北京多措并举强化节能

"倡议书"拉开节能全民行动大幕 国庆,首都繁花似锦、红旗飘扬,市民欢歌笑语共庆佳节,一则"倡议书"在国庆假期的第二天怦然而出上了"热搜",成为市民关注的焦点. 10月2日,首都精神文明建设委员会办公室、北京市城市管理委员会、北京节能环保中心共同发布《关于全市节能节电的倡议书》(简称"倡议书"》).倡议书提出,北京市各级党政机关、企事业单位和社会单位率先垂范、带头践行绿色节能办公.倡导各单位充分利用自然光照明,尽可能降低照明强度,减少照明时间;同时要加强办公设备节电管理,及时关闭办公设备、办公区域电源,机关办公场所倡导使用步行梯,减少使用电梯.倡议书还提出,北京全市暂停灯光秀、压减夜间景观照明时间.北京节能全民行动大幕自此拉开.     

福建出台公共建筑、照明节能改造合同能源管理办法

近日,福建省住房和城乡建设厅出台了《福建省公共建筑、城市照明节能改造合同能源管理暂行办法》。指出公共机构在实施公共建筑、城市照明节能改造时．应优先采用合同能源管理模式．鼓励大型公共建筑节能改造采用合同能源管理。     

厦门开展节能改造升级

<正>厦门市将要在5年内完成25万盏LED路灯节能改造和190万m~2公共建筑节能改造。城市公共照明重点改造光源、灯罩和控制系统,加快推广应用LED照明产品。随着节能改造升级,厦门未来将进一步迈向绿色环保,LED灯具让厦门这个美丽的海滨城市变得更美丽。     

绿色照明节约电能保护环境

概述了绿色照明的涵义、绿色照明的内容和绿色照明与保护环境的关系,介绍了中国绿色照明工程的概况;提出了照明节能的措施和方法;了电数字说明了节能措施的节能效果及其所产生的经济、环境和社会效益。     

建筑物景观照明技术的节能探讨

归纳叙述景观照明的节能措施,就节能效果方面探讨对不同被照物的不同颜色、不同的材料反射特性以及不同的照明方式下对光源、灯具、灯位的选择。     

广西城乡道路推用LED节能产品

正广西住建厅出台了《城市照明与建设管理工作方案》,全区市县大力推进城市照明建设和节能改造,年内基本完成城市中高能耗、高污染的汞灯、白炽灯等产品的淘汰改造,主要使用LED节能产品,确保实现年节电3%的目标。     

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     

量相频移脉宽调制(F-PWM)调光

随着经济的高速发展,能源需求的矛盾越来越严重,照明用电占社会总电能消耗的20%,因此提高照明效率、节约能源已经成为缓解用电紧张状况的重要手段之一,高效节能、环保、长寿命的LED发光二极管)照明产品被越来越多地应用于城市照明工程。因此如何减少照明用电作为一个重要问题被提到议事日程上来。幸好出现了高效节能的     

农村建筑的节能照明

在调研的基础上,指出农村建筑电气照明存在的问题。在设定的照明条件下,测算出节能荧光灯和白炽灯的能耗;定量分析了节能荧光灯等设备的节能效果;介绍了确定照明光源功率、优选高效低耗灯和推广使用电子镇流器等问题。     

从路灯控制管理谈城市照明节能

叙述了再路灯管理方面可实现的节能措施和城市照明控制管理技术的发展。     

An analysis of lighting energy savings and switching frequency for a daylit corridor under various indoor design illuminance levels

Visual comfort and electric lighting energy issues are essential criteria to justify daylighting schemes. The evaluation of energy efficiency due to daylight linked lighting control systems is best demonstrated by case studies. This paper presents field measurements on daylighting for a fully air-conditioned daylit corridor. Artificial lighting load, brightness of the fluorescent luminaires, daylight availability for various switching illuminance levels were systematically recorded and analyzed. The general features and characteristics of the findings including the number of switching operations and electric-lighting energy savings are presented and discussed. Daylighting theories, using cumulative frequency distribution of outdoor illuminance and regression models based on brightness of light output, outdoor illuminance and electric light power to estimate daylight-linked lighting control savings, have been developed and assessed. It has been found that data from both approaches show reasonably good agreements with measured results. The findings from this study provide some operational and energy information, which would be useful and applicable to other interior spaces with similar architectural designs.     

TS－BUS智能照明系统在机场中节能应用

结合实际案例,介绍了最新的南京天溯TS－BUSKNX智能照明技术及该技术在机场照明中的智能节能应用,通过TS－BUS智能照明系统,可实现远程网络监管,同时实现根据照度、时间等来进行实时开闭,实时联动,节省了人力,节约了能源。     

建筑照明设计中的节能措施

分析当前在照明节能设计中存在的问题,通过对照度确定与计算、合理选择光源、灯具、镇流器以及照明控制方式等方面的探讨,总结并提出照明节能设计的具体措施。     

Evaluation of a large dish‐type concentrator solar lighting system for underground car park

To utilize solar energy more efficiently and reduce lighting power consumption in underground public spaces such as car park, a large dish‐type concentrator solar lighting system is put forward along with its evaluation, which is a unique design to apply a laminated layer of beam split thin‐film coating and thin‐film solar cells onto the dish reflector. The collected sunlight is split into 2 parts, one being reflected into a fiber optical bundle and transmitted for daylighting, while the rest being absorbed by solar cells for electricity generation as the other way to replenish daylighting. A set of 4 solar lighting systems using 3.28‐m diameter dish are designed to meet the lighting requirement in a 1771‐m² underground car park. A mathematical model is adopted to calculate the output power and conversion efficiency of solar cells distributed on the parabolic dish surface. The indoor illuminance distribution is given by lighting simulation. The results indicate that the average daylight illuminance in the car park can vary between 62.7 and 284 lx on February 25, 2016 and between 62.7 and 353 lx on August 17, 2016 for 2 chosen days, respectively. For the presented design, the electricity produced by solar cells is just enough to power light‐emitting diodes for lighting meeting a criterion at night. Considering about 19% conversion efficiency of solar cells and the efficacy of 129.5 lm/W of light‐emitting diodes, the hybrid solar lighting system can have about 40% utilization ratio of solar energy, so it can be concluded that a sufficient lighting provision can be provided by the proposed large dish‐type concentrator solar lighting system for applications in underground car park.     

A methodology for investigating the effect of a south oriented surface on natural illuminance received on north oriented glazing of a top lighting system under clear sky conditions

A methodology for investigating the effect of a south oriented surface with varying inclination angle in reflecting natural light towards a north oriented glazing of a top lighting system is proposed for use under clear sky conditions. This was done based on mathematical simulation for a top lighting system. Results have shown the importance of the reflective surface in increasing the illuminance received on the glazing of the top lighting system.     

Daylighting and energy analysis for air-conditioned office buildings

We propose a simple method for estimating the likely energy savings in electric lighting due to daylighting and the possible cooling penalty. Fractions of the working year and cooling season when daylighting alone is adequate to provide the indoor design illuminance are presented for on-off and top-up controls. Based on the simple average daylight factor method, energy savings in electric lighting have been estimated for a generic office building using measured outdoor illuminance data in Hong Kong. The daylight-induced cooling penalty is estimated using average solar heat gain factors. Our case study suggests that daylighting schemes can result in substantial energy savings in air-conditioned office buildings in Hong Kong.     

Automated demand response system in lighting for optimization of electricity cost

Daylighting is an important factor in improving visual comfort and energy efficiency. Lighting control using daylighting can reduce energy consumption in buildings. This thesis proposes an automatic demand response system for lighting based on wireless sensor networks (WSN) in order to reduce the peak electricity demand according to the stage of electricity rate with real-time pricing (RTP), time of use pricing (TOUP), and critical peak pricing (CPP). The proposed system automatically controls the slat angle of the venetian blind with a cut-off angle according to the altitude of the sun, automatically executing light dimming according to measured current luminance to remove an unpleasant glare caused by daylighting. The target illuminance of area at this time is set at a minimum illuminance required for the work execution in the office during the time zone where the electricity load is high to save the lighting energy cost, while a maximum illuminance is set during the time zone where the electricity load is low according to the real-time electricity pricing stages obtained through the advanced metering infrastructure (AMI) in order to improve the work efficiency of the occupants. In this study, two testbeds having the same environments, as well as a control system targeting a fixed illuminance per price system, were established. The illuminance energy consumption and cost were then measured and the effect of the proposed illuminance system was evaluated.     

A review of daylight illuminance determinations and energy implications

Daylighting is recognized as an important element in architecture and a useful strategy in energy-efficient building designs. Daylight gives a sense of cheeriness and brightness that can have a significant positive impact on the people. There is a scope for integrating daylight with electric light to reduce building energy use. The amount of daylight entering a building is mainly through window openings, which create in the indoor environment a more attractive and pleasing atmosphere, in addition to maximise visual access to the pleasant views of the outside world. Determinations of the exterior and interior daylight and lighting energy savings are key issues to demonstrate the benefits based on daylighting designs. This paper provides a review of daylight illuminance determinations and the lighting energy reductions due to daylighting schemes. The study includes daylight measurements, prediction of daylight illuminance under various sky conditions and potential electric lighting energy savings from daylight-linked lighting controls. The article aims at providing building professionals, practitioners and researchers more information and a better understanding of daylight for promoting effective daylighting designs and evaluations.     

Performance prediction and design optimisation of an integrated light pipe and artificial lighting system

This paper describes recent research on the prediction of the performance of light pipes and the ways to optimise their design, in order to house artificial lighting, able to supplement daylight in a space. The research has resulted in an algorithm, for the easy and quick calculation of the interior illuminance provided by light pipes, and in a procedure for the calculation of the power of the necessary artificial lighting (light emitting diodes [LEDs]) and the energy savings for lighting, due to the daylight provided by the light pipes and the daylight linked controls of the LEDs.     

Estimation of exterior vertical daylight for the humid tropic of Kota Kinabalu city in East Malaysia

In tropical regions natural daylight has been a fundamental factor in building design. It is the most efficient way of lighting a building in the daytime and has a great potential for energy conservation in buildings. In Malaysia there are a limited available data of measured illuminance which is the case of several regions in the tropics. Using established models it is possible to predict the luminous efficacy and then estimate the monthly mean hourly exterior illuminance. In this study two different models were chosen. The Perez and Du Mortier–Perraudeau–Page–Littlefair models were selected for the prediction of hourly exterior horizontal illuminance for the city of Kota Kinabalu in East Malaysia. Comparison between the two models were made. The vertical hourly illuminance was predicted also using Perez approach. The potentiality of daylight in four orientations was discussed. This study highlights the importance of Sunpath diagram on daylight illuminance during the conceptual design stage. The results in this study is hoped to contribute further insight into the potentiality of daylighting of tropical sky.