Shadowing Practice: Understanding Height and Clearance: Critical Design Parameters for Utility-Scale Solar Racking - Learn English Speaking with Video
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Let's examine another key term in the design parameters for the racking, and that is minimum clearance and maximum height.
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You can see here what those parameters look like for each of our two main racking types.
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With fixed tilt, it's a pretty easy concept to grasp since everything stays put.
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For tracker systems, however, you have a moving part
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which both decreases the clearance and increases the system height as it moves throughout its daily cycle.
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So now you'll need to factor in the height of the system at its maximum rotation or height.
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One key way that ground clearance and maximum height are varied or adjusted is by changing what's called post reveal.
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Reveal is the distance from the ground to the top of the post, and it's a key consideration for racking design.
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Let's start with clearance.
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Typically, the minimum clearance will be determined by the project owner if they have a technical specification.
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And then designers also need to look at maximum snow depths
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and vegetation control plans to determine how much clearance the racking needs to maintain above grade at maximum tilt.
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Note, I have a tracker system shown here, but these factors apply for fixed tilt as well
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when looking at a maximum height there's also the wind loading to consider as modules are tilted higher
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and higher or are further off the ground they're exposed to higher wind loading
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and this may either cause foundations to be deeper or heavier steel
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or may just simply exceed the mechanical rating of the modules
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or racking this is really a limitation that will be calculated by the racking vendor
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but just something to be aware of especially in areas with high wind speeds
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to determine the required clearance
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and maximum height of a tracker system you'll need to know
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the tracker rotation angle tracker rotation angles vary by manufacturer
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and are typically listed on the data sheets for the most part these will be between 45 degrees
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and 60 degrees with some manufacturers offering special options for higher angles
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for instance to stow at 75 degrees angle to avoid perpendicular impacts of hail, which is pretty cool.
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Remember
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that zoning regulations usually restrict the maximum height of a PV array based on the height of the system at maximum tilt.
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Zoning boards are fairly attuned to system height
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and may want a graphic like the one a few slides ago
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that shows the maximum height of the tractor system at full tilt.
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Vocabulario y notas de pronunciación para esta lección
Este vídeo tiene 30 frases y 414 palabras para practicar shadowing. La parte hablada dura 2:25. El hablante habla a un ritmo natural de unas 171 palabras por minuto, cercano a una conversación cotidiana. Solo el 78 % de las palabras está entre las 3.000 más comunes del inglés, por lo que el vocabulario es exigente.
Vocabulario clave de este vídeo
15 palabras menos comunes del vídeo, con su pronunciación y significado:
- clearance /ˈklɪɚ.əns/ (sustantivo) — despeje, despejo. The act of clearing or something (such as a space) cleared.
- rack /ɹæk/ (sustantivo) — estante, estantería. A series of one or more shelves, stacked one above the other.
- tilt /tɪlt/ (verbo) — ladear, ladearse. To slope or incline (something); to slant.
- tracker /ˈtɹækə(ɹ)/ (sustantivo) — rastreador, rastreadora. A person employed to follow and monitor a political rival.
- angle /ˈæŋ.ɡəl/ (sustantivo) — ángulo. A figure formed by two rays which start from a common point (a plane angle) or by three planes that intersect (a solid angle).
- rotation /ɹoʊˈteɪʃən/ (sustantivo) — rotación. The act of turning around a centre or an axis.
- reveal /ɹɪˈviːl/ (verbo) — revelar, propalar. To uncover; to show and display that which was hidden.
- vary /ˈvɛəɹi/ (verbo) — variar. To change with time or a similar parameter.
- manufacturer /ˌmænjʊˈfæktʃəɹə/ (sustantivo) — fabricante, fabriquero. A person or company that manufactures.
- module /ˈmɑd͡ʒul/ (sustantivo) — módulo. A self-contained component of a system, often interchangeable, which has a well-defined interface to the other components.
- parameter /pəˈɹæm.ə.tɚ/ (sustantivo) — parámetro. A value kept constant during an experiment, equation, calculation, or similar, but varied over other versions of the experiment, equation, calculation, etc.
- designer /dɪˈzaɪnɚ/ (sustantivo) — diseñador, diseñadora. A person who designs something, or who designs things as a profession.
- sheet /ʃit/ (sustantivo) — hoja, folio. A thin bed cloth used as a covering for a mattress or as a layer over the sleeper.
- regulation /ˌɹɛɡjʊˈleɪʃən/ (sustantivo) — reglamento. The act of regulating or the condition of being regulated.
- mechanical /məˈkænəkəl/ (adjetivo) — mecánico. Related to mechanics (the branch of physics that deals with forces acting on matter).
Phrasal verbs que vas a escuchar
- look at (verbo) — mirar, funar. To observe or watch.
Pronunciación a tener en cuenta
El hablante usa 3 contracciones y formas reducidas, como you'll, they're. Dilas en su forma corta, tal como las oyes.
- Los sonidos de “sh” y “zh”: rotation /ɹoʊˈteɪʃən/, sheet /ʃit/, regulation /ˌɹɛɡjʊˈleɪʃən/, consideration /kənˌsɪd.əˈɹeɪ.ʃən/, vegetation /ˌvɛd͡ʒəˈteɪʃən/
- Palabras largas — cuida el acento: manufacturer /ˌmænjʊˈfæktʃəɹə/, parameter /pəˈɹæm.ə.tɚ/, regulation /ˌɹɛɡjʊˈleɪʃən/, mechanical /məˈkænəkəl/, consideration /kənˌsɪd.əˈɹeɪ.ʃən/
Cómo practicar con este vídeo
- Escucha el vídeo entero una vez sin hablar y anota las palabras que no conoces.
- Empieza a velocidad 0,75×, haz shadowing frase por frase y vuelve a la velocidad normal cuando te resulte fácil.
- Grábate y compara con el original, prestando atención a palabras como clearance, rack, tilt.
¿Qué es la Técnica de Shadowing?
Shadowing es una técnica de aprendizaje de idiomas respaldada por la ciencia, desarrollada originalmente para la formación de intérpretes profesionales y popularizada por el políglota Dr. Alexander Arguelles. El método es simple pero poderoso: escuchas audio en inglés nativo y lo repites en voz alta de inmediato, como una sombra que sigue al hablante con solo 1-2 segundos de retraso. A diferencia de la escucha pasiva o los ejercicios de gramática, el shadowing obliga a tu cerebro y músculos de la boca a procesar y reproducir simultáneamente patrones de habla reales. Las investigaciones muestran que mejora significativamente la precisión de la pronunciación, la entonación, el ritmo, el habla conectada, la comprensión auditiva y la fluidez al hablar, convirtiéndola en una de las metodologías más efectivas para la preparación del IELTS Speaking y la comunicación en inglés en el mundo real.