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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.

101

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

102

So first is about full ecosystem integration.

103

We will collaborate with customers across the entire industry from the

104

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

105

Like we will discuss about their requirements.

106

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,

108

the secondary pipes, and even the control system.

109

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

110

And that is very critical for the reliability,

111

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

112

And the second level is full application scenarios.

113

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

114

We developed the products based on all related application scenarios.

115

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

116

that may happen in a liquid cooling server production line.

117

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

118

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

119

We have a whole series of the products for that.

120

And the second is the lab test application scenario.

121

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

122

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

123

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

124

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.

125

And the last level is the full lifecycle management.

126

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

127

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

128

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

129

And for the installation and maintenance,

130

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

131

So that's the three -fold.

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We call it a three -fold.

133

We call it a full -chain nuclear cooling solution.

134

In the following parts I will give some detailed introduction

135

Of our products

136

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

141

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

142

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

143

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

144

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.

146

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

147

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

148

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

149

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.

154

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

155

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

156

And for our URAC liquid to liquid CDU,

157

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

158

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

159

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

160

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.

162

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.

164

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.

166

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

167

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

168

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

181

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

182

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.

184

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

185

and also last part is the draining and nitrogen injection.

186

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

187

So there is a video introduce this concept.

188

We'll be right back.

189

Thank you.

190

Thank you.

191

Thank you.

192

Thank you.

193

Thank you.

194

Oh, So thank you.

195

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

196

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

197

that you have seen in this testing line.

198

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

199

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

200

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

201

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

202

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

203

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

204

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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Bài luyện nói này dựa trên video “Envicool Full Chain Liquid Cooling 2GW+ Deployment Case Study presented by Envicool”. Những từ được nhắc lại nhiều nhất trong bài: cooling, liquid, test, solution, customers. Video này có 206 câu và 2480 từ để luyện shadowing. Phần lời nói dài 23:22. Người nói nói chậm, khoảng 106 từ mỗi phút, đủ thời gian để bạn bắt chước từng âm. 83% số từ nằm trong 3.000 từ tiếng Anh thông dụng nhất; phần còn lại nên xem trước khi luyện.

Từ vựng quan trọng trong video

15 từ đáng học trong video, kèm phiên âm và nghĩa:

Từ	Phiên âm	Nghĩa
liquid danh từ	/ˈlɪk.wɪd/	nước, chất lỏng
rack danh từ	/ɹæk/	giá
server danh từ	/ˈsɝvɚ/	trình chủ, máy chủ
requirement danh từ	/ɹɪˈkwaɪɹmənt/	yêu cầu
pipe danh từ	/ˈpaɪp/	ống sáo, ống tiêu
scenario danh từ	/sɪˈnɛəɹioʊ/	trường hợp, kịch bản
introduce động từ	/ˌɪntɹəˈdus/	giới thiệu
density danh từ	/ˈdɛn.sə.ti/	khối lượng riêng, mật độ
component danh từ	/kəmˈpoʊ.nənt/	bộ phận
stable danh từ	/ˈsteɪ.bəl/	chuồng, chuồng ngựa
loop danh từ	/luːp/	đường nhánh, thòng lọng
reliable tính từ	/ɹɪˈlaɪəbl̩/	tin cậy, đáng tin cậy
drain danh từ	/dɹiːn/	cống
injection danh từ	/ɪnˈd͡ʒɛk.ʃən/	sự tiêm
nitrogen danh từ	/ˈnaɪ.tɹə.d͡ʒən/	nitơ, đạm khí

Ngữ pháp trong video

Những cấu trúc người nói dùng nhiều nhất, kèm đúng cụm từ trong video:

Cấu trúc	Trong video
Thì hiện tại hoàn thành have/has + quá khứ phân từ — việc đã xảy ra nhưng còn liên quan đến hiện tại	have been · have already delivered · have built
Câu bị động be + quá khứ phân từ — nhấn vào việc xảy ra, không phải người làm	are established · is based · are operated

Phát âm cần chú ý

Người nói dùng 3 dạng rút gọn, ví dụ I'm, we'll, we're. Hãy nói theo dạng ngắn đúng như bạn nghe.

Âm “th”: booth /buθ/, thermal /ˈθɜːməl/
Âm “sh” và “zh”: integration /ˌɪn.tɪˈɡɹeɪ.ʃən/, installation /ˌɪn.stəˈleɪ.ʃən/, injection /ɪnˈd͡ʒɛk.ʃən/, structural /ˈstɹʌk(t͡)ʃəɹəl/, flush /ˈflʌʃ/
Từ dài — đặt trọng âm cho đúng: integration /ˌɪn.tɪˈɡɹeɪ.ʃən/, installation /ˌɪn.stəˈleɪ.ʃən/, automatic /ˌɔː.təˈmæt.ɪk/, fundamental /ˌfʌn.dəˈmɛn.təl/, manufacturer /ˌmænjʊˈfæktʃəɹə/

Những âm người Việt thường gặp khó:

Cụm phụ âm cuối — đọc đủ từng âm, đừng nuốt âm cuối: requirement /ɹɪˈkwaɪɹmənt/, component /kəmˈpoʊ.nənt/, fold /ˈfəʊld/, expand /ɪkˈspænd/, uniform /ˈjunɪˌfɔɹm/
Âm /tʃ/, /dʒ/ và /ʒ/ — tiếng Việt không có, đừng đọc thành “ch” hay “gi”: modular /ˈmɑd͡ʒəlɚ/, injection /ɪnˈd͡ʒɛk.ʃən/, nitrogen /ˈnaɪ.tɹə.d͡ʒən/, chip /t͡ʃɪp/, manufacturer /ˌmænjʊˈfæktʃəɹə/
Âm /æ/ — mở miệng rộng hơn âm “e”: rack /ɹæk/, automatic /ˌɔː.təˈmæt.ɪk/, manufacturer /ˌmænjʊˈfæktʃəɹə/, validation /ˌvæl.əˈdeɪ.ʃən/, expand /ɪkˈspænd/

Cách luyện với video này

Nghe hết video một lần, chưa cần nói, và ghi lại những từ bạn chưa biết.
Nói đuổi từng câu ở tốc độ bình thường, lặp lại mỗi câu đến khi nhịp của bạn khớp với người nói.
Ghi âm giọng mình rồi so với bản gốc, chú ý các từ như liquid, rack, server.

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