Preliminary Performance Tests and Simulation of a V-Shape Roof Guide Vane Mounted on an Eco-Roof System

The technical and economic features of a patented V-shape roof guide vane (VRGV) with a solar and wind power generation system mounted on an eco-roof system are presented in this paper. Moreover, this innovative VRGV was investigated on for the purpose of improving the performance of a vertical axis wind turbine (VAWT), which was installed on an eco-roof system to solve the low-efficiency power generation problem of the wind turbines under the condition of a low wind speed. This paper proposes a preliminary study for the performance of the VAWT with the VRGV on a building. This research used a mock-up building with a double slope roof, where a five straight-bladed VAWT was mounted and tested under two conditions, with and without the VRGV. From the comparative experiments, the self-starting performance and rotational speed of the VAWT mounted above a double slope roof with the VRGV have been significantly improved compared to the VAWT without the VRGV. Further, the power coefficient (Cp) of the VAWT can be augmented to about 71.2% increment due to the VRGV design. In addition, numerical simulations by computational fluid dynamics (CFD) were proposed to verify the augmented effect of the Cp of the VAWT under the influence of the VRGV in the experiment. Besides, economic estimation of the VRGV was conducted.

[1]  Zahra Sadat Zomorodian,et al.  Energy and economic performance of rooftop PV panels in the hot and dry climate of Iran , 2018 .

[2]  Maria Vahdati,et al.  Dynamic Stall for a Vertical Axis Wind Turbine in a Two-Dimensional Study , 2011 .

[3]  Carlos Simao Ferreira,et al.  2D CFD Simulation of Dynamic Stall on a Vertical Axis Wind Turbine: Verification and Validation with PIV Measurements , 2007 .

[4]  Marius Paraschivoiu,et al.  3D analysis of building mounted VAWT with diffuser shaped shroud , 2016 .

[5]  Shengyi Wang,et al.  Numerical investigations on dynamic stall of low Reynolds number flow around oscillating airfoils , 2010 .

[6]  David Jenkins,et al.  Micro wind turbines in the UK domestic sector , 2008 .

[7]  Qing’an Li,et al.  Numerical Investigation of the Tip Vortex of a Straight-Bladed Vertical Axis Wind Turbine with Double-Blades , 2017 .

[8]  J. Strickland,et al.  Dynamic-stall regulation of the Darrieus turbine , 1983 .

[9]  Ernesto Benini,et al.  A computational assessment of the aerodynamic performance of a tilted Darrieus wind turbine , 2015 .

[10]  Brian Kirke,et al.  Tests on ducted and bare helical and straight blade Darrieus hydrokinetic turbines , 2011 .

[11]  C. W. Tong,et al.  Preliminary Assessment of Optimized Accessorial Roof Shape for Performance of Wind Turbine Mounted on Eco-Roof System , 2018, International Journal of Precision Engineering and Manufacturing-Green Technology.

[12]  William D'haeseleer,et al.  Determining optimal electricity technology mix with high level of wind power penetration , 2011 .

[13]  T. Maeda,et al.  A straight-bladed vertical axis wind turbine with a directed guide vane row — Effect of guide vane geometry on the performance — , 2009 .

[14]  Giovanni Ferrara,et al.  An Improved Model for the Performance Estimation of an H-Darrieus Wind Turbine in Skewed Flow , 2012 .

[15]  Freyr Sverrisson,et al.  Renewables Global Status Report 2016 (GSR2016) , 2016 .

[16]  Shashank Priya,et al.  Small-scale wind energy portable turbine (SWEPT) , 2013 .

[17]  Robert Dominy,et al.  Self-starting capability of a Darrieus turbine , 2007 .

[18]  Stig Irving Olsen,et al.  Ecodesign framework for developing wind turbines , 2016 .

[19]  Teuku Meurah Indra Mahlia,et al.  Techno-economic analysis of a wind–solar hybrid renewable energy system with rainwater collection feature for urban high-rise application , 2011 .

[20]  Wei-Cheng Wang,et al.  Life cycle assessment of small-scale horizontal axis wind turbines in Taiwan , 2017 .

[21]  N. Sulong,et al.  Integration of thermal insulation coating and moving-air-cavity in a cool roof system for attic temperature reduction , 2013 .

[22]  Matthew Cable,et al.  An Evaluation of Turbulence Models for the Numerical Study of Forced and Natural Convective Flow in Atria , 2009 .

[23]  Jin,et al.  Performance Analysis and Design of Vertical Axis Tidal Stream Turbine , 2012 .

[24]  Abdolrahim Rezaeiha,et al.  Effect of pitch angle on power performance and aerodynamics of a vertical axis wind turbine , 2017 .

[25]  Wee Siong Siow.  Formulation of Empirical Models for Solar Module by Optimisation of its Tilt-Angle Under Natural Conditions , 2001 .

[26]  Ernesto Benini,et al.  The Darrieus wind turbine: Proposal for a new performance prediction model based on CFD , 2011 .

[27]  Wenping Cao,et al.  Wind Turbine Generator Technologies , 2012 .

[28]  Saad Mekhilef,et al.  Performance evaluation of a stand-alone PV-wind-diesel-battery hybrid system feasible for a large resort center in South China Sea, Malaysia , 2017 .

[29]  Şafak Sağlam,et al.  A technical review of building-mounted wind power systems and a sample simulation model , 2012 .

[30]  H. Bijl,et al.  Simulating Dynamic Stall in a 2D VAWT: Modeling strategy, verification and validation with Particle Image Velocimetry data , 2007 .

[31]  Brian A. Fleck,et al.  Comparative life cycle energy, emission, and economic analysis of 100 kW nameplate wind power generation , 2012 .

[32]  Jonathan Whale,et al.  Performance and safety of rooftop wind turbines: Use of CFD to gain insight into inflow conditions , 2014 .

[33]  Y. Shiah,et al.  3D CFD simulation and parametric study of a flat plate deflector for vertical axis wind turbine , 2018, Renewable Energy.

[34]  M. F. Jentsch,et al.  Vertical axis resistance type wind turbines for use in buildings , 2009 .

[35]  Peng Yuan,et al.  A Review of Micro Wind Turbines in the Built Environment , 2010, 2010 Asia-Pacific Power and Energy Engineering Conference.

[36]  Alex Maurício Araújo,et al.  A review on wind turbine control and its associated methods , 2018 .

[37]  J. Sodja.  Turbulence models in CFD , 2007 .

[38]  Brian Norton,et al.  The impact of array inclination and orientation on the performance of a grid-connected photovoltaic system , 2007 .

[39]  Patrick James,et al.  Urban energy generation: Influence of micro-wind turbine output on electricity consumption in buildings , 2007 .

[40]  Brian Vad Mathiesen,et al.  A review of computer tools for analysing the integration of renewable energy into various energy systems , 2010 .

[41]  Hans Bernhoff,et al.  Analytical solutions for a single blade in vertical axis turbine motion in two dimensions , 2009 .

[42]  Mats Leijon,et al.  Evaluation of different turbine concepts for wind power , 2008 .

[43]  T. Shih,et al.  A new k-ϵ eddy viscosity model for high reynolds number turbulent flows , 1995 .

[44]  Lennart Söder,et al.  Wind energy technology and current status : a review , 2000 .

[45]  Wen Tong Chong,et al.  Early development of an innovative building integrated wind, solar and rain water harvester for urban high rise application , 2012 .

[46]  Robert Dominy,et al.  Darrieus turbines: The physics of self-starting , 2009 .

[47]  U. Jahn,et al.  Performance of 170 grid connected PV plants in Northern Germany—Analysis of yields and optimization potentials , 1997 .

[48]  Yutaka Hara,et al.  Comparative CFD analysis of Vertical Axis Wind Turbine in upright and tilted configuration , 2016 .

[49]  Wen Tong Chong,et al.  The design, simulation and testing of an urban vertical axis wind turbine with the omni-direction-guide-vane , 2013 .

[50]  Wen Tong Chong,et al.  Performance analysis of an off-grid wind-PV (photovoltaic)-diesel-battery hybrid energy system feasible for remote areas , 2016 .

[51]  A. El-aziz,et al.  Study of wind effects on different buildings of pitched roofs , 2007 .

[52]  H. Lam,et al.  Study of wake characteristics of a vertical axis wind turbine by two- and three-dimensional computational fluid dynamics simulations , 2016 .

[53]  Christian Langer,et al.  A method for the identification of configurations of PV/wind hybrid systems for the reliable supply of small loads , 1996 .

[54]  G.A.M. van Kuik,et al.  Wind Energy in the Built Environment , 2005 .

[55]  Maria Vahdati,et al.  Unsteady flow simulation of a vertical axis augmented wind turbine: A two-dimensional study , 2014 .

[56]  Wen Tong Chong,et al.  Design and testing of a novel building integrated cross axis wind turbine , 2017 .

[57]  Wen Tong Chong,et al.  Exhaust air energy recovery system for electrical power generation in future green cities , 2013 .

[58]  Wen Tong Chong,et al.  Performance assessment of a hybrid solar-wind-rain eco-roof system for buildings , 2016 .

[59]  Isam Janajreh,et al.  Implementation and economical study of HAWT under different wind scenarios , 2015 .

[60]  Renato Ricci,et al.  Design, testing and simulation of hybrid wind-solar energy systems , 2013 .