Presentation for RTD trainees - StorHy Hydrogen Storage
Presentation for RTD trainees - StorHy Hydrogen Storage
Presentation for RTD trainees - StorHy Hydrogen Storage
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Source: BAM<br />
AE<br />
criterion<br />
10<br />
<strong>Hydrogen</strong> and Fuel Cell Review Days 2007, Brussels 10th-11th October<br />
1<br />
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9<br />
Back up<br />
<strong>StorHy</strong>: C-H 2 Vessel Production -<br />
Quality Survey during Autofrettage<br />
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Normalized internal pressure<br />
Defect<br />
type I<br />
1<br />
0,8<br />
0,6<br />
0,4<br />
0,2<br />
(cylinder 1)<br />
test pressure<br />
autofrettage pressure (yileding of metal liner)<br />
nominal working pressure (15°C)<br />
residual strain of wrapping after autofrettage<br />
burst pressure<br />
0<br />
0 0,2 0,4 0,6 0,8 1<br />
Defect<br />
type I<br />
(cylinder 2)<br />
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Defect<br />
type II<br />
(cylinder 3)<br />
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Normalized strain<br />
Acoustic Emission (AE)<br />
Example:<br />
Typ III (CNG) cylinder = metal liner<br />
with full CF/Epoxy wrapping<br />
Defect<br />
type II<br />
(cylinder 4)<br />
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“Defect”<br />
type III<br />
(cylinder 5)<br />
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fibre break<br />
Normalised values<br />
1,0<br />
0,8<br />
0,6<br />
0,4<br />
0,2<br />
strain intensity<br />
0,0<br />
0,0 0,2 0,4 0,6 0,8 1,0<br />
Normalised autofrettage pressure<br />
AE accumulation<br />
AE Quality Survey<br />
Concepts:<br />
� Successful in<br />
detecting every<br />
manufacturing<br />
defect by at least 2<br />
of 10 developed AEcriteria!<br />
see: �
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