Theoretical and experimental investigation into incident radiation on solar conical collector

Document Type: Research Paper

Authors

1 Mechanical Engineering Department, Faculty of Engineering, Shahid Chamran University, Ahvaz, Iran

2 Faculty of Mechanical Engineering, K. N. Toosi University of Technology, Tehran, Iran

Abstract

The geometry of a collector is one of the important factors that can increase the incident radiation on the collector surface. In the present study, the incident radiation for a stationary collector with cone geometry, i.e. a conical collector, is theoretically and experimentally investigated. This type of collector is always stable and does not need a fixture to install. Moreover, it has a symmetric geometry, with all its sides facing the sun. The main advantage of this collector is its ability to receive beam, diffuse, and ground-reflected radiation throughout the day. The variation of the incident radiation is theoretically estimated by using an isotropic sky model based on the available data. The theoretical data are validated by an experimental test of a conical collector of a specific size. The results show that the conical solar collector is more operative in receiving total solar radiations than a horizontal plate such as a flat-plate collector and can be a suitable option for solar water heating. A calculation of the incident radiation shows that the incident radiation is maximized when the cone angle of the conical collector is equal to the latitude of the site test.

Keywords


[1] Kalogirou S., Solar Thermal Collectors and Applications, Prog Energy Combust Sci, 30: 231-295.

[2] Duffie J.A, Beckman W.A., Solar Engineering of Thermal Processes, 4nd ed, New York, Wiley (2013).

[3] Motte F., Notton G., Cristofari C., Canaletti J., Design and Modeling of a New Patented Thermal Solar Collector with Building Integration, Appl Energy (2013) 102: 631-639.

[4]Katiyar A.K., Kumar A., Pandey CK., Katiyar VK., Abdi SH., Correlations for the Estimation of Monthly Mean Hourly Diffuse Solar Radiation, a Time Dependent Approach, The International Journal of Energy and Environment. (2010) 1(5):833-40.

[5] Karsli S., Performance Analysis of a New-Design Solar Air Collector for Drying Applications, Renew Energy (2007) 32:1645-1660.

[6] Samanta B., Khamis Rajab AI Balushi. Estimation of Incident Radiation on a Novel Spherical Solar Collector, Renew Energy (1998) 14: 241-247.

[7] Al-Sulaiman F.A, Ismaili B., Estimation of Solar Radiation Impinging on a Sloped Surface Using Isotropic Sky Model for Dhahran, Saudi Arabia, Renew Energy (1997)11: 257-262.

[8] Pelece I., Iljins U., Ziemelis I., Theoretical Calculation of Energy Received by Semi-Spherical Solar Collector, Argon, Res (2008) 6: 263-269.

[9] Pelece I., Ziemelis I., Iljins U., Surface Temperature Distribution and Energy Gain from Semi-Spherical Solar Collector.  Proceeding of World Renewable Energy Congress, Linkoping, Sweden (2011) 3913-3920.

[10] Gaspar F., Balan M., Jantschi L., Ros V., Evaluation of Global Solar Radiation Received by a Spherical Collector. Bulletin UASVM Agriculture (2012) 69: 128-135.

[11] Kumar N., Chavda T., Mistry H. N., A Truncated Pyramid Non Tracking Type Multipurpose Solar Cooker/hot Water System, Applied Energy (2010) 87: 471-477.

[12] Tian Y., Zhao C. Y., A Review of Solar Collectors and Thermal Energy Storage in Solar Thermal Applications, Applied Energy (2013) 104: 538-553.

[13]Bannerot R. B, Howell J. R., Predicted Daily and Yearly Average Radiation Performance of Optimal Trapezoidal Groove Solar Energy Collectors. Solar Energy (1979) 22: 229.

[14] Smyth M., Zacharopoulos A., Eames P. C., Norton B., An Experimental Procedure to Determine Solar Energy Flux Distributions on the Absorber of Line-Axis Compound Parabolic Concentrators, Renew Energy (1999) 16: 761-764.

[15] Erbs D. G., Klein S. A., Duffie J. A., Estimation of the Diffuse Radiation Fraction for Hourly, Daily and Monthly-Average Global Radiation, Solar Energy (1982) 28: 293.

[16] Gueymard C., Interdisciplinary Applications of a Versatile Spectral Solar Irradiance Model, a Review, Energy (2005) 30: 1551.

[17] Hay J. E., McKay D. C., Estimating Solar Irradiance on Inclined Surfaces, a Review and Assessment Methodologies. Intertional Journal Solar Energy (1985) 3: 203.

[18] Hottel H. C., A Simple Model for Estimating the Transmittance of Direct Solar Radiation Through Clear Atmospheres. Solar Energy (1976) 18: 129.

[19]Souliotis M., Tripanagnostopoulos Y., Study of the Distribution of the Absorbed Solar Radiation on Theperformance of a CPC-type ICS Water Heater, Renew Energy (2008) 33:846–858.

[20]Klein S. A., Theilacker J. C., An Algorithm for Calculation Monthly-Average Radiation on Inclined Surfaces. ASME Journal Solar Energy Engineering (1981) 103: 29.

[21] Knight K. M., Klein S. A., Duffie J. A., A Methodology for Synthesis Hourly Weather Data, Solar Energy (1991) 46: 109.

[22] Perez R., Ineichen P., Seals R., Michalsky J., Stewart R., Modeling Daylight Availability and Irradiance Components   from Direct and Global Irradiance, Solar Energy (1990) 44: 271-289.

[23] Skartveit A., Olseth J. A., A Model for Diffuse Fraction of Hourly Global Radiation, Solar Energy (1987) 38: 271-274.

[24] Soulayman S. SH., On the Optimum Tilt of Solar Absorber Plates, Renew Energy (1991) 1: 551-554.

[25] Morcos V. H., Optimum Tilt Angle and Orientation for Solar Collectors  in Assiut, Egypt,  Renew  Energy (1994) 4: 191-202.