scholarly journals Measuring aggregate electricity savings from the diffusion of more efficient lighting technologies

2021 ◽  
Vol 14 (7) ◽  
Author(s):  
Julián Moral-Carcedo ◽  
Julián Pérez-García
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Energy Savings ◽  
Electricity Consumption ◽  
Electricity Demand ◽  
Policy Measure ◽  
Halogen Light ◽  
Short Period ◽  
Main Driver ◽  
The Eu

AbstractIncreasing concerns about sustainability and energy conservation, coupled with the proliferation of incentives in the EU to achieve energy savings, suggest that significant improvements in energy efficiency should be realized. A policy measure that should have a direct impact on energy savings is the replacement of incandescent and halogen light bulbs by more efficient lighting technologies, which was implemented in 2009. Due to the lack of detailed data, it is not feasible to measure the effect of energy-efficient improvements on electricity consumption at the aggregate level using a bottom-up approach. To overcome this limitation, this paper analyzes hourly electricity demand in a very specific period of the day: the transition from day to night. In this short period, it is plausible that lighting is the main driver of changes in electricity demand, thus making it possible to estimate the increase in electricity consumption when lights are switched on and to analyze the effects of higher energy efficiency in lighting, if any. The results of the analysis for Spain show that during the periods 2009–2011 and 2015–2016, an estimated energy savings of 251 GWh can be attributed to a reduction in the magnitude of the lighting effect, which accounts for 20.3% of the observed decrease in electricity consumption during these two periods.

Energy Efficiency Measures for a High-Tech Building with a Solar Roof

2014 ◽  
Vol 1073-1076 ◽  
pp. 1233-1238
Author(s):  
Yao Lin Lin ◽  
Wei Yang ◽  
Ming Sheng Liu
Keyword(s):  
Energy Efficiency ◽  
Energy Savings ◽  
Electricity Consumption ◽  
Electricity Demand ◽  
High Tech ◽  
Solar Panels ◽  
Electrical Grid ◽  
Energy Efficiency Measures ◽  
Efficiency Measures ◽  
Demand Reduction

This paper presents the implementation of energy efficiency measures in a building that consists of office, lab and clean room area. Total Performance Oriented Optimization and Retrofits (TPORs) were implemented. 594 kW solar panels were installed on the roof and connected to the electrical grid during the optimization process. Ten power meters were installed throughout the building to measure the total building electricity demand, solar generated electricity demand, HVAC and non-HVAC-equipment demand to quantify the energy savings from the implementation of the energy efficiency measures and savings from the solar panels. The electricity savings from optimization on the HVAC system is about 7,209,000kWh/year (194.4kWh/m2-year), which is about 30% of the total building electricity consumption with peak demand reduction of 935 kW. There savings come from the solar panel is 811,925 kWh/yr; however, it effectively reduced the peak electricity demand by 302.6 kW.

scholarly journals Opportunities in Otaki for Improved Energy Efficiency in Retail Lighting and Its Offsetting through Renewable Resources

2021 ◽  
Author(s):  
◽  
Quinten Heap
Keyword(s):  
Energy Efficiency ◽  
Renewable Resources ◽  
Energy Savings ◽  
Electricity Consumption ◽  
Capital Requirements ◽  
Electricity Demand ◽  
Urban Setting ◽  
State Highway ◽  
Energy Audits ◽  
Pv Generation

<p>In 2010 the town of Otaki decided to go "Off the Grid", obtaining all its electricity supply from renewable resources. To support this goal, this thesis documents and quantifies the electricity demand for the Otaki retail stores along State Highway 1. It was found the majority of the load in these 33 stores was for lighting. To minimise the renewable electricity generation capital requirements, the load was optimised by exploring energy efficiency opportunities. Energy audits to AS/NZS 3598:2000 Energy Audit Level 2 were undertaken in 23 of the stores. These created a consistent set of data on the lighting load and energy consumption. Potential energy savings opportunities were then identified to reduce the lighting load by 26% through lamp replacement and removal. When combined with improved lighting management, these could reduce annual electricity consumption by 34% to 248,321 kWh. An investigation of available renewable resources (Photovoltaic (PV), wind and hydroelectric) found that PV generation was the most suitable for this urban setting. PV generation using 53 by 4 kW panels, at a capital cost of $1.3 million, which would generate 250,425 kWh per year. This would meet the annual electricity demand, but there would be a summer surplus and winter deficit. The absence of net metering provision makes this option uneconomic, although the creation of an Otaki mini-grid may be a viable alternative.</p>

Leds, toward the Best Energy Efficiency in Lighting

2010 ◽  
Vol 107 ◽  
pp. 93-97
Author(s):  
José M. Portela ◽  
Andrés Pastor ◽  
Milagros M. Huerta ◽  
Manuel Otero ◽  
Rafael E. González
Keyword(s):  
Climate Change ◽  
European Union ◽  
Energy Efficiency ◽  
Greenhouse Gases ◽  
Energy Efficient ◽  
Energy Savings ◽  
Energy Prices ◽  
The European Union ◽  
The Future ◽  
The Eu

Climate change and increasing energy prices threaten the planet and the economy. The European Union has promised to take the lead, through a reduction in greenhouse gases by 20 to 30% and a 20% energy savings by 2020. In this context, the EU is about to ban some of the most inefficient lightbulbs for everyday. Lighting would set the limit at the level of CFLs/LEDs (most energy efficient existing lamps). The energy savings would be maximized, the target is 86 TWh of electricity saved per year in the EU by 2020. To discover how to use different materials in this technology is a high-priority as it shows the advance; maybe this is the future of lighting.

scholarly journals Opportunities in Otaki for Improved Energy Efficiency in Retail Lighting and Its Offsetting through Renewable Resources

2021 ◽  
Author(s):  
◽  
Quinten Heap
Keyword(s):  
Energy Efficiency ◽  
Renewable Resources ◽  
Energy Savings ◽  
Electricity Consumption ◽  
Capital Requirements ◽  
Electricity Demand ◽  
Urban Setting ◽  
State Highway ◽  
Energy Audits ◽  
Pv Generation

<p>In 2010 the town of Otaki decided to go "Off the Grid", obtaining all its electricity supply from renewable resources. To support this goal, this thesis documents and quantifies the electricity demand for the Otaki retail stores along State Highway 1. It was found the majority of the load in these 33 stores was for lighting. To minimise the renewable electricity generation capital requirements, the load was optimised by exploring energy efficiency opportunities. Energy audits to AS/NZS 3598:2000 Energy Audit Level 2 were undertaken in 23 of the stores. These created a consistent set of data on the lighting load and energy consumption. Potential energy savings opportunities were then identified to reduce the lighting load by 26% through lamp replacement and removal. When combined with improved lighting management, these could reduce annual electricity consumption by 34% to 248,321 kWh. An investigation of available renewable resources (Photovoltaic (PV), wind and hydroelectric) found that PV generation was the most suitable for this urban setting. PV generation using 53 by 4 kW panels, at a capital cost of $1.3 million, which would generate 250,425 kWh per year. This would meet the annual electricity demand, but there would be a summer surplus and winter deficit. The absence of net metering provision makes this option uneconomic, although the creation of an Otaki mini-grid may be a viable alternative.</p>

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.

Energy Efficient Cam-Follower Systems

1983 ◽  
Vol 105 (4) ◽  
pp. 681-685 ◽  
Author(s):  
F. Freudenstein ◽  
M. Mayourian ◽  
E. R. Maki
Keyword(s):  
Energy Efficiency ◽  
Energy Loss ◽  
Energy Efficient ◽  
Energy Savings ◽  
Functional Dependence ◽  
Minimum Energy ◽  
Optimization Strategy ◽  
Cam Follower ◽  
Return Spring ◽  
Rating Factor

The energy loss in cam-follower systems due to friction between moving parts can be a significant contributor to the power loss in machinery. Considering the total number of cam-operated machines in manufacturing and other operations, the energy savings obtainable by improving the efficiency of the average cam-follower system by even a small percentage would be significant. In this investigation a new rating factor—an energy-loss coefficient proportional to the energy loss at the cam-follower interface—has been defined and evaluated. The rating factor relates to energy efficiency in a manner analogous to the way in which the well-known rating factors for velocity, acceleration, and shock relate to the kinematic characteristics of the cam-follower system. Two cam-follower configurations have been considered: 1) a follower motion governed by both cam and return spring, and 2) a follower positively driven by the cam. In both cases it was found that cam curves with identical rise and rise times can differ substantially in energy efficiency thereby demonstrating the significance of an energy-optimization strategy in the design of cam-follower systems. The nature of the functional dependence of the energy loss on system parameters has been identified and a minimum energy-loss limit established.

scholarly journals Energy -Efficient Reconstruction of Public Lighting in Pravets Municipality from Bulgaria

2019 ◽  
Vol 112 ◽  
pp. 04008
Author(s):  
Veselka Kamburova ◽  
Violeta Rasheva ◽  
Michail Velikanov
Keyword(s):  
Energy Savings ◽  
Electric Energy ◽  
Electricity Consumption ◽  
Energy Audit ◽  
Street Lighting ◽  
Europe 2020 ◽  
Europe 2020 Strategy ◽  
Energy Conservation Measures ◽  
The Eu

Improving energy efficiency and reducing greenhouse gases is a central issue of the Europe 2020 strategy. Today enormous electric energy is consumed by the street lighting. Much of it could be saved through suitable energy-conservation measures (ECMs). The energy audit of the street lighting system in the Pravets municipality was carried out in compliance with the legislation in force in the EU and Bulgaria. Data about the present state of street lighting and electricity consumption for a period of 3 years were gathered and analysed. The baseline electricity consumption was defined. Classification of streets was done and the light class of the different categories streets was determined. The potential for energy savings was identified and a package of ECMs was developed. The annual electricity savings are 680 MWh (or 57,441 €/y) and the annual CO2 emissions savings are 557,640 t. The investment for implementation of the envisaged ECMs is 414,840 €. The expected electricity savings compared to the baseline are 75%.

scholarly journals Determining the efficiency of residential electricity consumption

2020 ◽  
Author(s):  
Mark A. Andor ◽  
David H. Bernstein ◽  
Stephan Sommer
Keyword(s):  
Energy Efficiency ◽  
Stochastic Frontier Analysis ◽  
Energy Savings ◽  
Stochastic Frontier ◽  
Electricity Consumption ◽  
Frontier Analysis ◽  
Residential Electricity ◽  
Main Determinants ◽  
Residential Electricity Consumption ◽  
Reduction Of Energy Consumption

AbstractIncreasing energy efficiency is a key global policy goal for climate protection. An important step toward an optimal reduction of energy consumption is the identification of energy saving potentials in different sectors and the best strategies for increasing efficiency. This paper analyzes these potentials in the household sector by estimating the degree of inefficiency in the use of electricity and its determinants. Using stochastic frontier analysis and disaggregated household data, we estimate an input requirement function and inefficiency on a sample of 2000 German households. Our results suggest that the mean inefficiency amounts to around 20%, indicating a notable potential for energy savings. Moreover, we find that household size and income are among the main determinants of individual inefficiency. This information can be used to increase the cost-efficiency of programs aimed to enhance energy efficiency.

Application of Green Lighting Technology in Highway Service – A Case Study of Mt. Lushan West Sea Tourism Highway Service

2014 ◽  
Vol 548-549 ◽  
pp. 1815-1819 ◽  
Author(s):  
Xiao Chun Qin ◽  
She Gang Shao ◽  
Yi Shen
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Energy Savings ◽  
Light Guide ◽  
Operating Costs ◽  
Natural Light ◽  
Lighting Technology ◽  
Lighting Systems ◽  
Service Application

Green lighting technology has the advantages of energy efficiency, friendly environment, safety and comfort. Based on the introduction of green lighting technology, taken the Mt. Lushan West Sea tourist highway service as the case study, we analyzed light guide illumination, the optimum use of natural light and energy efficient lighting respectively from the aspects of technical characteristics and the specific highway service application. We finally made the economic analysis in the energy savings of green lights in the highway service, and the result showed that through the use of green lighting systems Mt. Lushan West Sea tourist highway service could save electricity and reduce operating costs 134,700 Yuan per year.

Energy efficiency in the European water industry: learning from best practices

2012 ◽  
Vol 3 (1) ◽  
pp. 11-17 ◽  
Author(s):  
J. Frijns ◽  
R. Middleton ◽  
C. Uijterlinde ◽  
G. Wheale
Keyword(s):  
Energy Efficiency ◽  
Best Practices ◽  
Energy Efficient ◽  
Energy Savings ◽  
Water Cycle ◽  
Biogas Production ◽  
Energy Generation ◽  
Water Industry ◽  
Efficient Design ◽  
European Water

Energy costs and climate change challenges the water industry to improve their energy efficiency. The number of examples of energy measures in water production and treatment is growing rapidly. In this paper, best practices of energy efficiency from the European water industry are presented with the objective of learning from each other. The best practices are collected within the framework of the Global Water Research Coalition's attempt to devise a global compendium ‘Best practices in the energy efficient design and operation of water industry assets’. The case studies in the compendium show significant energy savings in all parts of the water cycle. Examples with potential include the improved operational set up of pumping design, on line aeration control, and energy-efficient bubble aerators and sludge belt thickeners. Next to optimising energy efficiency across the water cycle, there are also opportunities for energy generation. Promising practices include biogas production from sludge (co)digestion and hydraulic energy generation from micro-turbines.

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