Intelligent household LED lighting system considering energy efficiency and user satisfaction

2013 ◽  
Vol 59 (1) ◽  
pp. 70-76 ◽  
Author(s):  
Jinsung Byun ◽  
Insung Hong ◽  
Byoungjoo Lee ◽  
Sehyun Park
Keyword(s):  
Energy Efficiency ◽  
User Satisfaction ◽  
Lighting System ◽  
Led Lighting

scholarly journals Towards DC Energy Efficient Homes

2021 ◽  
Vol 11 (13) ◽  
pp. 6005
Author(s):  
Daniel Villanueva ◽  
Moisés Cordeiro-Costas ◽  
Andrés E. Feijóo-Lorenzo ◽  
Antonio Fernández-Otero ◽  
Edelmiro Miguez-García
Keyword(s):  
Energy Efficiency ◽  
Electric Vehicles ◽  
Energy Efficient ◽  
Electricity Consumption ◽  
Real Data ◽  
Mean Values ◽  
Led Lighting ◽  
Shed Light

The aim of this paper is to shed light on the question regarding whether the integration of an electric battery as a part of a domestic installation may increase its energy efficiency in comparison with a conventional case. When a battery is included in such an installation, two types of electrical conversion must be considered, i.e., AC/DC and DC/AC, and hence the corresponding losses due to these converters must not be forgotten when performing the analysis. The efficiency of the whole system can be increased if one of the mentioned converters is avoided or simply when its dimensioning is reduced. Possible ways to achieve this goal can be: to use electric vehicles as DC suppliers, the use of as many DC home devices as possible, and LED lighting or charging devices based on renewables. With all this in mind, several scenarios are proposed here in order to have a look at all possibilities concerning AC and DC powering. With the aim of checking these scenarios using real data, a case study is analyzed by operating with electricity consumption mean values.

Assessment of energy efficiency in college of engineering (COE) building, Universiti Tenaga Nasional (UNITEN) Putrajaya using light-emission diode (LED) lighting

2018 ◽  
Author(s):  
Daud Mohamad ◽  
Mohd Zakwan Ramli ◽  
Nazirul Mubin Zahari ◽  
Mohd Hafiz Zawawi ◽  
A. H. N. Haneesa ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Light Emission ◽  
Led Lighting ◽  
College Of Engineering

scholarly journals Destabilization of Immersed Dense Granular Material Submitted to Localized Fluidization: An Experimental and Numerical Study

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Aboubacar Sidiki Dramé ◽  
Li Wang ◽  
Yanping Zhang
Keyword(s):  
Granular Material ◽  
Granular Medium ◽  
Experimental Approach ◽  
Solid Phase ◽  
Numerical Study ◽  
Lighting System ◽  
Led Lighting ◽  
Hydrogel Beads ◽  
Static Regime ◽  
As Solid Phase

An alternative experimental approach and a numerical analysis for the study of destabilization by localized fluidization of an immersed dense granular material are presented. To visualize the evolutions of the internal structure of the granular medium, the hydrogel beads, composed of about 99% of water and having substantially the same refraction indexes, are used as solid phase. A LED lighting system is used in place of a laser lighting system. As a result, the optical access restriction of porous structure is removed. A real economic alternative for the experimental study of fluid-grain coupling during destabilization by localized fluidization of a granular material is created. The experimental phenomenology presented in the literature is verified: the system passes successively through three different stationary regimes: static regime, fluidized cavity regime, and fluidized chimney regime. Some restrictions of using hydrogel beads as particles in the study of liquid-solid interaction are also discussed.

scholarly journals Optical Characterization of Japanese Papers for Application in the LED Lighting System with Human Sensitivity

2008 ◽  
Vol 32 (2) ◽  
pp. 218-221 ◽  
Author(s):  
Atsushi MOTOGAITO ◽  
Katsuhide MANABE ◽  
Yuuki YAMANAKA ◽  
Narito MACHIDA ◽  
Hideto MIYAKE ◽  
...  
Keyword(s):  
Optical Characterization ◽  
Lighting System ◽  
Led Lighting
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