Numerical Investigation of Scheffler Solar Concentrator Receivers for Temperature Distribution and Steam Generation Rate.

Anita Arvind Nene, s Ramchandran

Abstract


Concentrated Solar Technology (CST) is a device which can concentrate solar radiation using mirrors or lenses to produce temperatures in the range of 1000C to 4500C or more.Scheffler solar concentrator as a CST system with fixed Focus was initially developed for direct cooking by concentrating solar energy in the kitchen but now used for generating steam and providing process heat.The receiver is the element of the system where the radiation is absorbed and converted to some other energy form. Receiver which contains a working fluid to be heated placed at the fixed focus of Scheffler concentrator. The working fluid is usually water to thermic fluid.Scheffler solar concentrator of 2.7m2 area has been taken for experimentation. Cylindrical and Conical shape receivers of 8 liters capacityare considered for analysis. Thermal efficiency of receiver is calculated on the basis of parameters like shape of receiver, initial heating of inlet water (50oC), tilting of receiver (45o), and receiver with glass cover for steam pressure up to 3 bars. A numerical analysis is performed for cylindrical and conical receiver using Fluent-15 CFD package. CFD analysis used to study the temperature distribution in receiver and mass of evaporated water quantity orsteam generating capacity for one bar pressure absolute.Finally numerical results are compared with experimental results.The result shows good agreement between numerical and experimental values of mass flow rate of steam with maximum deviation 9 % and 10.21 % for cylindrical and conical receiver respectively.


Total Views: 59

Keywords


Scheffler concentrator,fixed focus,Receiver, thermal efficiency.

Full Text:

PDF

References


M. Prakash, S.B. Kedare, J.K. Nayak, Investigations on heat losses from a solar cavity

receiver, Solar Energy 83 (2008) 157–170.

Hao Li, Li Rong and Guoqiang Zhang , "Study on convective heat transfer from pig models by CFD in a virtual wind tunnel," Journal of Computers and Electronics in Agriculture, 2016.

B. S. Gawali, A. G. Kawade, G. S. Deshpande, Thermal analysis of Scheffler cavity receiver for distribution and heat losses during solar period, ISHMT-ASME Heat and Mass Transfer Conference January 4-6, 2010, Mumbai, India.

M. Prakash, Numerical Study of Natural Convection Heat Loss from Cylindrical Solar Cavity Receivers, ISRN Renewable Energy, Volume 2014, Article ID 104686, 7 pages.

N. Sri Gokilavani, Experimental Studies and CFD Modeling on Solar Distillation System, International Journal of Innovative Research in Science Engineering and Technology, Vol. 3, Issue9, September 2014.

Ashish Kumar, Experimental and Simulation Study on Natural convection Solar Food Dryer, International Journal Of Science, Engineering And Technology, ISSN: 2348-4098 Volume 02 Issue 06, July 2014.

John D.Anderson,Computational Fluid Dynamics, McGrawHill,1995

H.K.Versteeg and W.Malalasekera,An Introduction to Computational Fluid Dynamics(The Finite Volume Method,2ndEdition,Pearson Education Limited,2007.

GrigoriosIordanou,Experimental studies coupled by Computational Fluid Dynamic (CFD)findings for the of Heat Transfer enhancement in Flat Plate Solar Water Collectors,IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE),Volume 11, Issue 3 PP 50-57, May- June.2014.

Mohamed B. Gadi,Design and simulation of a new energy-conscious system (CFD and solar simulation), Applied Energy 65 (2000) 251-256.

R. D. Jilte, S. B. Kedare, and J. K. Nayak, Comparison of Cavity Receivers with and without Mouth-Blockage of Different Shapes and Sizes Used in Paraboloid Dish Applications, Journal of Fundamentals of Renewable Energy and Applications,Vol. 2 (2012), Article ID R120306, 6 pages


Refbacks

  • There are currently no refbacks.


Online ISSN: 1309-0127

www.ijrer.org

ijrereditor@gmail.com; ilhcol@gmail.com;

IJRER is cited in SCOPUS, EBSCO, WEB of SCIENCE (Thomson Reuters)