Chiller Vs VRF PDF
Chiller Vs VRF PDF
Chiller Vs VRF PDF
LG Electronics Inc.
LGEHQ CAC Team
1/14 Copyright ⓒ 2008 All rights reserved LG Electronics Inc.
1. Design Comparison System concept
VRF is very simplified refrigerant piping system. More flexible than water piping.
Chiller
ACP
VAV boxes
supplier
[Manufacturer]
After office hours operation, VRF could be operated for the user demands.
• The systems commonly condition the entire building • The systems condition only the
Capacity
at predetermined times, with no regard to user demands. necessary rooms with regard
control
(very hot midnight, weekend, holiday etc) to user demands.
Operating Area
Cooling
MULTI V system
Chiller system
30
0.5 0 C from set point
Room temp.
25
20
15
10 20 30 40 50 60 70 MIN.
Space
• Large duct space • Small refrigerant space
Efficiency
Installation
• Need a machine room • No need a machine room
space
Pump
(Machine room drawing)
Boiler
Cooling Outdoor
tower Unit
Space
• Large pipe shaft is needed for water piping • Small pipe shaft is needed
Efficiency
1/3
P P
VRF system expansion is very easy with extra outdoor & indoor unit.
(4)
• Filter cleaning
• Pump • Filter cleaning
• Duct cleaning
Maintenance • Water treatment • Heat exchanger cleaning
• Water pipe – maintenance
• Periodical oil change, overhaul • Cooling tower cleaning • Cycle check by notebook (LG MV)
(4)
Unit : %
Unit : mm
thickness of scale
After 2~3year After 5~6year After 7~8year < The system is consist of refrigerant pipes >
10% 25~30% 35~40%
14/14 Copyright ⓒ 2008 All rights reserved LG Electronics Inc.
5. Maintenance Comparison Maintenance Staff
• Equipment : Water cooled chiller /Multi V unit Initial Cost Initial Cost
- Water Cooled Chiller :Trane Water cooled chiller Category Product
(USD) (USD)Total
350 Tr x 2 set =700 Tr + 300 Back up
Pump’s =400 Tr x 2 set
Chiller Price 355,484
AHU = 8000 CFM x 36 set
Cooling Tower =1200 Gpm x 3 +3 Back up Water AHU / Cooling T
- VRF System :LG Multi V Plus II Cooled C ower / Pump, Pr 148,065 877,097
48 Hp x 19 set=912 Hp 726 Tr hiller ice
Installation 383,871
• Air conditioning time : Operation
- 13 hour a day (09:00 ~ 22:00) Multi V 874,498
VRV 1,109,660
- 30 days a month Installation 235,161
- average load by month
Electrical cost
Running $400k
Chiller
Category Product Cost Chiller
(USD)Tota $300k Multi V
l Multi V
Chiller Price $200k
th
th
th
d
h
ar
2n
4t
6t
8t
10
12
14
ye
Maintenance cost
Maintenance
$400k Chiller
Chiller
Category Price Cost Multi V
$300k
(USD)Total Multi V
Water Maintenance
Cooled C AHU / Cooling 32,177 $100k Cost savings
hiller Tower / Pump, Up to 15th yr
Price : 66%
$0k
th
th
th
d
h
Multi V Price 11,468 ar
2n
4t
6t
8t
10
12
14
ye
•Maintenance breakdown
•Chiller system -31 USD / Rt / yr.- 6 times/yr
•Multi V- 48 USD / Indoor / yr.- 6 times/yr
- 145 USD / Outdoor / yr.- 6 times/yr
LCC (Life Cycle Cost for 15 years) : Chiller 5.99 M$ > Multi V 4.27 M$ (71%)
BEP (Break Even Point) : 1.7 Years
$4000k BEP :
1.7 Years
$3000k
+10K$
$2000k
$1000k
$0k BEP :
2nd
3rd
4th
5th
6th
7th
8th
9th
10th
11th
12th
13th
14th
15th
1st
year
1.7 Years
- 20K$
1st year 2nd year 3rd year 4th year
1,228 5,992
7% 1,321 35% 4,274
11 77% 73%
Maintenance 32
1,109
Product & Maintenance 4%
877 8%
Installation
Product & 23%
15%
Installation
Energy Total
consumption energy
Category EA
/ unit consumption
(kW) (kW) ■ Chiller system
Chiller-350 Tr 271 2 542 Power consumption under partial load
Water
Cooled Cooling tower-1260 GPM 14.9 2 29.84 Load 100% 75% 50% 25%
Chiller Pump-50 Hp 55.2 6 331.2 Chillier 542 179 84 47
(Screw AHU-10 tr 2.35 48 112.8 Others 474 474 474 474
type)
Total 1015.84 Total 1016 653 558 521
Outdoor Unit 48 HP-R410a 42 19 798 ■ VRF system
VRF Indoor Unit 10 HP CCD 0.8 90 72 Load 100% 75% 50% 25%
Total 870.0 VRF 870 609 287 165
1
IPLV
OR =
APLV 0.01 + 0.42 + 0.45 + 0.12
A B C D
ARI550/590-2003