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Diseño y optimización de plantas solares FV en diferentes latitudes de méxico
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Abstract(s)
RESUMEN: En este estudio se compara el rendimiento de tres configuraciones geométricas: Estructura Fija y Seguidores de un eje “1X” y de dos ejes “2X” para 12 sitios de distintas latitudes en los Estados Unidos Mexicanos, desde 16.85ºN a 31.66ºN. Para cada configuración geométrica y latitud se obtiene la producción específica final Yf en función del Ratio de Ocupación GCR (Ground Cover Ratio). A su vez, para cualquier GCR, se optimiza el ángulo de inclinación "β" en Estructura Fija y el GCRNS direccional (en dirección Norte-Sur) en el caso del seguidor de dos ejes. Con respecto a la Estructura Fija y para sitios con baja fracción difusa, se observa que el Seguidor 1X tiene una ganancia que oscila entre el 23,03% y el 24,04% con la latitud, mientras que el Seguidor 2X tiene ganancia más pronunciada, desde el 30,96% hasta el 36,04%. En los sitios con una fracción de difusa similar, la ganancia del Seguidor 2X con respecto al Seguidor 1X aumenta con la latitud, de 5,58% (latitudes bajas) a 10,33% (latitudes altas). Cuanto menor sea la fracción de difusa, más adecuado será apuntar al sol; cuanto mayor es la fracción de difusa, más apropiado apuntar al cenit.
ABSTRACT: This study compares the performance of three geometric configurations: Fixed Structure, one-axis and two-axis trackers for 12 sites at different latitudes in Mexican United States, ranging from 16.85ºN to 31.66ºN. For each geometric configuration and latitude, the final specific production Yf is obtained as a function of Ground Cover Ratio GCR. In turn, for any GCR, the inclination angle "β" is optimized for Fixed Structure, and the directional GCRNS (in the North-South direction) for two-axis tracker. Compared to Fixed Structure, and for sites with low diffuse fraction, it is observed that one-axis tracker has a little gain change with latitude, between 23.03% and 24.04%, while two-axes tracker has more noticeable gain change, ranging from 30.96% to 36.04%. At sites with a similar diffuse fraction, the gain of two-axis tracker relative to one-axis increases with latitude, from 5.58% (low latitudes) to 10.33% (high latitudes). The smaller the diffuse fraction, the more suitable will be pointing at the sun, the greater the diffuse fraction, the more appropriate pointing at the zenith.
ABSTRACT: This study compares the performance of three geometric configurations: Fixed Structure, one-axis and two-axis trackers for 12 sites at different latitudes in Mexican United States, ranging from 16.85ºN to 31.66ºN. For each geometric configuration and latitude, the final specific production Yf is obtained as a function of Ground Cover Ratio GCR. In turn, for any GCR, the inclination angle "β" is optimized for Fixed Structure, and the directional GCRNS (in the North-South direction) for two-axis tracker. Compared to Fixed Structure, and for sites with low diffuse fraction, it is observed that one-axis tracker has a little gain change with latitude, between 23.03% and 24.04%, while two-axes tracker has more noticeable gain change, ranging from 30.96% to 36.04%. At sites with a similar diffuse fraction, the gain of two-axis tracker relative to one-axis increases with latitude, from 5.58% (low latitudes) to 10.33% (high latitudes). The smaller the diffuse fraction, the more suitable will be pointing at the sun, the greater the diffuse fraction, the more appropriate pointing at the zenith.
Description
CIES2020 - XVII Congresso Ibérico e XIII Congresso Ibero-americano de Energia Solar
Keywords
Solar energy Photovoltaic systems Diffuse fraction
Citation
Zeaiter, Z.H... [et.al.] - Diseño y optimización de plantas solares FV en diferentes latitudes de méxico. In: CIES2020: As Energias Renováveis na Transição Energética: Livro de Comunicações do XVII Congresso Ibérico e XIII Congresso Ibero-americano de Energia Solar. Helder Gonçalves, Manuel Romero (Ed.). Lisboa, Portugal: LNEG, 3-5 Novembro, 2020, p. 255-262
Publisher
LNEG - Laboratório Nacional de Energia e Geologia