LATEST INNOVATIONS ON ENERGY EFFICIENT GLASS … · A SPECIFIC DEVELOPMENT FOR COMMERCIAL...

LATEST INNOVATIONSON ENERGY EFFICIENT GLASS PRODUCTS

FOR REFRIGERATED DISPLAY CABINETS

PASCAL CHARTIER

EUROSHOP 2020ENERGY MANAGEMENT STAGE

FEBRUARY 20, 2020

2 PROPERTY OF SAINT-GOBAIN BUILDING GLASS

ENERGY EFFICIENCY & CO2 IMPACT

VISION

- CONDENSATION RESISTANCE

- ANTIREFLECTIVE GLASS

- FRAMELESS GLASS DOOR

LATEST INNOVATIONS ON GLASS FOR

COMMERCIAL REFRIGERATION

Medium temperature vertical cabinets

Low temperature cabinets

Low temperature cabinets

Multi-deck chiller cabinets Beverage coolers Vending machines Wine appliances

Combined

cabinets Multi-deck freezer cabinets Plug-in vertical freezers

Island freezers

Ice cream cabinets

3 PROPERTY OF SAINT-GOBAIN

Medium temperature vertical cabinets

Low temperature cabinets / vertical

Low temperature cabinets / horizontal

Multi-deck chiller cabinets Beverage coolers Vending machines Wine appliances

Combined

cabinets Multi-deck freezer cabinets Plug-in vertical freezers

Island freezers

Ice cream cabinets

Low-E double glass unit

Low-E triple glass unitHeated glass door

Single low-e glass (cover lids)Double or triple glass unit – heated glass (lateral sides)


Radiation

Conduction

Convection

Needs matter :

gas, liquid or solid


HOW TO REDUCE THE THERMAL TRANSFER THROUGH THE GLASS?

Radiation Convection Conduction

Air filled cavity ++ +

Insulating gas filled cavity ++ ++

Low-E glass gen 1

(E > 0.10)++

Low-E glass gen 2

(E << 0.10)+++

1 sealed cavity or chamber = double glass unit

2 sealed cavities or chambers = triple glass unit


KEY PERFORMANCE INDICATOR = U-VALUE

U-value = Thermal heat transfer coefficientAmount of heat transferred through the glass pane due to thedifference of temperature between inside and outside

The lower the U-value, the better the thermal insulation

Unit

Metric : W/m².°K

Imperial : btu/ft².hr.°F

Norms:

EN 673 (building)

ASHRAE


Ug

valu

e W

/ m

² K

0

2

4

6

INFLUENCE OF THE GLAZING DESIGN ON THE U-VALUE

Convection

Conduction

Radiation

Bad

Bad

Bad

Good

Medium

Bad

Good

Medium

Medium

Good

Medium

Good

Good

Good

Good

3.71.8 ↓ 1.5 1.1 ↓ 1.0 0.8 ↓ 0.5

MONOLITHIC

glassMONOLITHIC

low E glass

(gen 1)

DGU with

low E glass

(gen1)

DGU with

low E glass

(PLANITHERM)

TRIPLE GU with

2 low E glasses

(PLANITHERM)

5.8

The best DGU

for medium T cabinetsTGU

for low T

cabinets

0.6 ↓ 0.4

Vacuum

glass

Excellent

Good

Good


High transmission of the visible light VISION

Visible

light

Heat

(far IR)

Ambient Cold Ambient Cold

Visible

light

Heat

(far IR)

Low-E

CoatingPLANITHERM

High far IR (heat) reflectance = Low-E INSULATION

Visible

0.3 0.8 1.5 2.0 2.5 10 20 30 405 50

Lo

w E

Tra

nsm

itta

nce

%

Lo

w E

Re

fle

cta

nce

%

100

80

20

0

Wavelength in µm

eN = Abs = 100 – T - RSolar range

Far IR

DGU

without low-EDGU

with low-E glass


Glass substrate on which a thin film

generally composed of different layers

is deposited at the surface, to change

LUMINOUS, ENERGETIC, … properties


Offline process

= magnetrontechnology

Online process

= pyrolytic technology

« coater »On the float line

Low-E Gen 1 Low-E Gen 2


Coating applied offline under vacuum by a magnetron sputtering process

This process only can produce GEN 2 high performance low-E like PLANITHERM


For reflection (mirrors)

For thermal insulation

For solar control

For antireflection

For self-cleaning

For photovoltaics

…

Coating

(200 nm)

Glass


The last generation of high performance low-E glass :

• Reduces energy consumption of cabinets

• Improves condensation resistance of the door

• Allows an outstanding view through the glass: high clarity, neutral color, no haze

• Provides safety after thermal tempering


INFLUENCE OF GLAZING COMPOSITION ON THE SURFACE TEMPERATURE

DGU with low-E

(PLANITHERM)

20 °C

15 °C

10 °C

5 °C

0 °CDGU

without

low-E

Single

glazing

TGU with x2 low-E

(¨PLANITHERM)

COLD

SIDE

(0°C)

AMBIENT

(store)

SIDE

(20°C)


Example: VERTICAL CABINET1m² glass door area

Inside cabinet temperature 2°C

Store ambient temperature 20°C

Heat transfer (energy) lost through the glass of the door:

Monolithic low-E glass : 583 kWh/yr

Gen 1 low-E double glass unit : 283 kWh/yr (-51%)

Gen 2* low-E double glass unit : 158 kWh/yr (-73%) 241 kg/yr CO2 saved

A STRONG INFLUENCE ON THE ENERGY EFFICIENCY OF THE COLD CABINET DOORS

* PLANITHERM XN II


Example: HORIZONTAL CABINET1m² glass area

Inside cabinet temperature -22°C

Store ambient temperature +20°C

Heat transfer (energy) lost through the glass of the lid:

Gen 1 low-E monolithic glass : 428 kWh/yr

Gen 1b low-E monolithic glass : 369 kWh/yr

Gen 2* low-E monolithic glass : 281 kWh/yr (-35%) 160kg/yr CO2 saved

A STRONG INFLUENCE ON THE ENERGY EFFICIENCY OF THE COLD CABINET DOORS

* EKO PRO


19 BUILDING GLASS

Low-E Gen 1

PROPERTY OF SAINT-GOBAIN

PREVENT EXTERNAL CONDENSATION ON THE GLAZING LOW U-VALUE

T surface of glazing

Outside surface (°C)

Ug (W/m².K)

Ar

Single glazingDGUs

T ambient

T cabinet

2°C

T surface

Dew point for HR 60%

CondensationNo condensation

Condition of non condensation:T glazing > Dew point

Outside

(store)Inside

(cooler)PROPERTY OF SAINT-GOBAIN


Ug (W/m².K)

Ar

T ambient

T cabinet

2°C



Condition of non condensation:T glazing > Dew point

T surface



Single glazingDGUs

Outside

(store)Inside


Ug (W/m².K)

Ar

T ambient

T cabinet

2°C



Glazing resistant to condensation in tough ambiences:

Ug ≤ 1,1


T surface

Single glazingDGUs

Outside

(store)Inside

(cooler)






Ug (W/m².K)

T ambient

T cabinet

2°C



ArAr Ar Ar Ar

22mm 20mm 18mm 16mm 14mm

Thick glazing = performing glazing !Mini recommended thickness: 22mm

Composition: 4 (14 Ar) 4 LowE

Total thickness

of the DGU

T surface



Outside

(store)

Inside


25 /



26 /

Low-E Gen 1

Ug-value 0.8 W/m².K Ug-value 1.2 W/m².K


External Light Reflection LReLight Transmission LT

LIGHT FACTORS

Light Transmission LT

Internal Light Reflection LRi

Norm : EN 410

Exterior of fridge Interior of fridge


MAXIMUM TRANSPARENCE & MINIMUM LIGHT REFLECTION

VLT 80%LR 12-15%

VLT 95% (+15%)LR 2% (- 10%)

VISION-LITE® IIStandard DGU


MAXIMUM TRANSPARENCE & MINIMUM LIGHT REFLECTION

VLT 80%LR 12-15%

VLT 95% (+15%)LR 2% (- 10%)

Anti-reflective DGUStandard DGU

Ug 1.1 Ug > 2

Poor energy saving!Condensation risk !


http://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0CAcQjRxqFQoTCPCB7LvsnMkCFcruGgodPI4HlQ&url=http://www.permisdeconduire-enligne.be/les-signaux-de-danger/&psig=AFQjCNG2-fOich2cFK2QxM_qUelqm5FwNQ&ust=1448034842358344

A SPECIFIC DEVELOPMENT FOR COMMERCIAL REFRIGERATION DOORS

Standard low-E DGU

VLT 80%LR 12%Ug 1.1

AR DGU

VLT 95%LR 2%Ug 2.5

Gas

SGG VISION-LITE 1.1 DGU

VLT 90%LR 2%Ug 1.1

Gas

AR

Low-E AR 3%

Perfect vision without compromise on both

energy savings and condensation resistancePROPERTY OF SAINT-GOBAIN

32 BUILDING GLASSPROPERTY OF SAINT-GOBAIN

Features Standard framed

door

Transparent

door gen 1*

Transparent

door gen 2**

Frameless design

Transparent vertical edges

Ug-value stability (gas retention)

Resistance to internal condensation

(humidity penetration)

Edge protection

* Transparent plastic

+ tape design

** i.e. SAINT-GOBAIN PURITY


35 / PROPERTY OF SAINT-GOBAIN

Hall 17 booth D70

[email protected]


LATEST INNOVATIONS ON ENERGY EFFICIENT GLASS … · A SPECIFIC DEVELOPMENT FOR COMMERCIAL...

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Transcript of LATEST INNOVATIONS ON ENERGY EFFICIENT GLASS … · A SPECIFIC DEVELOPMENT FOR COMMERCIAL...