Pratique du Shadowing: How Pumped Storage Power Plants Work (Hydropower) - Apprendre l'anglais à l'oral avec la vidéo

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So in this lesson, we're going to have a look at a special type of hydropower plant known as a pump storage power plant.

We've already looked at how various types of hydropower plant work, and this type is not much different from some of the others we've seen.

However, it's got quite a unique operating characteristic, which I'm going to discuss with you in a moment.

So we can see we've got our water inlet, and that is on the opposite side of this reservoir wall.

I'll spin around so we can actually go down and have a look at the inlet.

There is the inlet.

We can see we've also got a gate so we can close off the water inlet to the penstock.

We've then got our penstock which comes down, comes all the way down the hill.

This is actually quite a large head of pressure or a large head to have with this type of power plant.

Now having a large to medium head is a characteristic of a pump storage power plant.

What's unusual here is that the penstock is split into two and feeds two separate turbines.

Remember, you don't normally see that on power plants where you have a medium to large head.

Normally, one penstock will supply one turbine.

Now, I'm gonna go and have a look at the turbines and generators from the outside, because I did actually try and look earlier from inside and it's quite cramped.

We can see that we've got a turbine runner which is housed within this casing, and the water itself comes from the penstock.

You can see it coming in here.

It's fed to the turbine runner, And then it's discharged and it will go out through the draft tube and into the river.

See if we can find the draft tube.

And this is it here, and on the opposite side, we also have another draft tube.

So this is very similar in a way to some of the other hydro plants that we looked at.

It's just that the head is much larger.

If we've got a larger head, then that means we can have either a Pelton type turbine

or a Francis type turbine we're not going to have a Kaplan type turbine because the head is simply too large.

Pump storage power plants though only utilize a Francis type turbine.

They do not use Pelton type turbines or Kaplan.

And there's a very simple reason for this.

Francis type turbines can be used to pump water back up the mountain.

That means we can generate electricity when water flows down the mountain

and then we can pump the water back up again to the upper reservoir in order to refill the upper reservoir.

But why would we do this?

Why would we pump water back up and then let water back down again later?

Well a pump storage hydropower plant is very similar to a battery, except we're not storing chemical energy.

We're actually storing the potential energy of the water at a higher elevation.

Let's imagine for a moment that it's a very sunny, windy day.

And that means that we're generating a lot of electricity from wind turbines and solar power.

This also means that electricity is cheap.

It's in abundance.

So imagine we're paying one cent per kilowatt hour just to keep things simple.

Now it might be that the people operating this pump storage plant think

that one cent per kilowatt hour is very cheap

and they'll buy the electricity in order that they can power the Francis turbines and pump the water from the lower reservoir,

in this case a river, up to the upper reservoir.

And they'll do this all day because it's been sunny all day and there's also been a lot of wind, so we've got a lot of cheap electricity.

When the upper reservoir's full, and this may take eight to 10 hours,

maybe more, maybe less, we'll hold on to all of this stored potential energy.

And what we'll do, we'll wait until it's dark And all of a sudden, all of that abundant electrical supply that was provided by the sun from solar power,

and maybe the wind dies down as well, all of that abundant electrical power will disappear.

It'll no longer be available in the national grid.

If you like this video and would like to see more engineering related tutorials, then check out some of the links in the video description area.

And if you click on these links, you'll get a special discount price for all of our engineering video courses.

If you wanna support the channel, then please do like this video or share it on social media.

Really does help us out.

You can also leave a comment in the comment section.

And if you've got any questions, then please just ask, and I will try to respond to you within 48 hours.

Thanks very much for your time.

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Vocabulaire et conseils d’expression pour cette leçon

Cette leçon d’expression orale de niveau C1 s’appuie sur la vidéo « How Pumped Storage Power Plants Work ». Les mots qui reviennent le plus souvent : turbine, plant, type, pump, penstock. Cette vidéo contient 55 phrases et 835 mots à répéter en shadowing. La partie parlée dure 4:54. Le locuteur parle à un rythme naturel d’environ 171 mots par minute, proche d’une conversation courante. 84 % des mots font partie des 3 000 mots les plus courants en anglais ; le reste mérite d’être vu avant de commencer.

Vocabulaire clé de cette vidéo

Les 15 mots les plus avancés de la vidéo, avec leur prononciation et leur sens :

Mot	Prononciation	Sens
turbine nom	/ˈtɜː.baɪn/	turbine
penstock nom		conduite forcée
reservoir nom	/ˈɹɛz.ə(ɹ).vwɑɹ/	réservoir
inlet nom	/ˈɪnlət/	crique, bras de rivière
kilowatt nom	/ˈkɪ.ləˌwɒt/	kilowatt
abundant adjectif	/əˈbʌn.dənt/	abondant
characteristic nom	/ˌkæɹ(ə)ktəˈɹɪstɪk/	caractéristique
sunny adjectif	/ˈsʌni/	ensoleillé
hydroelectric adjectif	/ˌhʌɪdrəʊɪˈlɛktrɪk/	hydro-électrique
windy adjectif	/ˈwɪn.di/	venteux
tutorial nom	/ˌtjuːˈtɔːɹɪəl/	didacticiel, tutoriel
abundance nom	/əˈbʌn.dn̩s/	abondance
elevation nom	/ˌɛlɪˈveɪʃn̩/	élévation
generator nom	/ˈdʒɛnəɹeɪtə(ɹ)/	générateur, générateur électrique
disappear verbe	/dɪsəˈpɪɹ/	disparaître

Les verbes à particule que vous entendrez

Mot	Sens
back up verbe	reculer
back down verbe	baisser d'un ton
check out verbe	mater, regarder
come down verbe	descendre, tomber
go down verbe	descendre
go out verbe	sortir

La grammaire de cette vidéo

Les structures que le locuteur utilise le plus, avec les mots exacts de la vidéo :

Structure	Dans la vidéo
Phrases conditionnelles if + proposition, will/would + verbe — une condition et son résultat	If you like this video and would like · if you click on these links, you'll get
Voix passive be + participe passé — l’accent est mis sur ce qui arrive, pas sur qui le fait	is split · is housed · was provided
Present perfect have/has + participe passé — une action passée qui compte encore maintenant	We've already looked · it's been

Prononciation à surveiller

Le locuteur utilise 28 contractions et formes réduites, comme we've, we're, we'll. Prononcez-les sous leur forme courte, telles que vous les entendez.

Mots longs — placez bien l’accent: characteristic /ˌkæɹ(ə)ktəˈɹɪstɪk/, hydroelectric /ˌhʌɪdrəʊɪˈlɛktrɪk/, generator /ˈdʒɛnəɹeɪtə(ɹ)/

Les sons difficiles pour les francophones :

/tʃ/ et /dʒ/ — à ne pas adoucir en « ch » et « j »: discharge /dɪsˈtʃɑɹdʒ/, generator /ˈdʒɛnəɹeɪtə(ɹ)/
/r/ anglais — langue recourbée, sans frotter la gorge: reservoir /ˈɹɛz.ə(ɹ).vwɑɹ/, characteristic /ˌkæɹ(ə)ktəˈɹɪstɪk/, hydroelectric /ˌhʌɪdrəʊɪˈlɛktrɪk/, refill /ˈɹiː.fɪl/, tutorial /ˌtjuːˈtɔːɹɪəl/

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 turbine, penstock, reservoir.

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.

Technique du shadowing : lire le guide complet étape par étape →

Pratique du Shadowing: How Pumped Storage Power Plants Work (Hydropower) - Apprendre l'anglais à l'oral avec la vidéo

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