ROI for Energy Saving Initiatives Zahl Limbuwala 21

ROI for Energy Saving Initiatives
Zahl Limbuwala – Chairman DCSG / CEO Romonet Ltd
21st June 2010
Overview
• The Carbon Context
• The Reality - Demands & Constraints
• Metrics & Harmonisation
• What really matters?
• BCS Software Demo - Quantifying Return on Investment
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Context
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3
The Reality
Constraints
Requirement for
Granularity of Carbon
Footprint Measurement
Demands
Power Availability
Rising Power
Consumption of IT
Devices
Power Cost
Carbon Cost
(Offset, Cap &Trade)
Data Centre
Operators
Brand Value
(CSR)
Rising Demand for
IT Services
Business Continuity
Regulation
Requirement for
Improved Efficiency
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Metrics & Harmonisation
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Productivity Proxies
RER
PUE / DCIE
DCEP
• PUE – Power Usage Effectiveness
• DCIE – Data Center Infrastructure Efficiency
• RER – Reuse Energy Ratio
• DPPE – Data Centre Performance Per Energy
• DCEP – Data Centre Energy Productivity
DPPE
Metrics
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What really matters?
$ € ¥
Cost Efficiency = Energy Efficiency = Carbon Efficiency
kWh - CO2
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Data Centre Model
Server Workloads
Proportion
IT Workload
0
20
40
60
80
100
Percent Load
Server Power Utilisation by Load
500
Watts
400
300
200
100
0
0%
20%
40%
60%
80%
100%
IT Device Load to
Power Function
Load
Input Power
kW
Data Centre Power Transfer Functions
1,800
1,600
1,400
1,200
1,000
800
600
400
200
0
0
200
400
600
IT Electrical Load (kW)
800
1,000
Data Centre Power
Transfer Function
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Energy Cost
CRAC Load
Location
Air Flow
Data Centre Layout
Carbon
Intensity
Energy Use
Power Cost
Chiller
Climate
CRACs
Air Flow
UPS
PDUs
IT Device
Application
Workload
Variation
Source of Energy
Everything Else
Time
Climate
Time
Total Thermal Losses
Total Thermal Losses
Electrical Load
Electrical Load
Workload
Time
What is simulation?
BCS Simulator Understands Variability
Data Centre Metrics
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Logical Layout
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Understanding DCIE/PUE
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Data Centre Simulation
What is Simulation?
Scenario 1 – Large FS data centre
Results Analysis
Scenario 2 – Small office building data centre
Results Analysis
Data Centre Metrics
12
Scenario 1
Base Scenario
• 3.5 MW design IT capacity
• 2N+1 Infrastructure
• Running at 90% of rated capacity
• Using the old ASHRAE spec (45-55% RH)
• Poor airflow management
• No power management
• No virtualisation
Data Centre Metrics
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Scenario 1
Base Scenario
• Located in London
• Chilled water / Dry cooler design
• Power cost of 8p/kWh rising to 10.5p/kWh
• Carbon intensity of 0.573kg / kWh
Data Centre Metrics
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Scenario 1 – Implement EU CoC
Implement EU Code of Conduct Best Practices
• Airflow management (aisle containment)
• Variable Speed Drives in the CRAC units
• New ASHRAE spec
• Enable power management on servers
Data Centre Metrics
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Scenario 1 – Implement Economiser
Implement Economiser
• Airflow management (aisle containment)
• Variable Speed Drives in the CRAC units
• New ASHRAE spec
• Enable power management on servers
• Implement an indirect waterside economiser
Data Centre Metrics
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Scenario 1 Comparison
4-Year Cost / Energy / Carbon Analysis
Scenario
Energy (GWh)
Carbon (Tons)
Energy Cost
Base
231
122,000
$43.4m
Implement EU CoC
168
89,000
$31.6m
EU CoC +
Economiser
147
78,000
$30.2m
Savings
84
44,000
$12.7m
Data Centre Metrics
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Scenario 2
Base Scenario
• 100 kW design IT capacity
• N+1(cooling) N (power) Infrastructure
• Running at 60% of rated capacity
• Wall mounted DX units (no humidity control)
• Poor airflow management (open racks)
• 100 Dell servers (2007 vintage) (2U)
• No power management
• No virtualisation (5%-10% utilised)
Data Centre Metrics
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Scenario 2
Base Scenario
• Located in an office in London (shared Transformer)
• Power cost of 8p/kWh rising to 10.5p/kWh
• Carbon intensity of 0.573kg / kWh
Data Centre Metrics
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Scenario 2 – Virtualisation Programme
Virtualisation Programme
• Replace old Dell servers – 2009 Energy Star 2U Dell
• Reduce from 100 to 10 servers
• Enable power management
Data Centre Metrics
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Scenario 2 Comparison
Virtualisation Programme Analysis
Scenario
Energy (GWh)
Carbon (Tons)
Energy Cost
Base
3
1650
$583k
Virtualisation
Programme
1.8
978
$348k
Savings
1.2
672
$235k
Data Centre Metrics
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Summary
Data Centre Simulator – Free for BCS members
Simulator core code is open source
Thank You
Zahl Limbuwala
[email protected]
Data Centre Metrics
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