Chiller-vs-vrf.ppt

1/14 Copyright ⓒ 2008 All rights reserved LG Electronics Inc.
Chiller vs VRF system
LG Electronics Inc.
LGEHQ CAC Team

1. Design Comparison
VRF is very simplified refrigerant piping system. More flexible than water piping.
Chiller
MULTI V Plus Ⅱ (VRF)
Chiller system
• Outdoor unit (air-cooled type)
• Indoor unit
• Refrigerant piping
• Chiller
• FCU (Fan Coil Unit)
• AHU (Air Handling Unit)
System
composition
Feature
• Cooling tower
• Water piping, Duct working
• Water pumps
System concept
Design Commissioning
Operation Maintenance
Installation Reliability

Network
Feature Chiller system
• Complicated wiring
• Simple wiring
Easy network wiring
1. Design Comparison Network design
ACP

1. Design Comparison Total management
[Manufacturer]
VAV boxes
supplier
Control
system
Feature Chiller system MULTI V Plus Ⅱ (VRF)
(For VRF) Manufacturer provide all equipment
• Simple control structure
No 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.

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)
Capacity
control
Feature
After office hours operation, VRF could be operated for the user demands.
<Better Capacity operation>
Operating Area
< Limited operation>
Individual operation
2. Operation Comparison

Temperature
control
Require
1℃ or 2℃
Very precise
± 0.5℃
Precise temperature control
30
25
20
15
10 20 30 40 50 60 70
Cooling
MIN.
Chiller system
MULTI V system
Room
temp.
 0.5 0 C from set point
Temp. control
2. Operation Comparison

VRF system doesn’t need a duct space.
Space
Efficiency
Feature MULTI V Plus Ⅱ (VRF)
• Small refrigerant space
Chiller system
• Large duct space
Space (Duct working)
3. Installation Comparison

Chiller
Pump
Boiler
Cooling
tower
(On the rooftop)
(Machine room drawing)
Outdoor
Unit
(On the rooftop)
(Rooftop drawing)
VRF system is no need for a machine room.
Installation
space
Feature MULTI V Plus Ⅱ (VRF)
• No need a machine room
Chiller system
• Need a machine room
Installation space

Efficient use of space is possible for VRF system
Chiller system
Space
Efficiency
Feature
P P
1/3
CHILLER SYSTEM
• Large pipe shaft is needed for water piping
VRF System
• Small pipe shaft is needed
Space (Pipe shaft)

VRF system expansion is very easy with extra outdoor & indoor unit.
Chiller system
System
Expansion
Feature
• Capacity addition is difficult
as additional mechanical room, pump, cooling tower,
panel and piping is required.
• System Expansion is Easy
+
System expansion

1 step Commissioning
6 steps Commissioning
Chiller system
Commissioning
Feature
There are a lot of commissioning points for the chiller system
• 6 Steps Commissioning • 1 Step Commissioning
Water cooled chiller (3)
(4)
NO. of commissioning point
4. Commissioning Comparison

Maintenance
Feature
Maintenance costs for a Multi V is lower than chilled water systems.
Water cooled chiller (3)
(4)
• 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
Maintenance list
5. Maintenance Comparison

(For Chiller Water treatment is required for clean water)
<Polluted Cooling Tower>
Water
treatment
• Water treatment is required
(deficient service can cause legionary disease in the system)
• No water treatment is needed
Water treatment

Scale
cleaning
< The system is consist of refrigerant pipes >
• No water pipes : No scale (use refrigerant)
• Need to clean the water pipes
System efficiency drop & origin of germs
After 2~3year After 5~6year After 7~8year
10% 25~30% 35~40%
thickness of scale
Energy
Loss
Unit : mm
Unit : %
(For Chiller) Maintenance & cleaning periodically by exclusive company
Scale cleaning

Maintenance Staff
Maintenance
Staff
(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.
<NO Maintenance Staff>
< Maintenance Staff>

Pipe Erosion
6. Reliability Comparison
Pipe
Erosion
(For Chiller) Certified maintenance staff is needed
• Refrigerant does not cause corrosion therefore
no pipe damage occurred
• Pipe erosion can cause leakage.
• System capacity reduction.
• Brines use increase corrosion, anti corrosion
additives needed
<Cooper Pipe>
< Water pipe leakage >

Category Product
Initial Cost
(USD)
Initial Cost
(USD)Total
Water
Cooled C
hiller
Chiller Price 355,484
877,097
AHU / Cooling T
ower / Pump, Pr
ice
148,065
Installation 383,871
VRV
Multi V 874,498
1,109,660
Installation 235,161
•April 2008
•Cooling Only
•Air Duct Included
Initial 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 up
Pump’s =400 Tr x 2 set
AHU = 8000 CFM x 36 set
Cooling Tower =1200 Gpm x 3 +3 Back up
- VRF System :LG Multi V Plus II
48 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 cost
MULTI V vs Chiller
7. Economic analysis

Multi V running cost is 65 % compare to chiller
Category Product
Running
Cost
(USD)Tota
l
Water
Cooled C
hiller
Chiller Price
308,697
AHU / Coolin
g Tower / Pu
mp, Price
Multi V Price 200,158
•Based on KW data chiller/Multi V
•Based on, Thailand electrical standard
•ARI-Air conditioning & Refrigeration Institute
$0k
$100k
$200k
$300k
$400k
y
e
a
r
2
n
d
4
t
h
6
t
h
8
t
h
1
0
t
h
1
2
t
h
1
4
t
h
Chiller
Multi V
Running cost
Savings up to
15th yr : 35%
Chiller
Multi V
 Electrical cost
MULTI V vs Chiller

Category Price
Maintenance
Cost
(USD)Total
Water
Cooled C
hiller
Chiller Price
32,177
AHU / Cooling
Tower / Pump,
Price
Multi V Price 11,468
$0k
$100k
$200k
$300k
$400k
y
e
a
r
2
n
d
4
t
h
6
t
h
8
t
h
1
0
t
h
1
2
t
h
1
4
t
h
Chiller
Multi V
Chiller
Multi V
Maintenance
Cost savings
Up to 15th yr
: 66%
•Maintenance breakdown
•Chiller system -31 USD / Rt / yr.- 6 times/yr
•Multi 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 cost
MULTI V vs Chiller

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

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
year
1st
2nd
3rd
4th
5th
6th
7th
8th
9th
10th
11th
12th
13th
14th
15th
Chiller
Multi V
Cost savings
: 29%
BEP :
1.7 Years
8. LCC

Chiller Multi V
1,228
1,109
877
32
308 200
11
1,321
7%
Product &
Installation
Maintenance
Electrical Fee
Chiller Multi V
5,992
23%
15%
8%
77% 73%
4%
4,274
35%
Product &
Installation
Maintenance
Electrical Fee
Initial Cost (1st year)
( K US$ )
LCC (15 years)
8. LCC

Type of building : Shopping mall
Water 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 floor
Actual cooling area : 1,500㎡ * 80% * 6F = 7,200㎡
Cooling 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 controller
Centrol controller (ACP)
Centrol control software (AC Manager)
Sub total
Total (Product + Installation)
Pump (Evaporator) + 1 back up
AHU
Outdoor unit
Sub total
130,645
Y branch
ODU joint
90 4,050,000
VRF Sub total
Sub total
Outdoor unit
Total (Product + Installation)
Product
Installation
duct work
piping & electrical work
Water Cooled
Chiller
(Screw
type)
Classification
Pipe & Insulation
Valve & Acc.
Power & Control
Product
Installation
Chiller (screw type)
Cooling tower (open type)
Pump (Condenser) + 1 back up
App. Cost estimation

Energy
consumption
/ unit
Total
energy
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 47
2.35 48 112.8 Others 474 474 474 474
1015.84 Total 1016 653 558 521
Outdoor Unit 48 HP-R410a 42 19 798
Indoor Unit 10 HP CCD 0.8 90 72 Load 100% 75% 50% 25%
870.0 VRF 870 609 287 165
13
30
100% kW portion
1% 100% 542 100% Used by Schedule 4.2.2 condition
42% 75% 179.2 33% electrical charge in Thailand
45% 50% 83.9 15% THB / month USD
12% 25% 47.2 9% VRF 517,076 16,680
Chiller 797,469 25,725
Gap 280,393 9,045
Operation
hours
kWh / day kWh / month
Operation
hours
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 IPLV
100% cooling load
VRF (MULTI V system) Chiller system
75% cooling load
50% cooling load
25% cooling load
VRF
AHU-10 tr
Total
operating time / day (hours)
operating day / month
Chiller
Power consumption
Load
operating cost 1
year
■ Chiller system
Category EA
Total
Power consumption under partial load
Water
Cooled
Chiller
(Screw
type)
Chiller-350 Tr
Cooling tower-1260 GPM
Pump-50 Hp
App. Actual running cost

Cost Unit
350 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 Remarks
Chiller 997,500 32,177 6 times / year
270,000 6 times / year
85,500 6 times / year
355,500 11,468
Pump
Total
VRF
1500 THB / indoor unit, year
4500 THB / ODU module, year
950 THB / RT, year
Control engineer
Chiller
(Screw
type)
Chiller (Screw type)
Cooling tower
AHU
Total
Total
VRF
Indoor unit
A note
Category Capacity
Maintenance cost
EA
Maintenance
cost / year
App. Maintenance cost

ARI Released The New Standard in 2003
Available through
the ARI web site:
WWW.ARI.ORG
Portion by cooling load (%)
IPLV
OR
APLV
=
0.01 + 0.42 + 0.45 + 0.12
A B C D
1
kW / kW (ARI Part load weighting factors)
1% 42% 45% 12%
100% 75% 50% 25%
WEIGHTED (%)
ARI550/590-2003
Cooling Load
App. Energy efficiency (IPLV)

Chiller-vs-vrf.ppt

Recommended

Recommended

More Related Content

What's hot

What's hot (20)

Similar to Chiller-vs-vrf.ppt

Similar to Chiller-vs-vrf.ppt (20)

Recently uploaded

Recently uploaded (20)

Chiller-vs-vrf.ppt