International Journal of Sustainable and Green Energy
Volume 4, Issue 4, July 2015, Pages: 159-165
Received: May 21, 2015;
Accepted: Jun. 27, 2015;
Published: Jul. 7, 2015
Views 4991 Downloads 172
Ramadan Abdiwe, Institute for Energy Systems and Thermodynamics, Vienna University of Technology, Wien, Austria
Markus Haider, Institute for Energy Systems and Thermodynamics, Vienna University of Technology, Wien, Austria
The performance of the Solar Tower Receiver (STR) affects significantly the efficiency of the entire solar power generation system and minimizing the heat loss of the STR plays a dominant role in increasing its performance. Unlike the other thermal losses the convective heat loss in STR has direct relation with wind conditions. In this study a Simulation tool ANSYS® FLUENT® was used to determine the convection heat loss in both cavity and externalSTR at wind speed varies from(2) to (10) m/s. A fixed tilt angle (θ= 90°) for the cavity receiver is adopted. The results show that the convection heat loss in both receivers increases with increase of wind speed. The absolute values are considerably lower in the case of the cavity with comparison to the external type. Furthermore, the radiative heat loss in the external and the cavity receivers is investigated. The results show that for the same absorbed area, the radiation loss in the cavity is lower by almost (80%) than the radiation loss in the external.
Investigations on Heat Loss in Solar Tower Receivers with Wind Speed Variation, International Journal of Sustainable and Green Energy.
Vol. 4, No. 4,
2015, pp. 159-165.
Behar, O., Khellaf, A., and Mohammedi, K.,"A review of studies on central receiver solar thermal power plants". In: Renewable and Sustainable Energy Reviews, Algeria, pp. 12-39, 2013.
An Overview of CSP in Europe, North Africa and the Middle East, CSP Today, October; 2008.
IRENA, 2012, "Concentrating Solar Power. Cost analysis series". In: Renewable Energy Technologies.
Romero, Manuel.,Zarza, E., 2007, "Concentrating solar thermal power. Energy conversion". In: Taylor & Francis Group.
Romero, M., Buck, R., Pacheco, J., "An Update on Solar Central Receiver Systems, Projects, and Technologies". In: Solar Energy Engineering, Madrid, Spain, pp. 98-108, 2002.
Antonio, L., A vila-Marın., "Volumetric receivers in Solar Thermal Power Plants withCentral Receiver System technology: A review“. In: Solar Energy, Madrid, Spain, pp. 891-910, 2011.
Shuang-Ying Wu., Lan, Xiao., "Convection heat loss from cavity receiver in parabolic dish solar thermal power system: A review". In: Solar Energy, Chine, pp. 1342-1355, 2010.
Clausing, A.M., "An analysis of convective losses from cavity solar central receivers”. In: Solar Energy, USA, pp. 295-300, 1981.
Stine, W.B., McDonald, C.G., 1989, "Cavity receiver convective heat loss". In:Proceedings of International Solar Energy Society Solar World Congress,Japan, pp. 1318–1322.
Leibfried, U., Ortjohann, J., "Convective heat loss from upward anddownward-facingcavity solar receivers: measurements and calculations". In: Solar Energy Engineering, pp. 75–84, 1995.
Sendhil Kumar, N., Reddy, K.S., "Numerical investigation of naturalconvection heat loss in modified cavity receiver for fuzzy focal solar dish concentrator". In: Solar Energy, pp. 846–855, 2007.
Prakash, M., Kedare, S.B., Nayak, J.K., "Investigations on heat losses from a solar cavity receiver". In: Solar Energy, India, pp. 157–170, 2008.
Qiang, Yu.,Zhifeng, Wang., "Simulation and analysis of the central cavity receiver’s performanceof solar thermal power tower plant". In: Solar Energy, Chine, pp. 164-174, 2011.
A. Soum-Glaude, I. Bousquet, M. Bichotte, S. Quoizola, L. Thomas, G.Flamant, 2013,“Optical characterization and modeling of coatings intended as high temperature solar selective absorbers”. In: Solar PACES 2013, Las Vegas.
Springer, 2010, “VDI Heat Atlas, Second Edition”. Heidelberg, Germany.