scholarly journals Energy efficiency by use of automated energy-saving windows with heat-reflective screens and solar battery for power supply systems of European and Russian buildings

2015 ◽  
Vol 93 ◽  
pp. 012015 ◽  
Author(s):  
V M Zakharov ◽  
N N Smirnov ◽  
V V Tyutikov ◽  
B Flament
Keyword(s):  
Energy Efficiency ◽  
Energy Saving ◽  
Power Supply ◽  
Solar Battery ◽  
Supply Systems

Study of power transformer loading in rural power supply systems

2021 ◽  
Vol 13 (4) ◽  
pp. 282-289
Author(s):  
I. V. Naumov ◽  
D. N. Karamov ◽  
A. N. Tretyakov ◽  
M. A. Yakupova ◽  
E. S. Fedorinovа
Keyword(s):  
Energy Efficiency ◽  
Power Supply ◽  
Rural Areas ◽  
Power Transformer ◽  
Electric Energy ◽  
Power Transformers ◽  
Electric Networks ◽  
Load Factors ◽  
Optimal Load ◽  
Supply Systems

The purpose of this study is to study the effect of loading power transformers (PT) in their continuous use on their energy efficiency on a real-life example of existing rural electric networks. It is noted that the vast majority of PT in rural areas have a very low load factor, which leads to an increase in specific losses of electric energy when this is transmitted to various consumers. It is planned to optimize the existing synchronized power supply systems in rural areas by creating new power supply projects in such a way as to integrate existing power sources and ensure the most efficient loading of power transformers for the subsequent transfer of these systems to isolated ones that receive power from distributed generation facilities. As an example, we use data from an electric grid company on loading power transformers in one of the districts of the Irkutsk region. Issues related to the determination of electric energy losses in rural PT at different numerical values of their load factors are considered. A computing device was developed using modern programming tools in the MATLAB system, which has been used to calculate and plot the dependence of power losses in transformers of various capacities on the actual and recommended load factors, as well as the dependence of specific losses during the transit of 1 kVA of power through a power transformer at the actual, recommended and optimal load factors. The analysis of specific losses of electric energy at the actual, recommended and optimal load factors of PT is made. Based on the analysis, the intervals of optimal load factors for different rated power of PT of rural distribution electric networks are proposed. It is noted that to increase the energy efficiency of PT, it is necessary to reduce idling losses by increasing the load of these transformers, which can be achieved by reducing the number of transformers while changing the configuration of 0.38 kV distribution networks.

scholarly journals Energy saving in power supply systems

2018 ◽  
Vol 0 (13) ◽  
pp. 80
Author(s):  
Андрій Вікторович Гнатов ◽  
Щасяна Валіковна Аргун ◽  
Олександр Андрійович Дзюбенко ◽  
Валентина Всеволодівна Тарасова ◽  
Аліна Олександрівна Левенець ◽  
...  
Keyword(s):  
Energy Saving ◽  
Power Supply ◽  
Supply Systems

scholarly journals Development of Interrelated Voltage Regulation System for Coal Mines Energy Efficiency Improving

2018 ◽  
Vol 41 ◽  
pp. 03013 ◽  
Author(s):  
Fedor Nepsha ◽  
Roman Belyaevsky
Keyword(s):  
Energy Efficiency ◽  
Power Consumption ◽  
Power Supply ◽  
Coal Mines ◽  
Voltage Regulation ◽  
Active Power ◽  
Regulation System ◽  
State Matrix ◽  
Voltage Level ◽  
Supply Systems

In this paper, the authors propose an algorithm for interrelated voltage regulation in the power supply system of coal mine which allows to provide a normative voltage level and to minimize the level of active power consumption. A feature of the proposed algorithm is a separate consideration of discrete and nondiscrete variables. Nondiscrete variables are represented as a state matrix. The optimization of nondiscrete variables is performed for each state. The algorithm chooses a state with the minimal active power consumption. The obtained values of discrete and nondiscrete variables are transferred in the form of control signals to voltage regulation devices. In this case, the periodicity of the switching is determined by the resource of the on-load tap-changing device. The use of this algorithm will theoretically allow increasing the energy efficiency of power supply systems of coal mines.

A Comparative Study on the Effects of Power Supply Patterns in Microgrids for DC Powered Electrical Appliances

2014 ◽  
Vol 986-987 ◽  
pp. 167-171
Author(s):  
Siddharth Narayanan ◽  
Rajagopalan Badrinarayanan ◽  
Zhen Lu
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Comparative Study ◽  
Power Supply ◽  
Model Simplification ◽  
Dc Microgrids ◽  
Load Model ◽  
Bridge Rectifier ◽  
The Cost ◽  
Supply Systems

To increase the energy efficiency and reduce the cost, the DC-Microgrids will have a very promising future in the power supply systems. In this paper, two power supply patterns for modern appliances, the central rectifier pattern and the distributed rectifier pattern, are investigated and compared. A concept of equivalent efficiency of diode bridge rectifier for DC-powered appliances is introduced and then it is applied in the model simplification. A Curved-Load model is constructed which is based on the specific efficiency characteristics of diode bridge rectifier in a particular current range and the statistics for appliance’s energy consumption as a percentage of the total. Using the Curved-Load model, the comparison of two microgrid system models was conducted with the help of simulations using Ansoft Simplorer 9.0 aiming to examine the conversion efficiency of rectifier patterns.

Energy-Saving Optimization of Heating Supply Systems of Sino-Singapore (Tianjin) Eco-City Energy Planning

2013 ◽  
Vol 689 ◽  
pp. 453-458
Author(s):  
Lan Tang ◽  
Yu Lei Xing
Keyword(s):  
Energy Efficiency ◽  
Sustainable Development ◽  
Energy Saving ◽  
Supply System ◽  
Energy Planning ◽  
Energy Strategy ◽  
Cooling Mode ◽  
The Sustainable Development ◽  
Heating And Cooling ◽  
Supply Systems

The sustainable energy strategy is an important guarantee for the sustainable development of the Sino-Singapore (Tianjin) Eco-City (SSEC). Whether the energy strategy could be successful or not, it depend on that how much the energy will be consumed by building heating and cooling in SSEC. After has analyzed the technical characteristics of heating supply system, and also studied the optimization technologies of energy-saving, which are relevant to the temperature of heating supply, thermal station configuration, cooling mode, solar collectors and etc, this paper proposes a sound path to improve the energy efficiency and cost-effectiveness of the Eco-City in operation, so as to promote sustainable development.

scholarly journals Multicell Power Supplies for Improved Energy Efficiency in the Information and Communications Technology Infrastructures

2021 ◽  
Author(s):  
Michael Chrysostomou ◽  
Nicholas Christofides ◽  
Stelios Ioannou ◽  
Alexis Polycarpou
Keyword(s):  
Energy Efficiency ◽  
Power Supply ◽  
Rapid Growth ◽  
Energy Demand ◽  
Information And Communications Technology ◽  
Power Supplies ◽  
Low Latency ◽  
Communications Technology ◽  
5G Networks ◽  
Supply Systems

The rapid growth of the Information and Communications Technology (ICT) sector requires additional infrastructure, such as more micro-datacenters and telecom stations, to support the higher internet speeds and low latency requirements of 5G networks. The increased power requirements of the new ICT technologies necessitate the proposal of new power supplies in an attempt to retain the increase in energy demand and running costs. The work analyses how multicell structured power supply units can increase the energy efficiency of the power supply systems and thus minimize running costs of ICT networks. The effect of multicell structures in energy efficiency improvements is verified experimentally and through simulations in PSIM’s thermal module. A new multicell Power Supply Unit (PSU) is proposed for ICT power supplies and it is shown that using multicell structures, higher efficiency at varying load levels can be achieved.

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