scholarly journals RENEWABLE SOURCES IN THE ENERGY SUPPLY SYSTEMS OF UKRAINIAN CITIES

2021 ◽  
Vol 2021 (1) ◽  
pp. 40-49
Author(s):  
I.M. Karp ◽  
◽  
Y.Y. Nikitin ◽  
K.Y. Pyanykh ◽  
◽  
...  
Keyword(s):  
Energy Supply ◽  
Electric Energy ◽  
Renewable Sources ◽  
Energy Needs ◽  
Self Sufficiency ◽  
Global Trend ◽  
Local Sources ◽  
Cottage Development ◽  
Supply Systems ◽  
Energy Supply Systems

70% of the population of Ukraine lives in cities. Electric energy supply of cities with dense buildings is provided mainly from centralized generation sources: TPPs, CHPs, NPPs, RES, and heat energy - from CHPs and gas boilers. Possibilities of energy self-sufficiency of Ukrainian cities based on use of alternative and local energy sources are analyzed. There is a global trend of increasing share of RES in cities energy supply, especially in cities and districts with cottage development. Providing cities with their own energy resources can be achieved through integrated use of renewable and local sources. Production of electricity from renewable sources in terms of return on investment EROI and normalized energy cost over life cycle of LCOE generation source is close to traditional sources indicators. Examples of RES usage to meet energy needs of houses and settlements in Europe are given. High cost of renewable energy stimulates development of this area in Ukraine. Efficiency of renewable and local sources usage in buildings is achieved only with simultaneous introduction of energy saving measures - insulation of buildings, introduction of energy control systems. References 14.

scholarly journals Electric energy supply systems: description of available technologies

1985 ◽  
Author(s):  
J.L. Eisenhauer ◽  
E.A. Rogers ◽  
J.C. King ◽  
G.E. Stegen ◽  
W.J. Dowis
Keyword(s):  
Energy Supply ◽  
Electric Energy ◽  
Supply Systems ◽  
Energy Supply Systems

scholarly journals ELECTRIC ENERGY GENERATION IN AUTONOMOUS ENERGY SUPPLY MODULE HAVING ROTARY EXPANSION ENGINE

2019 ◽  
Vol 3 ◽  
pp. 109
Author(s):  
Andrei Khitrov ◽  
Alexander Khitrov ◽  
Alexander Ilyin ◽  
Yulia Domracheva ◽  
Dmitriy Fedorov
Keyword(s):  
Electric Power ◽  
Energy Supply ◽  
Cold Water ◽  
Electric Energy ◽  
Expansion Engine ◽  
Electric Power Supply ◽  
Technological Growth ◽  
The Russian Federation ◽  
Supply Systems ◽  
Energy Supply Systems

The development of autonomous energy supply systems is among the priority ways of scientific and technological growth in the Russian Federation. The autonomous energy supply module providing the consumer with heat, electric power, hot and cold water can contain the different variants of the electric power subsystem. This paper considers three different variants of building the electric power subsystem for the rotary expansion engine used as a driving machine whereas the permanent magnet synchronous machine is used as a generator. Also the designed structure of 30 kW electric power supply subsystem is regarded.

Developing a Web-based Application for Energy Supply Systems

2019 ◽  
Vol 2 (3) ◽  
pp. 164-169
Author(s):  
Mohammed Faza ◽  
Maulahikmah Galinium ◽  
Matthias Guenther
Keyword(s):  
Energy Supply ◽  
Power Plants ◽  
Acceptance Testing ◽  
Design Activity ◽  
Unit Testing ◽  
Validity Testing ◽  
Energy Supply System ◽  
Time Series Modelling ◽  
Supply Systems ◽  
Energy Supply Systems

An energy supply system consists of a system of power plants and transmission anddistribution systems that supply electrical energy. The present project is limited to the modellingof the generation system. Its objective is the design and implementation of a web-basedapplication for simulating energy supply systems using the Laravel framework. The projectfocuses on six modules representing geothermal energy, solar energy, biopower, hydropower,storage, and fossil-based energy that are allocated to satisfy a given power demand. It isexecuted as a time series modelling for an exemplary year with hourly resolution. Thedevelopment of the software is divided into four steps, which are the definition of the userrequirements, the system design (activity, use case, system architecture, and ERD), the softwaredevelopment, and the software testing (unit testing, functionality testing, validity testing, anduser acceptance testing). The software is successfully implemented. All the features of thesoftware work as intended. Also, the software goes through validity testing using three differentinput data, to make sure the software is accurate. The result of the testing is 100% accuracy withrespect to the underlying model that was implemented in an excel calculation.

MODES FEATURES OF INTEGRATED ENERGY SUPPLY SYSTEMS OPERATION

2018 ◽  
Vol 2 (42) ◽  
pp. 61-67
Author(s):  
D. Derevianko ◽  
◽  
O. Yarmoliuk ◽  
O. Bespalyi ◽  
◽  
...  
Keyword(s):  
Energy Supply ◽  
Supply Systems ◽  
Energy Supply Systems

Energy Hub Modelling for Multi-Scale and Multi-Energy Supply Systems

2019 ◽  
Author(s):  
Lahiru Jayasuriya ◽  
Modassar Chaudry ◽  
Meysam Qadrdan ◽  
Jianzhong Wu ◽  
Nick Jenkins
Keyword(s):  
Energy Supply ◽  
Energy Hub ◽  
Multi Scale ◽  
Supply Systems ◽  
Energy Supply Systems

scholarly journals Profitability of Various Energy Supply Systems in Light of Their Different Energy Prices and Climate Conditions

Buildings ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 100 ◽  
Author(s):  
Elaheh Jalilzadehazhari ◽  
Georgios Pardalis ◽  
Amir Vadiee
Keyword(s):  
Renewable Energy ◽  
Heat Pump ◽  
Energy Supply ◽  
Ground Source Heat Pump ◽  
Energy Prices ◽  
Single Family ◽  
Climate Zones ◽  
Ground Source ◽  
Supply Systems ◽  
Energy Supply Systems

The majority of the single-family houses in Sweden are affected by deteriorations in building envelopes as well as heating, ventilation and air conditioning systems. These dwellings are, therefore, in need of extensive renovation, which provides an excellent opportunity to install renewable energy supply systems to reduce the total energy consumption. The high investment costs of the renewable energy supply systems were previously distinguished as the main barrier in the installation of these systems in Sweden. House-owners should, therefore, compare the profitability of the energy supply systems and select the one, which will allow them to reduce their operational costs. This study analyses the profitability of a ground source heat pump, photovoltaic solar panels and an integrated ground source heat pump with a photovoltaic system, as three energy supply systems for a single-family house in Sweden. The profitability of the supply systems was analysed by calculating the payback period (PBP) and internal rate of return (IRR) for these systems. Three different energy prices, three different interest rates, and two different lifespans were considered when calculating the IRR and PBP. In addition, the profitability of the supply systems was analysed for four Swedish climate zones. The analyses of results show that the ground source heat pump system was the most profitable energy supply system since it provided a short PBP and high IRR in all climate zones when compared with the other energy supply systems. Additionally, results show that increasing the energy price improved the profitability of the supply systems in all climate zones.

A cost optimization model for 100% renewable residential energy supply systems

Energy ◽  
2012 ◽  
Vol 48 (1) ◽  
pp. 118-127 ◽  
Author(s):  
Christian Milan ◽  
Carsten Bojesen ◽  
Mads Pagh Nielsen
Keyword(s):  
Optimization Model ◽  
Energy Supply ◽  
Cost Optimization ◽  
Residential Energy ◽  
Supply Systems ◽  
Energy Supply Systems
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