An Experimental Study of Combining a Photovoltaic System with a Heating System

R. Hosseini
Amirkabir University of Technology (Tehran PolyTechnic), Tehran, Iran

N. Hosseini
University of Kashan, Kashan, Iran

H. Khorasanizadeh
University of Kashan, Kashan, Iran

Ladda ner artikelhttp://dx.doi.org/10.3384/ecp110572993

Ingår i: World Renewable Energy Congress - Sweden; 8-13 May; 2011; Linköping; Sweden

Linköping Electronic Conference Proceedings 57:40, s. 2993-3000

Visa mer +

Publicerad: 2011-11-03

ISBN: 978-91-7393-070-3

ISSN: 1650-3686 (tryckt), 1650-3740 (online)


Solar photovoltaic and thermal systems are potential solutions for current energy needs. One of the most important difficulties in using photovoltaic systems is the low energy conversion efficiency of PV cells and; furthermore; this efficiency decreases further during the operational period by increasing the cells temperature above a certain limit. In addition; reflection of the sun’s irradiance from the panel typically reduces the electrical yield of PV modules by 8-15%. To increase the efficiency of PV systems one way is cooling them during operation period. In this experimental study combination of a PV system cooled by a thin film of water with an additional system to use the heat transferred to the water has been considered. Experimental measurements for both combined system and conventional panel indicate that the temperature of the photovoltaic panel for combined system is lower compared to the conventional panel. The results show that the power and the electrical efficiency of the combined system are higher than the traditional one. Also since the heat removed from the PV panel by water film is not wasted; the overall efficiency of the combined system is higher than the conventional system.


Cooling PV systems; Electrical efficiency; Combined system; Overall efficiency


[1] E.C. Kern and M.C. Russel; Combined photovoltaic and thermal hybrid collector systems; Proceedings of the 13th IEEE Photovoltaic Specialists; 1978; pp. 1153–1157.

[2] S.D. Hendrie; Evaluation of combined photovoltaic/thermal collectors; Proceedings of international ISES Conference; 1979; pp. 1865–1869.

[3] L.W. Florschuetz; Extension of the Hottel-Whillier model to the analysis of combined photovoltaic/thermal flat plate collectors; Journal of Solar Energy 22; 1979; pp. 361–366. doi: 10.1016/0038-092X(79)90190-7.

[4] P. Raghuraman; Analytical predictions of liquid and air photovoltaic/thermal; flat-plate collector performance; Journal of Solar Energy Engineering 103; 1981; pp. 291–298. doi: 10.1115/1.3266256.

[5] C. H. Cox and P. Raghuraman; Design considerations for flat-plate photovoltaic/thermal collectors; Journal of Solar Energy 35; 1985; pp. 227–241. doi: 10.1016/0038-092X(85)90102-1.

[6] Y. Tripanagnostopoulos; Hybrid Photovoltaic/Thermal Systems; Journal of Solar Energy 72; 2002; pp. 217–234. doi: 10.1016/S0038-092X(01)00096-2.

[7] S.A. Kalogirou and Y. Tripanagnostopoulos; Industrial application of PV/T solar energy systems; Journal of Energy Conversion and Management 47; 2006; pp. 3368–3382. doi: 10.1016/j.enconman.2006.01.012.

[8] S. Krauter; Increased electrical yield via water flow over the front of photovoltaic panels; Journal of Solar Energy Materials & Solar Cells 82; 2004; pp. 131–137. doi: 10.1016/j.solmat.2004.01.011.

[9] M. Abdolzadeh and M. Ameri; Improving the effectiveness of a photovoltaic water pumping system by spraying water over the front of photovoltaic cells; Journal of Renewable Energy 34; 2009; pp. 91–96. doi: 10.1016/j.renene.2008.03.024.

[10] A. Kordzadeh; The effects of nominal power of array and system head on the operation of photovoltaic water pumping set with array surface covered by a film of water; Journal of Renewable Energy 35; 2010; pp. 1098–1102. doi: 10.1016/j.renene.2009.10.024.

Citeringar i Crossref