跟讀練習: Envicool Full Chain Liquid Cooling 2GW+ Deployment Case Study presented by Envicool - 通過影片學習英語口語

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My name is Lin Niu.

I'm the Product Manager for Liquid Cooling Solutions from NVQO.

Yeah, thank you.

Today I want to talk about our experiences in liquid cooling solutions for the past 20 years.

And so nice to have you all here.

And we are all here because we all know that the way we cool down the infrastructure is changing.

The question is, how do we get there together?

So for the following 20 minutes, I will introduce who we are, what we provide, and the ideas behind our work.

Let's first have a very brief introduction of our company,

in case some of you may not that familiar with us we are established in 2005 so making 20 years

in this industry for liquid cooling

and after 20 years developments we have been a team of over 2 000

or 5 000 employees globally and from the very beginning of our very first liquid cooling products delivered in 2015,

we have already delivered over two gigawatts liquid cooling solutions.

So today I want to discuss with more about liquid cooling solutions with you, with our customers, with our partners.

Our headquarters and main R &D centers is based in China and to maintain our competitive edge,

we also have our U .S.

R &D center in USA.

It's about 20 minutes drive from here.

And more critically, our manufacturing -based strategy is to distribute it globally.

We have our facilities in Thailand, we have facilities in USA,

and we also have our manufacturing bases in multiple locations in China.

And this ensures the supply chain resiliency and it can help us to meet critical and aggressive market timeline.

And about the service network, we have built a complete service network to ensure that wherever our customers are,

they can easily get in touch with us to get all the supports from technical to service.

Since 2021, we have seen a surge in customers asking about liquid cooling solutions.

At that time, most of the rack density are from 20 to 40 kilowatts.

And the concern of our customers are how much energy they can save if they use this liquid cooling solution.

And what is the comparison between the air cooling and the liquid cooling?

About the K -PACs, about the O -PACs.

But things changed when last year NVIDIA released their NBL 72 rack.

120 kilowatts per rack make the air cooling no longer available.

The liquid cooling solution is not just an option solution is the only solution to that high density rack.

And based on the explosive growth of the AI, it can be tell, it can clearly be tell that in the future,

one megawatt per rack will be the future.

And it's in near future, maybe in 2024, 27.

So what will be the solution for this high -density rack.

And from the heat transfer theory, we know that if we want to meet high cooling capacity,

high cooling requirements, we have three main theories.

The first is about the new coolant type.

And the second is to increase the heat transfer area.

And the third is about high flow rates.

But there are some questions.

First, for the new coolant type, we can talk about nanofruit, we can talk about refrigerants used in some two -phase cooling systems.

We need to do a long -term compatibility test to use it before we implement it in a real data center.

Because those liquid cooling servers, that service they they provide, they support is very critical.

The second is about the surface, is about the area of the heat transfer surface.

When we're talking about the new structural design of the heat sink, about the cold place, we need to think about the coast.

That's one part.

And the second is about the production feasibility.

Some of the structure is very hard to make it in real world.

So that's the second.

And for the high flow rate, a high flow rate will of course cause a very high pressure job.

It will cause more space used in these data centers.

So how to make this happen?

The last is about the AI training, that it's very different to traditional general servers' works.

Like in different stages of AI training, the GPU load is different.

So how do our cooling systems can respond to this constantly or frequently vary those.

That's our question.

So the deeper we dive into this system, the more questions we find.

All these considerations are the foundation of the work and the projects that we are working on.

In China, we have built a joint lab with some of our customers to do some fundamental research.

And for the component level,

we have to do our new code plate design performance and the optimization of the structural study.

And we also do the leak test of the QD when they are operated under some offsets.

And we also do the research of the manifold uniform distribution and the coolant, the long -term lifetime property.

And for the system level, we also built our long -term operations test setup to do the test like

if the flow rate is over 1 .5 meter per second, what will happen?

What influence it will have on the whole system and the performance of the code plates and the strength of the filter?

What will be the influence? and for the coolant parts,

what is the lifetime model of the coolant?

Because we need to replace the coolant frequently now with like pitch 25 or other kinds of the coolant.

So how can we make it last longer?

That's also one of our topic.

And also we will do some CDU control logic test.

As we just discussed, the loads of AI training will vary frequently.

So how can our cooling system respond to it and make a stable flow rate and a stable temperature supply?

Those are all the topics and projects we are working on.

And the goal of our company is very simple.

We want to support reliable, we want to support sustainable solutions to our customers.

We want to discuss more with our customers, with our partners, to discuss about their requirements,

to know more about the problem they are facing, and to provide more reliable products and solutions to them.

And in U .S., we are also building a test platform in our office.

This platform is composed of four parts.

The first is the liquid -to -liquid -CDU loop.

The second is the sidecar solution, and the in -rack solution, and also the fan wall air cooling solutions.

With this Mooc data center,

it can give a very clear understanding to our customers who visit it to know what is the liquid cooling solution,

what is the direct -to -chip liquid cooling solution, and what is the valve configuration,

and maybe all the operation procedures that will happen in a real data center.

And that is one of the main features of this platform.

And the second is about the testing and the research.

We will use this platform to do some fundamental research.

Like for the CDU, we will do the thermal test, we will do the control logic test,

the function test, and also maybe the whole cooling system validation test.

And we will also use this platform to do some long -term operation.

So let's look what we have for this industry.

We want to provide reliable solutions for our customers.

So we raised the concept of full -chain nuclear cooling.

100

We defined the full chain with three strategic pillars.

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full ecosystem integration, full application scenario, and also the full lifecycle management.

102

So first is about full ecosystem integration.

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We will collaborate with customers across the entire industry from the

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chief provider to several manufacturers all the way to the end users.

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Like we will discuss about their requirements.

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We will develop these products with them from the rack level, like code place, like QD and manifolds,

107

and all the way to the facility level, like the CDU, different types of the CDU, the code source, the coolant,

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the secondary pipes, and even the control system.

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And with this approach, it can also help us to have a better understanding of the entire system system.

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And that is very critical for the reliability,

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because only in that way we can make all the components work together seamlessly.

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And the second level is full application scenarios.

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We have expanded our products line away from the liquid cooling loop itself.

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We developed the products based on all related application scenarios.

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Like for the production line, we have our whole series of the products for all the critical tasks

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that may happen in a liquid cooling server production line.

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Like in the production line of liquid cooling server, they need to do the failing, draining, leak tests, and the flushing,

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and maybe in the last part, the nitrogen injection and the drying.

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We have a whole series of the products for that.

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And the second is the lab test application scenario.

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Some of our server manufacturer customers need to do thermal tests, need to do the flow tests to their liquid cooling server demo.

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So we will, based on their requirements, to develop those specific equipments for the test.

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And the last is for operation in a real data center.

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For the data center operation and maintenance, for the data center commissioning, we have our load banks and the emulators for the cooling system validation.

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And the last level is the full lifecycle management.

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Reliability is not only about the components, it's about the whole lifecycle management.

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So we will design all the products that we share in last pages all the designs are done by ourselves,

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and all the production and manufacturing are in our own factories.

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And for the installation and maintenance,

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we also have our own teams to do all these works to minimize the complexity for our customers.

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So that's the three -fold.

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We call it a three -fold.

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We call it a full -chain nuclear cooling solution.

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In the following parts I will give some detailed introduction

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Of our products

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First is the CDU CDU is the core components

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For this direct -to -chip liquid cooling

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So we provide in -road CDU We provide in -react CDU Also both we have

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Liquid -to -liquid type

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And liquid -to -air type

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For our liquid in -road CDU Based on our This year's project experiences

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we have already delivered multiple models from 300 kilowatts all the way to 2 .5 megawatts.

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And especially for our 2 .5 megawatts CDU, its cooling capacity is based on 4 -degree Celsius ATD,

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and it has a wide flow rate range from 1 % to 100 % with very stable temperature and flow rate support.

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And the second is about our sidecar, it's also the in -row liquid -to -air CDU.

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Our current model can support 100 kilowatts under 15 degrees Celsius ATD, and we also have N plus 1 pumps,

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N plus 1 the power module, and N plus 1 the vents to support concurrent maintenance.

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And in this Q4, we will have our 240 kilowatt sidecar.

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It's about two rack wide.

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Please, you can check our social media.

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We will release in Q4.

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And then it's about our INRAC CDU.

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We have our INRAC Liquid2Air and Liquid2LiquidCDU.

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For our Liquid2AirCDU, this is mainly used in some lab test scenarios.

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Now our standard model is 20 kilowatts, but of course we can customize based on customer's requirements.

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And for our URAC liquid to liquid CDU,

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the most powerful unit that we have now is 160 kV under 4 degree Celsius ATD.

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And it also has N plus 1 POM redundancy, and it can be compatible for all our WRAC.

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So for the manifold and QD, now the most commonly used QD in this industry now is UQD series series,

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and also now we have MQD series.

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Of course, we have our own design for the QDs, like low flow resistance QD and other types of QD.

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If you have interest, you can come to our booth to have a visit.

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And for our manifold, manifold is a high customized product.

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Now, the largest manifold that we have provided is about 800 LPM per rack.

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The secondary pipe is also a highlight product that we provide.

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For the secondary pipes, because this liquid cooling system requires very high cleanliness, so all these pipes are manufactured in modular

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and they are prefabricated in our own factories and shipped to the project site to do the installation.

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And we have modular pipes.

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And in order to decrease the requirements for the manpower and the lead time,

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we also provide this framed piping.

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It integrates the pipes into the supports, and all the integration will be happening in our own factories.

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You only need to do some tiny connections on site.

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It will decrease about 50 to 70 % of the time

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that it requires to do the installation of the whole secondary loop.

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This is our load bank.

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And our load bank is also a modular requirement.

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For our load bank, we provide this for you 20 kilowatts liquid cooling load bank.

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It can be integrated in one rack,

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multiple this modular liquid cooling load bank can be integrated in one rack to reach about 240 kilowatts per rack.

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And we are also looking for a more higher density of

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this liquid cooling load bank for the test of our future rack, like one megawatts or even higher.

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So the last part is about our products for the production line.

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We have discussed with our server manufacturing customers about the typical process during their production of the server.

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Typically, including the leak test, flushing, draining, fading, burning test,

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and also last part is the draining and nitrogen injection.

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We want to introduce our concept of automation to our customers.

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So there is a video introduce this concept.

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We'll be right back.

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Thank you.

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Thank you.

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Thank you.

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Thank you.

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Thank you.

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Oh, So thank you.

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So that's our production testing line for the liquid cooling servers.

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And I will also introduce some of the details of the parameters of the products

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that you have seen in this testing line.

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So, this one, we call it automatic test tools.

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So, in this unit, we have integrated all the tasks that it requires,

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like all the filling and the drying nitrogen injection to this equipment.

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But for customers who will require that all the function parts need to be separated,

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we also have our separated products for those parts like this is the automatic failing tools.

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And so we are all the explorers in this AI era and we are all the explorers in this liquid cooling era.

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We want to have more collaborations with our customers and with our partners to make innovation.

205

So I warmly welcome you to our booth at B14 to have a more detailed view of our products.

206

Thank you.

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本課的詞彙與口語要點

這節口語課以影片“Envicool Full Chain Liquid Cooling 2GW+ Deployment Case Study presented by Envicool”為素材。影片中反覆出現的詞有：cooling, liquid, test, solution, customers。這段影片共有 206 個句子、2480 個單詞可供跟讀。講話部分時長為 23:22。說話人語速較慢，每分鐘約 106 個詞，你有足夠的時間模仿每一個音。 83% 的單詞屬於英語最常用的 3,000 詞，其餘的詞建議在練習前先學一下。

影片中的重點詞彙

影片中 15 個值得學習的單詞，附發音和釋義：

單詞	發音	釋義
liquid 名詞	/ˈlɪk.wɪd/	液體 /液體, 液態 /液態
rack 名詞	/ɹæk/	架子
server 名詞	/ˈsɝvɚ/	伺服器 /伺服器, 伺服器
requirement 名詞	/ɹɪˈkwaɪɹmənt/	要求, 需求
pipe 名詞	/ˈpaɪp/	笛子, 管子
scenario 名詞	/sɪˈnɛəɹioʊ/	指令碼 /指令碼, 場景 /場景
introduce 動詞	/ˌɪntɹəˈdus/	介紹 /介紹, 紹介 /紹介
density 名詞	/ˈdɛn.sə.ti/	密度
component 名詞	/kəmˈpoʊ.nənt/	元件, 部件
stable 名詞	/ˈsteɪ.bəl/	馬廄, 馬棚 /馬棚
loop 名詞	/luːp/	圈, 環 /環
reliable 形容詞	/ɹɪˈlaɪəbl̩/	可靠, 穩妥 /穩妥
integration 名詞	/ˌɪn.tɪˈɡɹeɪ.ʃən/	融合, 統合 /統合
installation 名詞	/ˌɪn.stəˈleɪ.ʃən/	安裝 /安裝
leak 名詞	/liːk/	漏洞

影片中出現的短語動詞

單詞	發音	釋義
cool down 動詞	/kuːl ˈdaʊn/	冷卻 /冷卻

影片中的語法

說話人最常用的結構，並附上影片中的原話：

結構	影片中的用法
現在完成時 have/has + 過去分詞 — 過去發生但與現在仍有關聯的事	have been · have already delivered · have built
被動語態 be + 過去分詞 — 強調發生了什麼，而不是誰做的	are established · is based · are operated

需要注意的發音

說話人用了 3 次縮略和弱讀形式，例如 I'm, we'll, we're。請按聽到的簡短形式來說。

“th” 音: booth /buθ/, thermal /ˈθɜːməl/
“sh” 和 “zh” 音: integration /ˌɪn.tɪˈɡɹeɪ.ʃən/, installation /ˌɪn.stəˈleɪ.ʃən/, injection /ɪnˈd͡ʒɛk.ʃən/, structural /ˈstɹʌk(t͡)ʃəɹəl/, flush /ˈflʌʃ/
長單詞——注意重音位置: integration /ˌɪn.tɪˈɡɹeɪ.ʃən/, installation /ˌɪn.stəˈleɪ.ʃən/, automatic /ˌɔː.təˈmæt.ɪk/, fundamental /ˌfʌn.dəˈmɛn.təl/, manufacturer /ˌmænjʊˈfæktʃəɹə/

中文母語者容易讀錯的音：

/v/ — 不要讀成 /w/，上齒輕觸下唇: server /ˈsɝvɚ/, vary /ˈvɛəɹi/, validation /ˌvæl.əˈdeɪ.ʃən/, aggressive /əˈɡɹɛs.ɪv/, innovation /ˌɪn.əˈveɪ.ʃən/
詞尾子音 — 要讀清楚，後面不要加母音: liquid /ˈlɪk.wɪd/, rack /ɹæk/, requirement /ɹɪˈkwaɪɹmənt/, pipe /ˈpaɪp/, introduce /ˌɪntɹəˈdus/
/r/ 和 /l/ 的區別: reliable /ɹɪˈlaɪəbl̩/, structural /ˈstɹʌk(t͡)ʃəɹəl/, explorer /ɛkˈsplɔːɹə(ɹ)/, collaboration /kəˌlæbəˈɹeɪʃən/, critically /ˈkɹɪt.ɪ.kə.li/

如何用這段影片練習

先完整聽一遍影片，不要開口，記下不認識的單詞。
用正常速度逐句跟讀，每句重複到你的節奏與說話人一致為止。
錄下自己的聲音並與原聲對比，特別注意 liquid, rack, server 這類單詞。

什麼是跟讀法？

跟讀法 (Shadowing) 是一種有科學依據的語言學習技巧，最初開發用於專業口譯員的培訓，並由多語言者Alexander Arguelles博士普及。這個方法簡單而強大：您在聽英語母語原聲的同時立即大聲重複——就像是一個延遲1-2秒緊跟說話者的影子。與被動聽力或語法練習不同，跟讀法強迫您的大腦和口腔肌肉同時處理並模模擬實的講話模式。研究表明它能顯著提高發音準確性，語調，節奏，連讀，聽力理解和口語流利度——使其成為雅思口語備考和真實英語交流最有效的方法之一。

影子跟讀法: 閱讀完整分步指南 →

跟讀練習: Envicool Full Chain Liquid Cooling 2GW+ Deployment Case Study presented by Envicool - 通過影片學習英語口語

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本課的詞彙與口語要點

影片中的重點詞彙

影片中出現的短語動詞

影片中的語法

需要注意的發音

如何用這段影片練習

什麼是跟讀法？