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A Zero Input Current Ripple ZVS/ZCS Boost Converter with Boundary-Mode Control

Lai, Ching-Ming; Yang, Ming-Ji; Liang, Shih-Kun - In: Energies 7 (2014) 10, pp. 6765-6782

In this paper, in order to achieve zero ripple conditions, the use of a ripple mirror (RM) circuit for the boost converter is proposed. The operation modes are studied and steady-state analyses performed to show the merits of the proposed converter. It is found that the proposed RM circuit...

Persistent link: https://www.econbiz.de/10010945721

Implications of Stably Stratified Atmospheric Boundary Layer Turbulence on the Near-Wake Structure of Wind Turbines

Bhaganagar, Kiran; Debnath, Mithu - In: Energies 7 (2014) 9, pp. 5740-5763

Turbulence structure in the wake behind a full-scale horizontal-axis wind turbine under the influence of real-time atmospheric inflow conditions has been investigated using actuator-line-model based large-eddy-simulations. Precursor atmospheric boundary layer (ABL) simulations have been...

Persistent link: https://www.econbiz.de/10010945722

Evaluation of Mechanically and Adhesively Fixed External Insulation Systems Using Vacuum Insulation Panels for High-Rise Apartment Buildings

Park, Sihyun; Choi, Bo-Hye; Lim, Jae-Han; Song, Seung-Yeong - In: Energies 7 (2014) 9, pp. 5764-5786

Buildings account for a significant portion of a nation’s total energy consumption. To meet the global demand for … greater energy efficiency, many countries are drastically strengthening insulation regulations for buildings. Thus …

Persistent link: https://www.econbiz.de/10010945723

Multi-Objective Planning of Multi-Type Distributed Generation Considering Timing Characteristics and Environmental Benefits

Gao, Yajing; Liu, Jianpeng; Yang, Jin; Liang, Haifeng; … - In: Energies 7 (2014) 10, pp. 6242-6257

This paper presents a novel approach to multi-type distributed generation (DG) planning based on the analysis of investment and income brought by grid-connected DG. Firstly, the timing characteristics of loads and DG outputs, as well as the environmental benefits of DG are analyzed. Then, on the...

Persistent link: https://www.econbiz.de/10010945724

Comparative Study of Two Daylighting Analysis Methods with Regard to Window Orientation and Interior Wall Reflectance

Yoon, Yeo Beom; Manandhar, Rashmi; Lee, Kwang Ho - In: Energies 7 (2014) 9, pp. 5825-5846

The accuracy and speed of the daylighting analysis developed for use in EnergyPlus is better than its predecessors. In EnergyPlus, the detailed method uses the Split-flux algorithm whereas the DElight method uses the Radiosity algorithm. Many existing studies have addressed the two methods,...

Persistent link: https://www.econbiz.de/10010945725

Induced Voltages Ratio-Based Algorithm for Fault Detection, and Faulted Phase and Winding Identification of a Three-Winding Power Transformer

Lee, Byung Eun; Park, Jung-Wook; Crossley, Peter A.; … - In: Energies 7 (2014) 9, pp. 6031-6049

This paper proposes an algorithm for fault detection, faulted phase and winding identification of a three-winding power transformer based on the induced voltages in the electrical power system. The ratio of the induced voltages of the primary-secondary, primary-tertiary and secondary-tertiary...

Persistent link: https://www.econbiz.de/10010945726

Lorenz Wind Disturbance Model Based on Grey Generated Components

Zhang, Yagang; Yang, Jingyun; Wang, Kangcheng; Wang, Yinding - In: Energies 7 (2014) 11, pp. 7178-7193

In order to meet the needs of wind speed prediction in wind farms, we consider the influence of random atmospheric disturbances on wind variations. Considering a simplified fluid convection mode, a Lorenz system can be employed as an atmospheric disturbance model. Here Lorenz disturbance is...

Persistent link: https://www.econbiz.de/10010945727

Multiagent-Based Distributed Load Shedding for Islanded Microgrids

Wu, Xi; Jiang, Ping; Lu, Jing - In: Energies 7 (2014) 9, pp. 6050-6062

This paper addresses a multiagent-based distributed load shedding scheme to restore frequency for the microgrids during islanded operation. The objective of the proposed scheme is to realize a distributed load shedding considering its associated cost and the capacity of the flexible loads. There...

Persistent link: https://www.econbiz.de/10010945728

Naturally-Forced Slug Flow Expander for Application in a Waste-Heat Recovery Cycle

Witt, Ben de; Hugo, Ron - In: Energies 7 (2014) 11, pp. 7223-7244

This paper investigates a slug-flow expander (SFE) for conversion of high-pressure gas/vapor into kinetic energy of … liquid slugs. The energy transfer from high-pressure to kinetic energy is quantified using thrust plate measurements. Non … waste-heat recovery system) or air with water droplet formation (as part of a compressed-air energy storage system) could be …

Persistent link: https://www.econbiz.de/10010960242

Macroalgae-Derived Biofuel: A Review of Methods of Energy Extraction from Seaweed Biomass

Milledge, John J.; Smith, Benjamin; Dyer, Philip W.; … - In: Energies 7 (2014) 11, pp. 7194-7222

useful energy may be extracted from macroalgae biomass including: direct combustion, pyrolysis, gasification, trans …

Persistent link: https://www.econbiz.de/10010960243