data center servers&efficiency

8/3/2019 Data Center Servers&Efficiency

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DATA CENTERS

Data centers can have the following:-

1. Servers a) Computing

i) 1U/ Blade/ Custom Made.

ii) 2U & Greater

b) Storage

i) Normal

ii) Magnetic.


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DATA CENTERS

2. Communication Servers

a) High Density- 10 to13KW per rack

b) Extreme Density

- 23 to 35KW per rack


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SERVERS

SIMPLE

DENSE

BLADE

???? Next Gen


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SERVERS

Environmental specifications

Specification Value Temperature range*

Operating 10C to 35C (50F to 95F)

Shipping -40C to 60C (-40F to140F)

Storage -20C to 60C (-4 to 140C)

Maximum wet bulb temperature 30C (86F)

Relative humidity

(noncondensing)**

Operating 10% to 90%

Shipping 10% to 90%

Storage 10% to 95%


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SERVERS

Power specifications

Single-phase power

Specification Value

Power cord IEC-320 C19-C20 1.22 m (4 ft)

Output 2250 W per power supply

Input requirements

Rated input voltage 200 VAC to 240 VAC

Rated input frequency 50 Hz to 60 Hz

Rated input current per power supply 12.6 A at 208 VAC

11.9 A at 220 VAC13.1 A at 200 VAC

Rated input power per power supply (maximum) 2612 VA


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SERVER COMPONENTS

TRANSISTORS

CHIPS / PROCESSORS

FIRING GATES

DIODES, TRIODES, CAPACITORS, VARIACS,RESISTORS, etc.

CARD POWER MODULES

TRANSFORMERS

COOLING SYSTEM (ACTIVE AND PASSIVE)

CASING

RACKS


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ASHRAE GUIDELINES TC9.9


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PROCESSORS


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PROCESSORS


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PROCESSORS


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PROCESSORS


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Passive Heat Sink


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Passive heat sink


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Active Heat Sink


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TYPICAL MOTHERBOARD


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TYPICAL MOTHERBOARD


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TYPICAL MOTHERBOARD

It is important to have the air flow over the hotsurfaces to pick up and reject the heat.

It is also important to have the warm/ heated air notto serve to other components which require cooling.

This combination of location suiting the air flow and

heat rejection as well as space allocation to theprocessors, chips, gates, etc is important in designingthe system architecture of the PCB.

Special efforts and investments are made along withCFD simulations to freeze and standardise thearchitecture.


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TYPICAL MOTHERBOARD

DC Fans with variable speed drives are usedto increase or decrease the air quantity as

per the temperature inside the servers.

Simplest way to know, if everything is OK ornot, is to listen to the noise of the servers.

Each server needs to be looked into as per itsrequirements and needs.


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ASHRAE RECOMMENDATIONS

Description Minimum Maximum

Dry Bulb 18oC 27oC

Rate of Temp Rise NA 5oC/Hr

Relative Humidity 40% 60%

Dew Point NA 16.7oC

Air Quality Merv* 11 NA

*MERV- minimum efficiency reporting values


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2004 version 2008 version

Low End Temperature 20oC (68oF) 18oC (64oF)

High End Temperature 25oC (77oF) 27oC (80.6oC)

Low End Moisture 40% RH 5.5oC (41.9oF) DPT

High End Moisture 55% RH 60% RH & 15oC (59oF)DPT


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SERVER PERFORMANCE

With fixed fan speed


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SERVER PERFORMANCE

With variable fan speed


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STRATEGIES


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STRATEGIES


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STRATEGIES


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SUMMARY

LEARNINGS-a) HEAT DISSIPATION DENSITY VARIES IN DATA CENTERS.

b) HEAT DISSIPATION DESNITY VARIES WITHIN THE

DATA CENTER.

c) SERVERS REQUIRE AIR INLET TEMPERATURES OF20-25oC.

d) RELATIVE HUMIDITY SHOULD BE BETWEEN 40% TO 60%

e) DEVIATIONS FOR SHORT DURATIONS ARE OK, BUT SHOULDNOT EXCEED CUMULATIVELY A FEW DAYS IN A YEAR.

f) HEAT IS REMOVED BY AIR FLOW & NOT BY EQUIPMENTALONE.

g) PROCESSOR & COMPONENT TEMPERATURES ARENORMALLY UPTO 70oC, WHILE OCCASSIONALY IT CAN BE AS

HIGH AS 90o

C.


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SUMMARY

ENERGY CONSERVATION

a) Reduction of power consumption is a timeconsuming, tedious and patient job.

b) There is no fixed formula for data center.c) Load density patterns are important criteria in data

center energy study.

d) 10-15% of server power is consumed by the serverfans. That itself is a conservation target.

e) Overcooling is as wrong as under-cooling. Henceoptimum settings will ensure best performance aswell as minimum energy consumption.

f) Avoid short circuiting under all circumstances.Even through the racks.


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SUMMARY

OPPORTUNITIES:-

a) Server fan conservation upto 10%

b) PAC/ AHU Air Flow consumption upto 30%

c) Refrigeration equipment consumption upto 10%.

d) PAC Unit Heaters and Humidifiers upto 10%

e) May be all or combination of some of above.


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QUESTIONS PLEASE

THANK YOU

data center servers&efficiency

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