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.

Characteristics of office lighting energy consumption and its impact on air conditioning energy consumption

The energy consumption of office buildings has increased sharply since the 21st century with the increasing ur-banization coverage.At this stage,the energy consumption of office buildings in China mainly comes from air conditioning and lighting.This paper obtains the regression equation of natural lighting illumination and radi-ant heat gain under different curtain conditions through experiments and simulations,and gives the theoretical calculation process of curtain regulation of office thermal and light environment and energy consumption.DeST and Ecotect software were used to analyze the thermal and light environment and energy consumption of the office.The results show that setting curtains in the room can effectively improve the indoor thermal light en-vironment,the higher the transmittance of curtains the lower the lighting energy consumption,the higher the number of high temperature hours of natural room temperature and the greater the radiant heat gain.The room with thick curtains has the lowest energy consumption for air conditioning in summer,followed by the room with thin curtains,and the room without curtains has the highest energy consumption for air conditioning.The room without curtains has the lowest energy consumption for artificial lighting,the room with thin curtains has the second lowest,and the room with thick curtains has the highest electricity consumption for artificial lighting.The air conditioning energy consumption accounts for the main building energy consumption,followed by the lighting energy consumption.After setting curtains in the office,the air conditioning energy consumption caused by the solar radiation heat entering the room through the exterior windows is smaller than the lighting energy consumption caused by artificial lighting.Therefore,the installation of internal shading with moderate trans-mittance and good thermal insulation performance can make the energy saving of lighting and air conditioning energy consumption reach the optimal value.

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.

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.

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.

贵州高速公路基于无极调光的隧道照明能耗测算

高速公路隧道照明在不同管控策略下能耗差异较大,当前无极调光模式下动态变化因素较多,导致测算照明能耗比较困难。为量化研究公路隧道运营过程中采用智能无极调光控制系统时的能耗水平,提出了一种基于季节、历史天气和实时洞外亮度的能耗计算模型。首先分析了公路隧道照明设计现状与不同天气工况下的调光控制策略,为公路隧道照明的能耗计算提供理论支撑;其次构建了基于季节、历史天气预测和单日实时洞外亮度变化的能耗计算模型,并以贵州省在建小寨隧道为例测算了能耗情况。结果表明,基于季节、历史天气统计与洞外亮度等因素测算的能耗能更加真实有效反映智能无极调光系统的实际运营状况,为运营管理单位实时调整照明控制策略与节能升级改造提供重要的参考依据。

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。

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。

教学楼智能灯光控制设计研究

以某教学楼为例,探讨并设计了一套基于物联网技术的智能灯光控制系统,旨在提升照明效率、优化能源使用,并创造更加舒适的学习环境。系统融合了环境光感应、人体红外探测、时间调度以及远程控制功能,通过智能化调节实现按需照明,有效降低了能耗,提高了师生的满意度。

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.

LED-21世纪照明新光源

本文简要回顾了单色LED的发展和应用 ,着重叙述了白色LED的开发和作为一般照明光源的应用前景 ,阐明了LED照明技术对节能和环保的积极影响。

NJ-6型连栋塑料温室冬季光温环境的试验研究

目前我国的大型连栋温室普遍存在着冬季保温透光性能差、能源消耗高等问题。中国农业大学设施农业工程技术研究中心在吸取具有中国特色的节能型日光温室高透光率和高采光蓄热性能等优点的基础上 ,研究设计并在山东烟台地区建造了高效节能型连栋塑料温室—— NJ6型连栋温室。对该温室冬季光温环境进行的实地试验测试与分析研究结果表明 :该温室具有良好的透光保温性能 ,冬至日前后温室综合透光率仍接近 6 0 ;在夜间不加温情况下 ,室内外温差达 10～ 14℃ ,节能效果显著。

基于NB-IoT的路灯控制系统设计

为了实现智慧路灯及城市照明节能的目的,设计基于NB-IoT技术的路灯控制系统。该系统使用NB-IoT技术实现基于一跳蜂窝网络的路灯单控方式,解决以往通信技术无法对单个路灯进行控制、控制不及时、易受干扰等问题;能够完成对路灯的电压、电流、功率及环境光强度和道路车流量等参数的测量。通过路灯管理软件可实现对单灯的实时监测与控制。经测试表明该系统具有较高的稳定性,节能效果明显。

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。

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。

La-Ce共掺杂纳米TiO_2粉体的制备及节能灯光催化性能研究

采用溶胶-凝胶法制备了La-Ce共掺杂的纳米Ti O2粉体并进行了DTA-TG、XRD表征。使用26 W照明用节能灯为光源,以罗丹明B为模拟污染物,考察了催化剂组成及热处理温度对光催化性能的影响,对粉体的晶型和光催化性能之间的相关性进行了分析。结果表明:La-Ce共掺杂能明显提高纳米Ti O2粉体在节能灯照射下的光催化活性。粉体的最佳组成为La0.075Ce0.15/Ti O2,最佳热处理温度为600℃。当罗丹明B起始浓度为10 mg/L,反应液p H值6.0,催化剂加入量5 g/L时,6 h的降解率可达96.3%。

一种基于道路照明设计的LED路灯节能改造实例研究

本文采用了一种结合灯具配光设计与道路照明设计的方法,针对特定路段进行优化。依托一种大功率且高功率密度的小型化、轻量化单颗集成式光源的LED路灯,其在光学性能和热学性能上表现优异,成功实现了长沙市某路段的LED照明节能改造。实际照明效果与道路照明设计软件模拟结果相吻合,主路平均照度(average illuminance,E_(av))由31 lx提升到39 lx,比改造前提高了23%;主路照度均匀度(Uniformity of Illuminance,UI)由0.45提升到0.8,比改造前提高了82%,且主路部分照明功率密度(Lighting Power Density,LPD)由0.89 W/m^(2)降低至0.36 W/m^(2),减小了60%;十字路口部分的LED投光灯升级改造,该路段整体节能率高达66%,阈值增量(Threshold Increment,TI)值仅为0.42%,照明舒适度大大提高,且大大延长了灯具的生命周期,具有很好的道路照明节能改造参考价值和市场推广前景。

人工光植物工厂节能技术研究进展

人工光植物工厂不受季节和土地的约束,是一种周年生产、产能倍增的高效农业生产系统,被认为是解决粮食短缺问题的重要途径。但系统运行能耗大、生产成本高一直是限制其大规模普化应用的主要“瓶颈”。照明和空调能耗占人工光植物工厂运行总能耗的82.5%以上,因此提高照明光源光效和空调能效比,对植物工厂节能降耗十分重要。本文从光源选择、光源布置、供光策略与环控方式出发,系统总结了人工光植物工厂光照与环控系统的节能技术进展,并探讨了人工光植物工厂节能生产要素,为植物工厂的快速发展与规模化应用提供参考。