Pub Date : 2018-10-01DOI: 10.1109/ICEPE.2018.8559920
C. Dumitrescu, A. Plesca, M. Adam, Costică Nițucă, A. Dragomir
This paper proposes a methods to reduce energy consumption in an operational data center facility. Data centers are the places where Information Technology and Communications equipment are hosted. From the day when the first computer was developed, the room that houses the mainframe faced with challenges regarding power and cooling requested, redundancy and availability for the systems to avoid any interruption, also with capacity planning for future expansions. All back-up and hot stand-by system are more often over-sized the focus are on availability nor on efficiency. The Information and Communication Technology (ICT) evolution, the need to compute and store more information lead to exponential increase of ICT equipment. The technology evolution lead to changes of equipment hosted in Data Centers with more performant systems but with high density of energy consumed. The virtualization of services is a way to increase computing performance with increasing utilization load of processors. Overall IT systems providing, the same functionality more efficient, consuming less power. Usually the evolution of ICT infrastructure (consolidation) is not correlated with facility changes that will impact the performance of existing data center. Increasing the power density in an operational computer room will produce a major impact to cooling system capacity and efficiency. The challenge is to avoid overheat areas (hot spots) and to provide same environment condition without changing the space geometry or design, increasing the efficiency and optimize energy consumption.
{"title":"Methods for Reducing Energy Consumption, Optimization in Operational Data Centers","authors":"C. Dumitrescu, A. Plesca, M. Adam, Costică Nițucă, A. Dragomir","doi":"10.1109/ICEPE.2018.8559920","DOIUrl":"https://doi.org/10.1109/ICEPE.2018.8559920","url":null,"abstract":"This paper proposes a methods to reduce energy consumption in an operational data center facility. Data centers are the places where Information Technology and Communications equipment are hosted. From the day when the first computer was developed, the room that houses the mainframe faced with challenges regarding power and cooling requested, redundancy and availability for the systems to avoid any interruption, also with capacity planning for future expansions. All back-up and hot stand-by system are more often over-sized the focus are on availability nor on efficiency. The Information and Communication Technology (ICT) evolution, the need to compute and store more information lead to exponential increase of ICT equipment. The technology evolution lead to changes of equipment hosted in Data Centers with more performant systems but with high density of energy consumed. The virtualization of services is a way to increase computing performance with increasing utilization load of processors. Overall IT systems providing, the same functionality more efficient, consuming less power. Usually the evolution of ICT infrastructure (consolidation) is not correlated with facility changes that will impact the performance of existing data center. Increasing the power density in an operational computer room will produce a major impact to cooling system capacity and efficiency. The challenge is to avoid overheat areas (hot spots) and to provide same environment condition without changing the space geometry or design, increasing the efficiency and optimize energy consumption.","PeriodicalId":343896,"journal":{"name":"2018 International Conference and Exposition on Electrical And Power Engineering (EPE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130305927","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}
Pub Date : 2018-10-01DOI: 10.1109/ICEPE.2018.8559879
Oprea Roxana, I. Marcel, Machidon Dragos, B. Ravan
Nowadays photovoltaic (PV) cells have a rather small conversion efficiency, generally under 20 percent for the commercial units. Further on, the amount of electricity produced by a photovoltaic system is deeply influenced by some external factors, the most significant being the solar radiation intensity and the ambient temperature. In this paper an analysis of the motion of the sun influence will be presented, as the sun’s position throughout the year significantly affects the output of PV systems. Experimental analysis will be conducted on a small-scale PV system model within the Efficient and Sustainable Energy Research Platform (ENERED) research platform of the “Gheorghe Asachi” Technical University of Iasi, Romania, in order to evaluate the optimum PV module tilt angle for city of Iasi specific geographic coordinates.
{"title":"Experimental Evaluation of the Optimum Tilt Angle for Fixed Photovoltaic Modules","authors":"Oprea Roxana, I. Marcel, Machidon Dragos, B. Ravan","doi":"10.1109/ICEPE.2018.8559879","DOIUrl":"https://doi.org/10.1109/ICEPE.2018.8559879","url":null,"abstract":"Nowadays photovoltaic (PV) cells have a rather small conversion efficiency, generally under 20 percent for the commercial units. Further on, the amount of electricity produced by a photovoltaic system is deeply influenced by some external factors, the most significant being the solar radiation intensity and the ambient temperature. In this paper an analysis of the motion of the sun influence will be presented, as the sun’s position throughout the year significantly affects the output of PV systems. Experimental analysis will be conducted on a small-scale PV system model within the Efficient and Sustainable Energy Research Platform (ENERED) research platform of the “Gheorghe Asachi” Technical University of Iasi, Romania, in order to evaluate the optimum PV module tilt angle for city of Iasi specific geographic coordinates.","PeriodicalId":343896,"journal":{"name":"2018 International Conference and Exposition on Electrical And Power Engineering (EPE)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114543207","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}
Pub Date : 2018-10-01DOI: 10.1109/ICEPE.2018.8559743
Pompei-Cosmin Dărab
Nowadays the main focus of energy suppliers is the migration towards smart grid. This concern arise from the anticipated transition towards transport electrification and also the increasing number of distributed renewable energy sources to be integrated. This paper presents some strategies for handling the integration of electric vehicles and renewable sources into the power grid. Balancing the renewable energy sources is one of the topics presented. Another subject of the paper is presenting demand response control strategy. All presented solutions are designed to be integrated into a smart power grid.
{"title":"Strategies for Charging Electric Vehicles in Smart Grid","authors":"Pompei-Cosmin Dărab","doi":"10.1109/ICEPE.2018.8559743","DOIUrl":"https://doi.org/10.1109/ICEPE.2018.8559743","url":null,"abstract":"Nowadays the main focus of energy suppliers is the migration towards smart grid. This concern arise from the anticipated transition towards transport electrification and also the increasing number of distributed renewable energy sources to be integrated. This paper presents some strategies for handling the integration of electric vehicles and renewable sources into the power grid. Balancing the renewable energy sources is one of the topics presented. Another subject of the paper is presenting demand response control strategy. All presented solutions are designed to be integrated into a smart power grid.","PeriodicalId":343896,"journal":{"name":"2018 International Conference and Exposition on Electrical And Power Engineering (EPE)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114782821","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}
Pub Date : 2018-10-01DOI: 10.1109/ICEPE.2018.8559821
G. Ursan, Maria Ursan, A. D. L. Rosa, Iulian Cosmin Contofan
The paper presents aspects related to the simulation of electromagnetic properties in the case of the development of hot melt nanostructured adhesives, and the correlation of these simulations with the results of the preliminary tests performed.
本文介绍了热熔纳米结构胶粘剂开发过程中电磁特性模拟的相关方面，以及这些模拟与初步测试结果的相关性。
{"title":"Correlations Between Simulation and Electromagnetic Properties Testing of Hot Melt Nanostructured Adhesives","authors":"G. Ursan, Maria Ursan, A. D. L. Rosa, Iulian Cosmin Contofan","doi":"10.1109/ICEPE.2018.8559821","DOIUrl":"https://doi.org/10.1109/ICEPE.2018.8559821","url":null,"abstract":"The paper presents aspects related to the simulation of electromagnetic properties in the case of the development of hot melt nanostructured adhesives, and the correlation of these simulations with the results of the preliminary tests performed.","PeriodicalId":343896,"journal":{"name":"2018 International Conference and Exposition on Electrical And Power Engineering (EPE)","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115406710","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}
Pub Date : 2018-10-01DOI: 10.1109/ICEPE.2018.8559738
F. Munteanu, A. Ciobanu, C. Nemeş
The availability and the autonomy of local power systems supplied from renewable sources are the main subject of the paper. Due to pure random nature of solar and wind characteristics, the Bayes network methodology was selected to study the available generated power of given resources non-optimally located but near the load. The Bayes networks were generated from a large database. The corresponding information was recorded using a professional meteorological station while the Essential Graph Search was the algorithm to generate the final Bayes network structure and parameters. The network allows for weather estimation also. The final results were validated by meteorological experts.
{"title":"A Bayesian Approach of the Availability Complementarity of Renewable Resources","authors":"F. Munteanu, A. Ciobanu, C. Nemeş","doi":"10.1109/ICEPE.2018.8559738","DOIUrl":"https://doi.org/10.1109/ICEPE.2018.8559738","url":null,"abstract":"The availability and the autonomy of local power systems supplied from renewable sources are the main subject of the paper. Due to pure random nature of solar and wind characteristics, the Bayes network methodology was selected to study the available generated power of given resources non-optimally located but near the load. The Bayes networks were generated from a large database. The corresponding information was recorded using a professional meteorological station while the Essential Graph Search was the algorithm to generate the final Bayes network structure and parameters. The network allows for weather estimation also. The final results were validated by meteorological experts.","PeriodicalId":343896,"journal":{"name":"2018 International Conference and Exposition on Electrical And Power Engineering (EPE)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115426831","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}
Pub Date : 2018-10-01DOI: 10.1109/ICEPE.2018.8559766
I. Nasui-Zah, Andreea-Mǎdǎlina Nicorici, C. Martis
The present paper gives an overview on the influence of the saturation and cross-saturation on the machine parameters and on the evaluation of SynRM drives performances. A SynRM with optimized flux-barriers shapes and a Permanent Magnet (PM) assisted SynRM will be considered for analysis. A comprehensive analysis of the variation of d- and q-axis fluxes, as well as several modeling approaches are presented in order to evaluate the influence of saturation and cross-saturation on the behavior of the two machines.
{"title":"Saturation and cross-saturation in synchronous reluctance machines","authors":"I. Nasui-Zah, Andreea-Mǎdǎlina Nicorici, C. Martis","doi":"10.1109/ICEPE.2018.8559766","DOIUrl":"https://doi.org/10.1109/ICEPE.2018.8559766","url":null,"abstract":"The present paper gives an overview on the influence of the saturation and cross-saturation on the machine parameters and on the evaluation of SynRM drives performances. A SynRM with optimized flux-barriers shapes and a Permanent Magnet (PM) assisted SynRM will be considered for analysis. A comprehensive analysis of the variation of d- and q-axis fluxes, as well as several modeling approaches are presented in order to evaluate the influence of saturation and cross-saturation on the behavior of the two machines.","PeriodicalId":343896,"journal":{"name":"2018 International Conference and Exposition on Electrical And Power Engineering (EPE)","volume":"25 8-9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122120273","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}
Pub Date : 2018-10-01DOI: 10.1109/ICEPE.2018.8559928
M. Paulet, C. Lazarescu, A. Sălceanu
This paper aims to study the current density induced by a high voltage line in a homogeneous axis-symmetric model of the human body, the analysis being carried out via CST software. After a synthetic overview of the riddles of the currents induced by the electric and magnetic fields having mains frequency, there is presented a simplified human model crafted of 9 rotation bodies: a hemisphere, 4 cylinders and 4 trunks of cone. The resolutions and boundary conditions used to facilitate the calculation of finite-element currents implemented in CST software are then revealed. As reference and starting points, two extreme cases have been considered: just 220 kV voltage, without taking into account the influence of the current through the high voltage line, respectively a 900 A current, without regards to the intrinsic effects of the high voltage. For both cases, the obtained results are presented and commented with focus on the distribution of induced current on the body surface, along with the distribution of the induced currents on the vertical axis or on a horizontal axis. The acquired results have been compared with other determinations or simulations communicated in the literature. The advantages of these simulations are highlighted both from the perspective of the simultaneous study of the cumulative effect of these induced currents in certain parts of the human body as well as from the point of view of future studies on the influence which certain environmental factors (the nature of the soil, the sole of the footwear worn by the subject) can have on induced currents.
{"title":"Modeling the Currents Induced in the Human Body by an Overhead High Voltage Power Line","authors":"M. Paulet, C. Lazarescu, A. Sălceanu","doi":"10.1109/ICEPE.2018.8559928","DOIUrl":"https://doi.org/10.1109/ICEPE.2018.8559928","url":null,"abstract":"This paper aims to study the current density induced by a high voltage line in a homogeneous axis-symmetric model of the human body, the analysis being carried out via CST software. After a synthetic overview of the riddles of the currents induced by the electric and magnetic fields having mains frequency, there is presented a simplified human model crafted of 9 rotation bodies: a hemisphere, 4 cylinders and 4 trunks of cone. The resolutions and boundary conditions used to facilitate the calculation of finite-element currents implemented in CST software are then revealed. As reference and starting points, two extreme cases have been considered: just 220 kV voltage, without taking into account the influence of the current through the high voltage line, respectively a 900 A current, without regards to the intrinsic effects of the high voltage. For both cases, the obtained results are presented and commented with focus on the distribution of induced current on the body surface, along with the distribution of the induced currents on the vertical axis or on a horizontal axis. The acquired results have been compared with other determinations or simulations communicated in the literature. The advantages of these simulations are highlighted both from the perspective of the simultaneous study of the cumulative effect of these induced currents in certain parts of the human body as well as from the point of view of future studies on the influence which certain environmental factors (the nature of the soil, the sole of the footwear worn by the subject) can have on induced currents.","PeriodicalId":343896,"journal":{"name":"2018 International Conference and Exposition on Electrical And Power Engineering (EPE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120952994","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}
Pub Date : 2018-10-01DOI: 10.1109/ICEPE.2018.8559952
V. Ștefănescu, Tudorel Antohi, M. Poienar
The paper presents a solution for automatic reconfiguration in case of emergency of medium voltage power distribution network. With these automations, a significant reduction in the amount of time needed to reconfigure the emergency networks is achieved, ranging from a few hours or even dozens of hours in extreme climatic conditions to about 20 seconds.
{"title":"Automatic Reconfiguration of Medium Voltage Power Distribution Networks in Emergency Mode","authors":"V. Ștefănescu, Tudorel Antohi, M. Poienar","doi":"10.1109/ICEPE.2018.8559952","DOIUrl":"https://doi.org/10.1109/ICEPE.2018.8559952","url":null,"abstract":"The paper presents a solution for automatic reconfiguration in case of emergency of medium voltage power distribution network. With these automations, a significant reduction in the amount of time needed to reconfigure the emergency networks is achieved, ranging from a few hours or even dozens of hours in extreme climatic conditions to about 20 seconds.","PeriodicalId":343896,"journal":{"name":"2018 International Conference and Exposition on Electrical And Power Engineering (EPE)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121369601","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}
Pub Date : 2018-10-01DOI: 10.1109/icepe.2018.8559751
Daniel-Ştefan Georgescu, R. Pentiuc, Ilie Nițan, C. Ungureanu
The article refers to conceiving, designing, and experimenting a synchronous switch designed to power the primary of an electrical transformer to study no load and short-circuit regime.
本文构想、设计并试验了一种同步开关，用于为变压器一次供电，以研究变压器空载和短路情况。
{"title":"Contributions to conceiving, designing, and experimenting a device for connection phase adjustment (DRFC) to a limited displacement short mobile coil motor (MBMS)","authors":"Daniel-Ştefan Georgescu, R. Pentiuc, Ilie Nițan, C. Ungureanu","doi":"10.1109/icepe.2018.8559751","DOIUrl":"https://doi.org/10.1109/icepe.2018.8559751","url":null,"abstract":"The article refers to conceiving, designing, and experimenting a synchronous switch designed to power the primary of an electrical transformer to study no load and short-circuit regime.","PeriodicalId":343896,"journal":{"name":"2018 International Conference and Exposition on Electrical And Power Engineering (EPE)","volume":"323 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116533323","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}
Pub Date : 2018-10-01DOI: 10.1109/ICEPE.2018.8559935
João Monge, O. Postolache
The smart physical rehabilitation becomes a new reality and challenge regarding the technology adoption by the users and high costs. In this context, the paper presents a smart physical rehabilitation system that combines augmented reality serious games and wearable sensor network to improve the patient engagement during physical rehabilitation. The implemented system provides also health status assessment acquiring vital data to be analyzed by clinical professionals. The wearable sensing is based on the Simblee platform that captures kinematic and dynamic quantities associated with lower limb motion using an IMU as so as the muscular activation and cardiac activity. The Healthcare IoT compatibility is assured by an augmented reality platform based on iOS smart phone that communicates with wearable wireless sensor network and after primary processing of the data it uploads the analyzed in an AWS cloud based web platform.
{"title":"Augmented Reality and Smart Sensors for Physical Rehabilitation","authors":"João Monge, O. Postolache","doi":"10.1109/ICEPE.2018.8559935","DOIUrl":"https://doi.org/10.1109/ICEPE.2018.8559935","url":null,"abstract":"The smart physical rehabilitation becomes a new reality and challenge regarding the technology adoption by the users and high costs. In this context, the paper presents a smart physical rehabilitation system that combines augmented reality serious games and wearable sensor network to improve the patient engagement during physical rehabilitation. The implemented system provides also health status assessment acquiring vital data to be analyzed by clinical professionals. The wearable sensing is based on the Simblee platform that captures kinematic and dynamic quantities associated with lower limb motion using an IMU as so as the muscular activation and cardiac activity. The Healthcare IoT compatibility is assured by an augmented reality platform based on iOS smart phone that communicates with wearable wireless sensor network and after primary processing of the data it uploads the analyzed in an AWS cloud based web platform.","PeriodicalId":343896,"journal":{"name":"2018 International Conference and Exposition on Electrical And Power Engineering (EPE)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126094200","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}
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