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Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.1
Optimization Strategy in Optimization Strategy in Energy Saving of Energy Saving of
Chiller Plant SystemsChiller Plant Systems
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.2
Objectives Objectives EPSS Energy OptimizerEPSS Energy Optimizer Deliver attractive, on-going economical
benefit through chiller plant energy saving, while Meet all demands at all times Preserve system-wide safety and integrity Improve day-to-day operation efficiency Impose no impact to install & maintain
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.3
What is EPSSWhat is EPSS EPSS is a patented and proven energy
saving solution for industrial and commercial chiller plant cooling applications
Product highlights Patented optimization strategy Unique system-based approach Proven track record of significant economical benefits Modular system design & layout Safe & easy to install & maintain Flexible to deploy & operate Eco-friendly
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.4
Chiller Plant OverviewChiller Plant Overview
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.5
Chiller Plant CyclesChiller Plant Cycles
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.6
Traditional Chiller PlantTraditional Chiller Plant
Subsystems Control Energy SavingCooling Tower Cooling Tower SubsystemSubsystem
Constant-speedcooling tower fans
Cooling Water Cooling Water SubsystemSubsystem
Constant-speed cooling water pumps
Chiller SubsystemChiller Subsystem Inlet guide vane load control
Primary Chilled Primary Chilled Water SubsystemWater Subsystem
Constant-speed chilled water pumps
Secondary Chilled Secondary Chilled Water SubsystemWater Subsystem
Variable-speed differential pressure control
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.7
Energy Saving in Pumps/FansEnergy Saving in Pumps/Fans Pump/Fan Characteristics
FlowRatioFlowRatio 1.0 0.9 0.8 0.7 0.6 0.5
PowerRatioPowerRatio 1.000 0.729 0.512 0.343 0.216 0.125
PowerSaving% 0.0% 27.1% 48.8% 65.7% 78.4% 87.5%
where KWi : Kilo Watts; and Qi : Flow
Energy saving Golden Opportunity via VFD C/T fans, CW pumps, CH pumps Now, the million dollar question: How exactly?
KW2KW1
=Q2Q1
3
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.8
EPSS EPSS Optimized Chiller PlantOptimized Chiller PlantSubsystemsSubsystems EPSS ModuleEPSS Module EPSS OptimizationEPSS Optimization
Cooling Tower Cooling Tower SubsystemSubsystem
Wet bulb temperature sensor VFD for cooling tower fans
VariableVariable--speed speed according to according to OA Enthalpy and optimization OA Enthalpy and optimization strategystrategy
Cooling Water Cooling Water SubsystemSubsystem
Condenser water temperature sensors
VFD for condenser water pumps CWP
VariableVariable--speedspeed according to according to load and optimization load and optimization strategystrategy
Chiller SubsystemChiller Subsystem No modification required other than proper chiller operating condition
As isNo change in chiller control & operating procedure
Primary Chilled Primary Chilled Water SubsystemWater Subsystem
Chilled water decouple line flow meter
VFD for chilled water pumps CHP
VariableVariable--speedspeed according to according to load and optimization load and optimization strategystrategy
Secondary Chilled Secondary Chilled Water SubsystemWater Subsystem
No modification required As isNo change in SCHP control
Monitoring & Monitoring & Control SubsystemControl Subsystem
EPSS Control & Optimization System (ECOP)
Control platform & optimization strategy
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.9
99
EPSS EPSS Chiller Plant Chiller Plant ptimizationptimization
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.10
EPSSEPSS CWP OptimizationCWP OptimizationFixed ECWT & Fixed % Load
Total KW = Chiller KW + CWP KW
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.11
CWP OptimizationCWP OptimizationFixed ECWT & Varying % Load
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.12
Optimization Cost FunctionsOptimization Cost Functions
ECWT1 ECWT2 ECWT3
ECWT6ECWT5ECWT4
Varying ECWT & Varying % Load
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.13
Optimization StrategyOptimization Strategy Unique System Approach Total Cost Function
( )
( ) ( ) ( ) ( )tKWtKWtKWtKW
LoadWBTtKWKW
ChillerCHPCWPTCt
tTotal
+++=
=
/
%,,
System-Based Constrained Optimization
LoadandWBTgivenatTandTforvalueslowandhighoptimaltheareTandTwhere
TTTTTT
KW
LL
LL
HILLL
LLLOLTotal
MMMMMMMMM
HICHPCHPLOCHPHIGGLOGHILLLOL
%:
21
*2
*1
22*2
*111min
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.14
US Patent No.: 6446448US Patent No.: 6446448
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.15
System Architecture System Architecture -- EPSSEPSS
DecoupleLine
Flow Sensors
CondenserWater
TemperatureSensors
System Panel
VFDPanels
Ethernet
ChilledWater
TemperatureSensors
WBT Sensor
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.16
LLXXXX EPSSEPSS InstallationInstallation
System panelSystem panel VFD panels for CHPVFD panels for CHP
VFD panels for CWPVFD panels for CWP
VFD panels for CTFVFD panels for CTF
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.17
LLXXXX M&V SummaryM&V Summary Verification: Validate real-time long-term performance
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.18
DDXXXX Chiller PlantChiller Plant
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.19
DDXXXX System LayoutSystem Layout
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.20
DDXXXX EPSS EPSS InstallationInstallation
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.21
DDXXXX M&V SummaryM&V Summary
1002 Total KW = 1920
1002
1003 Total KW = 2209
1003
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.22
Product HighlightsProduct Highlights Patented optimization strategy Unique system-based approach Proven track record of significant economical
benefits Modular system design & layout Safe & easy to install & maintain Flexible to deploy & operate Eco-friendly
Confidential&ProprietaryConfidential&Proprietary EPSGroup,Inc.EPSGroup,Inc.23
SummarySummary We are your best partner to work with you on
chiller plant energy saving and provide you with an optimum solution that Best match your application; Meet your goals on energy saving policy; Minimize energy consumption; Realize on-going economical benefit; and Reduce environment impact.
Objectives EPSS Energy OptimizerWhat is EPSSChiller Plant OverviewChiller Plant CyclesTraditional Chiller PlantEnergy Saving in Pumps/FansEPSS Optimized Chiller PlantEPSS Chiller Plant ptimizationEPSS CWP OptimizationCWP OptimizationOptimization Cost FunctionsOptimization StrategyUS Patent No.: 6446448System Architecture - EPSSLXX EPSS InstallationLXX M&V SummaryDXX Chiller PlantDXX System LayoutDXX EPSS InstallationDXX M&V SummaryProduct HighlightsSummary