Liebert DSE 250

LIEBERT DSE HIGH EFFICIENCY THERMAL MANAGEMENT
Liebert
DSE 250
*Additional Notes
1
DX SPLIT SYSTEMS (CRAC UNITS)
APPLICATIONS
• Perimeter or in gallery
• Multiple heat rejection configurations
ADVANTAGES
•
•
•
•
Highly reliable
Modular build outs
Easy to deploy
No water, no outside air
CHALLENGES
• Historically not as efficient as alternatives
LIEBERT DSE:
HIGH EFFICIENCY DX THERMAL MANAGEMENT
*Additional Notes
3
LIEBERT DSE – OVER 3,500 UNITS INSTALLED GLOBALLY
Cooling
Mode
Full
Compressor
Partial
EconoPhase
Full
EconoPhase
Condenser: 3.9 kW
Refrigerant Pumps: 1.2 kW
Refrigerant
Pump
Condenser
Outdoor
Temp
Cooling
PUE
95
1.28
65
1.17
45
1.09
PUE as low as 1.05
Full Economizer Mode
Electronic
expansion valve
Evaporator: 3.2 kW
Evaporator
Compressor
Reliable, Low-Maintenance Operation
• No water usage, No water treatment
• No outside air contamination
Compressor: 17 kW
• No dampers and louvers to maintain
• Instant, automatic economizer changeover
4
FREE-COOLING HOURS WITH PUMPED REFRIGERANT
ECONOMIZATION
Free Cooling Optimization Based on Temperature AND Load
Economization Hours
Economization Hours
95% Economization = Refrigerant Economizer with DX Backup
OVERALL DSE PRODUCT LINE
DA050
DSE Small
• 50 kW
• 7,000 CFM
• 77”x35”x76”
(LxDxH)
DA080
DA085
DSE Medium
• 80-85 kW
• Up to 10,400
CFM
• 100”x35”x76”
(LxDxH)
• Downflow and
upflow
DA125
DA150
DA165
DSE Large
• 125-165 kW
• Up to 24,000
CFM
• 144”x47”x76”
(LxDxH)
New Model:
DA250
DSE xLarge
• 250 kW
• Up to 40,000
CFM
• 120”x84”x135”
(LxDxH)
• Under-floor or
front discharge
NEEDS DRIVING DSE 250 DESIGN
1) Reduced Unit Count
• Recent movement to larger and larger suites
• Desire for fewer units and less complexity
47”
2) Non-Raised Floor Designs (Fan Wall)
• Colo pursuing large hyperscale tenants
• No raised floor = reduced cost
88”
3) High Density Data Center Suites
• Trend toward designs for up to 300 W/ft2
• Wall space becomes critical limiting factor in
these high density deployments
• Additional airflow to manage ∆T
84”
120”
*Additional Notes
7
KEY CONSIDERATION FOR LARGE DATA CENTERS: DELTA T
Data Center Temperatures: Cabinet vs. Cooling Unit ∆T
•Difficult to obtain perfect separation between hot and cold air
•Cooling unit ∆T and Server ∆T do not always match (server ∆T is always higher)
Peak Power Usage and ∆T: DSE 165
Cooling Capacity Indoor Fan Total Peak
Unit ∆T
(kW)
kW
kW
90°F
95°F
65°F
65°F
Peak Cooling
PUE
20
178
21.9
74
1.41
Wasted Fan kW
22
190
14.2
66
1.35
25
199
12.7
64
1.32
Balanced
“Sweet Spot”
28
199
11.2
63
1.32
32
193
7.14
59
1.30
35
188
5.37
57
1.30
High Efficiency,
High Return Air
Source: Upsite Technologies
*Additional Notes
8
DSE 250 SPECIFICATIONS
47”
88”
84”
Performance
• 250 kW at 33,500 CFM
• Rating Pt: 74°F Supply - 99°F Return at
110°F ambient
• Option for 40,000 CFM for 22 degree dT
Packaging
• Separate fan and coil sections
• Split system with ability to place units side
by side
• All service from back (non-data center
side)
120”
*Additional Notes
9
WHAT COOLING DENSITY CAN WE SUPPORT?
Increased Load in Same Footprint = Higher Density
Perimeter units can support high rack densities with proper containment
Overall room cooling density (W/ft2) is limited by use of wall space (and unit length)
Example – 3.6 MW Room, 250 W/ft2, N+2 Cooling
Traditional Perimeter CRAC
Liebert DSE 250 “Fan Array”
*Additional Notes
10
APPLICATION COMPARISON – SPLIT VS PACKAGED
Packaged DSE 400 (Rooftop)
 No indoor footprint usage
 Fast outdoor installation
 Requires duct work
 Larger rooftop load may require
additional structural support
Split DSE 250 (Perimeter or Gallery)
 No duct work
 Lower rooftop loading
 Reduced overall footprint on
ground floor
 Zero leakage
 Uses indoor footprint
 Requires refrigerant piping
Packaged DSE 400 (Perimeter)
 No indoor footprint usage
 No rooftop loading
 Fast, simple installation
 Large overall outdoor footprint
 Airflow recirculation for multistory applications
*Additional Notes
11
DSE 250 LAYOUT OPTIONS
Front Discharge Non-Raise Floor
• Fully rear-serviceable
• No side clearance required
• Max 750 ft/min velocity at first rack
Under-Floor Discharge (Gallery)
• Fully rear-serviceable
• No side clearance required
• Full airflow with 36” floor and up
Under-Floor Discharge (Perimeter)
• Fully rear-serviceable
• No side clearance required
• Full airflow with 36” floor and up
*Additional Notes
12
LIEBERT DSE 250 DESIGN
Data Center Side
Service Side
Direct Drive
Supply Fans
(2 or 3 per unit)
Top Piping
Connections
Electronic
Expansion Valves
15-Degree Fixed
Louvers
No Side Access
Required
Tandem Digital
Scroll Compressors
Evaporator Slab Coil
with Face Filters
Condensate Pump
CAPACITY MEASUREMENT ACCURACY
Total Heat
Rejection
Refrigerant
Pump
Condenser
Return Air
Compressor
Air
Capacity
Evaporator
Tin, Pin
Tout, Pout
Refrigerant
Capacity
Supply Air
APPLICATION COMPARISON – SPLIT VS PACKAGED
Packaged DSE 400 (Rooftop)
 No indoor footprint usage
 Fast outdoor installation
 Requires duct work
 Larger rooftop load may require
additional structural support
Split DSE 250 (Perimeter or Gallery)
 No duct work
 Lower rooftop loading
 Reduced overall footprint on
ground floor
 Zero leakage
 Uses indoor footprint
 Requires refrigerant piping
Packaged DSE 400 (Perimeter)
 No indoor footprint usage
 No rooftop loading
 Fast, simple installation
 Large overall outdoor footprint
 Airflow recirculation for multistory applications
*Additional Notes
15
LIEBERT DSE 060 PACKAGED UNIT
Low Leakage
Weatherized Panels
Microchannel
Condenser
Applications:
Perimeter
• Top return, bottom supply
• Fans discharge directly onto
slab or into raised floor
• No additional curbs or duct work
required
Rooftop
•
•
Compressor
Cabinet
Fan Access
•
Pumped Refrigerant
Economizer
Bottom return, bottom supply
Supply or return in service
area
Curb or duct collar connection
Lab Overview and DSE 250 Technical Review
*Additional Notes
17