Numerical Investigation of Hot Oil Velocity Effect on Force Heat Convection and Impact of Wind Velocity on Convection Heat Transfer in Receiver Tube of Parabolic Trough Collector System
A solar receiver is designed for operation under
extremely uneven heat flux distribution, cyclic weather, and cloud
transient cycle conditions, which can include large thermal stress and
even receiver failure. In this study, the effect of different oil velocity
on convection coefficient factor and impact of wind velocity on local
Nusselt number by Finite Volume Method will be analyzed. This
study is organized to give an overview of the numerical modeling
using a MATLAB software, as an accurate, time efficient and
economical way of analyzing the heat transfer trends over stationary
receiver tube for different Reynolds number. The results reveal when
oil velocity is below 0.33m/s, the value of convection coefficient is
negligible at low temperature. The numerical graphs indicate that
when oil velocity increases up to 1.2 m/s, heat convection coefficient
increases significantly. In fact, a reduction in oil velocity causes a
reduction in heat conduction through the glass envelope. In addition,
the different local Nusselt number is reduced when the wind blows
toward the concave side of the collector and it has a significant effect
on heat losses reduction through the glass envelope.
[1] O. Afshar, R. Saidur, M. Hassanuzzaman, and M. Jameel, “A review of
thermodynamics and heat transfer in solar refrigeration system,”
Renewable and Sustainable Energy Reviews, vol. 16, pp.5639-5648,
10//2012.
[2] S.D. Sharma, K. Sagara, “Latent heat storage materials and systems: a
review,” International Journal Green Energy, vol. 2, pp. 1-56, 2005.
[3] Q. Yu, ZF. Wang, ES> Xu, “Analysis and improvement of solar flux
distribution inside a cavity receiver based on multi-focal points of
heliostat field,” Apply Energy, vol. 136, pp. 417-430, 2014.
[4] JF. Lu, J. Ding, JP. Yang, XX. Yang, “Non-uniform heat transfer model
and performance of parabolic trough solar receiver,” Energy, vol. 59, pp.
666-675, 2013.
[5] C. Patrice, S. Abanades, F. Lemort, G. Flamant, “Analysis of solar
chemical processes for hydrogen production from water splitting
thermochemical cycles,” Energy Conversion and Management, vol. 49,
pp. 1547-1556, 2008
[6] XW. Song, GB. Dong. FY. Gao, XG. Diao, LQ. Zheng, FY. Zhou, “A
numerical study of parabolic trough receiver with non-uniform heat flux
and helical screw-tape inserts”, Energy, vol. 77, pp. 771-782, 2014.
[7] M.J. Montes, A. Rovira, J.M. Martinez-Val, and A. Ramos, “Proposal of
a fluid flow layout to improve the heat transfer in the active absorber
surface of solar central cavity receivers,” Applied Thermal Engineering,
vol. 35, pp. 220-232, 3//2012.
[8] H.Price, “Assessment of parabolic trough and power tower solar
technology cost and performance forecasts,” National Renewable
Energy Laboratory, Golden, CO, 2003.
[9] L. Zhang, Z. Yu, L. Fan, W. wang, H. Chen, Y, Hu, “ An experimental
investigation of the heat losses of a U-type solar heat pipe receiver of a
parabolic trough collector-based natural circulation steam generation
system,” Renewable Energy, vol.57, pp.1910-1914, 9//2011.
[10] S.A. Kalogirou, “A detailed thermal model of a parabolic trough
collector receiver,” Energy, vol. 48, pp. 298-306, 12//2012.
[11] F.P. Incropera, Fundamentals of heat and mass transfer: John Wiley&
Sons, 2011 [12] R.E. Forristall, Heat transfer analysis and modeling of a parabolic trough
solar receiver implemented in engineering equation solver: National
Renewable Energy Laboratory, 2003.
[13] S.M. Akbarimoosavi and M. Yaghoubi, “3D thermal structural analysis
of an absorber tube of a parabolic trough collector and the effect of tube
deflection on optical efficiency,” Energy Procedia, vol. 49, pp. 2433-
2443, //2014.
[14] M. Yaghoubi, and M. Akbari, “Three dimensional thermal expansion
analysis of an absorber tube in a parabolic trough collector,” Solar
PACES conference, Spain, 2011.
[15] S. Ghadirijafarbeigloo, A.H. Zamzamian, and M. Yaghoubi, “3D
numerical simulation of heat transfer and turbulent flow in a receiver
tube of solar parabolic trough concentrator with louvered twisted-tape
inserts,” Energy Procedia, vol. 49, pp. 373-380,//2014.
[16] N. Naeeni and M. Yaghoubi, “Analysis of wind flow around a parabolic
collector (1) fluid flow,” Renewable Energy, vol. 32, pp. 1898-1916,
9//2007.
[17] Y.S. Touloukian and D.P. Dewitt, “Thermo physical properties of
matter-the TPRC data series. Volume 7. Thermal Radiative Properties-
Metallic Elements and Alloys,” DTIC Document 1970.
[18] H. Al-Ansary and O. Zeitoun,” numerical study of conduction and
convection heat losses from a half-insulated air-filled annulus of the
receiver of a parabolic trough collector,” Solar Energy, vol. 85, pp.
3036-3045,11//2011.
[19] N. Naeeni and M. Yaghoubi, “Analysis of wind flow around a parabolic
collector (2) heat transfer from receiver tube,” Renewable Energy, vol.
32, pp. 1259-1272, 7//2007.
[1] O. Afshar, R. Saidur, M. Hassanuzzaman, and M. Jameel, “A review of
thermodynamics and heat transfer in solar refrigeration system,”
Renewable and Sustainable Energy Reviews, vol. 16, pp.5639-5648,
10//2012.
[2] S.D. Sharma, K. Sagara, “Latent heat storage materials and systems: a
review,” International Journal Green Energy, vol. 2, pp. 1-56, 2005.
[3] Q. Yu, ZF. Wang, ES> Xu, “Analysis and improvement of solar flux
distribution inside a cavity receiver based on multi-focal points of
heliostat field,” Apply Energy, vol. 136, pp. 417-430, 2014.
[4] JF. Lu, J. Ding, JP. Yang, XX. Yang, “Non-uniform heat transfer model
and performance of parabolic trough solar receiver,” Energy, vol. 59, pp.
666-675, 2013.
[5] C. Patrice, S. Abanades, F. Lemort, G. Flamant, “Analysis of solar
chemical processes for hydrogen production from water splitting
thermochemical cycles,” Energy Conversion and Management, vol. 49,
pp. 1547-1556, 2008
[6] XW. Song, GB. Dong. FY. Gao, XG. Diao, LQ. Zheng, FY. Zhou, “A
numerical study of parabolic trough receiver with non-uniform heat flux
and helical screw-tape inserts”, Energy, vol. 77, pp. 771-782, 2014.
[7] M.J. Montes, A. Rovira, J.M. Martinez-Val, and A. Ramos, “Proposal of
a fluid flow layout to improve the heat transfer in the active absorber
surface of solar central cavity receivers,” Applied Thermal Engineering,
vol. 35, pp. 220-232, 3//2012.
[8] H.Price, “Assessment of parabolic trough and power tower solar
technology cost and performance forecasts,” National Renewable
Energy Laboratory, Golden, CO, 2003.
[9] L. Zhang, Z. Yu, L. Fan, W. wang, H. Chen, Y, Hu, “ An experimental
investigation of the heat losses of a U-type solar heat pipe receiver of a
parabolic trough collector-based natural circulation steam generation
system,” Renewable Energy, vol.57, pp.1910-1914, 9//2011.
[10] S.A. Kalogirou, “A detailed thermal model of a parabolic trough
collector receiver,” Energy, vol. 48, pp. 298-306, 12//2012.
[11] F.P. Incropera, Fundamentals of heat and mass transfer: John Wiley&
Sons, 2011 [12] R.E. Forristall, Heat transfer analysis and modeling of a parabolic trough
solar receiver implemented in engineering equation solver: National
Renewable Energy Laboratory, 2003.
[13] S.M. Akbarimoosavi and M. Yaghoubi, “3D thermal structural analysis
of an absorber tube of a parabolic trough collector and the effect of tube
deflection on optical efficiency,” Energy Procedia, vol. 49, pp. 2433-
2443, //2014.
[14] M. Yaghoubi, and M. Akbari, “Three dimensional thermal expansion
analysis of an absorber tube in a parabolic trough collector,” Solar
PACES conference, Spain, 2011.
[15] S. Ghadirijafarbeigloo, A.H. Zamzamian, and M. Yaghoubi, “3D
numerical simulation of heat transfer and turbulent flow in a receiver
tube of solar parabolic trough concentrator with louvered twisted-tape
inserts,” Energy Procedia, vol. 49, pp. 373-380,//2014.
[16] N. Naeeni and M. Yaghoubi, “Analysis of wind flow around a parabolic
collector (1) fluid flow,” Renewable Energy, vol. 32, pp. 1898-1916,
9//2007.
[17] Y.S. Touloukian and D.P. Dewitt, “Thermo physical properties of
matter-the TPRC data series. Volume 7. Thermal Radiative Properties-
Metallic Elements and Alloys,” DTIC Document 1970.
[18] H. Al-Ansary and O. Zeitoun,” numerical study of conduction and
convection heat losses from a half-insulated air-filled annulus of the
receiver of a parabolic trough collector,” Solar Energy, vol. 85, pp.
3036-3045,11//2011.
[19] N. Naeeni and M. Yaghoubi, “Analysis of wind flow around a parabolic
collector (2) heat transfer from receiver tube,” Renewable Energy, vol.
32, pp. 1259-1272, 7//2007.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:71423", author = "O. Afshar", title = "Numerical Investigation of Hot Oil Velocity Effect on Force Heat Convection and Impact of Wind Velocity on Convection Heat Transfer in Receiver Tube of Parabolic Trough Collector System", abstract = "A solar receiver is designed for operation under
extremely uneven heat flux distribution, cyclic weather, and cloud
transient cycle conditions, which can include large thermal stress and
even receiver failure. In this study, the effect of different oil velocity
on convection coefficient factor and impact of wind velocity on local
Nusselt number by Finite Volume Method will be analyzed. This
study is organized to give an overview of the numerical modeling
using a MATLAB software, as an accurate, time efficient and
economical way of analyzing the heat transfer trends over stationary
receiver tube for different Reynolds number. The results reveal when
oil velocity is below 0.33m/s, the value of convection coefficient is
negligible at low temperature. The numerical graphs indicate that
when oil velocity increases up to 1.2 m/s, heat convection coefficient
increases significantly. In fact, a reduction in oil velocity causes a
reduction in heat conduction through the glass envelope. In addition,
the different local Nusselt number is reduced when the wind blows
toward the concave side of the collector and it has a significant effect
on heat losses reduction through the glass envelope.
", keywords = "Receiver tube, heat convection, heat conduction,
Nusselt number.", volume = "9", number = "12", pages = "2070-6", }
