Theoretical analysis of reservoir-based floating photovoltaic plant for 15-khordad dam in Delijan


1 Department of Energy, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129, Turin, Italy

2 Department of Mechanical Engineering, Mazandaran University of Science and Technology, Babol, Iran

3 Mechanical Engineering Faculty, Energy Systems Group, KNToosi University of Technology, Tehran, Iran


The current study presents the design features and photovoltaic requirements of a floating photovoltaic plant (FPVP) whose purpose is to reduce the evaporation from the surface of a water reservoir while generating electricity. A summary of the energy budget method is also introduced to calculate the rate of evaporation from the water reservoir behind 15-Khordad dam. The top of the reservoir has a surface area about 1.59 km2 but only 2% of it has been covered with the proposed FPVP with a stated capacity of 1.45 MWdc. The study proves that covering even a small percentage of the reservoir’s surface has a significant effect on the amount of water saved annually. Finally, the average water saved monthly due to FPVP, the electricity generated by the system in the first year, and the CO2 balance of the facility are calculated based on meteorological data of Delijan.


[1]  Based on IEA Data from [CO2 Emissions from Fuel Combustion] © OECD/IEA[2016],,Licence:
[2]  Immerzeel W.W., Droogers P., Terink W., Hoogeveen J., Hellegers P., Bierkens M., Van Beek R., Middle-East and Northern Africa Water Outlook. World Bank Study, FutureWater Report 98(2011).
[3]  Arun Kumar V., Rashmitha M., Naresh B., Bangararaju J., Rajagopal V., Performance Analysis of Different Photovoltaic Technologies. In, Proceedings of the 2013 International Conference on Advanced Electronic Systems(ICAES) (2013) 978-14799–1441-8/13/$31.00 © IEEE.
[4] Ferrer-Gisbert C., Ferrán-Gozálvez J., Redón-Santafé M., Ferrer-Gisbert P., Sánchez-Romero F.J., A New Photovoltaic Floating Cover System for Water Reservoirs, Renewable Energy (2013) 60:63-70.
[5] Trapani K., Millar Dean L., Smith H., Novel Offshore Application of Photovoltaic in Comparison to Conventional Marine Renewable Energy Technologies, Renewable Energy (2013)50:879-888.
[6] Finch J., Calver A., Methods for the Quantification of Evaporation from Lakes, Oxfordshire,OX10 8BB UK (2008).
[7] Lewis J. M., The Story Behind the Bowen Ratio, National Severe Storms Laboratory, Norman, Oklahoma (1995) 76(12).
[8] Henderson-Sellers B., Calculating the Surface Energy Balance for Lake and Reservoir Modeling, A Review, Reviews of Geophysics (AN AGU JOURNAL) (1986) 24(3): 625–649.
[9] Based on IEA Data from [CO2 Emissions from Fuel Combustion] © OECD/IEA[2009],, Licence:
[10] Trapani K., Dean L., Proposing Offshore Photovoltaic (PV) Technology to the Energy Mix of the Maltese Islands, Energy Convers Manage (2013)67:18-26.