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Model for Predicting DC Flashover Voltage of Pre-Contaminated and Ice-Covered Long Insulator Strings under Low Air Pressure

Hu, Jianlin; Sun, Caixin; Jiang, Xingliang; Yang, Qing; … - In: Energies 4 (2011) 4, pp. 628-643

In the current study, a multi-arc predicting model for DC critical flashover voltage of iced and pre-contaminated long … ice layer under DC multi-arc condition is established. To validate the model, 7-unit and 15-unit insulator strings were … tested in a multi-function artificial climate chamber under the coexistent conditions of low air pressure, pollution, and …

Persistent link: https://www.econbiz.de/10010668180

Using Atmospheric Pressure Tendency to Optimise Battery Charging in Off-Grid Hybrid Wind-Diesel Systems for Telecoms

Phelan, Shane; Meehan, Paula; Daniels, Stephen - In: Energies 6 (2013) 6, pp. 3052-3071

Off grid telecom base stations in developing nations are powered by diesel generators. They are typically oversized and run at a fraction of their rated load for most of their operating lifetime. Running generators at partial load is inefficient and, over time, physically damages the engine. A...

Persistent link: https://www.econbiz.de/10010674371

Circuit Simulation for Solar Power Maximum Power Point Tracking with Different Buck-Boost Converter Topologies

Shiau, Jaw-Kuen; Lee, Min-Yi; Wei, Yu-Chen; Chen, Bo-Chih - In: Energies 7 (2014) 8, pp. 5027-5046

involves using different buck-boost power converter topologies; including SEPIC, Zeta, and four-switch type buck-boost DC/DC …

Persistent link: https://www.econbiz.de/10010884951

Geophysical Methods for Monitoring Temperature Changes in Shallow Low Enthalpy Geothermal Systems

Hermans, Thomas; Nguyen, Frédéric; Robert, Tanguy; … - In: Energies 7 (2014) 8, pp. 5083-5118

Low enthalpy geothermal systems exploited with ground source heat pumps or groundwater heat pumps present many advantages within the context of sustainable energy use. Designing, monitoring and controlling such systems requires the measurement of spatially distributed temperature fields and the...

Persistent link: https://www.econbiz.de/10010885348

Shadow Replication: An Energy-Aware, Fault-Tolerant Computational Model for Green Cloud Computing

Cui, Xiaolong; Mills, Bryan; Znati, Taieb; Melhem, Rami - In: Energies 7 (2014) 8, pp. 5151-5176

As the demand for cloud computing continues to increase, cloud service providers face the daunting challenge to meet the negotiated SLA agreement, in terms of reliability and timely performance, while achieving cost-effectiveness. This challenge is increasingly compounded by the increasing...

Persistent link: https://www.econbiz.de/10010886252

Comparison Between Wind Power Prediction Models Based on Wavelet Decomposition with Least-Squares Support Vector Machine (LS-SVM) and Artificial Neural Network (ANN)

Giorgi, Maria Grazia De; Campilongo, Stefano; … - In: Energies 7 (2014) 8, pp. 5251-5272

A high penetration of wind energy into the electricity market requires a parallel development of efficient wind power forecasting models. Different hybrid forecasting methods were applied to wind power prediction, using historical data and numerical weather predictions (NWP). A comparative study...

Persistent link: https://www.econbiz.de/10010886253

Dialectic Form Finding of Passive and Adaptive Shading Enclosures

Adriaenssens, Sigrid; Rhode-Barbarigos, Landolf; … - In: Energies 7 (2014) 8, pp. 5201-5220

Form finding describes the process of finding a stable equilibrium shape for a system under a specific set of loads, for a set of boundary conditions and starting from an arbitrary initial geometry. However, form finding does not traditionally involve performance constraints such as...

Persistent link: https://www.econbiz.de/10010886254

Finite Element Method Modeling of Sensible Heat Thermal Energy Storage with Innovative Concretes and Comparative Analysis with Literature Benchmarks

Ferone, Claudio; Colangelo, Francesco; Frattini, Domenico; … - In: Energies 7 (2014) 8, pp. 5291-5316

Efficient systems for high performance buildings are required to improve the integration of renewable energy sources and to reduce primary energy consumption from fossil fuels. This paper is focused on sensible heat thermal energy storage (SHTES) systems using solid media and numerical...

Persistent link: https://www.econbiz.de/10010887128

Modeling and Analysis of Transport Processes and Efficiency of Combined SOFC and PEMFC Systems

Rabbani, Abid; Rokni, Masoud - In: Energies 7 (2014) 9, pp. 5502-5522

A hybrid fuel cell system (~10 kWe) for an average family house including heating is proposed. The investigated system comprises a Solid Oxide Fuel Cell (SOFC) on top of a Polymer Electrolyte Fuel Cell (PEFC). Hydrogen produced from the off-gases of the SOFC can be fed directly to the PEFC....

Persistent link: https://www.econbiz.de/10010890186

Capacity Calculation of Shunt Active Power Filters for Electric Vehicle Charging Stations Based on Harmonic Parameter Estimation and Analytical Modeling

Zhou, Niancheng; Wang, Jiajia; Wang, Qianggang; Wei, … - In: Energies 7 (2014) 8, pp. 5425-5443

The influence of electric vehicle charging stations on power grid harmonics is becoming increasingly significant as their presence continues to grow. This paper studies the operational principles of the charging current in the continuous and discontinuous modes for a three-phase uncontrolled...

Persistent link: https://www.econbiz.de/10010890187

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