Journal of Energy Systems最新文献

{"title":"An adaptive neuro-fuzzy inference system-based approach for daily load curve prediction","authors":"A. Laouafi, M. Mordjaoui, T. Boukelia","doi":"10.30521/JES.434224","DOIUrl":"https://doi.org/10.30521/JES.434224","url":null,"abstract":"Forecasting future electricity demand is one of the most important areas in electrical engineering, due to its vital role for secure and profitable operations in power systems. In recent years, the advent of new concepts and technologies such as deregulation of electricity market, smart grids, electric cars and renewable energy integration have introduced great challenges for power system managers and consequently, the field of electric load forecasting becomes more and more important. This paper describes the use of an adaptive neuro-fuzzy inference system approach for daily load curve prediction. The methodology we propose uses univariate modeling to recognize the daily and weekly patterns of the electric load time series as a basis for the forecast. Results from real-world case study based on the electricity demand data in France are presented in order to illustrate the proficiency of the proposed approach. With an average mean absolute percentage error of 2.087%, the effectiveness of the proposed model is clearly revealed.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44095848","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}

{"title":"Piezo-actuated common rail injector structure and efficient design","authors":"Hasan Köten, Ebubekir Can Gunes, K. Guner","doi":"10.30521/JES.453560","DOIUrl":"https://doi.org/10.30521/JES.453560","url":null,"abstract":"Piezo-actuated common rail injectors are often utilized in today’s automobile engines’ fuel systems. This high-tech instrument decreases fuel consumption, thereby harmful exhaust emissions are also lowered especially in diesel ignition engines. Owing to ultra-high pressure in piezo-injection systems, fuel droplets are scaled down into a smaller particle form and thus provided more efficient combustion. Pulverized fuel droplets are evaporated and oxidized in a very short time and they provide exact combustion inside the combustion chamber.  In this study, numerical simulation of a piezo-actuated common rail injector fluid-mechanical model with detail is demonstrated. The hydraulic and mechanical component interaction is modeled through the fluid-mechanical components. Thus, the piezo injector dynamics are predicted based on the geometry and the physical quantities describing the equipment. Input voltage in the entrance is used to describe the piezo actuator force for piezo-electric material. In model, fuel flows from the common rail to a tee that separates the flow into two paths: fuel gallery and valve with the inlet orifice. Using this detailed model, behavior of the piezo injector, effects of the injector parameters on the fuel flow were investigated numerically and results were represented.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42162309","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}

{"title":"Dual axis solar angle tracking system without any sensor","authors":"Z. Er, Elif Balcı","doi":"10.30521/JES.456606","DOIUrl":"https://doi.org/10.30521/JES.456606","url":null,"abstract":"Owing to swift and irrepressible increase in globalization, the power requirement and energy utilization are also increasing day by day. To compensate the power needs, various renewable energy sources which consist solar energy systems are been used in order to satisfy this ample demand. In order to eliminate the efficiency limits of photo-voltaic panel in a solar energy system, there are several methods by solar tracking. In this study, a dual axis solar tracker system is newly designed and tested at several times to track the sun position. A new approach to solar panel systems has been investigated and designed in this study via motivation of no sensor and less mechanical construction. Since a fixed solar panel will not work with the highest solar radiation at every moment of a day; a mobile system which has solar tracker can consider that it will work more efficiently. Owing to the restricted solar radiation reception of fixed panel systems for, a new fabricate-more efficient solar panel has been designed. Photo-voltaic tracking mechanism having two axes has been constructed and fabricated. The parts of the system have selected carefully via the multi decision criteria and boundary conditions of the system has settled by calculating solar angles. This paper presents the mentioned design construction detail and -however there is no any sensor- working results of the tracker whereby the movement of a PV panel was controlled to setting of programming of a programmable logic-controller (PLC). To perform the technical task, all electronic circuits and necessary software have been designed and developed with some opportunities in industry and Istanbul Technical University. Fabricated this new design tracker works very well and it is tested with several experimental studies. The results of the experimental studies represent best performance of the fabricated new design. Due to results, sensibility for vertical axis movement of the system is stated 1 degree via calculation. Based on the obtained results this study can conclude that the fabricated new design for a solar dual axis tracking system offers several advantages concerning the improvement of efficiency.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44463362","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}

{"title":"Modelling a Possibility Framework of a Smart Self Sustainable Hybrid Power Generation System for a Typical Residential Loading","authors":"I. Oladeji, A. Oyinlola","doi":"10.30521/JES.413691","DOIUrl":"https://doi.org/10.30521/JES.413691","url":null,"abstract":"Generation of electricity using fossil fuels could be regarded as the greatest invention of mankind. However, with the depletion of this resource and also due to the effect of burning fossil fuels on the environment, it is imperative to find an alternative to generating electricity for local consumption using non-fossil fuel methods. In the bid to key into the global idea of power generation decarburization and also smart distribution system through the internet of things (IOT), this paper presents an active redundancy possibility framework for generating constant electricity from the motor-generator (M-G) and the battery-inverter (B-I) systems. The specifications of each component can be obtained from design models presented in this paper. The functionality of the system is achieved through the smart home distribution hub (SHDH). Each unit are modeled and simulated to obtain the transfer functions. The result of the residential loading is presented. The simulation results show that the system is achievable and also stable under circumstances which are being monitored and controlled by the smart hub. The framework presented in this paper has proved to be a viable and smart alternative source of electric energy for residential loading.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43684134","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}