Effects of Outdoor Conditions on the Compound Parabolic Concentrator Performance
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Abstract
In this study, the effect of outdoor conditions
(wind velocity and ambient temperature) on the thermal
efficiency of a non-evacuated Compound Parabolic
Concentrator solar collector (CPC) was investigated for
two different flow rates. Matlab program was built, and
simulation results for different outdoor conditions were
compared with an actual outdoor data set that was taken
at Misurata city, Libya. Although this study showed some
effects of outdoor conditions on the CPC collector
component’s temperatures and heat losses, no important
influence on the collector efficiency was noticed.
Therefore, even though wind velocity and ambient
temperature vary throughout the day, approximating
them as constant values is a reasonable assumption. Mass
flow rate is the most important parameter that affects the
CPC efficiency.
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References
Rabl A., Optical and thermal properties of compound parabolic
concentrators. Solar Energy, 18, 497, (1976).
Hsieh C.K, Thermal analysis of CPC collectors. Solar Energy, 27,
pp.19–29, (1981).
Kothdiwala A. F., Norton B. and Eames P.C., The effect of
variation of angle of inclination on the performance of lowconcentration-
ratio compound parabolic concentrating solar
collectors. Solar Energy, 55, 301 (1995).
Fraidenraich N, Lima R.DEC.F.DE, Tiba C., and Barbosa E.M.
DES., Simulation model of collector with temperature dependent
heat loss coefficient. Solar Energy, 65, pp. 99–110, (1999).
Tchinda R. and Ngos N., A theoretical evaluation of the thermal
performance of CPC with flat one-sided absorber. Heat and Mass
transfer, 33, pp.709-718, (2006).
Bansal N.K. and Sharma A.K., Transient theory of a tubular
solar energy collector. Solar Energy, 32, 67 (1984).
Chakraverty S., Bansal N.K. and Garg H.P., Transient analysis
of a CPC collector with time dependent input function. Solar
Energy, 38, 179 (1987).
Patel, D. S., and Patel, D. K., Thermal analysis of compound
parabolic concentrator. IJMPERD, 5, 6, , pp. 117-126, (2015).
Gnielinski, V., New equations for heat and mass transfer in
turbulent pipe and channel flow. International Chemical
Engineering, (16:2); pp. 359-363, (1976).
Itoh M., Fujita T., Nishiwaki N. and Hirata M. A, A new method
of correlating heat transfer coefficients for natural convection in
horizontal cylindrical annuli. Int. J. Heat Mass Transfer, 13, pp.
-1368(1970).
Rabl A ., Comparison of solar concentrators. Solar Energy, 17,
, (1976).
Eames P.C. and Norton B., Detailed parametric analysis of heat
transfer in CPC solar energy collectors. Solar Energy, 50, 321
(1993).