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Special Issue "Selected Papers from the 2014 International Symposium on Computer, Consumer and Control (IS3C2014)"

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A special issue of Energies (ISSN 1996-1073).

Deadline for manuscript submissions: closed (15 March 2014)

Special Issue Editor

Guest Editor
Prof. Dr. Hsiung-Cheng Lin (Website)

Department of Electronic Engineering, National Chin-Yi University of Technology
Interests: microprocessor applications; practical applications of control system; network supervised control; graphical interface control; power harmonics tracking and analysis; neural network and applications

Special Issue Information

Submission

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. Papers will be published continuously (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are refereed through a peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed Open Access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1400 CHF (Swiss Francs).

Published Papers (4 papers)

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Research

Open AccessArticle Silicon Heterojunction Solar Cells Using AlOx and Plasma-Immersion Ion Implantation
Energies 2014, 7(6), 3653-3663; doi:10.3390/en7063653
Received: 13 March 2014 / Revised: 20 May 2014 / Accepted: 5 June 2014 / Published: 13 June 2014
PDF Full-text (858 KB) | HTML Full-text | XML Full-text
Abstract
Aluminum oxide (AlOx) and plasma immersion ion implantation (PIII) were studied in relation to passivated silicon heterojunction solar cells. When aluminum oxide (AlOx) was deposited on the surface of a wafer; the electric field near the surface of [...] Read more.
Aluminum oxide (AlOx) and plasma immersion ion implantation (PIII) were studied in relation to passivated silicon heterojunction solar cells. When aluminum oxide (AlOx) was deposited on the surface of a wafer; the electric field near the surface of wafer was enhanced; and the mobility of the carrier was improved; thus reducing carrier traps associated with dangling bonds. Using PIII enabled implanting nitrogen into the device to reduce dangling bonds and achieve the desired passivation effect. Depositing AlOx on the surface of a solar cell increased the short-circuit current density (Jsc); open-circuit voltage (Voc); and conversion efficiency from 27.84 mA/cm2; 0.52 V; and 8.97% to 29.34 mA/cm2; 0.54 V; and 9.68%; respectively. After controlling the depth and concentration of nitrogen by modulating the PIII energy; the ideal PIII condition was determined to be 2 keV and 10 min. As a result; a 15.42% conversion efficiency was thus achieved; and the Jsc; Voc; and fill factor were 37.78 mA/cm2; 0.55 V; and 0.742; respectively. Full article
Open AccessArticle Hierarchical Communication Network Architectures for Offshore Wind Power Farms
Energies 2014, 7(5), 3420-3437; doi:10.3390/en7053420
Received: 14 March 2014 / Revised: 21 April 2014 / Accepted: 14 May 2014 / Published: 22 May 2014
Cited by 8 | PDF Full-text (1186 KB) | HTML Full-text | XML Full-text
Abstract
Nowadays, large-scale wind power farms (WPFs) bring new challenges for both electric systems and communication networks. Communication networks are an essential part of WPFs because they provide real-time control and monitoring of wind turbines from a remote location (local control center). However, [...] Read more.
Nowadays, large-scale wind power farms (WPFs) bring new challenges for both electric systems and communication networks. Communication networks are an essential part of WPFs because they provide real-time control and monitoring of wind turbines from a remote location (local control center). However, different wind turbine applications have different requirements in terms of data volume, latency, bandwidth, QoS, etc. This paper proposes a hierarchical communication network architecture that consist of a turbine area network (TAN), farm area network (FAN), and control area network (CAN) for offshore WPFs. The two types of offshore WPFs studied are small-scale WPFs close to the grid and medium-scale WPFs far from the grid. The wind turbines are modelled based on the logical nodes (LN) concepts of the IEC 61400-25 standard. To keep pace with current developments in wind turbine technology, the network design takes into account the extension of the LNs for both the wind turbine foundation and meteorological measurements. The proposed hierarchical communication network is based on Switched Ethernet. Servers at the control center are used to store and process the data received from the WPF. The network architecture is modelled and evaluated via OPNET. We investigated the end-to-end (ETE) delay for different WPF applications. The results are validated by comparing the amount of generated sensing data with that of received traffic at servers. The network performance is evaluated, analyzed and discussed in view of end-to-end (ETE) delay for different link bandwidths. Full article
Figures

Open AccessArticle Fast Estimation of State of Charge for Lithium-Ion Batteries
Energies 2014, 7(5), 3438-3452; doi:10.3390/en7053438
Received: 14 March 2014 / Revised: 12 May 2014 / Accepted: 19 May 2014 / Published: 22 May 2014
Cited by 2 | PDF Full-text (827 KB) | HTML Full-text | XML Full-text
Abstract
This paper presents a novel impedance-based approach to efficiently estimate the state of charge (SOC) of a Li-ion battery. By using an AC impedance analyzer, a database is constructed, containing records of AC impedance versus SOC. In practical applications, the SOC values [...] Read more.
This paper presents a novel impedance-based approach to efficiently estimate the state of charge (SOC) of a Li-ion battery. By using an AC impedance analyzer, a database is constructed, containing records of AC impedance versus SOC. In practical applications, the SOC values can be found instantly once the contents of the database are referenced. For validation purposes, AC impedance comparisons are conducted using AC impedance analyzer as a benchmark at SOC of 0%, 50% and 100%, which indicate errors of 8.636%, 2.604% and 0.600%, respectively. Full article
Open AccessArticle Design and Evaluation of a Photovoltaic/Thermal-Assisted Heat Pump Water Heating System
Energies 2014, 7(5), 3319-3338; doi:10.3390/en7053319
Received: 13 March 2014 / Revised: 6 May 2014 / Accepted: 12 May 2014 / Published: 20 May 2014
Cited by 5 | PDF Full-text (1087 KB) | HTML Full-text | XML Full-text
Abstract
This paper presents the design, modelling and performance evaluation of a photovoltaic/thermal-assisted heat pump water heating (PVTA-HPWH) system. The cooling effect of a refrigerant simultaneously enhances the PVT efficiency and effectively improves the coefficient of performance (COP) of the HPWH system. The [...] Read more.
This paper presents the design, modelling and performance evaluation of a photovoltaic/thermal-assisted heat pump water heating (PVTA-HPWH) system. The cooling effect of a refrigerant simultaneously enhances the PVT efficiency and effectively improves the coefficient of performance (COP) of the HPWH system. The proposed model was built in the MATLAB/Simulink environment by considering the reciprocal energy exchange between a PVT evaporator and a HPWH system. In addition, the power consumption needs of the HPWH are provided by the PV electricity using a model-based control methodology. System performance is evaluated through a real field test. The results have demonstrated the power autarchy of the proposed PVTA-HPWH system with better PVT efficiency and COP. In addition, the good agreement between the model simulation and the experimental measurements demonstrate the proposed model with sufficient confidence. Full article

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