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You searched for: Journal name Applied energy Remove constraint Journal name: Applied energy Subject energy Remove constraint Subject: energy Subject term aerodynamics Remove constraint Subject term: aerodynamics
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1. Experimental evaluation of a tree-shaped quad-rotor wind turbine on power output controllability and survival shutdown capability

Author:
Yichen Jiang; Shijie Liu; Peidong Zao; Yanwei Yu; Li Zou; Liqin Liu; Jiawen Li
Source:
Applied energy 2022 v.309 pp. 118350
ISSN:
0306-2619
Subject:
aerodynamics; batteries; energy; wind direction; wind speed; wind tunnels; wind turbines
Abstract:
... Vertical-axis wind turbines are considered to be a better choice for cities and isolated semi-urban areas. However, it is difficult to control their power outputs, especially at high wind speeds, which can potentially cause damage to the generator or the wind turbine structures. In this study, a tree-shaped quad-rotor wind turbine with an active yaw system was proposed to not only effectively cont ...
DOI:
10.1016/j.apenergy.2021.118350

2. Data-driven reconstruction of interpretable model for air supply system of proton exchange membrane fuel cell

Author:
Zhihua Deng; Qihong Chen; Liyan Zhang; Keliang Zhou; Yi Zong; Zhichao Fu; Hao Liu
Source:
Applied energy 2021 v.299 pp. 117266
ISSN:
0306-2619
Subject:
aerodynamics; air; data collection; energy; fuel cells; hydrogen; management systems; simulation models
Abstract:
... Appropriate air supply system controller is of great significance to improve the performance of proton exchange membrane fuel cell. Most of controllers rely on the high-precision, simple, and interpretable model. It is particularly important to establish the model for the fuel cell air supply system. Since the high-precision physically interpretable control-oriented model can provide an understand ...
DOI:
10.1016/j.apenergy.2021.117266

3. All-electric commercial aviation with solid oxide fuel cell-gas turbine-battery hybrids

Author:
Jeffrey M. Collins; Dustin McLarty
Source:
Applied energy 2020 v.265 pp. 114787
ISSN:
0306-2619
Subject:
aerodynamics; air transportation; aircraft; aviation; batteries; electric power; energy; flight; fuel cells; greenhouse gas emissions; hydrogen fuels; turbines
Abstract:
... All-electric aircraft have the potential to eliminate greenhouse gas emissions produced by air travel, but the energy storage density of batteries, 0.35 kWh∙kg⁻¹, severely limits payload and range. This study introduces a fuel cell-gas turbine hybrid arrangement that utilizes liquid hydrogen fuel and superconducting motors to achieve energy storage densities in excess of 7 kWh∙kg⁻¹, more than 20× ...
DOI:
10.1016/j.apenergy.2020.114787

4. Modeling building resilience against extreme weather by integrated CityFFD and CityBEM simulations

Author:
Ali Katal; Mohammad Mortezazadeh; Liangzhu (Leon) Wang
Source:
Applied energy 2019 v.250 pp. 1402-1417
ISSN:
0306-2619
Subject:
aerodynamics; buildings; case studies; climate change; dynamic models; energy; greenhouse gas emissions; heat transfer; issues and policy; microclimate; storms; urban areas; urbanization; Canada
Abstract:
... In the past decade, urban building energy models have been developed to address the increasing concerns over energy consumption and greenhouse gas emission due to rapid urbanization and building resilience as a result of climate change. These models can estimate energy consumption, GHG emission and resilience response of buildings in an urban area, and evaluate retrofit strategies for architects, ...
DOI:
10.1016/j.apenergy.2019.04.192

5. The Coriolis force and the direction of rotation of the blades significantly affect the wake of wind turbines

Author:
Reza Nouri; Ahmad Vasel-Be-Hagh; Cristina L. Archer
Source:
Applied energy 2020 v.277 pp. 115511
ISSN:
0306-2619
Subject:
aerodynamics; energy; power generation; wind direction; wind farms; wind turbines; yaws
Abstract:
... The aerodynamic interactions of wind turbines within a wind farm cause major energy losses. Yaw control is a promising active strategy to tackle this issue in real time during the operation of the plant. The wake of a wind turbine can be steered away from its downstream counterparts by imposing a yaw angle to its rotor. Studying the impact of intentional yaw misalignment on the performance of wind ...
DOI:
10.1016/j.apenergy.2020.115511

6. Wake and power fluctuations of a model wind turbine subjected to pitch and roll oscillations

Author:
Shifeng Fu; Yaqing Jin; Yuan Zheng; Leonardo P. Chamorro
Source:
Applied energy 2019 v.253 pp. 113605
ISSN:
0306-2619
Subject:
aerodynamics; blades; energy; momentum; particle image velocimetry; rolling; wind power; wind tunnels; wind turbines
Abstract:
... Wind-tunnel experiments were performed to inspect the impact of a variety of pitch and roll oscillations of a model wind turbine on the instantaneous power output and wake. Particle image velocimetry and hotwire anemometry were used to characterize the flow in the wake; instantaneous power output was also obtained in each of the configurations. For comparison, measurements were also performed in a ...
DOI:
10.1016/j.apenergy.2019.113605

7. A boundary layer scaling technique for estimating near-surface wind energy using numerical weather prediction and wind map data

Author:
D.J. Allen; A.S. Tomlin; C.S.E. Bale; A. Skea; S. Vosper; M.L. Gallani
Source:
Applied energy 2017 v.208 pp. 1246-1257
ISSN:
0306-2619
Subject:
Weibull statistics; aerodynamics; case studies; data collection; energy; meteorological data; models; prediction; weather forecasting; wind power; wind speed; wind turbines; Great Britain
Abstract:
... A boundary layer scaling (BLS) method for predicting long-term average near-surface wind speeds and power densities was developed in this work. The method was based on the scaling of reference climatological data either from long-term average wind maps or from hourly wind speeds obtained from high-resolution Numerical Weather Prediction (NWP) models, with case study applications from Great Britain ...
DOI:
10.1016/j.apenergy.2017.09.029

8. An empirical–heuristic optimization of the building-roof geometry for urban wind energy exploitation on high-rise buildings

Author:
Francisco Toja-Silva; Oscar Lopez-Garcia; Carlos Peralta; Jorge Navarro; Ignacio Cruz
Source:
Applied energy 2016 v.164 pp. 769-794
ISSN:
0306-2619
Subject:
aerodynamics; buildings; cities; energy; geometry; turbulent flow; urban areas; wind; wind power; wind turbines
Abstract:
... Urban wind energy exploitation is an important topic for smart sustainable cities. The present investigation is a step in this direction, considering the latest advances in building aerodynamics, identifying and analyzing the optimum building-roof shape for the urban wind energy exploitation. This investigation focusses in two aspects: the isolated building shape optimization and the analysis of t ...
DOI:
10.1016/j.apenergy.2015.11.095