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
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