Hanita Contribution Grenoble, 11.9.2014

Annex65 Kick-off MeetingHanita Coatings - Dr Yoash Carmi Grenoble, September 2014

Agenda

Hanita – short description

Some of the challenges relevant to Annex65

Meeting these challenges – Hanita’s capabilities

Hanita’s suggested contribution to Annex65

Hanita Coatings offers 30 years’ expertise developing engineered polymeric films

• Converter of plastic films since 1983, focused on energy efficiency solutions - VIP, solar control window films, PV

• Headquarters, R&D,and manufacturing in Israel

• 195 staff, 10% R&D,8 overseas sales offices

Hanita offers a unique range of capabilities and processes under one roof

Challenges facing Annex65

How do we determine and correctly measure steady state ageing mechanisms?

λ vs.P – To have an accurate link between the thermal conductivity and the pressure for any core material (fast and easy to perform technique)

How do we deal with short term phenomena such as outgassing, absorption, solid thermal conductivity?

The effect of the panel dimensions on its degradation rate.

Flame retardant issues.

Life Time Calculator – how do we accurately predict the thermal behavior of panels along their service life (λ vs. t)?

Fumed silica cores – Accurate dependency of TC on percent of moisture absorbed (easier to perform and faster techniques)

Steady state permeation and short term phenomena

Pressure increase rate vs. time (days) inside fiberglass panel determined by measuring the thermal conductivity (ambient conditions)

0 20 40 60 80 100 120 140 1600

2

4

6

8

10

12

14

16

Days

Perm

abili

ty [

cc(S

TP)/

year

m2]

λ vs. P curves of 5 different fumed silica cores

0.001 0.01 0.1 1 10 100 10003

4

5

6

7

8

9

Pressure [mbar]

l[mW

/mK]

λ vs. P curves of 7 different fiberglass cores

0.0001 0.001 0.01 0.1 1 10 100 10000

5

10

15

20

25

30

35

Life time calculator – typing in the VIP parameters as installed in the refrigerator

Envelope types (the same laminate on both sides or hybrid) HybridIn case of hybrid the laminate facing the warm side V08311PIn case of hybrid the laminate facing the cold side V08621Pressure in mbar right after evacuation 0.05

VIP Thickness [mm] 12

VIP Length (m) 0.4

VIP Width (m) 0.6

Average storage temperature [°C] before operating the refrigerator 20

Average relative humidity [%] during storage 90

Storage duration [months] 12

Temperature at the cold wall during operation 5

Temperature at the warm surface during operation 20

Panel's thermal conductivity at the end of life [mW/ m·K] 10

Maximum moisture absorption by the desiccant [% of mass] 30

λ effective of the panel along the refrigerator lifetime

0 5 10 15 20 252

4

6

8

10

12

14

Operation time of the refrigerator [years]

λ [m

W/

m·K

]

Effective thermal conductivity along fridge service life

Meeting the challenges – Hanita’s capabilities

The mVIP system (direct pressure measurement

Benefits:• 100% vacuum tight connection

to envelope• Resolution better than 10-4mbar• Enables sample preparation

within minutes• Allows continuous pressure

measurement• Allows easy RGA analysis of gas

content

The λ vs P system (24 hours to complete λ vs. P curve)

Can be used also to determine the relation between % of moisture content and TC for fumed silica cores

Thank you!Remarks? Questions?yoash@hanitacoatings.com