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Modelling of the efficiency of the photovoltaic modules: Grid-connected plants to the Cuban national electrical system.

Yhosvany  Soler Castillo's picture
Specialist in Purchase and Sale of Foreign Trade. Tecnomatica

Electrical Engineer. Diplomate in Foreign Trade. Diplomate in Photovoltaic. MSc in Physical Sciences.

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  • Sep 30, 2021
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Photovoltaic power generation capacity is increasing tremendously as a result of strong renewable energy policies
and environmental concerns. In particular, the use of solar modules to generate electricity has grown
significantly in Cuba recently. Based on the statistics published by the European Commission, the installed capacity
of the photovoltaic modules increased from 15 to 100 MW in the timeframe of 2015–2019. In this context,
efficiency is one of the most critical figures of merit of a photovoltaic module. It describes the ratio of the
produced electrical power to the received solar irradiance. In this work, a widely-used model of efficiency is
considered, and the incorporation of the pre-module losses due to light reflections is our original contribution.
Experimental data recorded during eight months in a plant connected to the Cuban National Electric System are
employed to examined and check the proposed approach. Our findings provide a key achievement in the estimation
of the module efficiency within a system. In addition, based on the previous results, we perform a rough
evaluation of the prevision of the photovoltaic system energy production using levelized cost of energy within
the framework of the discounting method, showing a drastic drop by a factor two in the coming two decades.

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Received 8 March 2021; Received in revised form 12 May 2021; Accepted 15 May 2021. Yhosvany Soler-Castillo, Julio César Rimada, Luis Hernández, Gema Martínez-Criado, Modelling of the efficiency of the photovoltaic modules: Grid-connected plants to the Cuban national electrical system. Solar Energy 223 (2021) 150–157. https://doi.org/10.1016/j.solener.2021.05.052.Received 8 March 2021; Received in revised form 12 May 2021; Accepted 15 May 2021. Yhosvany Soler-Castillo, Julio César Rimada, Luis Hernández, Gema Martínez-Criado, Modelling of the efficiency of the photovoltaic modules: Grid-connected plants to the Cuban national electrical system. Solar Energy 223 (2021) 150–157. https://doi.org/10.1016/j.solener.2021.05.052.

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Matt Chester's picture
Matt Chester on Sep 30, 2021

Our findings indicate a drastic cost reduction of PV system by a factor two in the coming two decades.

Do you think this is going to happen regardless of outside policy/market influences, and can those influences be utilized to make that two decades speed up to, say, one decade? 

Yhosvany  Soler Castillo's picture
Yhosvany Soler Castillo on Oct 1, 2021

I totally agree with you, owing to this research was carried out from two years ago, so the current trend which applying the global policies which speed up the devolopment and diployment regarding the PV systems, and in general the Renewables energy; can impell to decrease the LCOE rate of those systems, something extremely favorable for the upcoming future.

Matt Chester's picture
Matt Chester on Oct 1, 2021

Great, thanks for the follow up! This is going to be a fascinating space to watch-- research being two years old is enough for the landscape to have already shifted a lot. So much to keep up with. 

Yhosvany  Soler Castillo's picture
Yhosvany Soler Castillo on Oct 2, 2021

Dear Matt that's exactly, due to the growing rates of the renewables, especifically the photovoltaic, each time the energy output delivered by those systems will be cheaper, which in turn would be traduced on savings in the countries economics resources  and the environmental friendly increase sustainability. Thank for your comments.

Yhosvany  Soler Castillo's picture
Yhosvany Soler Castillo on Oct 1, 2021

I meant, can impel .....Thank for your comments.

Jim Stack's picture
Jim Stack on Oct 1, 2021

YHOSVANY, The panels are also lasting longer as they are also more efficient. My favorite SunPower produce the most with all their inter cell connections placed on the back away from the Suns added heat and providing more PV material to get the full light. They run the coolest and that all add up to more power. 

   Solar hot water is also a great way to use the Suns heat energy. I have both Hot water and Electric Solar at my home to use all that free energy. It provides good jobs and uses no water and that could be another crisis if not watched.  

Yhosvany  Soler Castillo's picture
Yhosvany Soler Castillo on Oct 2, 2021

Dear Jim, nowadays each time PV modules will increase in its energy conversion efficiency, as well as they have longer lifetime. Moreover, as per you commented the impact of operation temperature is critical and crucial for reaching out the best results regarding its efficiency and energy yield, owing to the increase in temperature causes an efficiency behaviour according to a decreasing constant rate, represented by the module temperature coefficient.
In fact the increasing temperature reduces the charge carriers mobilities (i.e. the drift velocity of the minority ones), due to the increase of thermal vibrations of atoms in the semiconductor crystal about a fixed point, which in turn increases the collisions probability with the charge carriers currents. Under these circumstances, the transport phenomenon process sees the incremental temperature gradient, as a perturbing field, which takes the process out of equilibrium, causing a reduction in the performance of PV system.

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Yhosvany Soler Castillo on Oct 2, 2021

Thank for your comments Jim. In the upcoming days, I would like to share my last paper entitle: "Sun’s rays in the PV modules energy yield estimations to improve the energy conversion description", which at this moment is bieng reviewed by editor and referees of a journal; then, according to the process results I'll be able to post it here in order to be commented.

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