Pratique du Shadowing: Understanding Height and Clearance: Critical Design Parameters for Utility-Scale Solar Racking - Apprendre l'anglais à l'oral avec la vidéo
Création de la leçon...
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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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Vocabulaire et conseils d’expression pour cette leçon
Cette vidéo contient 30 phrases et 414 mots à répéter en shadowing. La partie parlée dure 2:25. Le locuteur parle à un rythme naturel d’environ 171 mots par minute, proche d’une conversation courante. Seuls 78 % des mots font partie des 3 000 mots les plus courants en anglais, le vocabulaire est donc exigeant.
Vocabulaire clé de cette vidéo
15 mots moins courants de la vidéo, avec leur prononciation et leur sens :
- clearance /ˈklɪɚ.əns/ (nom) — évacuation, vidage. The act of clearing or something (such as a space) cleared.
- rack /ɹæk/ (nom) — étagère. A series of one or more shelves, stacked one above the other.
- tracker /ˈtɹækə(ɹ)/ (nom) — pisteur, traqueur. A person employed to follow and monitor a political rival.
- angle /ˈæŋ.ɡəl/ (nom) — angle. 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/ (nom) — rotation, tour. The act of turning around a centre or an axis.
- reveal /ɹɪˈviːl/ (verbe) — révéler. To uncover; to show and display that which was hidden.
- vary /ˈvɛəɹi/ (verbe) — varier. To change with time or a similar parameter.
- manufacturer /ˌmænjʊˈfæktʃəɹə/ (nom) — fabricant, fabricante. A person or company that manufactures.
- module /ˈmɑd͡ʒul/ (nom) — module. A self-contained component of a system, often interchangeable, which has a well-defined interface to the other components.
- parameter /pəˈɹæm.ə.tɚ/ (nom) — paramètre. A value kept constant during an experiment, equation, calculation, or similar, but varied over other versions of the experiment, equation, calculation, etc.
- designer /dɪˈzaɪnɚ/ (nom) — designer, styliste. A person who designs something, or who designs things as a profession.
- sheet /ʃit/ (nom) — feuille. A thin bed cloth used as a covering for a mattress or as a layer over the sleeper.
- regulation /ˌɹɛɡjʊˈleɪʃən/ (nom) — règlement, réglementation. The act of regulating or the condition of being regulated.
- mechanical /məˈkænəkəl/ (adjectif) — mécanique. Related to mechanics (the branch of physics that deals with forces acting on matter).
- slide /ˈslaɪ̯d/ (nom) — toboggan, glissoire. An item of play equipment that children can climb up and then slide down again.
Les verbes à particule que vous entendrez
- look at (verbe) — regarder. To observe or watch.
Prononciation à surveiller
Le locuteur utilise 3 contractions et formes réduites, comme you'll, they're. Prononcez-les sous leur forme courte, telles que vous les entendez.
- Les sons « sh » et « zh »: rotation /ɹoʊˈteɪʃən/, sheet /ʃit/, regulation /ˌɹɛɡjʊˈleɪʃən/, consideration /kənˌsɪd.əˈɹeɪ.ʃən/, vegetation /ˌvɛd͡ʒəˈteɪʃən/
- Mots longs — placez bien l’accent: manufacturer /ˌmænjʊˈfæktʃəɹə/, parameter /pəˈɹæm.ə.tɚ/, regulation /ˌɹɛɡjʊˈleɪʃən/, mechanical /məˈkænəkəl/, consideration /kənˌsɪd.əˈɹeɪ.ʃən/
Comment s’entraîner avec cette vidéo
- Écoutez la vidéo en entier une fois sans parler et notez les mots que vous ne connaissez pas.
- Commencez à la vitesse 0,75×, répétez phrase par phrase, puis revenez à la vitesse normale quand cela devient facile.
- Enregistrez-vous et comparez avec l’original, en faisant attention à des mots comme clearance, rack, tracker.
Qu'est-ce que la technique du Shadowing ?
Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.