Maximize Efficiency in Your Data Center: Liebert® DSE, the Industry’s Most Efficient Cooling System Energy Consumption in DX Systems Condenser Fans 13% Evaporator Fans 17% Compressor 70% Pumped Refrigerant System Cooling Mode Outdoor Temp Cooling PUE Full Compressor 95 1.28 Condenser: 3.9 kW Pump: 0 kW Refrigerant Pump Electronic expansion valve Evaporator: 3.2 kW Compressor: 17 kW Evaporator Condenser Compressor Pumped Refrigerant System Cooling Mode Full Compressor Partial EconoPhase Full EconoPhase Outdoor Temp Cooling PUE 95 1.28 65 1.17 45 1.09 or lower Condenser: 3.9 kW Pump: 1.2 kW Refrigerant Pump Electronic expansion valve Evaporator: 3.2 kW Compressor: 0 kW Evaporator Condenser Compressor Pumped Refrigerant Cycle Heat Density 8000 LIQUID LIQUID/VAPOR MIX 6000 VAPOR 5000 btu/ft^3 PRESSURE 7000 4000 3000 2000 1000 0 Water ENTHALPHY Refrigerant EconoPhase Hours Liebert® DSE with EconoPhase Benefits Annual Energy Usage 450 Annual Utility Cost ($1000’s) 400 350 300 60% 250 200 • • • 150 • 100 50 • 0 DX with Water-Side Economizer Chilled Water with Air-Side Economizer Liebert DSE with EconoPhase Liebert DSE with EconoPhase Pumped Refrigerant Economizer Cooling PUE 1.3 - 1.05 No water usage No water treatment No outside air contamination No dampers and louvers to maintain Instant, automatic economizer changeover