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Earthwise System and Green Mark Version 4 Update

,

8:00 to 11:00am

Venue: Riverfront Ballroom 1, Level 2

Lee Poh Seng

s u s t a i n a b I l I t y

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EarthWise Systems?

EnergyEnergyEfficiencyEfficiency

EmissionsEmissions

s u s t a i n a b I l I t y

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Number of EarthWise Systems

Chilled water/VAV systems

Low flow, low temperatureg e c ency sys ems

a o ey o

Wh use them?

s u s t a i n a b I l I t y

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Low Flow, Low Temperature,High Efficiency Systems

+/+/--$$ ~/~/ $$

+/+/--$$

air handlers ductwork

--controls

--i in

~~

s u s t a i n a b I l I t y

chillers

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Number of EarthWise Systems

Chilled water/VAV systems

Low flow, low temperatureg e c ency sys ems

a o ey o

Wh use them?

s u s t a i n a b I l I t y

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How?

Supply temperature Flow rates Fans

Ductwork

Temperature differential Pump

Piping

s u s t a i n a b I l I t y

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Number of EarthWise Systems

Chilled water/VAV systems

Low flow, low temperatureg e c ency sys ems

a o ey o

Wh use them?

s u s t a i n a b I l I t y

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Why Use LLH Systems?

Good for business: Offers the potential tolower first cost and/orand/oroperating cost whileenhancin comfort IAQ and acoustics

Environmentally responsible: Reduced utilitygenera e green ouse gas em ss ons anuses less natural resources

Ideal for use in health care, institutional,governmen a , o ce u ng, e uca on, another markets where VAV systems are used

s u s t a i n a b I l I t y

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Chilled Water Systems

s u s t a i n a b I l I t y

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Chilled Water Systems

9%

51%17%

Cooling tower

s u s t a i n a b I l I t y

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History of Chiller Performance

8.0

PCentrifugal

y,

CO

6.0

Screw150-300 tons

icienc

Scroll

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Cool More or Pump More?

Pump efficiency 70%

COP 0.7

Chiller COP 7.0

Chiller COP 10x the pump COP

Conclusion work your most efficient

s u s t a i n a b I l I t y

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Show Me the Impact

Cooling towers

Cooling coils

Pumps

Chillers

Air handlers

Controls

s u s t a i n a b I l I t y

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waterside example

Cooling Tower Performanceons

95/85/78 98/83/78

2400 GPM 1600 GPM

10F range 15F range

7F approach

5F approach

40 hp

40 hp

s u s t a i n a b I l I t y

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waterside example

Cooling Tower: Size?, Cost?

95/85/78 98/83/78 100/85/78

2400 GPM 1600 GPM 1600 GPM

10F range 15F range 15F range

7F approach 5F approach 7F approach

40 hp

40 hp

p

Same Tower Smaller Tower

s u s t a i n a b I l I t y

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lessons learned

Cooling Tower Performance

!Tower waters ou e o

Towers should use

inverters

s u s t a i n a b I l I t y

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Show Me the Impact

Cooling towers

Cooling coils

Pumps

Chillers

Air handlers

Controls

s u s t a i n a b I l I t y

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Cooling Coil

MBH 504 504

WTR 10F 16F

.

.

GPM 101 63.0

.

s u s t a i n a b I l I t y

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Chilled Water Pump (800 tons)

Flow rate 1920 gpm 1200 gpm

Pump head 110 feet

49 feet

Pump efficiency 80 pct

80 pct

Pump power 52 kW

16 kW

a 37.5% reduction in flow =

nearly 70% reduction in chilled waterum in ener consum tion

s u s t a i n a b I l I t y

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lessons learned:

Cooling Cool Performance

!Chilled water

s ou e co

s u s t a i n a b I l I t y

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Show Me the Impact

Cooling towers

Cooling coils

Pumps

Chillers

Air handlers

Controls

s u s t a i n a b I l I t y

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Cooling Coil

MBH 504 504

WTR 10F 16F

.

.

GPM 101 63.0

.

s u s t a i n a b I l I t y

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waterside example

Chiller Energy (800 tons)

Ca acit 800 tons

LWT 44F

Power 464 kW

Power 490 kW

s u s t a i n a b I l I t y

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lessons learned

Chiller Performance

Factory witness tested

s u s t a i n a b I l I t y

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Show Me the Impact

Cooling towers

Cooling coils

Pumps

Chillers

Air handlers

Controls

s u s t a i n a b I l I t y

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Airside: What is different?

Common Low air

prac ce emp.sys em

Room setpoint 75F

77F

Airside delta T 20F 32F

Interior zone SAT 55F 55 60F

Lowers the re uired air flow b 30-40%

s u s t a i n a b I l I t y

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air handler options

Fan Room Floor Area

$$$

s u s t a i n a b I l I t y

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Air Handler Options

Air CFM area velocity velocity hp

55F 18,750 34.1 2514 550 17.8

45F 11,360 20.8 2225 546 12.8 , . .

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EarthWise System

Airside Benefits

ma er s, an co s, oxes

s u s t a i n a b I l I t y

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What about Condensation?

Cold surfaces must be kept inside thehumidity controlled envelope

Night set back and morning pull down

no condensation and IAQ

Install a vapor barrier with reasonablecons ruc on

drains correctly LEED - WEc1.2

s u s t a i n a b I l I t y

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HVAC Equipment

Draw-Thru Trapping

Total Trap Height T = D + H

where D = trap depth = H + dH = air-handler casing pressure + 1 in. wg

s u s t a i n a b I l I t y

d = drain pipe diameter

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For more information:

This document coversthese key points:

Provide a good moisture barrieraround controlled spaces

Put indoor HVAC equipment inside

Actively control the space dew

SYS-AM-15

s u s t a i n a b I l I t y

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Show Me the Impact

Cooling towers

Cooling coils

Pumps

Chillers

Air handlers

Controls

s u s t a i n a b I l I t y

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Optimized Controls

s u s t a i n a b I l I t y

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Chiller tower optimization

400

kW

300

tion,

chiller

sum

200 control point

yco

100

ener

27 28 29 30 31260

32

con enser waer empera ure,

s u s t a i n a b I l I t y

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EWS is a design processWaterside & Airside

Low flow

Low temperature

ductworkductworkair handlersair handlers

First Cost Operating Cost

+$+$con roscon ro s

s u s t a i n a b I l I t y

p png,pumps

p png,pumps

chillerschillers

++

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What Did We Say RegardingLow Flow, Low Temperature,

What they do?

How they do it? EnergyEfficiencyWhy use them?

Emissions

s u s t a i n a b I l I t y

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ues ons or

s u s t a i n a b I l I t y