用模块化设计;内装及客室设备采用新型材料。可采用的节能措施主要有:牵引系统采用永磁同步电动机;辅助电源系统采用高频拓扑结构;空调系统采用变频技术;照明系统采用OLED(有机发光二极管)光源。应用所介绍的减重及节能措施,基本能够达到车辆整体减重10%以上、节能10%以上的目标。

隧道过渡照明动态节能控制方法研究

针对目前我国隧道照明能耗高和智能化程度较低的问题,提出了隧道过渡照明动态节能控制方法。在隧道前方一定距离部署车辆感知传感器,隧道过渡区域部署照度传感器,控制中心根据采集的现场数据,在车辆进入隧道前智能控制照明环境,实现来车提前亮车走灯暗的按需照明;使驾驶员在隧道路口明暗过渡更平稳的同时,达到节能低碳目标。提出的方法可为隧道行车创造安全、舒适、节能的照明环境,可为隧道过渡区域照明设计或改造提供参考。

基于行车安全的隧道照明维养方法研究

为解决因隧道灯具状态变化引起公路隧道路面亮度降低从而导致的行车安全问题,本文通过现场实测与仿真模拟计算灯具衰损路面亮度值,分析路面亮度均匀度对公路隧道照明灯具安全性的影响,对公路隧道灯具划分不同衰损与失效组合,进行现场小目标物视认试验,运用层次分析法与Topsis综合评价模型对试验结果进行分析。结果表明,应针对不同失效组合提出针对性灯具维养方法;当行车安全系数远大于0.52时,可适当降低隧道照明灯具光通量,在保证隧道行车安全的前提下节约能源。

加油站智能灯光指引系统的研究与应用

加油站智能灯光指引系统根据加油站灯具、摄像头等设备的智能化升级,通过摄像头对车辆进行抓拍识别、加油机加油通信协议,实现由灯光的颜色变化智能指引车辆进站到达指定车位及加油过程的灯光管控。系统研究目的是通过现场各项智能硬件数据收集、判断及分析,结合车辆加油油品,实现现场智能引导流程,提升服务体验,同时实现环保节能、低碳排放,解决加油站现场排队及堵塞现象,提升服务等级和提高加油中转率。

大型铁路客站站房外遮阳节能潜力分析及调控阈值优化

大窗墙比、大天窗比的透明围护结构是大型铁路场站冷负荷大、环控能耗高的重要原因之一,外遮阳设置是缓解该现象的有效手段,但其应用还需合理平衡对自然采光的影响。以某大型铁路客站站房为对象,建立其光热环境数值分析模型并进行验证;在此基础上,以空调照明综合能耗为指标,选取卷帘外遮阳为代表,分析建筑外遮阳在不同气候区铁路客站应用的综合节能潜力,并确定了适宜外遮阳应用的热工气候分区;在保证室内光热环境水平的前提下,分析空调照明综合能耗随外遮阳调控阈值(以太阳辐射投射强度为依据)的变化情况,并总结不同气候区的最佳调控阈值。该研究成果完善了交通基础设施的被动式技术体系,可为外遮阳技术在大型铁路客站站房的设计和调控提供理论依据。

健康视角下的地下空间绿色照明设计研究

光环境对于人体健康至关重要,不良光环境会导致视觉疲劳、人体节律紊乱、工作效率低下等问题。随我国地下空间的迅速发展,地下空间光环境中缺乏自然光、照明水平不足以及照明分布不均匀等问题日益突出。针对现有问题,从引入自然光、模拟日光特性、模拟自然景观照明等方面进行分析,提出地下空间照明设计改善策略,并对健康照明未来发展方向提出建议,以期为地下空间健康光环境设计提供参考。

“双碳”背景下的城市地下空间光热环境的节能设计研究进展与展望

城市地下空间节能设计作为实现“双碳”目标的重要途径,其光热环境的调控受到学者们的广泛关注。目前已证实地下空间的光热环境具有巨大的节能潜力,但光热环境与节能设计之间的影响关系和结合途径尚未厘清。研究通过界定以人为本、取于自然、建筑节能等关键问题,深入解析城市地下空间设计对空间光热环境及能源消耗的影响,确定建筑节能的上下限,并提出地下空间光热环境节能的设计流程链,以期解决地下空间光热环境能耗高、碳排高的问题,为城市地下空间的能源使用效率与人居环境质量的提高提供参考。

基于储能发光涂层的隧道用照明系统的开发

利用储能发光材料的吸光-发光特点,针对现有隧道用照明系统耗能大、眩光对驾乘人员存在安全隐患等问题,自制储能发光涂料,在物化性能检测合规的情况下,搭配LED激发灯与水纹灯形成具有舒缓照明功能的隧道照明系统,该系统在都(匀)香(格里拉)高速六(盘水)威(宁)段高速黄家屋基隧道进行了示范应用,取得了优于传统照明方式的效果。经评估,基于储能发光涂料的照明系统具有安全、舒缓、节能、应急等优点,可以在隧道照明中大范围推广。

PLC模糊PID控制系统在隧道照明节能控制中的应用

我国公路隧道里程逐年增加,通过在隧道中布置照明系统来保证行车安全和满足司机良好的视觉需要,但照明费用在隧道运营成本中占据比例较高。针对这一问题,设计照明节能控制系统,通过现场PLC连接远程上位机,采用模糊PID算法实现隧道照明控制,通过控制灯具变功率调光从而实现节能。设计了系统的控制架构,给出了采集隧道实际亮度和需求亮度的方法,提出了模糊PID控制算法实现的流程。通过实验证明,提出的方法能有效实现隧道的照明节能。

基于绿色医院理念的医院照明系统改造实践——以人体存在感应模组的应用为例

随着互联网等多种新兴科技的发展,绿色环保技术逐步升级,在医院的改造建设中,除了考虑其坚固性、实用性外,更多的应从绿色环保的角度出发进行改造。在诸多基础用电设施中,日常照明用电约占医院总用电量的10%~12%,其中的大部分照明灯具均设置为长亮,在一些间歇式无人的地方综合利用率极低。为有效节约日常照明用电,将调频连续波(FMCW)技术与医院照明系统相结合,有效规避了传统声控或热感应的弊端,在准确识别静止人体的基础上实现了“人在灯亮、人走灯灭”的功能。同时结合实际应用数据分析,证明了改造后确实能为医院带来20%~30%的节能收益,为针对医院的绿色建筑改造中类似的工程提供借鉴意义。

建筑电气照明节能技术的研究

为了深入探讨建筑电气照明节能技术的优化与应用,本文首先介绍了照明设备如何选型,对采光天窗综合利用、照明控制制定与节能、照明配电优化与节能进行设计。在此基础上,提出了一系列针对性地节能技术措施。研究结果表明,通过综合运用这些节能技术,可以有效降低建筑电气照明的能耗,提高能源利用效率,对推动绿色建筑和可持续发展具有重要意义。

医院照明设计的探讨

本文介绍了医院照明的标准和要求,包括照度和功率密度等参数。不同区域的照明需求、节能效果和舒适度等因素需要综合考虑。医院照明设计需遵循因地制宜的原则,选择合适的灯具和照明方案,以提供安全、高效、舒适的照明环境。这些标准和要求不仅保证了医院的照明质量,还有助于提高医疗工作的效率和医疗照明的舒适度,同时也有利于节约能源和保护环境。