Journal of Energy Systems最新文献_第3页

A comprehensive analysis on the grid-tied solar photovoltaics for clean energy mix and supply in Nigeria’s on-grid power 并网太阳能光伏发电在尼日利亚并网电力中的清洁能源结构和供应的综合分析

Journal of Energy Systems Pub Date : 2023-03-31 DOI: 10.30521/jes.988844

C. Diyoke, U. Ngwaka, K. Ugwu

{"title":"A comprehensive analysis on the grid-tied solar photovoltaics for clean energy mix and supply in Nigeria’s on-grid power","authors":"C. Diyoke, U. Ngwaka, K. Ugwu","doi":"10.30521/jes.988844","DOIUrl":"https://doi.org/10.30521/jes.988844","url":null,"abstract":"Nigeria’s power infrastructure is dominated by polluting grid-connected fossil-based power systems. The Nation currently suffers from an acute electricity shortage, making nearly 40% of on-grid customers receive unreliable and inconsistent power below their demand. Solar resources are widespread in the country at considerably good potential than in many European nations. Nevertheless, Nigeria's solar photovoltaic (PV) installation capacity could be better. This paper presents the techno-economic, environmental and risk analysis of a grid-connected 10 kW, 100 kW, and 1 MW PV system for three customer segments in Abuja, Nigeria. It is found that a 1 MW grid-tied PV system is very viable at an electricity export rate not below 0.01 $/kWh and a total initial cost (TIC) of not more than 2000 $/kW for fixed axis system and 2600 $/kWh or lower for the two-axis system. The 10 kW and 100 kW PV systems are only financially viable with fiscal incentives. However, they become profitable with a minimum feed-in tariff of about 0.294, 0.297, 0.223 and 0.214 $/kWh for the fixed 10 kW, 2-axis 10 kW, fixed 100 kW and two-axis 100 kW systems, respectively.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45598631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Design and implementation of a robust ANN-PID corrector to improve high penetrations photovoltaic solar energy connected to the grid 一种鲁棒ANN-PID校正器的设计与实现，以改善高穿透光伏太阳能并网

Journal of Energy Systems Pub Date : 2023-03-31 DOI: 10.30521/jes.1053423

D. Gueye, A. Ndiaye, Amadou Diao

引用次数: 0

Numerical investigations on a triple fluid heat exchanger with helical and sinusoidal coils 螺旋盘管和正弦盘管三层流体换热器的数值研究

Journal of Energy Systems Pub Date : 2023-03-31 DOI: 10.30521/jes.1116707

Suresh Mariappan

{"title":"Numerical investigations on a triple fluid heat exchanger with helical and sinusoidal coils","authors":"Suresh Mariappan","doi":"10.30521/jes.1116707","DOIUrl":"https://doi.org/10.30521/jes.1116707","url":null,"abstract":"A modification is made in the existing concentric heat exchanger design to enhance its heat duty. A standard concentric tube heat exchanger is modified by considering two inner tubes with a combination of helical and sinusoidal coils. Numerical studies are performed in this triple fluid heat exchanger to assess its thermal performance by taking into account mass flow rate, fluid temperatures, heat transfer, which are governed by fundamental heat transfer equations. Computational fluid dynamics simulation methodology together with local and element-by-element method is applied with a MatLab computer code. Hot water and milk fluids are used as working fluids in helical and sinusoidal coils, respectively. Cooling water is used as shell side fluid. The attainment of high heat-load-per-unit-area and high surface-area-to-volume ratio is used as optimizing parameter in the simulations. The helical coil provides an increase in heat transfer rate and overall heat transfer coefficient increases by a percentage 13% for varying hot fluid flow rates, when it is compared with the sinusoidal coil. The pressure drop for the helical coil increases, exponentially compared to the sinusoidal coil, thereby it shows a higher pumping power for the helical coil.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46377049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Wind turbine inspection with drone: Advantages and disadvantages 无人机风力机检测:优缺点

Journal of Energy Systems Pub Date : 2023-03-31 DOI: 10.30521/jes.1148877

Harun Tanriverdi̇, Güzide Karakuş, Ahmet Ulukan

引用次数: 0

Energy efficient cooling through natural ventilation in Kosovo 科索沃通过自然通风实现节能制冷

Journal of Energy Systems Pub Date : 2023-03-31 DOI: 10.30521/jes.1090315

M. Dugolli

{"title":"Energy efficient cooling through natural ventilation in Kosovo","authors":"M. Dugolli","doi":"10.30521/jes.1090315","DOIUrl":"https://doi.org/10.30521/jes.1090315","url":null,"abstract":"The buildings consume nearly 55% of global electricity. As people are forced to spend more time indoors after pandemic COVID 19, energy efficient, well ventilated, adequate indoor air quality became critical for their health. The household energy consumption is mostly for heating but also for cooling in Kosovo. Aiming to improve energy efficiency, a passive cooling strategy can be applied by using a natural ventilation as the most essential method. However, that requires an analysis of different factors such as positions and the sizes of the openings within one area, the specific period used for ventilation, and the external temperatures and conditions. In this work, the computer application Optivent 2 was used to analyze a generic airflow strategy and evaluate the decisions regarding the feasibility of cooling with natural ventilation for a single house in Kosovo during the warmest month of the year (i.e. August). The results prove that the natural ventilation during the day at the houses, which the areas have only one-sided openings, is effective only for fresh air flow but not sufficient for cooling purposes. When the openings are designed on the opposite walls of the rooms or areas, the conditions will enable that through cross ventilation, the area will be cooled at the same time, by achieving up to 90% of the accessibility limits of comfort, both during the day and nights, at different scenarios on the warmest summer months in Kosovo. These findings will help the architects of Kosovo to identify the proper and most effective passive designs strategy, when it comes to buildings cooling during the summer, in order to achieve the maximal benefit of their designs and the operation of their designed building.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46072889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Grid-connected photovoltaics prosumers to support smart city development in Rwanda: A case study for Ayabaraya Village 并网光伏产消户支持卢旺达智慧城市发展:Ayabaraya村案例研究

Journal of Energy Systems Pub Date : 2023-03-31 DOI: 10.30521/jes.1086675

Fabien Mukundufite, Jean D'amour Ni̇yonsaba, Jean Marie V. Bikorimana, Alexander KYARUZİ LUGATONA

{"title":"Grid-connected photovoltaics prosumers to support smart city development in Rwanda: A case study for Ayabaraya Village","authors":"Fabien Mukundufite, Jean D'amour Ni̇yonsaba, Jean Marie V. Bikorimana, Alexander KYARUZİ LUGATONA","doi":"10.30521/jes.1086675","DOIUrl":"https://doi.org/10.30521/jes.1086675","url":null,"abstract":"Access to electricity is among the important targets in Rwanda as in other regions. The grid-connected photovoltaic (PV) prosumers market segment can contribute to the rate of access to electricity in Rwanda. Grid connected PV prosumers contribute in not only increasing electricity generation capacity but also producing affordable and reliable electrical energy. Therefore, the current research analyzes the possibilities of interconnection of small-scale prosumers with a national grid. In addition, the bidirectional flow of electricity either from prosumer grid and vice versa, aiming at monitoring the continuous power supply of the load is analyzed. The study is conducted in Ayabaraya village in Rwanda and the load profile for residential, commercial and industrial prosumers are analyzed. In this research, meteorological data from Photovoltaic Geographical Information System (PVGIS) up to 2016 is used to give global horizontal irradiation and ambient temperature. The amount of energy imported from and exported to the grid is determined by the connected appliances, the capacity of the PV system, and the amount of available irradiance at the time. The Home Energy Management System (HEMS), inverter control strategies, and prosumer load types are considered. The simulation reveals that available irradiance less than 30W/m2 at a time is below the grid-tie inverter's threshold power thus, the prosumer imports electricity from the grid. At irradiance larger than 30W/m2, the prosumer may optimize self-consumption and injects the surplus into grid.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45357066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modelling and fuzzy logic based control scheme for a series hybrid electric vehicle 基于模糊逻辑的串联混合动力汽车建模控制方案

Journal of Energy Systems Pub Date : 2023-03-31 DOI: 10.30521/jes.1107190

Latif Kasım Uysal, N. Altin

{"title":"Modelling and fuzzy logic based control scheme for a series hybrid electric vehicle","authors":"Latif Kasım Uysal, N. Altin","doi":"10.30521/jes.1107190","DOIUrl":"https://doi.org/10.30521/jes.1107190","url":null,"abstract":"Ever stricter emission regulations, declining petroleum resources, increasing pollution, and global warming triggered an interest in e-mobility. Although fully electrified transportation is targeted, hybrid electric vehicles have become attractive during this transition period due to reasons such as battery challenges, range anxiety, grid capacity, and charging infrastructure. Hybrid electrical vehicles require challenging energy management systems due to the increasing number of components and energy conversions. This paper aims to introduce a simple yet effective control scheme to control the battery state-of-charge (SOC) and regenerative braking of a hybrid electric vehicle. For this purpose, a fuzzy logic controller is developed, three inputs as the SOC, driver demand, and vehicle velocity are defined. Instead of torque or power requirement, which are commonly used as controller inputs in the literature, a more straightforward method is adopted by using the accelerator and brake pedal positions. The controller manages the engine power and regenerative braking intensity. A series hybrid electric vehicle model is created in the MATLAB/Simulink environment to validate the performance of the proposed controller. The proposed controller aims to keep the SOC between 30-40% after charge depleting mode, and ensures prevention of regenerative braking at high SOC values to prevent overcharging. Simulations have been performed according to NEDC and WLTC, show that the proposed controller is able to realize design objectives.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41505366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of PCM type on photocell performance using heat pipe-PCM cooling system: A numerical study 热管-PCM冷却系统中PCM类型对光电池性能影响的数值研究

Journal of Energy Systems Pub Date : 2023-03-31 DOI: 10.30521/jes.1159281

Ramadan Gad, H. Mahmoud, S. Ookawara, Hamdy Hassan

{"title":"Impact of PCM type on photocell performance using heat pipe-PCM cooling system: A numerical study","authors":"Ramadan Gad, H. Mahmoud, S. Ookawara, Hamdy Hassan","doi":"10.30521/jes.1159281","DOIUrl":"https://doi.org/10.30521/jes.1159281","url":null,"abstract":"The effectiveness of a hybrid cooling system consisting of flat heat pipes (HP) and a heat sink of phase change material (PCM) for the temperature regulation of the photocell (PV) is studied. The system is mathematically modeled and numerically solved by using MatLab software. The impact of the type of PCM (RT25, RT35, and RT42) in summer on the performance of the hybrid photocell cooling system is analyzed. Results prove that the HP-PCM cooling system performs better than the natural photocell cooling. PCM with a low melting point is more efficient for electric performance than a high melting point. For a given PCM thickness of 4 cm, the maximum temperature of the photocell is reduced by 8.7 °C when PCM RT25 is used as a heat sink compared to 7.5 °C and 7.3 °C for RT35 and RT42, respectively. RT25-based PV/HP-PCM system outperformed a conventionally cooled photocell in terms of electrical efficiency by 5.3%. In comparison, RT35 and RT42 yield incremental gains of 5% and 4.5 %, respectively. As the PCM melting point is lowered, the hourly thermal efficiency increases with a peak of 48.9% for RT25, 33.7% for RT35, and 32.2% for RT42, respectively.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43752728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

The heat transfer with nanomaterial enhanced phase change materials in different container shapes 纳米材料增强相变材料在不同容器形状下的传热研究

Journal of Energy Systems Pub Date : 2023-03-18 DOI: 10.30521/jes.1160434

Allan Muzhanje, M. Hassan, S. Ookawara, Hamdy Hassan

{"title":"The heat transfer with nanomaterial enhanced phase change materials in different container shapes","authors":"Allan Muzhanje, M. Hassan, S. Ookawara, Hamdy Hassan","doi":"10.30521/jes.1160434","DOIUrl":"https://doi.org/10.30521/jes.1160434","url":null,"abstract":"The heat transfer is studied during the melting and solidification of sp11 and sp24 phase change materials in different container shapes. The materials are further mixed with nano-alumina and nano CuO enhancements. We aim to identify the most favorable phase change material for free-cooling in summer and free-heating in winter. Ansys Fluent 20.2 is used to analyze the 2D models for the melting and solidification mechanisms of the phase change samples in cylindrical, square, rectangular, and elliptical-shaped capsules. The nanomaterial-enhanced phase change material improves the melting and solidification behavior over the base phase change material by as much as 9.8%. It is further observed that the nanomaterial-enhanced phase change material particularly in the rectangular-shaped containers has faster melting and solidification rates by over 43% compared to the others. The material sp24 with 4% nano-alumina in a rectangular profile has the shortest melting times ~70-100 mins, when the inlet temperatures are 313 and 318 K. The same material has the shortest solidification time of 426 mins, two times faster compared to the 928 mins observed with the cylindrical capsule under the same conditions. The Sp11 with the nano-alumina in a rectangular capsule also has a short melting time of 134 mins. The rectangular profile is found capable of achieving the highest temperature drop about 3.3 K during free cooling of inlet air using nano-enhanced sp24. A progress is realized in unmasking the potential of the thermal energy battery using hybrid geometry and nanomaterial enhancements.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48816830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Benefits of Renewable Energy for Public Health: A Bibliometric Analysis 可再生能源对公共健康的益处:文献计量学分析

Journal of Energy Systems Pub Date : 2023-03-11 DOI: 10.30521/jes.1252122

H. N. DURMUŞ ŞENYAPAR

{"title":"Benefits of Renewable Energy for Public Health: A Bibliometric Analysis","authors":"H. N. DURMUŞ ŞENYAPAR","doi":"10.30521/jes.1252122","DOIUrl":"https://doi.org/10.30521/jes.1252122","url":null,"abstract":"Renewable energy (RE) is a field in which an increasing number of academic studies are being conducted on multiple dimensions, including technical, economic, political, and social. Wide and varied disciplines conduct research on the processes of making an investment decision in renewable energy, developing, and adopting policies for this purpose, selecting RE suitable for the location, establishing it by taking economic and environmental factors into account, developing energy distribution and storage systems, and supporting regional development. To accurately calculate the installation costs, which are viewed as one of the barriers to a greater use of renewable energy, the co-benefits of RE must be analyzed and transferred to this calculation, and thus to the decision-making processes. Understanding these co-benefits will also facilitate consumer adoption of sustainable energy sources. In addition to economic growth, financial development, employment growth, and regional development, it is crucial to understand the public health benefits of renewable energy. Through bibliometric analysis, which permits the quantification and visualization of qualitative data, the status and development of the literature on the health benefits of RE are examined in this study. The study determined the most researched topics, current issues and trends, and prominent issues in academic studies. The transition to environmentally friendly energies can be accelerated by increasing public awareness of health co-benefits from a more holistic perspective.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48341142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3