scholarly journals Effects of Low Charge and Environmental Conditions on Diesel Generators Operation

Eng ◽  
2020 ◽  
Vol 1 (2) ◽  
pp. 137-152
Author(s):  
Mohamad Issa ◽  
Hussein Ibrahim ◽  
Hatem Hosni ◽  
Adrian Ilinca ◽  
Miloud Rezkallah
Keyword(s):  
Environmental Conditions ◽  
Renewable Energy Sources ◽  
Electricity Production ◽  
Diesel Generator ◽  
Cold Temperatures ◽  
Technical Problems ◽  
Operation Conditions ◽  
Diesel Generators ◽  
Low Charge ◽  
The Impact

In the context of electricity production in remote areas, the use of diesel generators, either alone or in hybridization with renewable energy sources, faces many technical problems. Indeed, the electrical instability that often characterizes the isolated networks, due to the fluctuating character of renewable resources and the high variability in the load profile, leads to the operation of the diesel generator in transient dynamic conditions, at low loads or outside prescribed environmental conditions. Furthermore, the extended operation of the diesel generator at low charge results in the condensation of combustion residues on the engine cylinder walls, which, after a certain time, increases friction, reduces the efficiency and increases fuel consumption. One way to solve this problem and to eliminate these deposits is to operate the engine at a higher speed until the operating temperature is reached. This paper explores the impact of the wind turbine penetration rate for hybrid wind–diesel systems and the effects of cold temperatures, high altitude, and other environmental operation conditions on diesel generators’ performances. We outlines the impacts of low load and environmental conditions such as ambient temperature, humidity, moisture, abrasive dust, cold and corrosive environments on the operation of modern diesel generators. The problem has been approached by examining the existing literature, researching damage cases, analyzing existing data, and assessing industrial experiences.

scholarly journals Energy Production from Biogas: Competitiveness and Support Instruments in Latvia

2016 ◽  
Vol 53 (5) ◽  
pp. 43-53
Author(s):  
G. Klāvs ◽  
A. Kundziņa ◽  
I. Kudrenickis
Keyword(s):  
New Technologies ◽  
Local Economic Development ◽  
Renewable Energy Sources ◽  
Distribution Network ◽  
Scale Up ◽  
Electricity Production ◽  
Small Scale ◽  
Gas Distribution ◽  
Ex Post ◽  
The Impact

Abstract Use of renewable energy sources (RES) might be one of the key factors for the triple win-win: improving energy supply security, promoting local economic development, and reducing greenhouse gas emissions. The authors ex-post evaluate the impact of two main support instruments applied in 2010-2014 – the investment support (IS) and the feed-in tariff (FIT) – on the economic viability of small scale (up to 2MWel) biogas unit. The results indicate that the electricity production cost in biogas utility roughly corresponds to the historical FIT regarding electricity production using RES. However, if in addition to the FIT the IS is provided, the analysis shows that the practice of combining both the above-mentioned instruments is not optimal because too high total support (overcompensation) is provided for a biogas utility developer. In a long-term perspective, the latter gives wrong signals for investments in new technologies and also creates unequal competition in the RES electricity market. To provide optimal biogas utilisation, it is necessary to consider several options. Both on-site production of electricity and upgrading to biomethane for use in a low pressure gas distribution network are simulated by the cost estimation model. The authors’ estimates show that upgrading for use in a gas distribution network should be particularly considered taking into account the already existing infrastructure and technologies. This option requires lower support compared to support for electricity production in small-scale biogas utilities.

scholarly journals Technological Innovation in the Aspect of Safety in the Process of Heat Supply

2019 ◽  
Vol 1 (1) ◽  
pp. 412-418
Author(s):  
Aleksandra Wrzalik ◽  
Matevž Obrecht
Keyword(s):  
Energy Efficiency ◽  
Heat Supply ◽  
Renewable Energy Sources ◽  
District Heating ◽  
High Energy ◽  
The European Union ◽  
Heating Systems ◽  
Operation Conditions ◽  
Network Operation ◽  
The Impact

AbstractIn recent years heating in Poland has been transformed as a result of the priorities of the country's energy policy implemented within the European Union. The increase in energy security, the development of renewable energy sources and the fulfilment of legal and environmental requirements are very important. Exploitation of district heating systems should ensure reliable and safe heat supplies for industrial and municipal customers with high energy efficiency and reduction of environmental impact. The article discusses the conditions and directions of centralized heating systems development as well as technical and economic issues, which are important for the security of heat supply. The Author describes selected technological innovations used in the technical infrastructure for heat transfer and modern IT systems which are improving the management of heating systems. The article includes the results of simulation research with use of IT tools showing the impact of selected innovations on the improvement of network operation conditions. Directions of modernization of heating systems in the aspect of increasing energy efficiency and security of heat supply have also been indicted here.

scholarly journals Analysis of Competitiveness and Support Instruments for Heat and Electricity Production from Wood Biomass in Latvia

2012 ◽  
Vol 49 (2) ◽  
pp. 3-13
Author(s):  
G. Klavs ◽  
I. Kudrenickis ◽  
A. Kundzina
Keyword(s):  
Electricity Market ◽  
Cost Estimation ◽  
Renewable Energy Sources ◽  
Economic Feasibility ◽  
Electricity Production ◽  
Minor Role ◽  
Wood Biomass ◽  
Estimation Model ◽  
The Impact ◽  
Feed In Tariff

Analysis of Competitiveness and Support Instruments for Heat and Electricity Production from Wood Biomass in Latvia Utilisation of renewable energy sources is one of the key factors in a search for efficient ways of reducing the emissions of greenhouse gases and improving the energy supply security. So far, the district heating supply in Latvia has been based on natural gas, with the wood fuel playing a minor role; the same is true for decentralised combined heat-power (CHP) production. The paper describes a method for evaluation of the economic feasibility of heat and electricity production from wood biomass under the competition between different fuel types and taking into account the electricity market. For the simulation, a cost estimation model is applied. The results demonstrate that wood biomass can successfully be utilised for competitive heat production by boiler houses, while for electricity production by CHP utilities it cannot compete on the market (even despite the low prices on wood biomass fuel) unless particular financial support instruments are applied. The authors evaluate the necessary support level and the impact of two main support instruments - the investment subsidies and the feed-in tariff - on the economic viability of wood-fuelled CHP plants, and show that the feed-in tariff could be considered as an instrument strongly affecting the competitiveness of such type CHP. Regarding the feed-in tariff determination, a compromise should be found between the economy-dictated requirement to develop CHP projects concerning capacities above 5 MWel - on the one hand, and the relatively small heat loads in many Latvian towns - on the other.

scholarly journals Challenges in the Development of Hydropower in Selected European Countries

Water ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3542
Author(s):  
Paweł Tomczyk ◽  
Mirosław Wiatkowski
Keyword(s):  
Renewable Energy ◽  
Energy Policy ◽  
Renewable Energy Sources ◽  
Electricity Production ◽  
The European Union ◽  
Change Factors ◽  
Hydropower Plants ◽  
Rational Management ◽  
Domestic Electricity ◽  
The Impact

Hydropower in Europe is playing an increasingly important role as a renewable source of energy. Its share of the final energy consumption varies from country to country, posing different challenges in each. The European Union member states are obliged, according to energy policy, to increase the share of renewable energy. This article presents the challenges related to the development of hydropower in four countries with different shares of domestic electricity production from hydropower plants: Albania (100% share in 2019), Slovenia (25.7%), Poland (1.1%), and Estonia (0.3%). Particular attention is paid to the issues of rational management of water resources in connection to Europe’s energy policy. As a result of the case study analysis, the challenges in the development of hydropower are identified, as well as ways to solve them. In addition, a comprehensive analysis of the impact of social, economic, environmental and climate change factors on the development of hydropower was conducted. At present, whether the assumed goals of the European Union’s energy policy will be achieved is impossible to determine for the whole of Europe. Achieving these goals will be possible only after individual countries prepare comprehensive reports on the topics of renewable energy sources, including hydropower.

scholarly journals Specific Features of Renewable Energy Development in the World and Russia

2021 ◽  
Vol 13 (5) ◽  
pp. 93-107
Author(s):  
Victoria I. Bushukina ◽  
Keyword(s):  
Renewable Energy ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Multivariate Regression Analysis ◽  
Electricity Production ◽  
Thermal Generation ◽  
Systematic Analysis ◽  
Energy Projects ◽  
The World ◽  
The Impact

The purpose of the article is to study the theoretical and practical aspects of investment activities in the field of renewable energy in the world and in Russia. To achieve this goal, during the development of theoretical material, a systematic analysis of existing approaches to the assessment of financing mechanisms for renewable energy projects was carried out. Statistical and econometric research tools include correlation analysis and multivariate regression analysis. The article examines the development of renewable energy, its benefits, and investments in the industry. The financial risks and barriers associated with financing renewable energy projects are considered. The development of the industry over the past 10 years is analyzed, taking into account the impact of the COVID-19 pandemic on the electricity industry in general and on renewable energy in a number of countries. It is established that the world is shifting to the use of renewable energy sources, and in Russia they are not being given due attention. It is revealed that the existing thermal generation units in Russia are of great age and are to be decommissioned in the near future. The current state of renewable energy in Russia, measures to support it and the rate of its development are investigated. The technical potential of wind and solar power plants in the Russian Federation is considered within the aim of diversifying electricity production. The factors that negatively affect the development of the renewable energy industry are identified.

scholarly journals Development of hybrid photo-wind power systems with a diesel generator to overcome energy shortages

2021 ◽  
Vol 270 ◽  
pp. 01029
Author(s):  
Faez Al-Rufaee ◽  
Laythи Abd Ali ◽  
Vladimir Kuvshinov
Keyword(s):  
Power Systems ◽  
Wind Turbine ◽  
Composite Structures ◽  
Autonomous System ◽  
Renewable Energy Sources ◽  
Effective Solution ◽  
Diesel Generator ◽  
Efficient System ◽  
Diesel Generators ◽  
Wind Power Systems

The paper discusses the possibilities of using hybrid composite structures to overcome the energy shortage in Iraq, as well as the development of an efficient system of solar, wind turbine diesel generators. In this article, a Diesel Generator is combined with a wind turbine and batteries on the basis that the sun’s energy is not constant over time. The simulation was carried out using the HOMER program, which allows a detailed analysis of the volume and power of energy generated by the proposed system. The HOMER program is used for technical, economic, and environmental assessments. According to the results of the study, it was established that the most effective solution for saving electricity and overcoming energy shortages is a system consisting of renewable sources, as well as a diesel generator with batteries. The results also show that renewable energy sources used in the hybrid system provide about 69.2% of the electricity generated. This certainly improves the reliability of the electricity generated and reduces the fuel and maintenance costs of diesel generators, as well as saving the environment. The analysis of optimal systems is explained in detail to find the most achievable autonomous system.

scholarly journals Electric Vehicles and Biofuels Synergies in the Brazilian Energy System

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4423 ◽  
Author(s):  
Géremi Gilson Dranka ◽  
Paula Ferreira
Keyword(s):  
Power Systems ◽  
Co2 Emissions ◽  
Electric Vehicles ◽  
Large Scale ◽  
Renewable Energy Sources ◽  
Energy System ◽  
Electricity Production ◽  
Transport Sector ◽  
Transportation Sector ◽  
The Impact

Shaping a secure and sustainable energy future may require a set of transformations in the global energy sector. Although several studies have recognized the importance of Electric Vehicles (EVs) for power systems, no large-scale studies have been performed to assess the impact of this technology in energy systems combining a diverse set of renewable energies for electricity production and biofuels in the transportation sector such as the case of Brazil. This research makes several noteworthy contributions to the current literature, including not only the evaluation of the main impacts of EVs’ penetration in a renewable electricity system but also a Life-Cycle Assessment (LCA) that estimates the overall level of CO2 emissions resulted from the EVs integration. Findings of this study indicated a clear positive effect of increasing the share of EVs on reducing the overall level of CO2 emissions. This is, however, highly dependent on the share of Renewable Energy Sources (RES) in the power system and the use of biofuels in the transport sector but also on the credits resulting from the battery recycling materials credit and battery reuse credit. Our conclusions underline the importance of such studies in providing support for the governmental discussions regarding potential synergies in the use of bioresources between transport and electricity sectors.

scholarly journals Renewable Energies as a Substitute for Fossil Fuel Resources in Poland

2021 ◽  
Author(s):  
Aleksander Wasiuta
Keyword(s):  
Renewable Energy ◽  
Fossil Fuel ◽  
Renewable Energy Sources ◽  
Energy System ◽  
Energy Sector ◽  
Electricity Production ◽  
Energy Sources ◽  
Low Carbon ◽  
Transmission Grid ◽  
The Impact

Abstract BackgroundThe characteristic feature of modern energy sector in the EU is the development of environmentally friendly technologies based on renewable energy sources (RES). The use of alternative and RES contributes to resolving not only energy efficiency issues, but many of the environmental, economic and social problems. RES are also one of the priorities of the world's low carbon policy and reducing CO2 emissions into the atmosphere. Growing electrical energy consumption and increasing integration of RES in power systems have led to new challenges, thus it is required to investigate and properly analyze the impact of integrated RES on the power system as a substitute for fossil fuel resources.ResultsThe aim of the article is to show the possibilities of developing RES in Poland in the context of environmental protection, energy self-sufficiency and international obligations. The depletion of primary energy sources and the increase in emissions of greenhouse gases to the atmosphere forces undertaking certain activities, aimed at seeking substitutes for fossil fuels. According to the author’s analysis, RES are the best and safest substitutes for traditional energy resources such as fossil fuel.ConclusionsThe author examines electricity production mix in EU counties and compares it to Polish energy sector. Taking into consideration the transmission network density in Poland, while energy sector changes its structure and expands, the mix of technologies deployed to produce electricity determines the associated burden on transmission networks. Polish energy sector development in the context of modernization of transmission grid provides an opportunity for investors to prepare the energy system for increasing the share of renewable energy sources. In the process of implementing the appropriate solution, the experiences of other countries that have significantly increased the share of renewable energy in the past could be used. This article presents the main areas of action that may facilitate the further integration of different energy sources in the specific context of Poland's changing energy system. Not all integration options will be important for Poland at the same time.

A framework for the techno-economic and reliability analysis of grid connected microgrids

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ernestina Mawushie Amewornu ◽  
Nnamdi I. Nwulu
Keyword(s):  
Renewable Energy ◽  
System Analysis ◽  
Distribution Network ◽  
Electricity Production ◽  
Voltage Profile ◽  
Diesel Generator ◽  
Content Type ◽  
Reliability Indices ◽  
Power Loss Reduction ◽  
The Impact

Purpose This research studies the impact of introducing distributed generators (DGs) into a distribution network. The aim of this paper is to optimally site DGs based on economic, environmental and reliability indices are presented. Design/methodology/approach The considered network was modelled by using the network’s line parameters and capacity of the load bus with the help of Power System Analysis Toolbox. The location of the DG is based on voltage stability index and power loss reduction index. The DG energy sources considered are the diesel generator, solar photo-voltaic (PV) and wind generator, and the objectives were to minimize cumulative cost while maximizing reliability of the network. The Advanced Interactive Multidimensional Modelling System was used for the mathematical modelling. Findings The obtained results in the cases of introducing renewable energy into a network improves network performance. The benefits of renewable energy on the distribution network measured in terms of electricity production cost, gas emission cost, fuel cost and value of energy not supplied were positive. The research also showed that the total benefit of renewable energy reduces as the price of the renewable generators increases. Originality/value This paper introduces a new approach to determining the optimal location of DG for reducing line losses and improved voltage profile. A new cost modelling function based on external grid power transfer cost, technical losses and cost because of the various energies source is also introduced.

scholarly journals Impact of the Reduction of Diesel Fuel Subsidy in the Design of an Off-Grid Hybrid Power System: A Case Study of the Bellavista Community in Ecuador

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1730
Author(s):  
Ruben Hidalgo-Leon ◽  
Fernando Amoroso ◽  
Jaqueline Litardo ◽  
Javier Urquizo ◽  
Miguel Torres ◽  
...  
Keyword(s):  
Power System ◽  
Diesel Fuel ◽  
Electricity Production ◽  
Diesel Generator ◽  
Fuel Price ◽  
Hybrid Power System ◽  
Fuel Prices ◽  
Hybrid Power ◽  
The Impact

This paper presents a technical, economic, and environmental analysis and optimization of the impact of the reduction of diesel fuel subsidy in the design of an off-grid hybrid power system (OHPS). The OHPS includes a diesel generator, battery energy storage system (BESS), and a solar power system (SPS). This impact will focus on the electricity production levels of each of the OHPS components according to the increase of the fuel price and the SPS size. The Bellavista community in Ecuador was selected as the case study for this work. In this South American country, the government has begun a gradual increase in the diesel fuel price until it reaches international prices. Fifteen scenarios of OHPSs were simulated, in Homer Pro software, considering three SPS sizes and varying the diesel fuel price in five values. The annual load profile for the simulations was built based on the information of a previous study in this community. The results showed that for lower fuel prices (USD$0.26/L and USD$0.35/L), the OHPSs worked mostly with their diesel generators with reduced use of their BESSs. However, there was a higher penetration of the power delivered from the SPSs and BESSs, with higher fuel prices (USD$0.44/L, USD$0.53/L, and USD$0.62/L). These OHPSs considerably reduced their CO2 emissions compared with the standalone diesel generator scenario.

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