scholarly journals Study of applying a hybrid standalone wind-photovoltaic generation system

2015 ◽  
Vol 12 (3) ◽  
pp. 333-343
Author(s):  
Dahmani Aissa ◽  
Rachid Abdessemed
Keyword(s):  
Renewable Resources ◽  
Good Alternative ◽  
Economic Feasibility ◽  
Renewable Energy Resources ◽  
Generation System ◽  
Photovoltaic Generation ◽  
Cost Of Energy ◽  
Parameters Analysis ◽  
Hybrid Optimization Model ◽  
The Cost

The purpose of this paper is the study of applying a hybrid system wind/photovoltaic to supply a community in southern Algeria. Diesel generators are always used to provide such remote regions with energy. Using renewable energy resources is a good alternative to overcome such pollutant generators. Hybrid Optimization Model for Electric Renewable (HOMER) software is used to determine the economic feasibility of the proposed configuration. Assessment of renewable resources consisting in wind and solar potentials, load profile determination and sensitivity of different parameters analysis were performed. The cost of energy (COE) of 0.226 $/kWh is very competitive with those found in literature.

scholarly journals Design & Optimization of a Power Generation System based on Renewable Energy Technologies

2019 ◽  
Vol 8 (11) ◽  
pp. 1134-1138
Keyword(s):  
Hybrid Structure ◽  
Generation System ◽  
Renewable Energy Technologies ◽  
Energy Technologies ◽  
Load Demand ◽  
Cost Of Energy ◽  
Logical Principle ◽  
Power Generation System ◽  
Hybrid Optimization Model ◽  
The Cost

The application of this study is to make an instrument that will consider wind, solar, and biomass assets on a location and decide how these three wellsprings of energy would be best consolidated into a hybrid structure to take care of the load demand. The apparatus will enable the user to enter the specifications for different models for each sort of framework, and after that meet the load based on user inputted parameters. The cost of energy will then be dissected, permitting the consumer to perceive what mix of components would bring about the minimum costly cost of energy, and additionally unique ways the load might be met. The software named as HOMER (Hybrid Optimization Model for Electric Renewables) will consider not just the logical principle of vast energy; it will likewise represent economic and required factors.

scholarly journals Techno-Economic Feasibility Study of Investigation of Renewable Energy System for Rural Electrification in South Algeria

2018 ◽  
Vol 8 (5) ◽  
pp. 3421-3426 ◽  
Author(s):  
F. Chermat ◽  
M. Khemliche ◽  
A. E. Badoud ◽  
S. Latreche
Keyword(s):  
Greenhouse Gas Emission ◽  
Electrical Energy ◽  
Energy System ◽  
Economic Feasibility ◽  
Maintenance Cost ◽  
Management Algorithm ◽  
Cost Of Energy ◽  
The Cost ◽  
Operation And Maintenance Cost ◽  
Different Sources

This work aims to consider the combination of different technologies regarding energy production and management with four possible configurations. We present an energy management algorithm to detect the best design and the best configuration from the combination of different sources. This combination allows us to produce the necessary electrical energy for supplying habitation without interruption. A comparative study is conducted among the different combinations on the basis of the cost of energy, diesel consumption, diesel price, capital cost, replacement cost, operation, and maintenance cost and greenhouse gas emission. Sensitivity analysis is also performed.

scholarly journals Analysis of Techno-Economic-Environmental Suitability of an Isolated Microgrid System Located in a Remote Island of Bangladesh

2020 ◽  
Vol 12 (7) ◽  
pp. 2880 ◽  
Author(s):  
Hasan Masrur ◽  
Harun Or Rashid Howlader ◽  
Mohammed Elsayed Lotfy ◽  
Kaisar R. Khan ◽  
Josep M. Guerrero ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Economic Feasibility ◽  
Added Value ◽  
Renewable Energy Resources ◽  
Hybrid Microgrid ◽  
Load Demand ◽  
Cost Of Energy ◽  
Remote Island ◽  
Heavy Burden ◽  
Energy Options

Following a rise in population, load demand is increasing even in the remote areas and islands of Bangladesh. Being an island that is also far from the mainland of Bangladesh, St. Martin’s is in need of electricity. As it has ample renewable energy resources, a renewable energy-based microgrid system seems to be the ultimate solution, considering the ever-increasing price of diesel fuel. This study proposes a microgrid system and tests its technical and economic feasibility in that area. All possible configurations have been simulated to try and find the optimal system for the island, which would be eco-friendly and economical with and without considering renewable energy options. The existing power supply configuration has also been compared to the best system after analyzing and investigating all technical and economic feasibility. Sensitivity and risk analysis between different cases provide added value to this study. The results show that the current diesel-based system is not viable for the island’s people, but rather a heavy burden to them due to the high cost of per unit electricity and the net present cost. In contrast, a PV /Wind/Diesel/Battery hybrid microgrid appeared to be the most feasible system. The proposed system is found to be around 1.5 times and 28% inexpensive considering the net present cost and cost of energy, respectively, with a high (56%) share of renewable energy which reduces 23% carbon dioxide.

scholarly journals A Techno-Economic Study of 100% Renewable Energy for a Residential Household in China

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2109 ◽  
Author(s):  
Zhe Lv ◽  
Zengping Wang ◽  
Wanyu Xu
Keyword(s):  
Renewable Energy ◽  
Net Present Value ◽  
Evaluation Model ◽  
Economic Feasibility ◽  
Energy Structure ◽  
Renewable Energy Resources ◽  
Depth Of Discharge ◽  
Cost Of Energy ◽  
Pollution Emissions ◽  
Wind Resource

In the context of global warming and energy shortage, this paper discusses the techno-economic feasibility of a residential household based on 100% renewable energy in China. The energy storage life, equipment’s residual value, system shortage capacity and atmospheric pollution emissions were considered comprehensively. A life cycle evaluation model based on the net present value (NPV) was built. Taking a real household as an example, the levelised cost of energy (LCOE) is 0.146 $/kW and the unmet load is only 0.86%, which has a big economic advantage when compared with diesel generators. If grid-connected, the system can bring $8079 in 25 years when the LCOE is −0.062 $/kW. The effects of the allowed shortage capacity, renewable energy resources, battery price and the allowed depth of discharge on the economy and energy structure were examined. For example, due to the features of the residential load, the influence of wind resource richness is more obvious than the irradiance. The maximum depth of discharge has less impact on the economy. This paper verifies the techno-economic rationality and feasibility of 100% renewable energy for a household.

Techno-Economic Feasibility Analysis of Pumped Storage Hydroelectricity in Abandoned Underground Coal Mines

2020 ◽  
Vol 142 (12) ◽  
Author(s):  
Dacheng Shang ◽  
Peng Pei ◽  
Yujun Zuo
Keyword(s):  
Coal Seam ◽  
Capital Investment ◽  
Economic Feasibility ◽  
Abandoned Mines ◽  
Cost Of Energy ◽  
Calculation Results ◽  
Pumped Storage ◽  
Geological Constraints ◽  
The Cost ◽  
Cycle Efficiency

Abstract It is anticipated that utilizing the underground space in abandoned mines to build and operate pumped-storage hydroelectricity (PSH) plants can reduce capital investment and geological constraints. However, there are currently few detailed investigations into techno-economic feasibility except for conceptual studies. In this paper, an underground coal mine in Guizhou, China was used as a reference, and the PSH layout was designed; in addition, the head loss, plant efficiency, and major cost components were investigated. The calculation results show that the capital investment of mine-based PSH was 33–50% less than that of conventional PSH. Sensitivity analysis found a clear influence of coal seam inclination on the performance of the mine-based PSH. Under the assumed conditions, the plant cycle efficiency increased from 62.7% to 71.5% when the coal seam dip varied from 5 deg to 25 deg. Depending on different price scenarios, when the coal seam inclination was steep enough, the cost of energy storage of a mine-based PSH plant was competitive compared with conventional PSH, and the plant could even become profitable. The influence of the dip of coal seam was more pronounced when in the lower range (5–15 deg) than the higher range (15–25 deg).

Deliberate Salinization of Seawater for Desalination of Seawater

2017 ◽  
Vol 140 (3) ◽  
Author(s):  
Francisco J. Arias
Keyword(s):  
Volume Fraction ◽  
Feed Solution ◽  
Economic Feasibility ◽  
Seawater Desalination ◽  
High Concentration ◽  
Electrical Grid ◽  
Draw Solution ◽  
Cost Of Energy ◽  
Salt Deposits ◽  
The Cost

The basis of a novel method for seawater desalination is outlined. In this work, pressure-retarded osmosis (PRO) energy is obtained and used posteriorly for the reverse osmosis (RO) process for seawater desalination. Although PRO process coupled with an RO process has been studied in the past, however, in this work, there is a fundamental difference. Instead of bringing river or wastewaters with low salinity to the coast to be mixed with the seawater to run the PRO process, here is the seawater which is deliberately salinized. This technique has one important consequence, namely, that it is no longer required to be in places where rivers or wastewaters flow into the sea. This important difference eliminates this until now somehow paradoxical requirement if one considers that regions needing desalination are generally poor of water resources. On the other hand, it is not a coincidence that regions needing desalination plants are also regions with rich open salt deposits in the neighborhood; high evaporation, high concentration of salt deposits, and the need for freshwater are all of them directly correlated. Therefore, the idea proposed in the paper is consistent with the problem. The high evaporation in the region which is causing the need for desalination also is creating the solution to do this by using the salt deposits created. The economic feasibility of this method is preliminarily assessed in terms of the thermodynamic limits of extractable energy and then with the cost of the salt required to obtain this energy which is compared with the price from electrical grid. It was found that in order to reduce the amount of salt required for the process, and to make the cost of energy competitive, it is necessary to direct the hypersaline draw solution (draw solution) in a cyclic loop and to have the highest possible volume fraction for the nonsalinized solution (feed solution). Additional R&D is required to explore the possibilities of this concept.

A Levelized Cost of Energy (LCOE) Model for Wind Farms That Includes Power Purchase Agreement (PPA) Energy Delivery Limits

2016 ◽  
Author(s):  
Maira Bruck ◽  
Navid Goudarzi ◽  
Peter Sandborn
Keyword(s):  
Wind Farm ◽  
Cost Model ◽  
Wind Farms ◽  
Cost Models ◽  
Renewable Energy Resources ◽  
Supply Source ◽  
Levelized Cost ◽  
Cost Of Energy ◽  
Expected Performance ◽  
The Cost

The cost of energy is an increasingly important issue in the world as renewable energy resources are growing in demand. Performance-based energy contracts are designed to keep the price of energy as low as possible while controlling the risk for both parties (i.e., the Buyer and the Seller). Price and risk are often balanced using complex Power Purchase Agreements (PPAs). Since wind is not a constant supply source, to keep risk low, wind PPAs contain clauses that require the purchase and sale of energy to fall within reasonable limits. However, the existence of those limits also creates pressure on prices causing increases in the Levelized Cost of Energy (LCOE). Depending on the variation in capacity factor (CF), the power generator (the Seller) may find that the limitations on power purchasing given by the utility (the Buyer) are not favorable and will result in higher costs of energy than predicted. Existing cost models do not take into account energy purchase limitations or variations in energy production when calculating an LCOE. A new cost model is developed to evaluate the price of electricity from wind energy under a PPA contract. This study develops a method that an energy Seller can use to negotiate delivery penalties within their PPA. This model has been tested on a controlled wind farm and with real wind farm data. The results show that LCOE depends on the limitations on energy purchase within a PPA contract as well as the expected performance characteristics associated with wind farms.

scholarly journals The results of the competitiveness analysis of photovoltaic microgeneration systems in the Russian Federation

2019 ◽  
Vol 486 (5) ◽  
pp. 543-546
Author(s):  
T. S. Gabderakhmanova ◽  
O. S. Popel
Keyword(s):  
Energy Storage ◽  
Dynamic Modelling ◽  
Electrical Energy ◽  
Economic Feasibility ◽  
Government Support ◽  
Feasibility Assessment ◽  
Pv Systems ◽  
Cost Of Energy ◽  
Regulatory Standards ◽  
The Cost

The results of the economic feasibility assessment of photovoltaic (PV) microgeneration systems by the criterion of the cost of energy are presented. The assessment is based on dynamic modelling of three different configurations of grid-connected PV systems - without energy storage, with electrical energy storage and with thermal energy storage - performed for weather and electricity tariff conditions of several prospective Russian regions. Government support measures and regulatory standards currently developing in Russia for microgeneration technologies are taken into account. It is shown that under certain conditions PV microgeneration technologies could be economically feasible in some energy isolated areas and non-pricing zones of the wholesale electricity and capacity market of Russia, particularly in the Sakha Republic, whereas in pricing zones - couldn’t for any of the considered system configurations.

scholarly journals Optimal Grid-Connected PV System for a Campus Microgrid

2018 ◽  
Vol 12 (3) ◽  
pp. 899 ◽  
Author(s):  
Mohammed Reyasudin Basir Khan ◽  
Jagadeesh Pasupuleti ◽  
Jabbar Al-Fattah ◽  
Mehrdad Tahmasebi
Keyword(s):  
Hybrid System ◽  
Renewable Resources ◽  
System Development ◽  
Input Parameter ◽  
Storage System ◽  
Battery Storage ◽  
Pv System ◽  
Load Profile ◽  
Cost Of Energy ◽  
Hybrid Optimization Model

<span lang="EN-US">This paper discusses on the implementation of a grid-connected PV system for university campus in Malaysia. The primary goal of this study is to develop a grid-connected microgrid comprises of Photovoltaic (PV) and a battery storage system to meet the campus load demand and minimize grid dependency. The microgrid modeled and simulated in Hybrid Optimization Model for Electrical Renewable (HOMER) software. Actual load profile and renewable resources were used as an input parameter for the hybrid system. The campus selected is Universiti Kuala Lumpur, British Malaysian Institute as it represents typical load profile for a small campus. Therefore, the results can be used to represent hybrid system development for other small campuses in Malaysia as well. Firstly, optimal sizing of renewable energy (RE) were simulated with respect to total Net Present Cost (NPC) and Cost of Energy (COE). Then, sensitivity analysis conducted to determine the system performance based on changes of load growth, and renewable resources. The results demonstrate optimal HRES combinations for the campus microgrid comprises of 50 kWp of PV generations with 50 kW inverter. However, inclusion of 576 kWh battery storage system will increase the NPC but has higher RE penetration.</span>

scholarly journals SPENT GRAIN IN FEEDING YOUNG CATTLE

2020 ◽  
Author(s):  
Ж.С. Майорова ◽  
О.А. Федосова ◽  
Н.И. Торжков ◽  
Г.М. Туников ◽  
Е.Н. Правдина
Keyword(s):  
Average Daily Gain ◽  
Live Weight ◽  
Economic Feasibility ◽  
Cost Of Energy ◽  
Bull Calves ◽  
Spent Grain ◽  
Young Cattle ◽  
The Cost ◽  
Experimental Group

Статья отражает исследования по применению свежей пивной дробины в кормлении бычков на заключительном этапе откорма и сухой пивной дробины при выращивании ремонтных телок в возрасте 6-12 месяцев, которые показали ее положительное влияние на качество кормовых рационов и продуктивность животных. В основном рационе контрольных групп часть комбикорма заменяли пивной дробиной: при откорме бычков – 5 кг свежей дробины взамен 1 кг комбикорма, при выращивании телок – 0,5 кг сухой дробины взамен аналогичного количества комбикорма. За счет применения пивной дробины была повышена протеиновая ценность рационов и оптимизирован их микроминеральный состав, что способствовало активизации обмена веществ в организме животных и повышению их продуктивности. У бычков опытной группы живая масса в конце откорма и среднесуточный прирост были, соответственно, выше на 2,5 % и 7,4 %, нежели у контрольных животных. Данные показатели у телочек опытной группы были выше контрольных значений на 4,1 и 6,5 % соответственно. Затраты энергетических кормовых единиц на 1 кг прироста живой массы у животных опытных групп были ниже на 7,3-7,6 % в сравнении с контролем. Установлена экономическая целесообразность применения свежей и сухой пивной дробины в рационах молодняка крупного рогатого скота, так как за счет повышения интенсивности роста животных и значительной экономии зерновых кормов себестоимость 1 кг прироста живой массы, полученного на рационах с дробиной, была ниже на 6,2 % у телочек и на 10,4 % у бычков. The article reflects studies on the use of fresh spent grain when feeding bulls at the final stage of fattening and dry spent grain when growing replacement heifers aged 6-12 months, which showed its positive effect on the quality of feed rations and animal productivity. Part of the mixed fodder in the main diet of the control groups was replaced with spent grain. Bull calves got 5 kg of fresh spent grain instead of 1 kg of the mixed fodder and heifers got 0.5 kg of dry spent grain instead of the same amount of the mixed fodder. Thanks to pent grain, the protein value of diets was increased and their micro mineral composition was optimized, which contributed to the activation of metabolism in animals and increased their productivity. The live weight of the bulls of the experimental group at the end of the fattening was 2.5% higher than that in the control animals and the average daily gain was 7.4% higher. These indicators in the heifers of the experimental group were higher than the control values by 4.1% and 6.5%, respectively. The cost of energy feed units per 1 kg of increase in live weight in animals of the experimental groups was lower by 7.3-7.6%, compared with the control. The economic feasibility of using fresh and dry spent grain in the diets of young cattle was established, since due to an increase in the growth rate of animals and significant savings in grain feed, the cost of 1 kg of live weight gain obtained from rations with spent grain was 6.2% lower in heifers and 10.4% in bulls.

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