2.2.e. Chiller vs Vrf_multi v III

Copyright 2012 @LG Electronics / AC Company All Rights ReservedMULTI V III vs CHILLER 0

VS.

CHILLER SYSTEMCHILLER SYSTEM


1. Design Comparison

VRF is very simplified refrigerant piping system. More flexible VRF is very simplified refrigerant piping system. More flexible than water piping.than water piping.

Chiller

MULTI V III (VRF)Chiller system

Outdoor unit (air-cooled type) Indoor unit Refrigerant piping

Chiller FCU (Fan Coil Unit) AHU (Air Handling Unit)

Systemcomposition

Feature

Cooling tower Water piping, Duct working Water pumps

System concept

DesignDesign CommissioningOperation MaintenanceInstallation Reliability


Network

Feature Chiller system

Complicated wiring

MULTI V III (VRF)

Simple wiring


Easy network wiringEasy network wiring

1. Design Comparison Network design

ACP


1. Design Comparison Total management


[Manufacturer]

VAV boxes supplier

Controlsystem

Feature Chiller system MULTI V III (VRF)

(For VRF) M(For VRF) Manufactureranufacturer

provide all equipmentprovide all equipment

Simple control structureNo additional control provider

Central control and energy monitoring with low cost available

Complicated control structure, additional control manager in the system needed, increasing cost

Third part control provider needed, interconnectivity problems.


Design Commissioning

MULTI V III (VRF)Chiller system

The systems condition only the necessary rooms with regard to user demands.

The systems commonly condition the entire building at predetermined times, with no regard to user demands.(very hot midnight, weekend, holiday etc)

Capacitycontrol

Feature

After office hours operation, VRF could be operated for the userAfter office hours operation, VRF could be operated for the user

demands.demands.

Operating Area

< Limited operation>

Individual operation

OperationOperation MaintenanceInstallation Reliability

2. Operation Comparison


Temperaturecontrol


Require1 or 2

MULTI V III (VRF)

Very precise 0.5

Precise temperature controlPrecise temperature control

3030

2525

2020

1515

1010 2020 3030 4040 5050 6060 7070

CoolingCooling

MIN.MIN.

Chiller system MULTI V system

R

o

o

m

t

e

m

p

.

R

o

o

m

t

e

m

p

. 0.5 0 C from set point

Design CommissioningOperationOperation MaintenanceInstallation Reliability

Temp. control2. Operation Comparison


VRF system doesnVRF system doesnt need a duct space.t need a duct space.

SpaceEfficiency

Feature MULTI V III (VRF)

Small refrigerant space

Chiller system

Large duct space

Design CommissioningOperation MaintenanceInstallationInstallation Reliability

Space (Duct working)3. Installation Comparison


Chiller

Pump

Boiler

Coolingtower

(On the rooftop)

(Machine room drawing)

OutdoorUnit

(On the rooftop)

(Rooftop drawing)

VRF system is no need for a machine room. VRF system is no need for a machine room.

Installationspace

Feature MULTI V III (VRF)

No need a machine room

Chiller system

Need a machine room


Installation space3. Installation Comparison


Efficient use of space is possible for VRF systemEfficient use of space is possible for VRF system

Chiller system

SpaceEfficiency

Feature

P P

1/3

CHILLER SYSTEMCHILLER SYSTEM

Large pipe shaft is needed for water piping

MULTI V III (VRF)

VRF SystemVRF System

Small pipe shaft is needed


Space (Pipe shaft)3. Installation Comparison


VRF system expansion is very easy with extra outdoor & indoor unVRF system expansion is very easy with extra outdoor & indoor unit.it.

Chiller system

SystemExpansion

Feature

Capacity addition is difficult as additional mechanical room, pump, cooling tower,panel and piping is required.

MULTI V III (VRF)

System Expansion is Easy

+


System expansion3. Installation Comparison


1 step Commissioning6 steps Commissioning

MULTI V Plus

(VRF)Chiller system

Commissioning

Feature

There are a lot of commissioning points for the chiller systemThere are a lot of commissioning points for the chiller system

6 Steps Commissioning 1 Step Commissioning

Water cooled chiller (3)

(4)

Design CommissioningCommissioningOperation MaintenanceInstallation Reliability

NO. of commissioning point4. Commissioning Comparison


Maintenance

Feature

Maintenance costs for a Multi V is lower than chilled water systMaintenance costs for a Multi V is lower than chilled water systems.ems.

Water cooled chiller (3)

(4)

MULTI V III (VRF)

Filter cleaning Heat exchanger cleaning Cycle check by notebook (LG MV)

Chiller system Filter cleaning Duct cleaning Water pipe maintenance Periodical oil change, overhaul

Pump Water treatment Cooling tower cleaning

Design CommissioningOperation MaintenanceMaintenanceInstallation Reliability

Maintenance list5. Maintenance Comparison


(For Chiller Water treatment is required for clean water)(For Chiller Water treatment is required for clean water)

Watertreatment


Water treatment is required(deficient service can cause legionary disease in the system)

MULTI V III (VRF)

No water treatment is needed


Water treatment5. Maintenance Comparison


Scalecleaning


< The system is consist of refrigerant pipes >

No water pipes : No scale (use refrigerant) Need to clean the water pipesSystem efficiency drop & origin of germs

After 2~3year After 5~6year After 7~8year10% 25~30% 35~40%

thickness of scale

Energy Loss

Unit : mm

Unit : %

(For Chiller) Maintenance & cleaning periodically by exclusive c(For Chiller) Maintenance & cleaning periodically by exclusive companyompany


Scale cleaning5. Maintenance Comparison


Maintenance Staff5. Maintenance Comparison


MaintenanceStaff


(For Chiller) Certified maintenance staff is needed(For Chiller) Certified maintenance staff is needed

No need special maintenance staff. Economic and easy maintenance

The system requires certified maintenance staff not only for chillers but also pumps, boilers, cooling towers etc.

More expensive maintenance cost.

< Maintenance Staff>


Pipe Erosion6. Reliability Comparison

Design CommissioningOperation MaintenanceInstallation ReliabilityReliability

PipeErosion


(For Chiller) Certified maintenance staff is needed(For Chiller) Certified maintenance staff is needed

Refrigerant does not cause corrosion thereforeno pipe damage occurred

Pipe erosion can cause leakage. System capacity reduction. Brines use increase corrosion, anti corrosion

additives needed

< Water pipe leakage >


Category Product Initial Cost(USD)Initial Cost(USD)Total

Water Cooled C

hiller

Chiller Price 355,484

877,097AHU / Cooling T ower / Pump, Pr

ice148,065

Installation 383,871

VRVMulti V 874,498

1,109,660Installation 235,161

April 2008Cooling OnlyAir Duct Included

Initial CostInitial Cost Running Cost Maintenance Cost Total cost

Type of Building: Shopping Mall Total area 9,000 m2 : 6 storey Building :1,500 m2/floor Actual cooling area : 1,500 m2 * 80 % * 6 Floor = 7,200 m2 Cooling Load (Tr) / m2 : 700 Tr *12000 Btu/Hr = 1,166 Btu/m2

Equipment : Water cooled chiller /Multi V unit- Water Cooled Chiller :Trane Water cooled chiller

350 Tr x 2 set =700 Tr + 300 Back upPumps =400 Tr x 2 setAHU = 8000 CFM x 36 setCooling Tower =1200 Gpm x 3 +3 Back up

- VRF System :LG Multi V Plus II48 Hp x 19 set=912 Hp 726 Tr

Air conditioning time : Operation- 13 hour a day (09:00 ~ 22:00)- 30 days a month- average load by month

Equipments & Installation costEquipments & Installation cost

MULTI V vs Chiller7. Economic analysis


Multi V running cost is 65 % compare to chiller

Category Product

RunningCost

(USD)Tota l

Water Cooled C

hiller

Chiller Price

308,697AHU / Coolin g Tower / Pu

mp, Price

Multi V Price 200,158

Based on KW data chiller/Multi VBased on, Thailand electrical standardARI-Air conditioning & Refrigeration Institute

$0k

$100k

$200k

$300k

$400k

year 2n

d 4th 6th 8th 10th

12th

14th

Chiller

Multi V

Running costSavings up to15th yr : 35%

Chiller

Multi V

Electrical costElectrical cost


Initial Cost Running CostRunning Cost Maintenance Cost Total cost


Category PriceMaintenance

Cost(USD)Total

Water Cooled C

hiller

Chiller Price

32,177AHU / Cooling Tower / Pump,

Price

Multi V Price 11,468

$0k

$100k

$200k

$300k

$400k

year 2nd 4th 6th 8th 10th

12th

14th

Chiller

Multi V

Chiller

Multi V

MaintenanceCost savings Up to 15th yr: 66%

Maintenance breakdownChiller system -31 USD / Rt / yr.- 6 times/yrMulti V- 48 USD / Indoor / yr.- 6 times/yr

- 145 USD / Outdoor / yr.- 6 times/yr

Multi V maintenance cost is 24 % compare to chiller

Maintenance costMaintenance cost


Initial Cost Running Cost Maintenance CostMaintenance Cost Total cost


Category Chiller system VRF system Remarks

Economic Analysis

Initial cost (USD) 877,097 927,057

Running cost (USD) 308,698 200,158

Shopping mall 6F,

9,000

Maintenace cost (USD) 32,177 11,468

Total cost (USD) 1,217,972 1,138,683

BEP - 1.7 years

7. Economic analysis

Initial Cost Running Cost Maintenance Cost Total costTotal cost


LCC (Life Cycle Cost for 15 years) : Chiller 5.99 M$ > Multi V 4.27 M$ (71%)BEP (Break Even Point) : 1.7 Years

LCC (15 years) BEP

1st year 2nd year 3rd year 4th year- 20K$

+10K$

+40K$

+70K$

BEP :1.7 Years

$0k

$1000k

$2000k

$3000k

$4000k

$5000k

$6000k

$7000k

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1

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Chiller

Multi V

Cost savings : 29%

BEP :1.7 Years

8. LCC


Chiller Multi V

1,228

1,109877

32

308 200

11

1,3217%

Product &Installation

Maintenance

Electrical Fee

Chiller Multi V

5,992

23%15%

8%

77% 73%

4%

4,27435%

Product &Installation

Maintenance

Electrical Fee

Initial Cost (1st year) ( K US$ )

LCC (15 years)

8. LCC


Type of building : Shopping mallWater cooled Chiller :350 TR x 2 set=700 Tr + 300Tr (back up)VRF system:48 Hp x 19 set = 912 Hp (726TR)Commercial Building : (Shopping Mall - 9,000 Total Area) - 6 storey building:1500 per floorActual cooling area : 1,500 * 80% * 6F = 7,200Cooling load(TR) / : 700TR * 12,000Btu/h/TR 7,200 = 1167 Btu/

Capacity Price EA Sub total (THB) % Sub total (USD)350 RT 3,960,000 2 7,920,000 255,484 300 RT 3,100,000 1 3,100,000 100,000 400 RT 500,000 2 1,000,000 32,258 400 RT 500,000 1 500,000 16,129

1200 GPM 100,000 3 300,000 9,677 840 GPM 90,000 3 270,000 8,710

8,000 CFM 70,000 36 2,520,000 81,290 15,610,000 57% 503,548

9,000,000 33% 290,323 2,900,000 11% 93,548

11,900,000 43% 383,871 27,510,000 100% 887,419

48 Hp 957,000 19 18,183,000 586,548 Indoor unit ceiling duct 10 Hp 91,355 90 8,221,950 265,224

2,915 90 262,350 8,463 81,125 1 81,125 2,617

141,570 1 141,570 4,567 1,650 57 94,050 3,034 3,300 38 125,400 4,045

27,109,445 79% 874,498

Indoor unit ceiling duct

36,000 90 3,240,000 104,516 7,290,000 21% 235,161

34,399,445 100% 1,109,660

I lot

back up cooling tower (open type)

Duct working

45,000

back up chiller (screw type)

Wired remote controllerCentrol controller (ACP)

Centrol control software (AC Manager)

Sub totalTotal (Product + Installation)

Pump (Evaporator) + 1 back upAHU

Outdoor unit

Sub total

130,645

Y branchODU joint

90 4,050,000

VRF Sub total

Sub total

Outdoor unit

Total (Product + Installation)

Product

Installationduct work

piping & electrical work

Water Cooled Chiller(Screwtype)

Classification

Pipe & InsulationValve & Acc.

Power & Control

Product

Installation

Chiller (screw type)

Cooling tower (open type)

Pump (Condenser) + 1 back up

App. Cost estimation


Energy consumption

/ unit

Totalenergy

consumption(kW) (kW)271 2 542

14.9 2 29.84 Load 100% 75% 50% 25%55.2 6 331.2 Chillier 542 179 84 472.35 48 112.8 Others 474 474 474 474

1015.84 Total 1016 653 558 521Outdoor Unit 48 HP-R410a 42 19 798Indoor Unit 10 HP CCD 0.8 90 72 Load 100% 75% 50% 25%

870.0 VRF 870 609 287 165

1330

100% kW portion1% 100% 542 100% Used by Schedule 4.2.2 condition

42% 75% 179.2 33% electrical charge in Thailand45% 50% 83.9 15% THB / month USD12% 25% 47.2 9% VRF 517,076 16,680

Chiller 797,469 25,725 Gap 280,393 9,045

Operationhours kWh / day kWh / month

Operationhours kWh / day kWh / month

0.1 113.1 3,393.0 0.1 132.06 3,961.78 5.5 3,325.1 99,754.2 5.5 3,565.60 106,967.95 VRF 200,158 5.9 1,679.5 50,386.1 5.9 3,262.78 97,883.37 Chiller 308,698 1.6 257.9 7,736.0 1.6 812.82 24,384.67

13.0 5,375.6 161,269.3 13.0 7,773.3 233,197.8

VRF system

Cooling load portion IPLV100% cooling load

VRF (MULTI V system) Chiller system

75% cooling load50% cooling load25% cooling load

VRF

AHU-10 tr

Total

operating time / day (hours)operating day / month

ChillerPower consumptionLoad

operating cost 1 year

Chiller system

Category EA

Total

Power consumption under partial loadWater Cooled Chiller(Screwtype)

Chiller-350 TrCooling tower-1260 GPM

Pump-50 Hp

App. Actual running cost


Cost Unit350 RT 105,000 Baht/unit 2 210,000 400 RT 60,000 Baht/unit 2 120,000

1200 GPM 15,600 Baht/unit 6 93,600 15 RT 2,000 Baht/unit 70 140,000

2 persons 20,000 Baht/unit 12 240,000 803,600

840 Hp 3,000 Baht/unit 90 270,000 Outdoor unit 4,500 19 85,500

355,500

THB USD RemarksChiller 997,500 32,177 6 times / year

270,000 6 times / year85,500 6 times / year

355,500 11,468

Pump

TotalVRF

1500 THB / indoor unit, year4500 THB / ODU module, yea

950 THB / RT, year

Control engineer

Chiller(Screwtype)

Chiller (Screw type)Cooling tower

AHU

Total

TotalVRF

Indoor unit

A noteCategory CapacityMaintenance cost

EA Maintenancecost / year

App. Maintenance cost


ARI Released The New Standard in 2003

Available through the ARI web site:WWW.ARI.ORG

Portion by cooling load (%)Portion by cooling load (%)

IPLVIPLVOROR

APLVAPLV==

0.010.01 + + 0.420.42 + + 0.450.45 + + 0.120.12A B C DA B C D

11

kW / kW (ARI Part load weighting factors)

1% 1% 42% 45% 42% 45% 12%12%

100% 75% 50% 25%100% 75% 50% 25%

WEIGHTED (%)WEIGHTED (%)

ARI550/590ARI550/590--20032003

Cooling LoadCooling Load

App. Energy efficiency (IPLV)

Slide Number 1Slide Number 2Slide Number 3Slide Number 4Slide Number 5Slide Number 6Slide Number 7Slide Number 8Slide Number 9Slide Number 10Slide Number 11Slide Number 12Slide Number 13Slide Number 14Slide Number 15Slide Number 16Slide Number 17Slide Number 18Slide Number 19Slide Number 20Slide Number 21Slide Number 22Slide Number 23Slide Number 24Slide Number 25ARI Released The New Standard in 2003

2.2.e. Chiller vs Vrf_multi v III

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