V/V0变压器-高压钠灯节电照明系统

城市路灯用电量比较大,在不影响深夜道路照明的前提下,适当降低加在路灯上的电压,节电效果明显,经测算,节电率达为16．1％～17．4％。推出一种路灯自动降压控制器,控制V／V0专用路灯变压器的零线自动开断而降压节电。     

路灯自动降压控制器

城市路灯用电量相当可观。在不影响深夜道路照明的前提下 ,适当降低加在路灯上的电压 ,节电效果显著。提出一种路灯自动降压控制器。     

基于单片机控制路灯节电系统的研究

介绍了一种以单片机为核心的路灯照明智能节电系统,详述了节电原理,阐述了变压器容量和抽头设计,给出了单片机控制硬件和软件设计,包括单片机及其外围电路、电流与电压采样电路和驱动电路等硬件结构,以及控制策略和软件流程。该节电系统采用单片机改变变压器抽头,降低负载电压来实现节电,能延长灯具寿命,具有无谐波、免维护、可靠性高、成本低、节电效果明显等优点。     

一种新的用于照明系统的节电装置

在目前经常使用的节电照明装置中 ,如走廊感应灯、自动路灯等 ,存在着容量调节困难 ,不用照明时装置仍与电源相联接等缺点。本文介绍一种新的应用于照明系统的节电装置。1工作原理节电装置的电路原理如图 1所示。对于带自动断路器总开关的照明供电系统 ,可以在自动断路器上加装     

能源专利文摘

节能控制组合柜申请号:86209503(中国) 节能控制组合柜属电器控制装置。本装置根据集体宿舍寝室的多少决定其用电回路。可对走廊路灯的控制。采用晶体二极管半波整流加上整流与不整流互相切换装置,不定时地变换路灯电压,限制违章用电;对集体宿舍的常规照明和路灯用电装置进行了改进,达到节电、安全;可对集体宿舍、旅馆等类似用电系统进行科学化管理。     

节电简讯

为贯彻北京市关于进一步加强节约用电实施细则,挖掘节电潜力,北京化工机械厂投资17万元对全厂路灯照明设施进行了技术改造,收到明显节电效果。这个厂厂地面积较大,改造前多年使用白炽灯做为光源,造成电能消耗高,照明效果差,电压不稳,灯泡容易损坏等现象,全厂路灯照明负荷高达50KW。针对这些问题,这个厂首先更换照明灯具,将白炽灯改用低压纳灯,同时选用 DK     

公共建筑照明节电控制系统的设计与开发

通过分析公共建筑照明特点,建立照明节电控制的系统模型,给出软硬件、通信网络以及上位机的实现方法,设计满足实际应用的照明节电控制系统。该照明节电控制系统具有集中管理、分散控制的特点,可根据室内采光情况和人流量密度等环境参量,制定相应的照明控制策略,从而实现照明节电控制。照明节电控制系统根据不同应用场合的照明特点,采用分区域、分时间的自动控制,节约用电量;还可以在特殊情况转为手动控制,可以实时监控节电控制装置和末端用电设备的状态,并远程控制,提供最优化的节电状态及更人性化的照明效果,明显提高照明用电效率,提升公共建筑照明系统的节电空间。     

高压钠灯电压优化及节电应用

根据高压钠灯在不同电压下的照度及寿命特性,推导出路灯半夜灯的最佳供电电压。通过对照明灯具从承受相电压变至线电压一半的自动转换,实现高压钠灯供电电压的优化,从而实现照明节电。     

地下空间照明节电设计综述

地下空间照明具有十分重要的作用.本文针对地下空间的特点,阐述了照明设计、照明运行和照明控制管理方面的节电潜力,探讨了适用于地下空间的照明节电技术.     

基于物联网的太阳能LED路灯智能照明云控制系统的设计与研究

针对传统太阳能LED路灯照明系统普遍存在的故障判断困难、巡检难度大、人力成本高等问题,设计开发了一种具有远程智能化控制的基于物联网的太阳能LED路灯智能照明云控制系统;从系统构架、硬件设计、平台建设、实验测试等方面,详细介绍了该云控制系统的设计与研究过程,并对该云控制系统的运行工况进行了实验测试。测试结果表明：基于物联网的太阳能LED路灯智能照明云控制系统可随时掌握太阳能LED路灯的运行工况并进行远程控制,及时发布故障警示,可满足道路照明智能化监测、运维的需要,实现了远程智能化控制,具有广阔的应用前景。     

商业照明环境与节能潜力分析

在商业建筑中 ,照明能耗约占到建筑总能耗的 1/3,照明节能是商业建筑节能的重要环节。本文分析了商业照明环境与消费行为的关系 ,指出营造一个良好的照明环境能促使消费行为的完成 ,但同时还应该重视照明系统的节能功能 ;分析了照明节能的四个途径 :光源的合理选择、自然光的合理利用、空间照度的合理设计和照明系统的合理控制与管理     

Economic analysis of the daylight-linked lighting control system in office buildings

The objective of this study is to perform an economic analysis of the daylight-linked automatic on/off lighting control system installed for the purpose of energy savings in office buildings. For this, a building was chosen as a typical example, and the energy cost was calculated by using the daylight and building energy analysis simulation. When the lighting control was utilized, an economic analysis was performed using a payback period that was calculated by comparing the initial cost of installing the lighting control system with the annual energy cost which was reduced thanks to the application of the lighting control.The results showed that the lighting energy consumption, when the lighting control was applied, was reduced by an average of 30.5% compared with the case that there was not lighting control applied. Also, the result for total energy consumption showed that, when lighting control was applied, this was reduced by 8.5% when the glazing ratio was 100%, 8.2% for 80%, and 7.6% for 60% when compared to non-application. The payback period was analyzed in terms of the number of floors in a building; 10 floors, 20 floors, 30 floors, and 40 floors. Hence, the building with 40 floors and glazing ratio 100% resulted in the shortest payback period of 8.8 years, the building with 10 floors and glazing ratio 60% resulted in the longest period of 12.7 years. In other words, the larger the glazing ratio and the number of building floors are, the shorter the payback period is.     

The impact of shading design and control on building cooling and lighting demand

Shading should be considered as an integral part of fenestration system design for commercial and office buildings, in order to balance daylighting requirements versus the need to reduce solar gains. In this paper, the simultaneous impact of glazing area, shading device properties and shading control on building cooling and lighting demand was calculated using a coupled lighting and thermal simulation module. The interactions between cooling and lighting energy use in perimeter spaces were evaluated as a function of window-to-wall ratio and shading parameters. An exterior roller shade was used as an example. The impact of shading device type, properties and control on building cooling and lighting energy demand was quantified and analyzed. The simulation results indicate that, if an integrated approach for automatic control of motorized shading is used in conjunction with controllable electric lighting systems, substantial reduction of energy demand for cooling and lighting could be achieved in perimeter spaces, depending on climatic conditions and orientation.     

Energy saving in the street lighting control system—a new approach based on the EN-15232 standard

The street lighting is one of major components in total energy consumption in cities. The paper is focused on a concept of street lamp control systems and function organization with remote monitoring, to reduce maintenance costs and energy consumption. A new approach to the definition of functional strategy organization for outdoor lighting systems is introduced in the paper. Proposed functional strategies are based on four efficiency classes of building automation and control systems (BACS) defined in the EN 15323 standard. They have been formulated, analysed and eventually implemented and verified in real experiment street lighting installation. This outdoor lighting system, designed by the authors, based on LonWorks (the ISO/IEC EN 14908) platform with a power line communication aimed to control high-pressure sodium lamps. The street lamps are integrated nodes of a building management system (BMS). The results of experimental tests for the proposed functional strategies, implemented with various control scenarios, show that they provide a great potential in reducing energy consumption by street lighting installations. In particular, the energy use can be reduced even by 45 % in comparison to conventional street lighting system, especially without the use of monitoring and control.     

Lightswitch-2002: a model for manual and automated control of electric lighting and blinds

A simulation algorithm is proposed that predicts the lighting energy performance of manually and automatically controlled electric lighting and blind systems in private and two-person offices. Algorithm inputs are annual profiles of user occupancy and work plane illuminances. These two inputs are combined with probabilistic switching patterns, which have been derived from field data, in order to predict the status of the electric lighting and blinds throughout the year. The model features four different user types to mimic variation in control behavior between different occupants.An example application in a private office with a southern facade yields that––depending on the user type––the electric lighting energy demand for a manually controlled electric lighting and blind system ranges from 10 to 39 kW h/m² yr. The predicted mean energy savings of a switch-off occupancy sensor in the example office are 20%. Depending on how reliably occupants switch off a dimmed lighting system, mean electric lighting energy savings due to a daylight-linked photocell control range from 60% to zero.     

太阳能与高亮LED的集成应用

主要分析了当前太阳能照明的几种类型,并以太阳能LED照明系统为例,从中间环节考虑能耗的降低、性能的稳定,并从照明的有效控制入手,改善电路的控制部分,从而提高太阳能LED灯的节能性和经济性。     

楼宇自动化控制与节能

简要介绍了楼宇自动化控制系统,中央空调与照明系统的控制过程与楼宇管理的节能措施。     

天然采光对建筑能耗影响的研究

在定性分析天然采光对建筑能耗影响的基础上,以一天窗建筑为研究对象,利用eQUEST能耗模拟软件为工具,分析了结合照明控制的天窗采光对夏季供冷峰值负荷及建筑各用能项如照明、供冷、供热的能耗影响,探讨了天窗透光率、照明密度、照明控制方式对建筑能耗的影响,并针对不同气候地区的典型城市探讨了昼光照明的气候差异性。     

The benefits of the transition from fossil fuel to solar energy in Libya: A street lighting system case study

The Libyan economy is dominated by the oil and the gas industry which are considered as the primary energy sources for the generating power plants. With the increased energy demands in the near future, Libya will be forced to burn more oil and gas. This, in turn will result in reducing the country revenue, threatening the economy and increasing the CO₂ emission. This triggers the alarm for Libya to an urgent plan to diversify the energy sources through using sustainable energy. The sun showers Libya every day by a huge amount of sunshine, especially during the peaks in the summer days. Recently, the country has been struggling to satisfy its escalating energy demands. The residential and street lighting loads constitute more than 50% of the electricity demands in Libya. Street lighting consumes more than 3.996 TW h, which is around one fifth of the energy demands in Libya. Energy conservation and transition from fossil fuel to renewable energy could have significant profit on the energy sector in Libya. For example, Libya is still relying on the old-fashioned, inefficient and unsustainable street lighting systems. Replacing the old technology lighting systems with up-to-date solar powered lighting system can achieve energy saving and sustainability. In this paper, improving the energy situation in Libya through replacing the high pressure sodium street lighting systems with solar powered LED street lighting systems is investigated. A four km road is chosen as a case study. Four alternatives are analyzed; grid-powered high pressure sodium lamp street lighting system, grid-powered LED lamp street lighting system, stand-alone solar powered LED street lighting system and grid-connected solar powered LED street lighting system. The four options are compared in terms of the capital cost, maintenance cost, total cost, fuel cost and the CO₂ emission. Replacing the high pressure sodium lamp system with LED lamp system saves 75% of energy and reduces the CO₂ emission by 75%. The stand-alone solar powered LED lighting system cuts the CO₂ emission, saves the fuel and is economically feasible. Furthermore, improvement is attained if the solar powered lighting system is connected to the grid where the excess energy is fed to the grid. The two solar powered options are economically feasible and sustainable.     

Economic evaluation of energy saving measures in a common type of Greek building

This paper deals with the economic analysis and evaluation of various energy saving measures in the building sector, focusing on a domestic detached house in Greece, i.e. in a typical Mediterranean climate. In order to detect the energy saving measures that, in addition to energy benefits, can also provide economic profits, the study examines the following measures: all kinds of insulation; upgrading of the heating system; use of thermal solar systems; upgrading of lighting; upgrading of electric appliances; upgrading of the cooling system. The economic evaluation methods used for ranking the energy saving measures are the Net Present Value, the Internal Rate of Return, the Savings to Investment Ratio and the Depreciated Payback Period. It has been found that amongst the most effective energy saving methods are the upgrading of lighting, the insulation of the roof of the building and the installation of an automatic temperature control system.