scholarly journals Preparing an incompressible-flow fluid dynamics code for exascale-class wind energy simulations

2021 ◽  
Author(s):  
Paul Mullowney ◽  
Ruipeng Li ◽  
Stephen Thomas ◽  
Shreyas Ananthan ◽  
Ashesh Sharma ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Wind Energy ◽  
Incompressible Flow ◽  
Energy Simulations

Comparison of and Discrepancies Between TMY and TMY2S Predictions for Simple Photovoltaic and Wind Energy Simulations

2000 ◽  
Vol 123 (1) ◽  
pp. 6-9 ◽  
Author(s):  
Darrell D. Massie ◽  
Jan F. Kreider
Keyword(s):  
Wind Energy ◽  
Lower Energy ◽  
Energy System ◽  
The United States ◽  
Clearness Index ◽  
Data Set ◽  
Climatic Regions ◽  
Radiation Data ◽  
Wind Energy System ◽  
Energy Simulations

A new typical meteorological year (TMY2s) data set has been derived from the 1961–1990 National Solar Radiation Data Base (NSRDB). This paper compares PV and wind energy system simulation results using new TMY2s data with results using the original TMY data set. PV and aerogenerator simulations are compared in seven different climatic regions of the United States. Results indicate that PV simulations using TMY2s data provide higher energy values for cloudy regions where the clearness index is low and lower energy values for sunnier climates. TMY2s wind simulations produce lower energy predictions in nearly all cases tested.

scholarly journals Computational Fluid Dynamics Analysis of Wind Lens

2021 ◽  
Vol 9 (VIII) ◽  
pp. 381-394
Author(s):  
Ms. Sonali Mangesh Patil
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Wind Energy ◽  
Energy Recovery ◽  
Energy Crisis ◽  
Dynamics Analysis ◽  
Renewable Sources ◽  
Wind Turbine Noise ◽  
Computational Fluid Dynamics Analysis ◽  
Ecological Hazards

The wind-lens turbine consist of shrouded diffuser which increases the wind speed at rotor, developing electric power even in low speed wind. Energy crisis is one of the major problems facing the countries globally. One of the methods to overcome energy trouble is to use the energy available efficiently and also to reduce the energy that is being wasted. The fact that non-renewable sources of energy become cause of pollution and the increased ecological hazards and their rate of depletion has required to use of nonconventional and renewable sources. Therefore to adopt the methods of energy recovery is required. Energy recovery is a technique used to reduce the vitality input to an overall system by exchanging the energy from one system of an overall system to another. Wind lens turbine is the next generation small wind which can be installed anywhere. It has significant reduction in wind turbine noise, concentration of wind energy, compact and highly efficient, adaptable to the surroundings, highly safe systems and significant reduction in birds strike.

Modeling of an Integrated Wind Energy Building

2007 ◽  
Author(s):  
William E. Pedersen ◽  
Daniel N. Pope
Keyword(s):  
Fluid Dynamics ◽  
Numerical Modeling ◽  
Wind Energy ◽  
Three Dimensional ◽  
Building Structure ◽  
Two Dimensional ◽  
Free Standing ◽  
Pressure Area ◽  
Computational Fluid Dynamics Cfd ◽  
Geographic Regions

This study presents the design and modeling of an integrated wind energy building. It is proposed that a building be constructed with an integral wind turbine that takes advantage of the funneling of wind from the building structure and the low pressure area above or leeward of the building. Computational Fluid Dynamics (CFD) was used to evaluate different building geometries and wind potentials. Preliminary investigations using two dimensional numerical modeling in both the horizontal and vertical planes are presented. Three dimensional analyses are also presented of promising geometries from the two dimensional preliminary results. While additional modeling efforts will be necessary to optimize this system, results indicate a significant improvement in performance over free standing turbines, allowing for utilization of wind power in geographic regions that have traditionally not been feasible.

A literature review of building energy simulation and computational fluid dynamics co-simulation strategies and its implications on the accuracy of energy predictions

2021 ◽  
pp. 014362442110204
Author(s):  
Manan Singh ◽  
Ryan Sharston
Keyword(s):  
Heat Transfer ◽  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Practical Implication ◽  
Convective Heat Transfer Coefficient ◽  
Building Energy ◽  
Coupled Analysis ◽  
Future Research ◽  
Building Performance ◽  
Energy Simulations

The paper presents a review of existing literature in the field of coupling Computational Fluid Dynamics (CFD) with Building Energy Simulations (BES) to better predict indoor environmental conditions and building energy implications. CFD is capable of providing a detailed analysis of airflow profile and temperature gradients in the space as well as better prediction of heat transfer involving convection and radiation. Whereas BES can provide dynamically changing boundary conditions to CFD to facilitate a precise transient analysis. Combining the two simulations provides a powerful framework to accurately predict building performance parameters. The review examines the variables exchanged between the two simulations and establishes that the Convective Heat Transfer Coefficient (CHTC) as the most important exchanged variable that can significantly improve the accuracy of energy simulations. Issues regarding the application of co-simulation mechanism are then discussed in terms of simulation discontinuities, along with strategies adopted by researchers to overcome the same. In the later sections, the review evaluates the applicability of co-simulation from the perspective of year-long building energy simulations and presents an overview of methods used in research to implement the same. Finally, the conclusions are discussed and the scope for future research in the field is presented. Practical implication: The review presents a critical analysis of essentially all major coupling strategies that can be used to perform a BES-CFD coupled analysis along with their strengths, limitations and possible application scenarios. Additionally, the problems associated with establishing the co-simulation are examined and various adopted solutions are presented along with methods implemented towards extending the practical applicability of such an analysis to encapsulate year-long simulations.

scholarly journals Applying Spiroid Winglet on The Tip of NREL 5 MW Offshore Wind Turbine’s Blade to Investigate Vortex Effects

2020 ◽  
Vol 197 ◽  
pp. 08004
Author(s):  
Behrouz Fathi
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Wind Energy ◽  
Wind Turbine ◽  
Relative Velocity ◽  
Suction Side ◽  
Operating Conditions ◽  
Offshore Wind ◽  
Energy Field ◽  
Computational Fluid Dynamics Cfd

The present research describes the numerical investigation of the aerodynamics around a wind turbine blade with a winglet using Computational Fluid Dynamics, CFD. In this project our goal is to applying spiroid winglet to examine of the vortex effects on the tip of wind turbine’s blade known as “NREL offshore 5-MW baseline wind turbine”. At present this method has not yet been implemented in the wind energy sector, in particular because their production still involves excessive costs, compared to the benefits obtainable in terms of wind energy field. A spiroid winglet was investigated with different twist distribution and camber in which pointing towards the suction side (downstream). The comparisons have been done between two operating conditions in terms of pressure, thrust, torque, relative velocity, streamlines, vorticity and then mechanical power.

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