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Numerical Investigation of Wind Flow around a Cylindrical Trough Solar Collector

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http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53017#.VLR7J8nQrzE

ABSTRACT
The goal of this study is to model the effects of wind on Cylindrical Trough Collectors (CTCs). Two major areas are discussed in this paper: 1) heat losses due to wind flow over receiver pipe and 2) average forces applied on the collector’s body. To accomplish these goals a 2D modeling of CTC was carried out using commercial codes with various wind velocities and collector orientations. Ambient temperature was assumed to be constant at 300 K and for specific geometries different meshing methods and boundary conditions were used in various runs. Validation was done by comparing the simulation results for a horizontal collector with empirical data. It was observed that maximum force of 509.1 Newton per Meter occurs at +60 degrees. Nusselt number is almost the constant for positive angles while at negative angles it varies considerably with the collector’s orientation.
 
Cite this paper
Shojaee, S. , Moradian, M. and Mashhoodi, M. (2015) Numerical Investigation of Wind Flow around a Cylindrical Trough Solar Collector. Journal of Power and Energy Engineering, 3, 1-10. doi: 10.4236/jpee.2015.31001.
 
References
[1]Mostofi, M., Nosrat, A.H. and Pearce, J.M. (2011) Institutional Scale Operational Symbiosis of Photovoltaic and Cogeneration Systems. International Journal of Environmental Science and Technology, 8, 31-44.
http://dx.doi.org/10.1007/BF03326193
 
[2]Goswami, D.Y., Kreith, F. and Kreider, J.F. (1999) Principles of Solar Engineering. 2nd Edition, Taylors & Francis Co., Philadelphia.
 
[3]Delyannis, A. (1967) Solar Stills Provide Island Inhabitants with Water. Sun at Work, 10, 6-8.
 
[4]Meinel, A.B. and Meinel, M.P. (1976) Applied Solar Energy. An Introduction. Addison-Wesley Pub. Co., Michigan.
 
[5]Kalogirou, S. (2004) Solar Thermal Collectors and Applications. Progress in Energy and Combustion Science, 30, 231295.
http://dx.doi.org/10.1016/j.pecs.2004.02.001
 
[6]Stine, W.B. (1987) Power from the Sun: Principles of High Temperature Solar Thermal Technology. Solar Energy Research Institute, Colorado.
 
[7]Mekhilef, S., Saidur, R. and Safari, A. (2011) A Review on Solar Energy Use in Industries. Renewable and Sustainable Energy Reviews, 15, 1777-1790.
http://dx.doi.org/10.1016/j.rser.2010.12.018
 
[8]Kalogirou, S. (2009) Solar Energy Engineering: Processes and Systems. Elsevier Inc., London.
 
[9]Chung, K.M., Chang, K.C. and Chou, C.C. (2011) Wind Loads on Residential and Large-Scale Solar Collector Models. Journal of Wind Engineering and Industrial Aerodynamics, 99, 59-64. http://dx.doi.org/10.1016/j.jweia.2010.10.008
 
[10]Kumar, S. and Mullick, S.C. (2010) Wind Heat Transfer Coefficient in Solar Collectors in Outdoor Conditions. Solar Energy, 84, 956-963.
http://dx.doi.org/10.1016/j.solener.2010.03.003
 
[11]Stojanovic, B., Hallberg, D. and Akander, J. (2010) A Steady State Thermal Duct Model Derived by Fin-Theory Approach and Applied on an Unglazed Solar Collector. Solar Energy, 84, 1838-1851.
http://dx.doi.org/10.1016/j.solener.2010.06.016
 
[12]Turgut, O. and Onur, N. (2009) Three Dimensional Numerical and Experimental Study of Forced Convection Heat Transfer on Solar Collector Surface. International Communications in Heat and Mass Transfer, 36, 274-279.
http://dx.doi.org/10.1016/j.icheatmasstransfer.2008.10.017
 
[13]Cheng, Z.D., He, Y.L., Xiao, J., Tao, Y.B. and Xu, R.J. (2010) Three-Dimensional Numerical Study of Heat Transfer Characteristics in the Receiver Tube of Parabolic Trough Solar Collector. International Communications in Heat and Mass Transfer, 37, 782-787.
http://dx.doi.org/10.1016/j.icheatmasstransfer.2010.05.002
 
[14]Naeeni, N. and Yaghoubi, M. (2006) Analysis of Wind Flow around a Parabolic Collector (1) Fluid Flow. Renewable Energy, 32, 1898-1916.
http://dx.doi.org/10.1016/j.renene.2006.10.004
 
[15]Naeeni, N. and Yaghoubi, M. (2006) Analysis of Wind Flow around a Parabolic Collector (2) Heat Transfer from Receiver Tube. Renewable Energy, 32, 1259-1272.
http://dx.doi.org/10.1016/j.renene.2006.06.005
 
[16]Yakhot, V. and Orszag, S.A. (1986) Renormalized Group Analysis of Turbulence: I. Basic Theory. Journal of Scientific Computing, 1, 3-51.
http://dx.doi.org/10.1007/BF01061452
 
[17]Cengel, Y.A. (2002) Heat Transfer: A Practical Approach. 2nd Edition, McGraw-Hill, New York.
 
[18]Scott, J. (2005) Drag of Cylinders & Cones.
http://www.aerospaceweb.org/question/aerodynamics/q0231.shtml                                eww150113lx

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