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Electric, Heating and Cooling Yields of Solar Collectors for Different Atmospheric Conditions and Tilt Angles

International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Year of Publication: 2016
Hussein M. Taqi Al-Najjar

Hussein Taqi M Al-Najjar. Electric, Heating and Cooling Yields of Solar Collectors for Different Atmospheric Conditions and Tilt Angles. International Journal of Computer Applications 141(10):1-10, May 2016. BibTeX

	author = {Hussein M. Taqi Al-Najjar},
	title = {Electric, Heating and Cooling Yields of Solar Collectors for Different Atmospheric Conditions and Tilt Angles},
	journal = {International Journal of Computer Applications},
	issue_date = {May 2016},
	volume = {141},
	number = {10},
	month = {May},
	year = {2016},
	issn = {0975-8887},
	pages = {1-10},
	numpages = {10},
	url = {},
	doi = {10.5120/ijca2016909805},
	publisher = {Foundation of Computer Science (FCS), NY, USA},
	address = {New York, USA}


In this paper, a study was carried out for the effect of local atmospheric condition and tilt angle on the energy yields of solar collectors at selected latitudes. A computer program was developed for that purpose to find the daily average, monthly, seasonal and annual energy profiles based on Klein model and Erbs correlation. Using generic system of solar collector at due south, hybrid energy yields: electric, heating and cooling were obtained. As a case study, the results were presented for latitudes 30o - 37o N. Optimum tilt angles were found to be within 0o to 66o which nonlinearly depends on the relevant time period of the year and atmospheric condition. Two important findings were concluded. First, optimum angles would be larger for better atmospheric conditions with greater shifts during winter period while summer months are of less sensitivity. This shift was 10o - 14o for winter monthly energy, 0o - 8o for summer monthly energy, 11o - 13o for total annual and heating energy and 1o - 3o for total cooling energy. Second, deviations in the angles of commonly used empirical formulas were noticed to be larger in summer period and higher latitudes. These deviations were in the range of -10o to +20o as compared to the corresponding values of present study. Finally, average energy values were 6055, 1700 and 2370 MJ/m2 for annual, heating and cooling yields respectively.


  1. International Energy Agency, 2014, Technology Roadmap: Solar Photovoltaic Energy.
  2. International Energy Agency, 2014, Technology Roadmap: Solar Thermal Electricity.
  3. International Energy Agency, 2012, Technology Roadmap: Solar Heating and Cooling.
  4. Duffie, J. A. and Beckman, W. A., 2013, Solar Engineering of Thermal Processes, 4th edition, John Wiley and Sons Inc.
  5. Kalogirou, S. A., 2013, Solar Energy Engineering: Processes and Systems, 2nd edition, Elsevier Inc.
  6. Tiwari, G. N. and Dubey, S., 2010, Fundamentals of Photovoltaic Modules and Their Applications, RSC publishing.
  7. Kalogirou, S. A., 2014, Solar Thermal Collectors and Applications, Progress in Energy and Combustion Science 30, 231-295.
  8. Rodriguez-Aumente, P.A., Rodriguez-Hidalgo, M.D.C., Nogueira, J.I., Lecuona, A. and Venegas, M.D.C., 2013, District Heating and Cooling for Business Buildings in Madrid, Applied Thermal Engineering 50 (2), 1496-1503.
  9. Fang, X., and Li, D, 2013, Solar Photovoltaic and Thermal Technology and Applications in China, Renewable and Sustainable Energy Reviews 23, 330-340.
  10. Malogneta, D., Szklo, A., Soria, R., Schaeffer, R., and Borba, B.S.M.C., 2014, Potential and Impacts of Concentrated Solar Power (CSP) Integration in the Brazilian Electric Power System, Renewable Energy 68, 223-235.
  11. Herrando, M., Markides, C. N. and Hellgardt, K., 2014, UK-Based Assessment of Hybrid PV and Solar–Thermal Systems for Domestic Heating and Power: System Performance, Applied Energy 122, 288-309.
  12. Salwan, S. D. and Sopian, K., 2012, Electricity Generation of Hybrid PV/Wind System in Iraq, Renewable Energy 35, 1303-1307.
  13. Ghaith, F. A., and Abu Sitta, R., 2014, Energy Analyses of an Integrated Solar Powered Heating and Cooling Systems in UAE, Energy and Buildings 70, 117-126.
  14. Fasfous, A., Asfar, J., Al-Salaymeh, A., Sakhrieh, A., Al-hamamre, Z., Al-bawwab, A. and Hamdan, M., 2013, Potential of Utilizing Solar Cooling in the University of Jordan, Energy Conversion and Management 65, 729-735.
  15. REN21, 2014, Renewables 2014: Global Status Report.
  17. Ahmed, N., Sheikh, A. K., Gandhidasan, P. and Elshafie, E., 2015, Modeling, Simulation and Performance Evaluation of a Community Scale PVRO Water Desalination System Operated by Fixed and Tracking PV Panels: A Case Study for Dhahran City, Saudi Arabia, Renewable Energy 75, 433-447.
  18. Skeiker, K., 2009, Optimum Tilt Angle and Orientation for Solar Collectors in Syria, Energy Conversion and Management 50 (9) 2439-2448.
  19. Al-Najjar, H. M. T., 2015, Study of Energy Gains by Orientation of Solar Collectors in Baghdad City, Journal of Engineering , Vol.21, No.10.
  20. Al Tarabsheh, A., Etier, I. and Nimrat, A., 2012, Energy Yield of Tracking PV Systems in Jordan, International Journal of Photoenergy, Vol.2012, Article ID890183, 5 pages.
  21. Khorasanizadeh, H., Mohammadi, K. and Mostafaeipour, A., 2014, Establishing a Diffuse Solar Radiation Model for Determining the Optimum Tilt Angle of Solar Surfaces in Tabass, Iran, Energy Conversion and Management 78, 805-814.
  22. Eke, R. and Senturk, A., 2012, Performance Comparison of a Double-Axis Sun Tracking Versus Fixed PV System, Solar Energy 86, 2665-2672.
  23. Li, Z., Liu, X. and Tang, R., 2010, Optical Performance of Inclined South-North Single Axis Tracked Solar Panels, Energy 35 (6), 2511-2516.
  24. Huld, T., Cebecauer, T., Suri, M. and Dunlop, E., 2010, Analysis of One Axis Tracking Strategies for PV Systems in Europe, Progress in Photovoltaics: Research and Applications 18 (3), 183-194.
  25. Christensen, C.B and Barker, G.M, 2001, Effects of Tilt and Azimuth on Annual Incident Solar Radiation for United States Location. In Proc. solar forum: solar energy: the power to choose, Washington, DC, April 21-25.
  26. Lubitz, W. D., 2011, Effect of Manual Tilt Adjustments on Incident Irradiance on Fixed and Tracking Solar Panels, Applied Energy 88, 1710-1719.
  27. Nijegorodov, N., Devan, K.R.S., Jain, P.K. and Carlsson, S., 1994, Atmospheric Transmittance Models and An Analytical Method to Predict the Optimum Slope of An Absorber Plate, Variously Orientated at Any Latitude, Renewable Energy 4, 529-543.


solar collector, energy profile, electric heating cooling yields, atmospheric condition, optimum tilt angle.