This presentation discusses how to optimize data center efficiency. It begins with an introduction of new regulations for energy efficiency in Europe. Then it discusses basics of data center design including power, cooling, and availability requirements. It notes that energy costs are rising significantly. The presentation explores optimizing hardware, UPS systems, and cooling to improve efficiency. It provides examples of efficiency gains from right-sizing infrastructure and high-efficiency UPS systems. Overall, the presentation suggests that data center efficiency can be improved by up to 40% through optimization techniques.

1. All content in this presentation is protected – © 2008 American Power Conversion Corporation
Eduard Bodor
System Engineer APC
Romania & Bulgaria
The Efficient Enterprise

2. APC by Schneider Electric – Eduard Bodor – 02. Dec. 2009
AGENDA
●Introduction and some new regulations
●Some basics
●DCiE
●Optimizing
● Hardware
● UPS
● Cooling
●Summary

3. APC by Schneider Electric – Eduard Bodor – 02. Dec. 2009
European Commision code
● http://re.jrc.ec.europa.eu/energyefficiency/

4. APC by Schneider Electric – Eduard Bodor – 02. Dec. 2009
Basic requirements for IT-equipment
● Power Supply
„CBEMA“-Curve
● Air Conditioning
20 - 26 °C
20 - 80% rF
● Availability
Tier 1 to 4

5. APC by Schneider Electric – Eduard Bodor – 02. Dec. 2009
Energy Costs, Trend: rising
● 0,12 € per kWh is an average value for electrical power
costs in Europe
● Based on that price the annual cost of power supplied to
1 kW of IT-equipment is around 1.000,- €.
(365 x 24h = 8760h x 0,12 Kr = 1.051,20 €)
● The Network Critical Physical Infrastructure needs around
the same amount of power ! => 1.000 € per kW per year
● During the typical 10-year-Lifetime of a datacenter
every 1 kW of IT-load cost around 20.000,- € !
and
1kWh = 600g CO2 !

6. APC by Schneider Electric – Eduard Bodor – 02. Dec. 2009
Where does Hardware inefficiency go?
.001%
99.9997% of WATTS IN
becomes heat
.0003% of WATTS IN
becomes computation
Silicon
Business
Apps
99.999%
.001%
Inefficiency
(waste)
Useful
Work
Computing
Hardware
60%
40%
60%
50%
Physical
Layer
50%
50%
IN

7. APC by Schneider Electric – Eduard Bodor – 02. Dec. 2009
Data Center Infrastructure Efficiency
DCiE = Watts delivered to IT load
Watts IN to data center
This definition follows the US Environmental Protection Agency ENERGY STAR Program.
Detailed information can be found in APC-MGE Whitepaper 157
This ratio gives a value between 0 and 1
and is normally expressed in %
=> Higher value = higher efficiency

8. APC by Schneider Electric – Eduard Bodor – 02. Dec. 2009
Optimising the IT
●Remove all old or unused hardware
●Use modern IT-equipment with high efficiency power
supplies (90%+) and intelligent power management
●Virtualization for efficient loading of IT-equipment
(increase from 15% to 80% load)
●Don‘t forget the peripherals and desk-tops („Stand-by“)

9. APC by Schneider Electric – Eduard Bodor – 02. Dec. 2009
Rightsizing !
2(N+1) power
N+1 cooling

10. APC by Schneider Electric – Eduard Bodor – 02. Dec. 2009
Save Energy with State-of-the-Art UPS
systems size with minimal oversizing, „hot-add“ power if needed
 very high efficiency, even at low load and in redundant configuration,
Values for 100% load are not sufficient for E.eff. installations

11. APC by Schneider Electric – Eduard Bodor – 02. Dec. 2009
Sample: Saving by right sizing
Given: 1 MW of IT power
Increase efficiency factor of UPS
from 0.92 to 0.96 saves
58.856,- €/a
or
294 tons CO2/a

12. APC by Schneider Electric – Eduard Bodor – 02. Dec. 2009
IDC Research
● “Through it’s research IDC has found that an increasing number of
datacenters are close to reaching their power and cooling thresholds, or are
anticipating doing so in the near future.”
● “This in turn is constraining IT’s ability to expand to keep pace with business
requirements, as well as increasing the risk of failures associated with
hotspots in the datacenter.”
● “IDC believes datacenter operators will require enhanced tools to optimize
energy efficiency and to maximize capacity within their environments.”
● “The cost to power and cool the installed base of servers is increasing a
growth rate that is four times the growth rate of new server spending.”
● Surce: September 19, 2008

13. APC by Schneider Electric – Eduard Bodor – 02. Dec. 2009
Optimising the Datacenter cooling
●rising the acceptable air-inlet-temperature of the
IT-equipment to 20 -26°C leads to higher efficiency
●higher the chilled water temperature (e.g. 12°C instead
of 6°C) means that the compressor needs less power
●use of chilled water allows the „indirect free cooling“
(Eco-Mode) which is even more efficient with higher chilled
water temp and higher air inlet temps
●avoid dehumidifying by higher heat exchanger temps
saves the additional humidifying energy
Savings:
~ 4% per °C
10-15%
~ 33%
3-5%

14. APC by Schneider Electric – Eduard Bodor – 02. Dec. 2009
Gartner Rerearch
●The most important result - Containment hot or cold aisles can reduce
data center energy costs by 30%.
●“For any data center that is under pressure to cut costs or that just
wants to improve energy efficiency, containment can provide a method
for substantially reducing energy costs associated with cooling and can
extend the capacity of cooling plants.”
●“Hot-aisle containment is well-suited for new data center construction or
for extensive data center renovation projects.”
●“Hot-aisle containment is typically implemented using specialized racks
with in-row cooling (such as the APC InfraStruXure system), or by
establishing other types of barriers to contain the exhaust air in the hot
aisles”
● Source Gartner Research Publication Date: 17 October 2008

15. APC by Schneider Electric – Eduard Bodor – 02. Dec. 2009
Hot Air Containment Systems !
High density and high efficiency
over 30 kW
of cooling
per rack
possible

16. APC by Schneider Electric – Eduard Bodor – 02. Dec. 2009
Cooling/Power savings by Fan Laws
Operating Point A:
RPM = 250
Static pressure (SP) = 1,2 bar
Power consumption (P) = 35Watt
What happens if we change the air
flow demand to be tripled?
Air Flow related directly to RPM:
=> RPM triples = 750
SP varies as the square of RPM:
=> SP = 10,8 bar
(Not important for our discussion)
Power consuption raises by power of 3:
=> Power consumtion = 900 Watt
Operating Point B:
RPM = 750
Static pressure = 10,8 bar
Power consumption = 945Watt
SP (new) RPM (new)
SP (old) RPM (old)
=( )
2
P (new) RPM (new)
P (old) RPM (old)
= ( )
3
AirFlow (new) RPM (new)
AirFlow (old) RPM (old)
=

17. APC by Schneider Electric – Eduard Bodor – 02. Dec. 2009
●APC White Paper Nr. 113
„Electrical Efficiency Modeling
of Data Centers”
●APC White Paper Nr. 114
„ Implementing Energy Efficient Data Centers”
●APC White Paper Nr. 157
“Metric for DC Efficiency”
●many more White Papers focusing on all
aspects of IT-Infrastructure
Improvements

18. APC by Schneider Electric – Eduard Bodor – 02. Dec. 2009
0
5
10
15
20
25
30
35
40
45
IT Power Cooling
Legacy
State-of-the Art
Conclusion: up to 40% overall savings possible !

19. All content in this presentation is protected – © 2008 American Power Conversion Corporation
Thank you very much
for your interest and attention !
reference installation at Frankfurt Airport, Germany