ORIGINAL PAPER
Techno-economic PV evaluation depending on surface water cooling
1
Mechanical Engineering Department, National Research Centre (NRC), Egypt
2
Electrical Power and Machines Department, Faculty of Engineering, Helwan University, Egypt
Submission date: 2024-02-06
Final revision date: 2024-05-08
Acceptance date: 2024-05-09
Publication date: 2024-09-24
Corresponding author
Polityka Energetyczna – Energy Policy Journal 2024;27(3):53-70
KEYWORDS
TOPICS
ABSTRACT
Solar energy is one of the most important renewable energy sources and it can be exploited to produce electrical energy through photovoltaic (PV) panels. PV panels are affected by several factors, the most important being the panel temperature, which greatly affects the performance and efficiency of the PV. This paper investigates the effect of water-based surface cooling on the PV performance. Techno-economic PV evaluation depending on surface water cooling was examined. The effect of changing the water flow rate on the panel temperature was studied. The proposed system studied the effect of using variable water flow rates (1.25, 5, 7 L/min) on the panel temperature. A 260 W poly-crystalline PV panel combined with a water cooling system was examined experimentally. The PV panel temperature, open circuit voltage, short circuit current and output power were measured before and after cooling at variable flow rates. A PV panel analyzer I-V400 was used to test the panel in order to draw the IV and power curves. It was found that the rate of decrease in panel temperature with time is almost constant for all cases. Increasing the rate of water flow on the panel surface did not affect the rate of its temperature decrease with time. With the proposed surface cooling technique, the panel temperature decreased from 62.4 to 37.6oC. PV output power increased from 182.65 to 214.62W, with an improvement of around 18%. The amount of energy gained as a result of cooling saves around 0.7USD for one panel per year.
METADATA IN OTHER LANGUAGES:
Polish
Ocena techniczno-ekonomiczna PV w zależności od chłodzenia wodą powierzchniową
energia słoneczna, fotowoltaika, chłodzenie powierzchni PV, chłodzenie wodne, wydajność PV
Energia słoneczna jest jednym z najważniejszych odnawialnych źródeł energii i może być wykorzystywana do produkcji energii elektrycznej za pomocą paneli fotowoltaicznych (PV). Na panele PV wpływa kilka czynników, z których najważniejszym jest temperatura panelu, która w znacznym stopniu wpływa na wydajność i sprawność PV. W niniejszym artykule zbadano wpływ chłodzenia powierzchniowego na bazie wody na wydajność PV. Przebadano techniczno-ekonomiczną ocenę PV w zależności od chłodzenia wodą powierzchniową. Przebadano wpływ zmiany szybkości przepływu wody na temperaturę panelu. Proponowany system zbadał wpływ stosowania zmiennych szybkości przepływu wody (1,25, 5, 7 l/min) na temperaturę panelu. Eksperymentalnie zbadano polikrystaliczny panel PV o mocy 260 W połączony z systemem chłodzenia wodą. Temperaturę panelu PV, napięcie obwodu otwartego, prąd zwarcia i moc wyjściową mierzono przed i po schłodzeniu przy zmiennych szybkościach przepływu. Do przetestowania panelu w celu narysowania krzywych IV i mocy użyto analizatora paneli PV I-V400. Stwierdzono, że szybkość spadku temperatury panelu w czasie jest prawie stała we wszystkich przypadkach. Zwiększenie szybkości przepływu wody na powierzchni panelu nie wpłynęło na szybkość spadku jego temperatury w czasie. Dzięki proponowanej technice chłodzenia powierzchni, temperatura panelu spadła z 62,4 do 37,6°C. Moc wyjściowa PV wzrosła z 182,65 do 214,62 W, co stanowi poprawę o około 18%. Ilość energii uzyskanej w wyniku chłodzenia pozwala zaoszczędzić około 0,7 USD na jeden panel rocznie.
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