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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? [email protected]