Advertisement

Applied Solar Energy

, Volume 54, Issue 1, pp 40–49 | Cite as

Experimental Study on Performance Enhancement of Evacuated Tube by Constant Heat Flux Mode

  • Ganga Raju Challa
  • M. Natarajan
  • Arjun Palayakkodan
Solar Power Plants and Their Application
  • 29 Downloads

Abstract

The evacuated tube collector with U shape copper absorber tube is considered for the analysis. The experimental investigation is conducted on parabolic trough collector with U shape tube as absorber tube. The effect of the sudden fluctuations in the solar radiation on the performance of the collector is reduced by means of evacuated tube collector filled with thermic fluids. The analysis is performed with different thermic fluids such as dowtherm, therminol66, glycol water and ethylene glycol, are filled in the annular space between inner glass tube and U shape copper absorber tube. The experimentation is carried out at various mass flow rates from 20 to 100 LPH with the step-up flow rate of 20 LPH. A comparative study is carried out on various parameters such as effect of mass flow rate over instantaneous efficiency, useful heat gain and work input, etc. The characteristic curve of cylindrical parabolic trough collector (PTC) is also discussed. Experimental results show that, ethylene glycol gives better efficiency over mass flow rate and therminol66 gives best power heat ratio. Heat transfer mediums and its properties [specific heat capacity, thermal conductivity and dynamic viscosity] for all specified heat transfer fluids are also discussed. The results obtained with various specified heat transfer fluids filled in the annulus space of evacuated tube are compared with plain evacuated tube. It is observed that there is significant enhancement of overall instantaneous collection efficiency of the parabolic trough collector.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Budihardjo, I. and Morrison, G.L., Performance of water-in-glass evacuated tube solar water heaters, Solar Energy, 2009, vol. 83, pp. 49–56.CrossRefGoogle Scholar
  2. 2.
    Daiz, G., Performance analysis and design optimization of a mini-channel evacuated-tube solar collector, in Proceedings of ASME IMECE, 2008, Oct. 31–Nov. 6, Boston, MA, USA.Google Scholar
  3. 3.
    GB 4271–84, Experimental method for the thermal performance of flat solar heater renewable energy policy network for the 21st century, Renewables 2014—Global Status Report, Paris, 2014.Google Scholar
  4. 4.
    Govindaraj Kumaresan, Rahulram Sridhar, and Ramalingon Velraj, Performance studies of a solar parabolic trough collector with a thermal energy storage system, Energy, 2012, vol. 47, pp. 395–402.CrossRefGoogle Scholar
  5. 5.
    Liang Zhang, Zitao, Yu., Liwu Fan, et al., 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, 2013, vol. 57, pp. 262–268.CrossRefGoogle Scholar
  6. 6.
    Ma, L.D., Lu, Zh., Zhang, J., and Liang, R.B., Thermal performance analysis of the glass evacuated tube solar collector with U-tube, Building Environ., 2010, vol. 45, pp. 1959–1967.CrossRefGoogle Scholar
  7. 7.
    Li, M. and Wang, L.L., Investigation of evacuated tube heated by solar trough concentrating system, Energy Conservation Manage., 2006, vol. 47, pp. 3591–3601.CrossRefGoogle Scholar
  8. 8.
    Paulescu, M. et al., Weather modeling and forecasting of PV systems operation, Green Energy Technol. doi 10.1007/978-1-4471-4649-0-2Google Scholar
  9. 9.
    Ma, L.D., Lu, Z., Zhang, J.L., and Liang, R.B., Thermal performance analysis of the glass evacuated tube solar collector with U-tube, Building Environ., 2010, vol. 45, pp. 1959–1967.CrossRefGoogle Scholar
  10. 10.
    Madhulesh Yadav and Saikhedkar, N.K., Simulation modelling for the performance of evacuated tube solar collector, Int. J. Innov. Res. Sci. Eng. Technol., 2017, vol. 6, no. 4, pp. 2319–8753.Google Scholar
  11. 11.
    Brooks, M.J., Mills, I., and Harms, T.M., Performance of a parabolic trough solar collector, J. Energy South. Africa, 2006, vol. 17Google Scholar
  12. 12.
    Morrison, G.L., Budihardjo, I., and Behnia, M., Measurement and simulation of flow rate in a water-in-glass evacuated tube solar water heater, Solar Energy, 2005, vol. 78, pp. 257–267.CrossRefGoogle Scholar
  13. 13.
    Selvakurnar, P., Somasundaram, P., and Thangavel, P., Performance study on evacuated tube solar collector using therminol D-12 as heat transfer fluid coupled with parabolic trough, Energy Convers. Manage., 2014, vol. 85, pp. 505–510.CrossRefGoogle Scholar
  14. 14.
    Thundil Karuppa Raj, R., Tangellapalli Srinivas, Natarajan, M., et al., Experimental and numerical analysis using CFD technique of the performance of the absorber tube of a solar parabolic trough collector with and without insertion, Energy Efficient Technol., 2013, pp. 550–556.Google Scholar
  15. 15.
    Padilla, R.V., Demirkaya, G., Yogi Goswami, D., et al., Heat transfer analysis of parabolic trough solar receiver, Appl. Energy, 2011, vol. 88, pp. 5097–5110.CrossRefGoogle Scholar
  16. 16.
    Liang, R.-b., Ma, L.-d., Zhang, J., and Zhao, L., Theoretical and experimental investigation of the filledtype evacuated tube solar collector with U tube, Solar Energy, 2011, vol. 85, pp. 1735–1744.CrossRefGoogle Scholar
  17. 17.
    Sukhatmae, S.P. and Nayak, J.K., Textbook of Solar Energy (Principles of Thermal Collection and Storage), 3rd ed., New York: McGraw-Hill, 2009.Google Scholar
  18. 18.
    Victor, C., Pigozzo Filho, Alexandre, B., et al., Experimental and numerical analysis of thermal losses of a parabolic trough collector, Energy Proc., 2014, vol.57.Google Scholar
  19. 19.
    Wang Fuqiang, Tan Jianyu, Ma Lanxin, and Wang Chengchao, Effects of glass cover on heat flux distribution for tube receiver with parabolic trough collector system, Energy Convers. Manage., 2015, vol. 90, pp. 47–52.CrossRefGoogle Scholar
  20. 20.
    Gao, Y., Fan, R., Zhang, X.Y., et al., Thermal performance and parameter analysis of a U-pipe evacuated solar tube collector, Solar Energy, 2014, vol. 107, pp. 714–727.CrossRefGoogle Scholar
  21. 21.
    Yan Gao, Qunli Zhang, Rui Fan, et al., Effects of thermal mass and flow rate on forced-circulation solar hotwater system: Comparison of water-in-glass and Upipe evacuated-tube solar collectors, Solar Energy, 2013, vol. 98, pp. 290–301.CrossRefGoogle Scholar
  22. 22.
    Yong Kim and Taebeom Seo, Thermal performances comparisons of the glass evacuated tube solar collectors with shapes of absorber tube, Renewable Energy, 2007, vol. 32, pp. 772–795.CrossRefGoogle Scholar
  23. 23.
    Yu, Z.T., Hu, Y.C., Hong, R.H., and Cen, K.F., Investigation and analysis on a cellular heat pipe flat solar heater, Heat Mass Transfer, 2005, vol. 42, pp. 122–128.CrossRefGoogle Scholar

Copyright information

© Allerton Press, Inc. 2018

Authors and Affiliations

  • Ganga Raju Challa
    • 1
  • M. Natarajan
    • 2
  • Arjun Palayakkodan
    • 3
  1. 1.Department of Thermal and Energy Engineering, School of Mechanical EngineeringVIT UniversityVelloreIndia
  2. 2.Faculty, Department of Thermal and Energy Engineering, School of Mechanical EngineeringVIT UniversityVelloreIndia
  3. 3.Department of Environmental Engineering, School of Civil and Chemical EngineeringVIT UniversityVelloreIndia

Personalised recommendations