04 IEV2011 Chlr Plant Auto

8/2/2019 04 IEV2011 Chlr Plant Auto

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Middle East and India Engineer Visit 2011 | Control Your Game

Control Your Game

Lowest First Cost AND Lowest Life Cycle Cost

Peter Thomsen, P.Eng.Director Systems CSG

Ultra-Efficient Integrated Chiller Plant Automation


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Up to 60% savings

Reliable system

Flexibility

Integration with BAS

Remote access

Off the shelf package (fieldadjustable parameters)

Ultra Efficient Chilled Water Plant ControlFor The All-Variable Speed Plant


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Armstrong Solution: IPC 11550IPC = Integrated Plant Control

Does not use typicalanalogue era PID feedbackloop control

Employs digital era DemandBased Control

What is Different?


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Conventional PID Feedback Loop Control

Challenges:

Multiplereset points

Comfort

Hunting

Silooperationnot plantefficiency

PID FB LOOP

PID FB LOOP

PID FB LOOP


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More Than50% of Time

Spent atPart load

Comfort Cooling Is A Part Load Application


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Comfort Cooling Is A Part Load Application

Dubia Chilled Water Plant Load Profile

0.00%

2.00%

4.00%

6.00%

8.00%

10.00%

12.00%

14.00%

5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

Percent Plant Load

PercentOperatingHou

rs

15.00

17.00

19.00

21.00

23.00

25.00

27.00

29.00

31.00

33.00

35.00

WetBulbTemp(C)

wetb F OR

wetbulb

More Than50% of TimeSpent atPart load


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Variable Speed Devices AreMore Efficient At Part Load By Design

Different Performance CurvesDifferent Method Of Control

Variable Speed Chiller COP (Centrifugal)

0

2

4

6

8

10

12

14

0% 20% 40% 60% 80% 100

% Chiller Load

C

OP

12.8 Deg C

18.4 Deg C

23.9 Deg C

29.5 Deg C

Constant Speed Chiller kW/ton (Centrif.)

0

2

4

6

8

10

12

14

0% 20% 40% 60% 80% 100%

% Chiller Load

COP

12.8 Deg C

18.4 Deg C

23.9 Deg C

29.5 Deg C


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Percent Efficiency Advantage of VS Chiller

0%

50%

100%

150%

200%

250%

0% 20% 40% 60% 80% 100%

% Chiller Load

%EffAdvantageCOP

12.8 Deg C

18.4 Deg C

23.9 Deg C

29.5 Deg C

Variable Speed Chiller Part Load Advantage

With VariableSpeed Chillers,

There is anSubstantial

Advantage WhenRun at Part Load


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Typical Centrifugal Chiller Schematic

Compressor

Q (out to tower) 54F

44F

Q (in from load CHW)

Expansion Valve

Evaporator (Low T,

Low P)

Condenser

(high T, Hi P)

Q in from Bldg

Reduce

Load

Lower

ECWT

Raise

CHWST

Variable Speed Chiller(Power ~ Speed3 Relationship)

Three Ways ToAchieve Speed

Reduction of theCompressor;

- Load Reduction

- Lower Entering

Condenser Water

- Raise CHW SupplyTemperature


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Integrates: all fans / pumps / chillers with variable speed

Performance Improvements better than 30%, up to 60%

Based on Hartman LOOP Technology

Natural Curve Sequencing

Equal Marginal Performance Principle

Demand Based Control

Armstrong Ultra-EfficientChiller Plant Automation


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0

2

4

6

8

10

12

14

0% 20% 40% 60% 80% 100%

% Chiller Load

COP

12.8 Deg C

18.4 Deg C

23.9 Deg C

29.5 Deg C

IPC system

Capacity Based

Natural Curve Sequencing VsTraditional Capacity Based


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0

2

4

6

8

10

12

14

0% 20% 40% 60% 80% 100%

% Chiller Load

COP

12.8 Deg C

18.4 Deg C

23.9 Deg C

29.5 Deg C

IPC system

Capacity Based

Natural Curve Sequencing VsTraditional Capacity Based

Sequence as closeas possible to the

natural curve


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Natural Curve Approach TempVariable Flow Tower and Fan Speed

0

2

4

6

8

10

12

14

13.4C / 33% 19.5C / 67% 25C / 100%

ETW

ApproachTem

perature(DegC)

AtIdenticalTowerF

an&PumpPower

Tower Staging

VS VF Tower

33% of

Maximum

Power

67% of

Maximum

Power

100% of

Maximum

Power

Lower theenteringcondenserwater

temperaturewith variableflow towersand naturalcurvesequencing


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3 loops and 4 variables can not be

controlled by PID feedback loopcontrol

Equal Marginal Performance Principle

Minimum plantpowerconsumption whenat EMPP.

1 kW added to anydevice results inthe same netcapacity change tothe plant (kWcooling)


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EMPP Power relationships unit of input vs. unit of output

Demand Control replaces PID control

Control based on actual demand for cooling

Higher comfort level at lowest cost

EMPP and Demand Based Control


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Primary pumps / Distribution pumps, respond to building call forcooling

Calculate Demand, by observing compressor kW, and building load.If Demand change greater than dead band, proceed to next step.

Adjust cooling tower fan speed and tower pump speed according toEMPP Power relationships

Adjust chiller supply temperature set-point for new load point

Determine if a chiller is to be staged on or off to remain close to the

Natural Curve.

Repeat above.

Demand Based Control


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4 Chiller Plant

2400 ton, 4 x 800ton

8440 kWc, 4 x 2810kW

3 Duty / 1 Standby

Dubai

Variable Primary

Flow

All Variable Speed

Energy Analysis: VPF (reset) VersusArmstrong All-variable Speed

Load and Weather Profi le

0

2

4

6

8

10

12

14

5 10

15

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

PercentOperating

Ho

0

5

10

15

20

25

30

35

WetBulbTemp

% timeat load

wetbulb


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Equipment Sequencing

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

Percent Plant Load

UnitsEquipment

Runn

#Towers IPC

# Towers Base Case

# Chillers IPC

# Chillers Base Case

4 Chiller Plant

2400 ton, 4 x 800ton

8440 kWc, 4 x 2810kW

3 Duty / 1 Standby

Dubai

Variable Primary

Flow

All Variable Speed



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Cooling Tower Power and LTWT

0.00

50.00

100.00

150.00

200.00

250.00

300.00

350.00

5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

0

5

10

15

20

25

30

35

40

TOWER POWER kW IPC

TOWER POWER kW basecase (75F Reset)

LTWT IPC

LTWT base case

4 Chiller Plant

2400 ton, 4 x 800ton

8440 kWc, 4 x 2810kW

3 Duty / 1 Standby

Dubai

Variable Primary

Flow

All Variable Speed



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Chiller Conden ser Temp eratures

0

10

20

30

40

50

60

5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

Percent Plant Load

Temperature

Deg

ETWT IPC

LTWT IPC

ETWT Base Case

LTWT base case

Max Refrig Temp IPC Req'd

Max Refrig Temp Base Case Req'd

4 Chiller Plant

2400 ton, 4 x 800ton

8440 kWc, 4 x 2810kW

3 Duty / 1 Standby

Dubai

Variable Primary

Flow

All Variable Speed



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4 Chiller Plant

2400 ton, 4 x 800ton

8440 kWc, 4 x 2810kW

3 Duty / 1 Standby

Dubai

Variable Primary

Flow

All Variable Speed


Chiller Efficiency At Plan t Load

0

1

2

3

4

5

6

7

8

9

10

5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

Percent Plant Load

PlantEfficiencyC

Chiller COP

Chiller COP


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IPC All VariableSpeed Plant AnnualEnergy Savings 25%.

Dubai

Annual Average

COP for wholeplant;

Variable PrimaryFlow 4.1

All Variable Speed

5.4


Chiller Plant Efficiency

0

1

2

3

4

5

6

7

5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

Percent Plant Load

PlantEffCO

COP IPC

COP Base Case

COP 5.4

COP 4.1


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Armstrong Solutions: Ultra-Efficient ChilledWater Plant Automation

IPC 11550 System OPTI-VISORTM

Integrated Plant Control

(IPC) System


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Full plant automation

Remote Access

BMS Read/Write Email alarms

Equipment Data

User Friendly Interface

10 Year Data Capacity

Factory Built & Tested

Armstrong Solutions: Integrated PlantControl (IPC) 11550 System

Ultra-EfficientChilled Water Plant Automation


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Armstrong Solutions: OPTI-VISOR

Advisor to BMS (BMSexecutes automation)

Remote AccessPlug and Play to BMS

Equipment Data

User Friendly Interface

Factory Built & Tested

Accelerated Paybacks

Ultra-EfficientChilled Water Plant Automation


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Plant Automation Retrofit Impact

SAVINGS2530%

OPTI-VISOR

Installed onVariable PrimarySystems,upgrading toAll-variable


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OPTI-VISOR Retrofit Impact

Accelerated

Paybacks

LowImplementationcosts


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OPTI-VISOR Retrofit Simplicity

Convert Cooling tower and pumps tovariable flow / speed

BMS serial link to CW pumps

Install OPTI-VISOR and serial link to BSM

Update BMS algorithms to execute onOPTI-VISOR signals

Commission

One Year ECO-PULSE Health ManagementService


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ECO*PULSETM Health Management System

Web Based Asset Management Service

Real time predictive performance assessments

Quarterly Reports

Data compliance for 189.1

Trouble shooting recommendations

Time of use utility rate schedule

Scheduled Event Pre-conditioning

Comfort Assessment

Environmental Impact Trending

Bench Marking



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Why is

ECO*PULSE

Needed?

ECO*PULSETM Health Management System

Saves the owner money

Confirms that plant operates as predicted

Eliminate risk of human nature cannot

humanly monitor all trends to detect systemissues

Provided on an Annual Subscription basis



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Health Management

System

IPC 11550

OPTI-VISOR

ECO*PULSE

Armstrong Plant Automation

Ultra-Efficient

Improved Comfort

Health Management

Lower Project Risk

Minimize Performance RiskWorld Class Project Results

Energy Analysis for LEED orother Building AnalysisTools


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IPC 11550

OPTI-VISOR

ECO*PULSE

Armstrong Plant Automation

04 IEV2011 Chlr Plant Auto

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