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Tuesday, July 21, 2020 | History

2 edition of Predicting time-varying illuminance in complex spaces with lighting control systems found in the catalog.

Predicting time-varying illuminance in complex spaces with lighting control systems

Paul Cropper

Predicting time-varying illuminance in complex spaces with lighting control systems

by Paul Cropper

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Published by De Montfort University in Leicester .
Written in English


Edition Notes

Thesis (Ph.D) - De Montfort University, Leicester 2001.

StatementPaul Cropper.
ContributionsDe Montfort University.
ID Numbers
Open LibraryOL19224107M

Implementation to Provide Individual Illuminance and Color Temperature in an Intelligent Lighting System by Estimating the Color Temperature Ryohei JONAN 2, Mitsunori MIKI 1, Shinya DAINAKA2, Sota NAKAHARA, and Hiroto AIDA 1Department of Science and . An Intelligent Lighting System providing desired illuminance distributions at minimum electrical power was constructed in the actual office environment. The place of construction is the Area Planning Office in the headquarters building of Mitsubishi Estate Co., Ltd. in Otemachi, by:

Analyzing Illuminance Data in LED Lighting Technology Dr. M. Nisa Khan, President and Managing Member, IEM LED Lighting Technologies Dr. Nisa Khan has been performing pioneering optical research for over 25 years which includes her previous work at Honeywell Solid State Research Center and at AT&T Bell Laboratories (now Alcatel Lucent). Lighting Analysts has considered knowledgeable, accessible and friendly customer support our hallmark since day one. We will help get your started, learn copiously and pick you up when you stumble, and our perpetual software maintenance is unheard of in today’s world.

Existing Lighting System Analysis & Lighting Design Criteria For Selected Spaces The spaces that do feature extensive lighting control systems are the Atrium, the Humanities Common Room, and the Lecture Hall, all of which will be above the floor (the height of the workplane). The average illuminance for the space was 99 fc, with a. Balancing Daylight, LEDs, and Controls: The Future of Lighting for Designers The authors sought to use time varying illuminance predictions (similar to those used for meteorological data) to predict a more realistic account of daylighting conditions. conditions to apply to lighting control : Lisa A. VanZee.


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Predicting time-varying illuminance in complex spaces with lighting control systems by Paul Cropper Download PDF EPUB FB2

Based on the calculation of lighting coefficients, the numeric relationship between the luminance of light sources and the illuminance they produce, the Dynamic Lighting System (DLS) is able to calculate time-varying illuminance from a combination of natural light and artificial lights controlled by Author: Paul Cropper.

Predicting time-varying illuminance in complex spaces with lighting control systems. By Paul Cropper. Download PDF (29 MB) Topics: Author: Paul Cropper.

Predicting time-varying illuminance in complex spaces with lighting control systems. By P. Cropper. Abstract. Available from British Library Document Supply Centre-DSC:DXN / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo ARTIFICIAL LIGHTING, MODELLING Author: P.

Cropper. • Daylight illuminances in the range lux to lux are considered effective either as the sole source of illumination or in conjunction with artificial lighting. • Daylight illuminances in the range lux to lux are often perceived either as desirable or at least Size: KB.

A new prediction method with an interior light sensor for the workplane illuminance in daylighting control systems is introduced. Based on radiosity theory, the spatial distributions of daylight and electric light in the space are discussed and the prediction method is.

IESNA Lighting Design Guide Interior-1 I. INTERIOR Very Important Somewhat important Blank = Not important or not applicable LOCATIONS AND TASKS Design Issues Appearance of Space and Luminaires Color Appearance (and Color Contrast) Daylighting Integration and Control Direct Glare Flicker (and Strobe) Light Distribution on Surfaces Light Distribution on Task Plane (Uniformity) File Size: KB.

Useful Daylight Illuminance (UDI) is a modification of Daylight Autonomy conceived by Mardaljevic and Nabil in This metric bins hourly time values based upon three illumination ranges, lux, lux, and over lux.

6 LIGHTING CONTROL SYSTEMS 6 Lighting control systems Introduction A building can be compared to a system with a variety of physical processes interacting with each other and with the environment. From the control point of view, it is considered as having multi-variant dynamic subsystems showing linear or non-linear Size: 1MB.

Specifically, the minimum illuminance level will be set to the target room illuminance defined by the NCM activity. The lighting gain will be at its maximum value (all lights are on) when the illuminance level in the zone is equal to the target room illuminance.

Below this illuminance level all lights will be off and the lighting gain will be zero. Lighting Units and Quantities. Illuminance is the amount of light coming from a light fixture that lands on a surface. It is. measured in Footcandles (Lux in the metric system).

A typical office has an illuminance of. between 30 to 50 footcandles ( to lux) on desktops. Figure 1 - Illuminance. The overall energy saved was 93% or 21 kW h in the four corridors on 9/F with daylight-linked lighting control systems when the illuminance was set at lx.

Fig. 10 displays the energy savings by by: CONTROL SYSTEMS Control is used to modify the behavior of a system so it behaves in a specific desirable way over time. For example, we may want the speed of a car on the highway to remain as close as possible to 60 miles per hour in spite of possible hills or adverse wind; or we may want an aircraft to follow a desired altitude, heading.

An Intelligent System for Energy-Efficient Lighting and Illuminance Control in Buildings by Sepehr AttarchiMazandaran University, Thesis Submitted in Partial Fulfillment of the Requirements for the Degree of Master of Applied Science in the Mechatronic Systems Engineering Faculty of Applied Science Sepehr Attarchi For a design illuminance of 50 footcandles, the power density of the general lighting system would be times watts per square foot, or watts per square foot.

This is larger by a factor of than the task/ambient power density of watts per square foot, corresponding to the highest occupancy density and a task power allocation of 40 watts per station. You measure illuminance as the amount of light that falls on a surface in units of foot-candles or lux.

1 lux, the SI unit, is equal to about foot-candles. 1 lux is also equal to 1 lumen/m 2 in which lumen is a measure of luminous flux, the amount of visible light a source emits per unit of time, and 1 lux also equals phot (ph).These units let you use a wide range of scales for.

Individual Lighting Control: Task Performance, Mood, and Illuminance Article in Journal of the Illuminating Engineering Society 29(1) September with.

describes new and innovative technologies for utilizing daylight in buildings and assesses the performance of these systems. This information is of particular benefit to building design practitioners, lighting engineers, product manufacturers, building owners, and property managers.

Illuminance is measured as the amount of light striking a surface. The incident light. If we had a light meter and wanted to measure the amount of light that was striking the surface we were measuring, we would hold the little white bubble towards the device shooting the light.

white light LEDs became available in various shades. LEDs began competing with conventional light sources and fixtures in general illumination applications.

The Department of Energy expects LED technology to become the preferred method of lighting in homes and offices by File Size: 1MB. Individual users set the illuminance constraint on the illuminance sensors. At this time, each light repeats au- tonomous changes in luminance to converge to an optimum ligthing pattern.

Also, with the intelligent lighting system, positional information for the lights and illuminance sensors is unnecessary. Designing and controlling lighting systems become more and more complex.

Focusing on the control problem a rule-based control system is proposed. The system allows to control such lighting systems with high level control logic constituting so-called profiles.

The profiles express lighting system behavior under certain conditions defined with by: 3.of control and aesthetics. Centralized Lighting Control System How to Lay Out a System 88 For example, use Wallstations in the Board Room and Cafeteria for local lighting control.

Use occupancy sensors in the Employee Lounge for energy-saving control. Use Photosensors in the Lobby for daylight compensation and Size: KB.1 Lighting in schools Truus de Bruin-Hordijk1 en Ellie de Groot2 1 Climate Design/Building Physics, Faculty of Architecture, TU Delft, The Netherlands 2TNO Built Environment and Geosciences, Business Unit Building and Systems, The Netherlands.

INTRODUCTION Good quality of light plays a significant role in the psychological and biological processes of humanFile Size: KB.