Journal of Renewable and Sustainable Energy

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Statistical analysis of kinetic energy entrainment in a model wind turbine array boundary layer
Journal of Renewable and Sustainable Energy - Tập 4 Số 6 - 2012
Nicholas Hamilton, Hyung Suk Kang, Charles Meneveau, Raúl Bayoán Cal
For large wind farms, kinetic energy must be entrained from the flow above the wind turbines to replenish wakes and enable power extraction in the array. Various statistical features of turbulence causing vertical entrainment of mean-flow kinetic energy are studied using hot-wire velocimetry data taken in a model wind farm in a scaled wind tunnel experiment. Conditional statistics and spec...... hiện toàn bộ
Experimental study of the horizontally averaged flow structure in a model wind-turbine array boundary layer
Journal of Renewable and Sustainable Energy - Tập 2 Số 1 - 2010
Raúl Bayoán Cal, José Lebrón, Luciano Castillo, Hyung Suk Kang, Charles Meneveau
When wind turbines are deployed in large arrays, their ability to extract kinetic energy from the flow decreases due to complex interactions among them, the terrain topography and the atmospheric boundary layer. In order to improve the understanding of the vertical transport of momentum and kinetic energy across a boundary layer flow with wind turbines, a wind-tunnel experiment is performe...... hiện toàn bộ
Numerical analysis of the effect of vortex generator on inboard region of wind turbine blade
Journal of Renewable and Sustainable Energy - Tập 13 Số 6 - 2021
Heejeon Im, Seongkeon Kim, Bumsuk Kim
The blade design of a horizontal axis wind turbine (HAWT) prioritizes structural stability over aerodynamic performance, which results in power loss caused by stalling in the inboard regions. In this study, a vortex generator (VG) was employed for stall control. Because the generated vortex intensity varies with the VG geometry and size, design values based on the aerodynamic characteristi...... hiện toàn bộ
Study of carbon dioxide emissions prediction in Hebei province, China using a BPNN based on GA
Journal of Renewable and Sustainable Energy - Tập 8 Số 4 - 2016
Wei Sun, Minquan Ye, Yanfeng Xu
With the deterioration of the global greenhouse effect, the study of carbon dioxide emissions has received more and more international attention and accurate prediction of carbon dioxide emissions is also important for the formulation of reasonable energy-saving emission reduction measures. In this paper, the genetic algorithm is used to optimize the initial connection weights and threshol...... hiện toàn bộ
Numerical investigation of Savonius wind turbine farms
Journal of Renewable and Sustainable Energy - Tập 8 Số 5 - 2016
Belkacem Belabes, Abdelkader Youcefi, Marius Paraschivoiu
The Savonius vertical axis wind turbine is a simple device, easy to manufacture, has good starting characteristics, and rotates with wind from any direction; nevertheless, it has a lower efficiency than the other wind turbines. The aim of this paper is to numerically explore the non-linear unsteady flow over a conventional Savonius using three dimensional computations with emphasis on the ...... hiện toàn bộ
Numerical study on coupling effects among multiple Savonius turbines
Journal of Renewable and Sustainable Energy - Tập 4 Số 5 - 2012
Xiaojing Sun, Daihai Luo, Diangui Huang, Guoqing Wu
A Savonius rotor can be used as a wind or water current energy conversion device that produces electricity. In spite of their simple structure and assembly, Savonius turbines have less commercial appeal than other types of turbines due to their relatively low energy conversion efficiency. In order to increase the output power of a Savonius turbine, most studies have only focused on optimiz...... hiện toàn bộ
Nanofluid-based direct absorption solar collector
Journal of Renewable and Sustainable Energy - Tập 2 Số 3 - 2010
Todd Otanicar, Patrick E. Phelan, Ravi Prasher, Gary Rosengarten, Robert A. Taylor
Solar energy is one of the best sources of renewable energy with minimal environmental impact. Direct absorption solar collectors have been proposed for a variety of applications such as water heating; however the efficiency of these collectors is limited by the absorption properties of the working fluid, which is very poor for typical fluids used in solar collectors. It has been shown tha...... hiện toàn bộ
Multilevel home energy management integrated with renewable energies and storage technologies considering contingency operation
Journal of Renewable and Sustainable Energy - Tập 11 Số 2 - 2019
Hasan Mehrjerdi
This paper presents a multilevel energy management system between homes and the electrical grid. The proposed model includes three levels: the first level is made of the utility grid, and it can send or receive energy from the second level. The second level is formed as a common level that is equipped with a wind turbine, battery energy storage, and a diesel generator. The second level can...... hiện toàn bộ
Implementation of a generalized actuator line model for wind turbine parameterization in the Weather Research and Forecasting model
Journal of Renewable and Sustainable Energy - Tập 9 Số 6 - 2017
Nikola Marjanovic, Jeffrey D. Mirocha, Branko Kosović, Julie K. Lundquist, Fotini Katopodes Chow
A generalized actuator line (GAL) wind turbine parameterization is implemented within the Weather Research and Forecasting model to enable high-fidelity large-eddy simulations of wind turbine interactions with boundary layer flows under realistic atmospheric forcing conditions. Numerical simulations using the GAL parameterization are evaluated against both an already implemented generalize...... hiện toàn bộ
Optimization of power generation from a set of low-temperature abandoned gas wells, using organic Rankine cycle
Journal of Renewable and Sustainable Energy - Tập 4 Số 6 - 2012
Mahyar Ebrahimi, Seyed Ebrahim Moussavi Torshizi
This research article deals with the employment of organic Rankine cycle (ORC) to generate electricity from a set of low-temperature abandoned gas wells in Iran. At first, a thermodynamic analysis was performed to select an appropriate power cycle; consequently organic Rankine cycle was chosen. Then, a comprehensive investigation was carried out to find a typical low-temperature abandoned ...... hiện toàn bộ
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