1. Toshiba S-MMS vs LG MULTI V Plus II
I’m going to explain the difference between Inverter system and Digital scroll system.
The main subject is the compressor.
LG Electronics Inc.
LGEHQ CAC Team

2. 1. Compressor comparison
Inverter Scroll compressor is the best solution for a commercial building.
Reciprocating
Compressor
Rotary
Scroll
Strong point
Low cost
Middle cost,
Compressing part is simple
Liquid handling capacity
Low vibration & noise,
high capacity
Weak point
High Vibration,
noise
Less liquid handling capacity
Low reliability (spring loaded vane)
High cost
Normal
Capacity
Low capacity
(~1HP)
Middle capacity
(1~5HP)
High capacity
(3~10HP)
use
Refrigerator, WRAC
PAC, RAC etc.
Multi, Commercial A/C

3. Total power consumption (kW/h)
2. Power consumption comparison
■ Design condition of HCL COMNET SYSTEMS & SERVICES LTD
- Total capacity of system : 560Hp (48Hp * 11EA / 32Hp * 1EA)
48HP
32HP
Total power consumption (kW/h)
Power consumption (kW/h)
Nos. of ODUs
Sub total (kW/h)
Nos. of ODUs
S-MMS
49.67 11
546.37
28.65 1
575.02
MULTI V Plus II 42
462 28
490
■ Operation condition of A/C units
- 24hours / day, 30days / month, 12month / year
- Electrical charge : 6Rs / kWh
1month
1year
Basic power consumption (kW/h)
Total power consumption (kWh)
Electrical charge (Rs)
S-MMS
575.02
2,484,086
29,809,037
MULTI V Plus II
490
2,116,800
25,401,600
Gap
85.02
367,286
4,407,437

4. <Cooling Capacity> <Power consumption>
3. Performance comparison under the hot temp.
Inverter Scroll compressor has high performance under the condition of hot temp.
Outdoor unit 100%
Cooling Capacity (kW)
Power consumption (kW)
Outdoor temp(35℃)
Outdoor temp(40℃)
S-MMS
135
125.60
49.67
52.55
MULTI V
130.37
42.00
45.38
135
52.55
130.37
49.67
125.60
45.38
42.00
<Cooling Capacity>
<Power consumption>

5. Convenient for handling large capacity
4. Compressor comparison (Efficiency)
Rotary compressor is weak for liquid compressing and has 92% cooling and heating efficiency compared to scroll compressor.
Toshiba S-MMS
MULTI V PLUS II
Capacity (kW) 25
24.0
MULTI V PLUS II
Type
Rotary type
Scroll type 20
19.4
16.3 15
※Based on 1 inverter comp.
Structure
13.1
Frequency (Hz) 60 90
120
※Reference from each companies’ compressor catalogue
MULTI V PLUS II
Less Liquid handling
Convenient for handling large capacity
Feature
Volumetric
Efficiency
92%
100%
(Base)
Origin of
Development
Toshiba (Japan)
LG (Korea)
[Efficiency comparison for compressor type (reference from air-conditioning technology thesis)]

6. 5. Design limit comparison
LG MULTI V PLUS II is excellent for maximum pipe length
S-MMS
MULTI V PLUS II
Maximum pipe length
150m
200m
Maximum relative pipe length
175m
225m
Total expansion pipe length
300m
1000m
Height difference (Upper outdoor unit)
50m
100m
Height difference (lower outdoor unit)
40m
Maximum length after first branch
65m
90m
■ LG MULTI V PLUS II system has a plate type sub-cooling HEX
Increased sub-cooling by plate-type heat exchanger
Enable to be long piping length and level difference
More powerful Cooling operation
Plate type SC

7. Finally we hope all our software will be help you to convenient and successful in the LG CAC Business, Thank you.

8. Appendix. Design limit of Toshiba S-MMS

9. Appendix. Design limit of MULTI V PLUS II
Outdoor units
MULTI V Plus II
110m ON ON ON
Indoor units
<DA Research Lab in Korea>
103m

10. Appendix. Power consumption of Toshiba S-MMS

11. Appendix. Power consumption of Toshiba S-MMS
■ Power consumption of Toshiba S-MMS 48HP : 49.67kW/h
※ Source - Toshiba Engineering data book

12. Appendix. Power consumption of Toshiba S-MMS
■ Power consumption of Toshiba S-MMS 32HP : 28.65kW/h
※ Source - Toshiba Engineering data book

13. Appendix. Power consumption of MULTI V PLUS II
■ Power consumption of MULTI V PLUS II 48HP : 42kW/h

14. Appendix. Power consumption of MULTI V PLUS II
■ Power consumption of MULTI V PLUS II 32HP : 28kW/h

15. Appendix. Compressor capacity of Toshiba
■ No of compressors – Toshiba S-MMS 48HP : 8 Compressors (4.2kW*2)*4
※ Source - Toshiba Engineering data book

16. Appendix. Compressor capacity of LG MULTI V PLUS II
■ No of compressors - MULTI V PLUS II 48HP : 6 Compressors (5.356kW+5.3kW)*3

17. Appendix. Delhi temperature

18. Appendix. Load performance of Toshiba S-MMS
※ Source - Toshiba Engineering data book

19. Appendix. Load performance of Toshiba S-MMS
※ Source – LG MULTI V PLUS II Engineering data book

20. Appendix. Certificate for Energy conservation product