Role Of Renewable Energy Sources Research Articles

Droop Control of Solar PV, Grid and Critical Load using Suppressing DC Current Injection Technique without Battery Storage

This paper presents design of a sustainable solar Photo voltaic system for an Indian cities based residential/community house, integrated with grid, supporting it as supplementary sources, to meet energy demand of domestic loads. The role of renewable energy sources in Distributed Generation (DG) is increasingly being recognized as a supplement and an alternative to large conventional central power supply. Though centralized economic system that solely depends on cities is hampered due to energy deficiency, the use of solar energy in cities is never been tried widely due to technical inconvenience and high installation cost. To mitigate these problems, this paper proposes an optimized design of grid-tied PV system without storage which is suitable for Indian origin as it requires less installallation cost and supplies residential loads when the grid power is unavailable. The energy requirement is mainly fulfilled from PV energy module for critical load of a city located residential house and supplemented by grid/DG for base and peak load. The system has been developed for maximum daily household demand of 50kWp and can be scaled to any higher value as per requirement of individual/community building ranging from 50kWp to 60kWp as per the requirement. A simplified control system model has been developed to optimize and control flow of power from these sources. The simulation work, using MATLAB Simulink software for proposed energy management, has resulted in an optimal yield leading efficient power flow control of proposed system.

Editorial - International Journal of Sustainable Energy Planning and Management Vol 11

This editorial introduces the main findings from the 30th Volume of the International Journal of Sustainable Energy Planning and Management. This volume probes into analyses of the technical interactions between multi-energy carrier energy hubs and the role and feasibility of cogeneration of heat and power in a Portuguese context. It moves on to analyse the framework for implementing photo voltaic technology and decision processes for implementing PV technology. Lastly, it presents work on the role of renewable energy sources in meeting carbon dioxide emission reduction goals in Iran.

Solar based Power Converter for Heart Pumping Application

Solar PV system plays a vital role in renewable energy sources, which is applied for all fields of science and engineering. In this paper, the usage of solar energy for heart pumping application is discussed. Transcutaneous energy transfer (TET) is used for furnishing supply to implantable device with split capacitor push pull parallel resonant converter in boost mode operation. In existing system heart pumping is done via percutaneous cable. It has the drawbacks of infections and it's associated withrisk. Transcutaneous energy transfer method eliminates these problems and it reaches the end to end efficiency level. The proposed system is configured using MATLAB/Simulink tools.

Transformacja energetyczna w polskiej gminie. Skutki polityki lokalnej opartej o odnawialne źródła energii na przykładzie Kisielic

The increasing role of renewable energy sources implies significant socio-economic changes at the local level. In Poland, a great importance in that area is attached to wind turbines and biofuel-based combined heat and power stations. Localization of these investments often leads to social conflicts. The aim of this study is to assess the consequences of local policy in Kisielice, which in the years 1998 to 2015 gave priority to RES development. Considering this problem from the perspective of the energy justice framework and the law on wind energy investments, a case study has been investigated. The case study consists of: (1) literature review, including nine interviews with the local authorities (2) statistical and spatial analysis (3) fieldwork in five villages located in the direct neighbourhood of wind energy turbines. The results show that long-term local energy policy in Kisielice, implemented with an intensity comparable to the German Energiewende, has met the most of social acceptance conditions. Support for RES in the villages susceptible to anthropogenic influence displays similar patterns to trends at the national level. However, the inhabitants have a sense of injustice resulting from the fact that only a small group obtains benefits from the use of wind turbines. According to the author’s opinion, a compromise between restrictive provisions of the law on wind energy investments and local community’s interests can only be based on creating the atmosphere of trust and partnership, as well as implementing mechanisms of direct compensations for negative external effects created by renewable installations.

The role of renewable energy sources in USA energy production – part I

The role of renewable energy sources in USA energy production – part I

The role of renewable energy sources in the USA energy production – part II

The role of renewable energy sources in the USA energy production – part II

A novel smart grid theory for optimal sizing of hybrid renewable energy systems

Smart grid enables interaction between the generation and load to optimally deliver energy based on the operating conditions. Although smart grid solves many of the contemporary problems, it gives rise to new control and optimization problems especially with the growing role of renewable energy sources. Load shifting technique has been applied in this paper by dividing the load into two categories, high priority load (HPL) and low priority load (LPL). HPL is that must be supplied whatever the generation conditions, but LPL can be supplied when the generation from renewable sources is available. This paper introduces a new proposed design and optimization program for techno-economic sizing of standalone hybrid PV/wind/diesel/battery energy systems under smart grid theory for the lowest cost of generated energy at highest reliability. An accurate methodology for pairing between five Saudi Arabia sites and ten wind turbines (WTs) from different manufacturers to maximize energy production and minimize the price of kWh generated has been introduced. The new proposed program is implemented in flexible fashion which is not available in many market available programs. Many valuable results can be extracted from the proposed program that could help researchers and decision makers.

Long-run energy scenarios for Cambodia and Laos: Building an integrated techno-economic and environmental modelling framework for scenario analyses

This article analyses energy trends in Cambodia and Laos and constructs future scenarios. The target is (i) to compare different scenario methods, (ii) to construct scenarios with these methods, (iii) to analyse the future energy demand and the related CO2 emissions and (iv) to analyse the potential role of renewable energy sources and their impact on CO2 emissions.Decomposition scenarios have been constructed based on the trends of the drivers of the energy consumption and CO2 emissions. More detailed scenarios have been constructed using combined LEAP/LINDA models to take into account the structural socio-economic and technological changes in the energy system. The paper provides a novel combination of bottom-up modelling and macroeconomic modelling. The constructed scenarios indicate rapid increase in energy consumption and related CO2 emissions mainly due to the fast economic growth and industrialization. Increase in fossil fuel use in electricity production in the future increases the emissions considerably.The potential of different renewable agricultural residues is analysed to evaluate the possibilities to reduce the CO2 emissions and fossil fuel import dependence. The reduction potential is considerably large in both countries.

Recent progress in colloidal quantum dot photovoltaics

The development of photovoltaic devices, solar cells, plays a key role in renewable energy sources. Semiconductor colloidal quantum dots (CQDs), including lead chacolgenide CQDs that have tunable electronic bandgaps from infrared to visible, serve as good candidates to harvest the broad spectrum of sunlight. CQDs can be processed from solution, allowing them to be deposited in a roll-to-roll printing process compatible with low-cost fabrication of large area solar panels. Enhanced multiexciton generation process in CQD, compared with bulk semiconductors, enables the potential of exceeding Shockley-Queisser limit in CQD photovoltaics. For these advantages, CQDs photovoltaics attract great attention in academics, and extensive research works accelerate the development of CQD based solar cells. The record efficiency of CQD solar cells increased from 5.1% in 2011 to 9.9% in 2015. The improvement relies on optimized material processing, device architecture and various efforts to improve carrier collection efficiency. In this review, we have summarized the progress of CQD photovoltaics in year 2012 and after. Here we focused on the theoretical and experimental works that improve the understanding of the device physics in CQD solar cells, which may guide the development of CQD photovoltaics within the research community.

ENERGY EFFICIENCY AS PRECONDITION OF ENERGY SECURITY

Increase of energy efficiency remains as one of the major strategic objectives in Lithuania. Effective use of existing energy saving potential increases energy security and reduces emissions of greenhouse gas and other pollutants. In order to meet the growing energy demand and to reduce the negative impact of the energy sector on environment, increase of the role of renewable energy sources in the country’s primary energy balance, as well as larger deployment of energy-efficient and smart technologies in all areas, including military structures, are required. When analysing energy security and energy efficiency, as the two interrelated aspects of the Lithuanian energy policy, assessment of the global energy trends in the world, the EU and neighbouring countries, expected developments in the modern technologies, as well as global aspirations to neutralize the threat of climate change was performed. The paper provides an overview of energy consumption trends in the European Union and Lithuania, energy policy in the NATO alliance, as well the current status of energy consumption in the Lithuanian National Defence System.

Response of the EU Member States to Climate Change in the Context of EU Policy and Strategy

The aim of this paper is to present selected results achieved by the Member States of the EU in the context of the recent global and European strategies oriented toward enhancement of the role of renewable energy sources and on mitigation of negative climate changes in the Earth. Special attention has been paid to those countries that have approached or already reached, in the year 2012, a share of renewable energy indicators at a percentage level higher than the required 20%.

The Future Role of Renewable Energy Sources for the Generation of Electricity in the European Region

The development and use of renewable energy sources for electricity generation, particularly energy from wind, hydro, solar, biomass and geothermal, is a central aim of the European Commission's Energy Policy. For this reason, it is important to know what could be the role that renewable could play within the EU energy mix during the coming years, based on the role that this type of energy sources is now playing. The use of renewable energy sources for the generation of electricity is expected to be economically competitive in comparison with the use of conventional energy sources with the same purpose, will reduce the negative impact on the environment and the population as a result of the burn of fossil fuels, and will reduce the cost of the energy bill in the medium to long-term.

Beyond solar radiation management – the strategic role of low-cost photovoltaics in solar energy production

This paper examines the role of renewable energy sources (RES), especially the sun, as a potential solution for solar radiation management concerns. It states how photovoltaic (PV), especially low-cost PV and other thin film technology, can be applied and what impact and share they can have on the European market – using the Cyprus market as an example of strategic implementation. The Energy Service of the Ministry of Energy, Commerce, Industry and Tourism currently reports a 7.5% share (as at end of 2012) of RES in overall final energy consumption and suggests ways in which that share can increase. In the near future, PVs will be the most significant electricity source if the cost per kWh produced is further reduced, as was proven recently during the award procedures for PV systems.

Renewable energy in the Lithuanian heating sector

The paper analyses the role of renewable energy sources (RES) in the Lithuanian heating sector and the existing support measures. RES consumption has been continuously growing in Lithuania. During the period of 2000–2009, RES used for heat production in the district heating sector increased more than 4 times. Wood and wood products have been the most widely used RES for heat production (RES-H). The lower prices were one of the main reasons which motivated district heating companies to switch fuel to biomass. At the same time subsidies, soft loans, EU Structural Funds for 2007–2013 and some fiscal measures, which are currently available for RES-H promotion, also have some impact on the increase of RES consumption. However, seeking to achieve a 23% national RES target, additional support measures are essential. A qualitative analysis based on the selected set of criteria and consultation with stakeholders showed that energy policy package for RES promotion in the Lithuanian heating sector could encompass the following measures: tax relieves (differentiated VAT and personal income tax breaks), subsidies, soft loans, standardization, support for research, development and demonstration. These measures are market-oriented and meet cost efficiency and low transaction costs criteria. • Existing support measures are not strongly motivating market players. • In order to meet ambitious 23% targets consistent promotion policy package is required. • The proposed package could consist of 4 instruments: tax related, soft loans, standardization and support for RD&D. • The proposed support measures are market oriented and meets cost efficiency and low transaction costs criteria. • There is no single measure that is fairly suitable to support RES-H.

Solar energy support in the Asia–Pacific region

ABSTRACTThe transition to a sustainable energy system now seems to be inevitable. The role of renewable energy sources in this mutation will be crucial. Amongst these, photovoltaic electricity has recently grown due to strong national policy support. Indeed, it appears as a good solution to substitute conventional fossil fuel, especially in the Asia–Pacific region where reducing greenhouse gas emissions is a real challenge.This paper aims to review public support for photovoltaic energy by focusing on the policies of three emblematic developed countries of the Asia–Pacific region: Australia, Japan and Korea. The efficiency of these different policies is assessed by comparing their estimated total costs. These costs can have different origins: market incentives, demonstration programs and subsidies for research and development (R&D). The public investment was compared with installed capacities in order to evaluate the efficiency of the energy strategy.The point made by this study is that a well‐planned policy limiting unwanted side effects should be preferred. Even if expensive in the short term, innovative technologies are beneficial in the longer term, and thus R&D subsidies should be maintained. Copyright © 2012 John Wiley & Sons, Ltd.

The comprehensive energy-technological utilization of coal

Fossil fuels-natural gas, oil, and coal account for more than 80% of the total energy sources consumed in the world. With due regard for the factual moratorium on the commissioning of new nuclear power plants until the end of the 21st century, as well as moderate role of renewable energy sources, this trend will persist for a rather long time, and marked changes in the dynamics of the structure of consumption will be observed.

Role of renewable energy sources in developing the energy sector of the Republic of Armenia

The main directions and ways of power engineering development in the Republic of Armenia are examined.

Central Asian countries energy system and role of renewable energy sources

The status, problems, and development prospects of the fuel and energy complex of the Central Asian Region (CAR) countries are examined. In particular, data are presented on the CAR energy system resource base, and production and consumption of the fuel and energy resources in the CAR countries are analyzed. Special attention is devoted to the use of renewable energy sources.

Renewable energy sources in the Mexican electricity sector

This paper analyzes the role of renewable energy sources (RES) in the Mexican electricity sector in the context of the proposed renewable energy bill currently under consideration in the Mexican Congress. This paper was divided into three parts. The first part presents a chronology of institutional background related to the RES. This is followed by an analysis of the coordination and management system of the Mexican electricity sector, which can facilitate the promotion and integration of the RES without significant structural changes. Finally, the pros and cons of the renewable energy bill are analyzed in order to demonstrate the need for greater coherence between the bill and the coordination system of the sector. It is concluded that when inconsistency is eliminated, RES would strongly be promoted in Mexico.

RENEWABLE ENERGY SOURCES, DRYING AND SUSTAINABLE DEVELOPMENT

Sustainable development, energy efficiency, use of renewable energy sources and protection of the environment are of greatest current interest at the start of this century. The first energy crisis in 1973 showed that conventional energy sources are limited. The knowledge that energy consumption is greatly the cause of emission of SO2, NOx and CO2 pollutants initiate worldwide investigation of technologies and production of systems using renewable energy sources representing ecologically clean energy sources with no pollutants and harmful influences. The most important role of renewable energy sources is reducing the greenhouse effect, increasing energy safety and the opportunity for opening of new work places in small and medium enterprises. In this paper a short review of alternative energy sources from the viewpoint of sustainable development, energy efficiency and protection of the environment is given including the role of the drying process technology in sustainable development through: reduction of energy “consumption”, drying source bio-fuel, solar drying, drying in order to prevent resource “losses”, drying to protect the environment etc.