Login | Register

Augmenting Urban Wind Energy: Shrouded Diffuser Casing for Roof-mounted Wind Turbines

Title:

Augmenting Urban Wind Energy: Shrouded Diffuser Casing for Roof-mounted Wind Turbines

Dilimulati, Aierken (2017) Augmenting Urban Wind Energy: Shrouded Diffuser Casing for Roof-mounted Wind Turbines. Masters thesis, Concordia University.

[img]
Preview
Text (application/pdf)
Dilimulati_MSc_S2018.pdf - Accepted Version
Available under License Spectrum Terms of Access.
7MB

Abstract

The increased demand for renewable energy and the development of energy independent building designs have motivated significant research into the improvement of wind power technologies that target urban environments. However, the implementation of wind turbines in urban environments still faces many challenges. The complexity of wind profile and high turbulence due to the topographical characteristics of urban environments severely limit the performance of urban wind turbines. To explore possible solutions to such challenges and better understand them, the current state of urban wind energy is thoroughly reviewed and the urban flow characteristics are investigated using computational fluid dynamics (CFD). Promising directions that can improve urban wind turbine performance are identified. A flanged shrouded diffuser mechanism - a fluid machine, mounted on rooftop of buildings used as a casing for small wind turbines can significantly improve turbine performance. The fluid machine can increase the wind energy potential by up to a factor of four, by guiding and accelerating the airflow over the building roofs utilizing its geometric features such as, cycloidal curve surface at the inlet and a vortex generating flange at the outlet. The performance of the fluid machine is tested using CFD and wind tunnel tests are also performed. To provide further evidence for its performance, the diffuser mechanism is modeled on the rooftop of an existing building in a test site in Montreal, Canada using CFD and the topographical map including the geometrical data of the buildings in the test site. The CFD analysis performed on the diffuser mechanism in the test site used real statistical wind data of the city of Montreal. CFD investigation of the test site found close agreement with the initially predicted performance of the mechanism. As a power-augmenting device, the fluid machine can mitigate the challenges faced by the urban wind energy systems and it opens new ways to improving energy efficiency of urban wind turbines.

Divisions:Concordia University > Gina Cody School of Engineering and Computer Science > Mechanical, Industrial and Aerospace Engineering
Item Type:Thesis (Masters)
Authors:Dilimulati, Aierken
Institution:Concordia University
Degree Name:M.A. Sc.
Program:Mechanical Engineering
Date:31 October 2017
Thesis Supervisor(s):Paraschivoiu, Marius and Stathopoulos, Ted
Keywords:Urban Energy, Wind Turbines, Diffuser Shroud casing, Sustainable energy, Urban wind
ID Code:983202
Deposited By: AIERKEN DILIMULATI
Deposited On:11 Jun 2018 03:10
Last Modified:11 Jun 2018 03:10

References:

Encraft Warwick Wind Trials Final Report2009. 2016, 64.
Abohela, I., Hamza, N., Dudek, S. 2013. Effect of roof shape, wind direction, building height and urban configuration on the energy yield and positioning of roof mounted wind turbines. Renewable Energy 50, 1106-18.
Ani, S.O., Polinder, H., Ferreira, J.A. 2013. Comparison of Energy Yield of Small Wind Turbines in Low Wind Speed Areas. IEEE Transactions on Sustainable Energy 4, 42-9.
An-Shik Yang, Ying-Ming Su, Chih-Yung Wen, Yu-Hsuan Juan, Wei-Siang Wang, Chiang-Ho Cheng. 2016a. Estimation of wind power generation in dense urban area. Applied Energy 171, 213-30.
An-Shik Yang, Ying-Ming Su, Chih-Yung Wen, Yu-Hsuan Juan, Wei-Siang Wang, Chiang-Ho Cheng. 2016b. Estimation of wind power generation in dense urban area. Applied Energy 171, 213-30.
Ansys, F. 2011. ANSYS FLUENT 14.0 Theory Guide. www.fluent.com 2016.
Ashwill, T.D., Veers, P.S. 1990. Structural response measurements and predictions for the Sandia 34-meter test bed 9, 137-144.
Balduzzi, F., Bianchini, A., Carnevale, E.A., Ferrari, L., Magnani, S. 2012. Feasibility analysis of a Darrieus vertical-axis wind turbine installation in the rooftop of a building. Applied Energy 97, 921-929.
Batista, N.C., Melicio, R., Mendes, V.M.F., Calderon, M., Ramiro, A. 2015. On a self-start Darrieus wind turbine: Blade design and field tests. Renewable and Sustainable Energy Reviews 52, 508-522.
Belkacem, B., Paraschivoiu, M. 2016. CFD Analysis of a Finite Linear Array of Savonius Wind Turbines 753.
Bilir, L., Imir, M., Devrim, Y., Albostan, A. 2015. An investigation on wind energy potential and small scale wind turbine performance at Incek region - Ankara, Turkey. Energy Conversion and Management 103, 910-23.
Blocken, B., Roels, S., Carmeliet, J. 2004. Modification of pedestrian wind comfort in the Silvertop Tower passages by an automatic control system. Journal of Wind Engineering and Industrial Aerodynamics 92, 849-73.
Blocken, B. 2015. Computational Fluid Dynamics for urban physics: Importance, scales, possibilities, limitations and ten tips and tricks towards accurate and reliable simulations. Building and Environment 91, 219-245.
Blocken, B., Carmeliet, J. 2004. Pedestrian wind environment around buildings: Literature review and practical examples. Journal of Thermal Envelope and Building Science 28, 107-159.
Cace, J., Horst, E., Syngellakis, K., Niel, M., Clement, P., Heppener, R., Peirano, E. 2007. Urban Wind Turbines, Guidelines for small wind turbines in the built environment 2016, 41.
Chandel, S.S., Ramasamy, P., Murthy, K.S.R. 2014. Wind power potential assessment of 12 locations in western Himalayan region of India. Renewable and Sustainable Energy Reviews 39, 530-545.
Chong, W.T., Fazlizan, A., Poh, S.C., Pan, K.C., Hew, W.P., Hsiao, F.B. 2013. The design, simulation and testing of an urban vertical axis wind turbine with the omni-direction-guide-vane. Applied Energy 112, 601-609.
Chong, W.T., Poh, S.C., Fazlizan, A., Pan, K.C. 2012. Vertical axis wind turbine with omni-directional-guide-vane for urban high-rise buildings. Journal of Central South University of Technology 19, 727-32.
Cleynen, O. 2015. Boundary layer separation, https://commons.wikimedia.org/wiki/File:Boundary_layer_separation.svg 2017, 1.
D'Ambrosio, M., Medaglia, M. 2010. Vertical Axis Wind Turbines: History, Technology and Applications.
Danao, L.A., Eboibi, O., Howell, R. 2013. An experimental investigation into the influence of unsteady wind on the performance of a vertical axis wind turbine. Applied Energy 107, 403-411.
Drachmann, A.G. 1961. Heron's Windmill, in: Heron's Windmill, 145-151. Centaurus.
Elkhoury, M., Kiwata, T., Aoun, E. 2015. Experimental and numerical investigation of a three-dimensional vertical-axis wind turbine with variable-pitch. Journal of Wind Engineering & Industrial Aerodynamics 139, 111-23.
Eriksson, S., Bernhoff, H., Leijon, M. 2008. Evaluation of different turbine concepts for wind power. Renewable and Sustainable Energy Reviews 12, 1419-1434.
Franke, J., Hellsten, A., Schlunzen, K.H., Carissimo, B. 2011. The COST 732 Best Practice Guideline for CFD simulation of flows in the urban environment: A summary. International Journal of Environment and Pollution 44, 419-427.
Glass, A., Levermore, G. 2011. Micro wind turbine performance under real weather conditions in urban environment. Building Services Engineering Research & Technology 32, 245-62.
Govindharajan, R., Parammasivam, K.M., Vishnu Priya, R. 2013. NUMERICAL INVESTIGATION AND DESIGN OPTIMIZATION OF BRIMMED DIFFUSER – WIND LENS AROUND A WIND TURBINE. The Eighth Asia-Pacific Conference on Wind Engineering.
Grieser, B., Sunak, Y., Madlener, R. 2015. Economics of small wind turbines in urban settings: an empirical investigation for Germany. Renewable Energy 78, 334-50.
Kadar, P. 2012. Comparative performance analysis of small scale wind turbines. Journal of Engineering Science and Technology Review 5, 42-47.
Karava, P., Jubayer, C.M., Savory, E. 2011. Numerical modelling of forced convective heat transfer from the inclined windward roof of an isolated low-rise building with application to photovoltaic/thermal systems. Applied Thermal Engineering 31, 1950-1963.
Kosasih, B., Saleh Hudin, H. 2016. Influence of inflow turbulence intensity on the performance of bare and diffuser-augmented micro wind turbine model. Renewable Energy 87, 154-167.
Kosasih, B., Tondelli, A. 2012. Experimental Study of Shrouded Micro-Wind Turbine. Procedia Engineering 49, 92-98.
Krishnan, A., Paraschivoiu, M. 2015. 3D analysis of building mounted VAWT with diffuser shaped shroud. Sustainable Cities and Society.
Larin, P., Paraschivoiu, M., Aygun, C. 2016. CFD based synergistic analysis of wind turbines for roof mounted integration. Journal of Wind Engineering & Industrial Aerodynamics 156, 1-13.
Ledo, L., Kosasih, P.B., Cooper, P. 2011. Roof mounting site analysis for micro-wind turbines. Renewable Energy 36, 1379-91.
Lubitz, D., Hakimi, R. 2014. Wind environment at a roof-mounted wind turbine on a peaked roof building. International Journal of Sustainable Energy 35, 172-189.
Macpherson, R.B. 1972. Development and Testing of Low-head High-Efficiency Kinetic Energy Machines -An Alternative for the Future.
Manwell, J.F., Mcgowan, J.G., Roger, A.L. 2002. Wind Energy Explained: Theory, Design and Application. John Wiley and Sons Ltd, Chichester, United Kingdom.
McKeon, B.J., Smits, A.J. 2002. Static pressure correction in high Reynolds number fully developed turbulent pipe flow. Measurement Science & Technology 13, 1608-14.
Mertens, S. 2002. Wind energy in urban areas: Concentrator effects for wind turbines close to buildings. Refocus 3, 22-24.
Miller, A., Chang, B., Issa, R., Chen, G. 2013. Review of computer-aided numerical simulation in wind energy. Renewable and Sustainable Energy Reviews 25, 122-34.
Modi, V.J., Roth, N.J., Fernando, M.S.U.K. 1984. Optimum-configuration studies and prototype design of a wind-energy-operated irrigation system. Journal of Wind Engineering and Industrial Aerodynamics 16, 85-96.
Morbiato, T., Borri, C., Vitaliani, R. 2014. Wind energy harvesting from transport systems: A resource estimation assessment. Applied Energy 133, 152-68.
Morgan, C.A., Gardner, P., Mays, I.D., Anderson, M.B. 1989. The demonstration of a stall regulated 100 kW vertical axis wind turbine, 645-9.
Muljadi, E., Pierce, K., Migliore, P. 1998. Control strategy for variable-speed, stall-regulated wind turbines 3, 1710-1714.
Newman, B.G. 1983. ACTUATOR-DISC THEORY FOR VERTICAL-AXIS WIND TURBINES. Journal of Wind Engineering and Industrial Aerodynamics 15, 347-355.
Nishimura, A., Ito, T., Kakita, M., Murata, J., Ando, T., Kamada, Y., Hirota, M., Kolhe, M. 2014. Impact of building layouts on wind turbine power output in the built environment: A case study of tsu city. Nihon Enerugi Gakkaishi/Journal of the Japan Institute of Energy 93, 315-322.
Ohya, Y., Uchida, T., Karasudani, T., Hasegawa, M., Kume, H. 2012. Numerical studies of flow around a wind turbine equipped with a flanged-diffuser shroud using an actuator-disk model. Wind Engineering 36, 455-72.
Ohya, Y., Karasudani, T. 2010. A shrouded wind turbine generating high output power with wind-lens technology. Energies 3, 634-649.
Ohya, Y., Karasudani, T., Sakurai, A., Abe, K., Inoue, M. 2008. Development of a shrouded wind turbine with a flanged diffuser. Journal of Wind Engineering and Industrial Aerodynamics 96, 524-539.
Pagnini, L.C., Burlando, M., Repetto, M.P. 2015. Experimental power curve of small-size wind turbines in turbulent urban environment. Applied Energy 154, 112-21.
Paraschivoiu, I. 2002. Wind turbine design with emphasis on Darrieus concept. Polytechnic International Press, Canada.
Park, J., Jung, H., Lee, S., Park, J. 2015. A new building-integrated wind turbine system utilizing the building. Energies 8, 11846-11870.
Patankar, B., Tyagi, R., Kiss, D., Suma, A.B. 2016. Evaluation of an Integrated Roof Wind Energy System for urban environments. Journal of Physics: Conference Series 753, 102007 (11 pp.).
Peace, S. 2004. Another approach to wind. Mechanical Engineering 126, 28.
Prospathopoulos, J.M., Politis, E.S., Chaviaropoulos, P.K. 2012. Application of a 3D RANS solver on the complex hill of Bolund and assessment of the wind flow predictions. Journal of Wind Engineering and Industrial Aerodynamics 107-108, 149-59.
Ragheb, M. 2012. Wind turbines in the urban environment 2016, 16.
Rolland, S., Newton, W., Williams, A.J., Croft, T.N., Gethin, D.T., Cross, M. 2013a. Simulations technique for the design of a vertical axis wind turbine device with experimental validation. Applied Energy 111, 1195-203.
Rolland, S.A., Thatcher, M., Newton, W., Williams, A.J., Croft, T.N., Gethin, D.T., Cross, M. 2013b. Benchmark experiments for simulations of a vertical axis wind turbine. Applied Energy 111, 1183-1194.
Roy, S., Saha, U.K. 2015. Wind tunnel experiments of a newly developed two-bladed Savonius-style wind turbine. Applied Energy 137, 117-125.
Saha, U.K., Thotla, S., Maity, D. 2008. Optimum design configuration of Savonius rotor through wind tunnel experiments. Journal of Wind Engineering and Industrial Aerodynamics 96, 1359-1375.
Sharpe, T., Proven, G. 2010. Crossflex: Concept and early development of a true building integrated wind turbine. Energy and Buildings 42, 2365-2375.
Shikha, Bhatti, T.S., Kothari, D.P. 2005. Early development of modern vertical and horizontal axis wind turbines: a review. Wind Engineering 29, 287-99.
Stathopoulos, T., Surry, D. 1983. SCALE EFFECTS IN WIND TUNNEL TESTING OF LOW BUILDINGS. Journal of Wind Engineering and Industrial Aerodynamics 13, 313-326.
Tabassum, S.A., Probert, S.D. 1987. VERTICAL-AXIS WIND TURBINE: A MODIFIED DESIGN. Applied Energy 28, 59-67.
Toja-Silva, F., Colmenar-Santos, A., Castro-Gil, M. 2013. Urban wind energy exploitation systems: Behaviour under multidirectional flow conditions-Opportunities and challenges. Renewable and Sustainable Energy Reviews 24, 364-78.
Touryan, K.J., Strickland, J.H., Berg, D.E. 1987. ELECTRIC POWER FROM VERTICAL-AXIS WIND TURBINES. Journal of Propulsion and Power 3, 481-493.
Wang, W., Matsubara, T., Hu, J., Odahara, S., Nagai, T., Karasutani, T., Ohya, Y. 2015. Experimental investigation into the influence of the flanged diffuser on the dynamic behavior of CFRP blade of a shrouded wind turbine. Renewable Energy 78, 386-397.
Wright, A.K., Wood, D.H. 2004. The starting and low wind speed behaviour of a small horizontal axis wind turbine. Journal of Wind Engineering and Industrial Aerodynamics 92, 1265-1279.
Yan-Fei Wang, Mao-Sheng Zhan. 2015. Effect of barchan dune guide blades on the performance of a lotus-shaped micro-wind turbine. Journal of Wind Engineering & Industrial Aerodynamics 136, 34-43.
All items in Spectrum are protected by copyright, with all rights reserved. The use of items is governed by Spectrum's terms of access.

Repository Staff Only: item control page

Downloads per month over past year

Back to top Back to top