1. High Efficiency Room Air-conditioners
while phasing down HFCs
Jonathan Li, Midea Group,China
July 2018 v

2. Opportunities to reduce energy consumption in room air conditioners
Use of variable speed compressors/motors
Use of latest evaporator and condenser technologies
Use of the best optimization of structural design with excellent air flow
Use of best optimization of the electronic control logic
Use of appropriate refrigerant

3. HFC consumption phase down for A5 and non A5 countries

4. Candidates for preventing global warming
Properties of Alternative Refrigerants
R22
Single
R410A
Mix
R32
HFC
Propane (R290)
Natural
CO2(R744 )
HFO1234yf
Refrigerant physical properties
Cond.
Press.
MPa
Capacity
R22 ratio
COP
ODP
GWP
Life
Year
Flamm-
ability
Toxicity
1.73
100
0.05
1810
11.9 No
Low
2.72
141 92
2088 -
160 97
675 5
1.53 83 98
＜20
High
10.00
243 41 1
120
1.16 57 90 4 ?
7day
2.80
HCFC
Red areas show unsuitable properties as an alternative refrigerant.
Candidates for preventing global warming

5. Energy efficiency Efficiency ratio HFO1234yf R32 R290 CO2 R410A
Energy efficiency comparison
　(R410A ratio)
HFO1234yf
R32
R290
CO2
R410A
CO2 and HFO 1234yf have bad efficiency, R290 and R32 have efficiency equivalent to R410A.
Efficiency ratio

6. Comparison of the weights of compressors
Refrigerant
charge / g
Weight of R290
compressor (KG)
Weight of R410A
compressor (KG)
Weight difference
(new - old)
Portable AC
Portable 5K 90
9.1
7.5
1.6
Portable 8K
150
10.6
8.8
1.8
Portable 9K
170
10.6
8.8
1.8
Portable12K
230
12.1
11.5
0.6
9K high wall
285
10.6
8.8
1.8
12K high wall
380
12.1
11.5
0.6

7. 2.Endorsement for Midea Products with Refrigerant R290
(Supported by the United Nations and Chinese Government and
Certified by the German Ecolabel Blue Angel)

8. It is the first in the air conditioning industry
certified by the German ecolabel Blue Angel
Midea split-type AE series R290 full DC inverter AC is the first of its kind to be awarded the
German ecolabel Blue Angel for its ultra-low GWP refrigerant, high energy efficiency, low noise, and
stringent material safety control. Guided by the German Federal Ministry for the Environment, the
Blue Angel certification is the highest standard of comprehensive energy efficiency, health and
environmental characteristics in the field of household electric appliances.

9. 3. Demonstration Projects

10. Jiaxing Nanyang Polytechnic Institute in Zhejiang Province, China
Qty: 1,096 sets
Installation time: 2016

11. University of Seychelles
Qty: 18 sets
Installation time: 2017

12. Sample project in Ghana
Region: Ghana Qty: 410 units
By virtue of its excellent products and ultra-high energy efficiency, Midea
won the joint bid of Ghana's Ministry of Environmental Protection
and the federally owned Deutsche Gesellschaft für Internationale
Zusammenarbeit (GIZ) GmbH, becoming the first company authorized
to export and sell products with R290 in the market in Ghana.