Temat: PV performance - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Performance Enhancement of a Photovoltaic Module by Passive Cooling Using Water-Based Aluminum Oxide Nano-Fluid
Autorzy:: Hamdan, Mohammad A.
Tematy:: PV cooling
nanotechnology
PV performance
fined PV; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/2086398.pdf Link otwiera się w nowym oknie
Opis:: The performance of a PV (photovoltaic) module relies heavily on the operating temperature. The aim of the current study was to improve PV performance by passive cooling with nano-coated aluminum fins attached to the backside of the photovoltaic panels. Four identical PV panels were installed side by side for simultaneous measurements. The first one (B) is a basic PV that was used for comparison purposes, the second one (N) PV, which is coated with water-based Al2O3 nano-fluid, the third is finned PV (F), with fins being attached to its backside and the Al2O3 nano-fluid coated fins are attached to the backside of the fourth PV (FN). The hourly electrical generated power by each PV, I-V, and I_V curves for each PV were recorded and stored using I-V Checker. In addition, the backside temperature of each PV and the ambient temperature were measured on an hourly basis using K-type thermocouples; the measured temperature values were stored in a data logger. It was found that the (FN) PV gave the best performance compared to the base unit, with an increase in the generated power by 5.77%, followed by the nanocoated (N) PV with an increase of 2.14% and finally the finned (F) PV with an increase of 0.74%. Furthermore, the PV with the nano-coated fins exhibits the lower temperature 31°C, followed by the nano-coated PV, and finally the fined PV, with the backside average temperature of the basic unit being 39°C.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Heat pipe-cooled highly-concentrated multi-junction solar cell
Autorzy:: Turkestani, Mohammed Al
Sabry, Mohamed
Lashin, Abdelrahman
Tematy:: solar cell
concentrator photovoltaics
heat pipe
passive cooling
PV performance; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Powiązania:: https://bibliotekanauki.pl/articles/59112945.pdf Link otwiera się w nowym oknie
Opis:: Concentrator photovoltaic (CPV) systems have proven the capability of competing with traditional photovoltaic (PV) systems due to their high efficiency and low area occupancy. Such CPV systems require efficient heat removal auxiliary systems, especially for medium and high optical concentration ratios. Operating a CPV system under a high optical concentration (ratio > 200 X) might require active cooling techniques, which have high operating costs and maintenance. On the other hand, heat pipes (HPs) are widely used in electronic devices for cooling purposes. This work discusses the possibility of operating a CPV system coupled with HPs as a passive cooling technique. Two different HPs with different lengths are used to compare cooling efficiency. Each HP length was tested either in a single or double configuration. Long HPs showed better heat removal compared to a traditional fin-cooling system. CVP cooling with HP systems enhanced the entire electrical output of the cell, mainly at high optical concentration ratios.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Techno-economic PV evaluation depending on surface water cooling
Ocena techniczno-ekonomiczna PV w zależności od chłodzenia wodą powierzchniową
Autorzy:: Shaaban, Abdullah M.A.
El-Samahy, Adel A.
Abed, Kamal A.
Mosa, Magdi A.
Tematy:: solar energy
photovoltaics
PV surface cooling
water cooling
PV performance
energia słoneczna
fotowoltaika
chłodzenie powierzchni PV
chłodzenie wodne
wydajność PV; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Powiązania:: https://bibliotekanauki.pl/articles/59112350.pdf Link otwiera się w nowym oknie
Opis:: 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.
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.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Wpływ temperatury na pracę ogniwa słonecznego
Autorzy:: Gąska, Aleksandra
Malinowska, Wiktoria
Sieńko, Mikołaj
Popławski, Łukasz
Tematy:: temperature
photovoltaic
performance of pv systems; Pokaż więcej
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Powiązania:: https://bibliotekanauki.pl/chapters/60553505.pdf Link otwiera się w nowym oknie
Opis:: The article explains the problem of converting solar energy to electricity in the photovoltaic effect and discusses the characteristics of the performance of a solar cell. The focus was on the effect of temperature on the performance of the cell. Analysis of the data showed the negative influence of an increase in temperature on cell performance. The observed voltage drop significantly reduces the efficiency and accelerated degradation of photovoltaic cells. Methods for their cooling were considered and new generations of cells were described, as well as innovative technologies that reduce the impact of high temperatures on the PV module’s efficiency.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: The effects of climate change on photovoltaic solar production in hot regions
Autorzy:: Al-Baghdadi, Maher A. R. Sadiq
Ridha, Amel A.
Al-Khayyat, Ali Salam
Tematy:: PV cell temperature
PV cell performance
climate change
hot regions
two axis tracking
energia słoneczna
fotowoltaika
zmiana klimatu
dwuosiowy system nadążający; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Powiązania:: https://bibliotekanauki.pl/articles/2096200.pdf Link otwiera się w nowym oknie
Opis:: The work of solar cells and their production of electrical energy have been affected by climate change, especially in hot regions which became significantly hotter and still receive relatively high levels of solar radiation throughout the year. Higher ambient temperature and solar radiation result in higher PV cell temperature and, therefore, the reduction in PV module power output and efficiency. This study investigates how a PV module performs throughout the year in a hot region by considering the variations in cell temperature resulting from changes in ambient temperature and solar radiation every day. The tilt angles and two-axis tracking have also been examined. Results indicate that the two-axis solar tracking system is critical to use in hot regions for obtaining higher output power. Therefore, part of this power can be used to cool solar panels using various methods to keep their efficiency high, such as operating air fans or operating pumps to cool them with coolant.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Evaluation of degradation factor effect on solar panels performance after eight years of life operation
Autorzy:: Obaid, Ali Hussein
Mahdi, Emad Jaleel
Hassoon, Isam Azeez
Hussein, Hussein Fawzi
Adil Abd Al-Sahib, Adil Abd Al-Sahib
Jafarf, Ammar Noori
Abdulghanig, Ali Sabih
Tematy:: solar panel performance
evaluation of PV
PV operational life
panel degradation rate; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/59877379.pdf Link otwiera się w nowym oknie
Opis:: Most high-quality solar panel products suffer from performance degradation at an annual rate of 0.4–0.5% per year during their specified normal operational life of 25–30 years. This percentage increases in areas with hot climates and roof photovoltaic systems and varies according to the quality, guarantee and reliability of the solar panel manufacturers. The aim of this research is to assess the degradation rates of solar panels in the city of Baghdad and to determine their impact on the investment feasibility of residential systems under hot climatic conditions. In this research, an evaluation of performance of photovoltaic solar panels working in a 2 kWp system connected to the electrical grid was done under the operational climatic conditions in the evaluation area (Baghdad, Iraq). The degradation rate of all photovoltaic system modules during the operation time from 2015–2023 is equal to 4.74% (0.593% / year). For comparison, a new monocrystalline solar panel of power 185.94 Wp with an old solar panel of monocrystalline type of power 183.33 Wp (which previously was installed in 2015) were installed at the same tilt angle of 30o , and evaluated during the operation months starting in March and ending in November of the year 2023. The degradation rates per year of an aged solar panel were determined to range from 0.441% to 0.850%, with an average value of 0.788% per year. After undergoing a correction process to align the maximum power values of the old and new solar panels, the corrected degradation rates per year values ranged from 0.391% to 0.684% per year, with an average value of 0.621% per year, which closely matches the degradation rate of all photovoltaic system modules at 0.593% per year.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Cooling techniques for PV panels: A review
Autorzy:: Kozak-Jagieła, Ewa
Cisek, Piotr
Ocłoń, Paweł
Tematy:: PV cooling methods
solar energy
photovoltaics cooling efficiency enhancement
performance
PV/T
metody chłodzenia paneli fotowoltaicznych
energia słoneczna
zwiększenie wydajności chłodzenia
wydajność; Pokaż więcej
Wydawca:: Radomskie Towarzystwo Naukowe
Powiązania:: https://bibliotekanauki.pl/articles/35126202.pdf Link otwiera się w nowym oknie
Opis:: Solar energy is considered one of the most dominant renewable energy sources. It can be used to produce electricity through PV panels. Unfortunatly, this technology is subject to limitations. High operating temperature exceeding 25°C, causes the PV panels to overheat, reducing their lifetime and efficiency. Various approaches to PV cooling are used to overcome these challenges.This paper presents a comprehensive overview of different cooling techniques to increase the performance of PV panels. Passive and active PV cooling systems are analysed using air, water, phase change materials (PCMs) and nanofluids as working agents. A review analysis showed that water cooling is better than air cooling. PCMs, which have recently been gaining in popularity, also deserve attention.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Experimental performance characterization and economic efficiency of 16.28 kWp grid-tied PV systems in semi-arid climate
Autorzy:: Khennane, Messaouda Benbitour
Boughali, Slimane
Bechki, Djamel
Zaghba, Layachi
Fezzani, Amor
Mahammed, Idriss Hadj
Tematy:: grid connected PV system
performance evaluation
sandstorm
Saharan environment
economic benefits
system fotowoltaiczny
ocena wydajności
korzyści ekonomiczne
Sahara; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Powiązania:: https://bibliotekanauki.pl/articles/1840902.pdf Link otwiera się w nowym oknie
Opis:: The study of the paper aims to present a solar power plant performances and economic benefits of 16.28 kWp grid-tied solar PV systems under the real outdoor conditions of Ghardaïa, located in semi-arid area of the Algeria desert. The main goal of this study is to investigate the effectiveness, suitability, feasibility and reliably of these plants on the level of desert areas and under the influence of harsh conditions (desert environment) in the first part. In the second part, the contribution of solar PV plant to conventional networks in the arid and semi-arid environment to assess the rate of integration. Based on experimental measurement data, the paper also shows economic benefits of three photovoltaic plants. It was found that from the first January to last August 2019, the total produced energy by all PV arrays was 171.422 MWh which supplied to the internal grid and while, the consumed energy by the URAER unit was 159,094 kWh. Approximately 10, 95 % of the 159,094 MWh energy consumed in the whole year is provided from the generated PV solar energy that is 17,422 MWh. The total energy fed to the internal grid has grown from 27 MWh in 05/04/2018 to a maximum of 67.28 MWh recorded in 31/10/2019. The rate of integration of solar energy by all PV arrays in the internal network of the URAER varied between 6, 60% in January and 22, 96% in April. The integration of this renewable energy generation into the local grid in the URAER unit considered satisfactory over this period of operation. From the first January to last August 2019, the cost of electrical energy produced by solar plants is 2090,64 euro(277706,68 Algerian dinars) while the cost of energy consumed by the Applied Research Unit in renewable energies is 4772,82 euro(664853,826 Algerian dinars).
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Energy and environmental performance analysis of grid-connected photovoltaic systems under similar outdoor conditions in the Saharan environment
Autorzy:: Deriche, Mohammed Amine
Hafaifa, Ahmed
Tahri, Ali
Mohammedi, Kamal
Tahri, Fatima
Tematy:: performance assessment
Saharan outdoor conditions
grid-connected PV
thin film photovoltaic modules
energy payback
greenhouse gases emissions
system fotowoltaiczny
energia
emisja gazów cieplarnianych
ocena wydajności
Sahara; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Powiązania:: https://bibliotekanauki.pl/articles/328057.pdf Link otwiera się w nowym oknie
Opis:: The aim of this paper is to present a one-year performance analysis of four grid-connected PV systems installed at Ghardaia city in Algeria’s Sahara. The grid-connected PV systems are based on four different PV module technologies which are: monocrystalline silicon (m-Si), multi-crystalline silicon (mc-Si), cadmium telluride (Cd-Te) and amorphous (a-Si) PV module technologies. The PV systems based on the thin film technologies have their performance ratio better throughout the year when the performance ratio of the mc-Si technology is better in the winter season. The a-Si PV system has its performance ratio about 6.13 % more better than mc-Si and 8.90 % better than m-Si. The AC energy produced with the a-Si PV system is 13.32 % more than what the mc-Si system produces. It was found that the a-Si PV system performs better than the other technologies under the Saharan climate conditions of Ghardaia city. The energy payback time (EPBT) and greenhouse gases (GHG) emissions of the different PV systems were analyzed. The EPBT and GHG emissions per year, vary from a minimum value of 2.8 years to a maximum value of 5.73 years and from 13.24 tons to 32.03 tons of CO2/kWh for CdTe and m-Si respectively. The CdTe PV system performs better in terms of EPBT and GHG emissions compared to the other technologies (m-Si, mc-Si and a-Si) due to its low life cycle energy requirement.
Dostawca treści:: Biblioteka Nauki

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