Feb. 3rd 2015 Panasonic Corporation

Refrigeration and Air-Conditioning Devices Business Division Hidekazu Tachibana

Introduction of Panasonic New CO2 refrigeration system （Technical　Part）

Number  of  stores  installing  Panasonic  CO2  refrigera6on  system  in  Japan  and  future  prospect

   Solu6ons

   Energy  saving  confirma6on  results  

   Issues  of  CO2  units  and  our  Future  Ac6on

AGENDA #1

584

1,000

1,200

1,450

1,700

0

250

500

750

1,000

1,250

1,500

1,750

FY2010 FY2011 FY2012 FY2013 FY2014 estimation

FY2015 target

FY2016 target

FY2017 target

FY2018 target

Number of stores installing Panasonic CO2 refrigeration system in Japan and future prospect

GWP 1,800

「GWP 1,500」 Target year 2025 early clear！ ※1

GWP 2,000

GWP 2,200

GWP 2,400

Stores

Supermarket

Convenience store

#2

※1　Numerical value of a GWP （1,500） and accomplishment year （2025） 　　　 target established in a law by the Japanese Government

Solutions

• Development  of  Compressor

• Development  of  Split  system

• Development  of  Pressure  adjust  control

Solu6ons

#3

New  technology  

Intercooler

Casing Motor

1st-stage

2nd-stage

Discharge Suction

High Pressure

Intermediate Pressure

Solutions -Development of Compressor-

Low Pressure

Air Flow

Structure of 2-stages compression CO2 rotary compressor

#4

Solutions -Development of Compressor- #5 Issues and solutions of CO2 compressor

Refrigerant leakage reduction

Compression efficiency improvement

Casing design pressure is Intermediate pressure

Weight saving of the Casing Cost reduction

Distribution of compression torque

Load reduction to the sliding parts

Reliability improvement Vibration and Noise reduction

Discharge gas is cooled by the intercooler

Temperature of the sliding parts and the oil is reduced

Pressure difference reduction at 2-stages

Reliability and Efficiency improvement

Weight and Cost

Efficiency

Reliability Vibration and Noise

Reliability Efficiency

Solutions -Development of Split system

Air Flow

Air Flow

Gas Cooｌer

Intercooler

Evaporator Expansion Device

1st stage Compression

2nd stage Compression

Main Circuit

#6 　　　　Refrigeration circuit of 2-stage compression

Solutions -Development of Split system

Air Flow Expansion Device

Air Flow

Gas CooIer

Intercooler

Evaporator Expansion Device

1st stage Compression

2nd stage Compression

Split Heat Exchanger

Main Circuit Split branch Circuit

#7 　　　　Refrigeration circuit of Split System

Solutions -Development of Split system

1MPa(-40deg)

8.4MPa 34deg

18deg

#8 　　　　Ph diagram of 2-stage compression

Solutions -Development of Split system

　　　　Ph diagram of Split System

34deg

18deg

3.4MPa(-1deg)

Heat Exchange

2deg

156%

#9

Solutions

• Development  of  Compressor

• Development  of  Split  system

• Development  of  Pressure  adjust  control

Solu6ons

#10

New  technology  

Outdoor Unit

Split Heat Exchanger

Show case

Ｓ

Refrigerant Amount Adjustment Tank

Low Pressure

High Pressure

Pressure 5MPa～9MPa

Ｓ

Solutions -Development of Pressure adjust control #11

Compressor Gas cooler

Pressure Fluctuates

with the season

Pre

ssur

e

Enthalpy

Spring Summer Autumn Winter

　　　Annual operating pressure behavior of Present model

Intercooler

Reduced Pressure by Intercooler

Gas cooler Compressor

Split Heat Exchanger

Low Pressure

High Pressure

Pressure 5.5MPa～6MPa

Show case

Pressure Is constant

in all season

Pre

ssur

e

Enthalpy

Spring Summer Autumn Winter

#12 Solutions -Development of Pressure adjust control 　　　Annual operating pressure behavior of Pressure adjust control type

Outdoor Unit

・Pressure to showcase fluctuate 5MPa～9MPa with the season.

・Airtight examination pressure of the construction plumbing　12MPa.

・Pressure to showcase is controlled constant about 6MPa in all season.

・The necessary refrigerant quantity in a refrigerating cycle is stable in all season.

・Airtight examination pressure of the construction plumbing　8MPa.

5MPa 　～9MPa

Winter Autumn Summer Spring

#13

Winter Autumn Summer Spring

Solutions -Development of Pressure adjust control Comparison of the annual operating pressure behavior

Present model

Pressure adjust control type 【New model】

(1) Decrease plumbing weight ・Decrease weight and cost of the output pressure plumbing in comparison with Present model. ・By High-strength Copper pipe adoption, Furthermore, decreased plumbing weight and improved 　installation. (The welding work in the short time and bending of the plumbing is possible.)

#14

Ex. 8 refrigeration systems and 3 frozen systems by 20HP

Present model Airtight examination pressure：12MPa

Transfer Pressure plumbing Section

OD19.05　(t2.4) Transfer Pressure plumbing Section

OD19.05　(t1.6) Transfer Pressure plumbing Section

OD15.88　(t1.1)

(2) Simplification of adjustment for appropriate refrigerant quantity ・Complicated adjustment for appropriate refrigerant quantity becomes needless at Operation check. ・The additional setting of Refrigerant Adjustment Tank becomes needless.

Copper High-

Strength Copper

Copper

Transfer Pressure control type Airtight examination pressure：8MPa

Cost decrease

18％

Weight decrease

59％

Weight decrease

31％

Solutions -Development of Pressure adjust control Improvement for installation by the adoption of Pressure adjust control type

2Fans→１Fan decrease of

running sound

Compact design by the change of the main body size. More compact at light weight than R404a model.　※1

Size 　3.09 m3

Weight 　594 kg

Size 　2.05 m3

Weight 　480 kg

※1　It is a about 20HP. （R404a　model： 530kg）

1,938mm

1,190mm 890mm

２０馬力 ２０馬力

①　20HP／15HP

1,790mm 890mm 1,938m

m

Present model

#15

　Pressure adjust control type New model

Weight decrease

20%

Size decrease

34%

Solutions -Development of Pressure adjust control Small sizing＆light weighting

890mm 890mm

1,938mm

1,260mm

Compact design by the structure change to side flow. The weight is the same as R404a model.　※1

1,350mm 586mm

Size 　1.53 m3

Weight 　330 kg

Size 　0.99 m3

Weight 　255 kg

#16

Present model

Pressure adjust control type New model

Weight decrease

23%

Size decrease

35%

※1　R404a 　model ：255kg

②　　　10HP

Solutions -Development of Pressure adjust control Small sizing＆light weighting

Low-temp.

Mid-temp

June,2015 Release

#17

Pressure adjust control type

New model

High Pressure type

Low-temp.

Mid-temp

Low-temp.

Low-temp.

Mid-temp

Sep.,2015 Release

May,2015 Release

Mid-temp

Present model

Low-temp.

Mid-temp

New model

Low-temp.

Mid-temp

New model

New model

Present model

Present model

１５／２０HP

１０HP

２HP

１５／２０HP

１０HP １０HP

２HP

Solutions -Development of Pressure adjust control Series lineup of Pressure adjust control type

Energy saving confirmation results （by Present model）

• Carried  out  at  6  stores

• Efficiency  and  annual  CO2  emission  was  

compared  to  the  conven6onal  

refrigera6on  unit  (R404a  Inverter)

Actual  installed  example

#18

Confirmation results -At refrigerator temperature-

* 12.9%-18.2%, 6 stores on Average

#19

The actual installed example in the Kyushu region

Confirmation results -At freezer temperature-

* 17.4%-32.2%, 6 stores on Average

#20

The actual installed example in the Kansai region

Confirmation results -Annual CO2 emission-

Freezer  Temperature

63%  

Refrigerator  Temperature  

56%

0 50

100 150 200 250 300 350 400

Freezer temperature

Refrigerator temperature Total

Direct influence Indirect influence

Comparison of R404a and CO2 Refrigeration Unit

CO2

CO2 CO2

R404a

R404a

R404a

Ann

ual C

O2 e

mis

sion

Direct influence of CO2 refrigerant ‘almost zero’

Annual  CO2  emission  

about60%  reduc6on

#21

Issues of CO2 units and our Future Action

1. Further Cost Reduction

à Reduction of installation cost by the adoption of Pressure adjust control type. 　　　 ・Supply chain maintenance of High-strength Copper pipe and connection parts. ・Standardization of various parts in condensing unit.

3. Training of Installers

à Trainings for CO2 system installation is key issue. 　　　(Installation, Operation check, and Service Maintenance) Service Manual was prepared and Training courses shall be carried

accordingly.　

#22

2. Product Improvement

à Efficiency, Noise, and Vibration can be further improved. ・Product Line-up need to be improved. ・Outdoor units to be developed 25HP／30HP （reduction of systems per store） 　　 　　and Indoor units to be diversified.

Thank you very much!

.