Vent subsystem design specifications for use in fuel cell assembl

Hess, P. D.

English

NASA Technical Reports Server

' ; i i i  jcsct: Vent  Subsystem - DcvclopiIit-:it 1'1 i t i ,  A r t i v i t y  175  
Ui.< t r i t u t  ion: J ,  I,, P l a t n e r ,  E), P. G h c r e ,  11 E LOC!I~ : J ,  .  R U  I - iur ley,  
J .  E.. Ward,  C ,  R ,  M a r t i n ,  G ,  Jolirison 
1 A 5 s I grime i A t  
' T h e  inc:ividual t o  whom t h i s  memorandum is d i r e c t e d  is dssignei!  t h r  
d,ksign e f ior t  r+sponsibi!iry of evolving the d e s i g n  speci!ic-+tiorl, crawir ig  ( 5  1 ,  
anci /or  func t iona l  diagrarris G f  the s u b j e c t  d u t s y s t e i n ,  (Acti-:ity 175 - 37rl)- 
111 addition d n y  t c s t s  evolved w i l l  iollow the path f r o m  Event  1 7 5  through 
' 
4C5 on t u  580 shd l l  be p e r f o r m e d  ,ind r r p o r t e d  on, along u i ! h  p e r i o d i c  a 
suhsys t e t r i  d e s i g n  r ev iews .  
a l l  date3 s<.t f c r f h  i n  the P a r t  I11 PERT T'rogrzm I'lan, 
A concl r t e d  sttcrr!pt should be xnarlc to meet 
2 .  F L i  11c t i u  n 
( 3 )  Reactant vent ing  i r 1  c a s e  o i  o v e r - p r e s s u r i z a t i o n  ui t I , in  tlie I.'CLAo 
(THRU) 
N67 25980  
3 
u 
https://ntrs.nasa.gov/search.jsp?R=19670016651 2020-03-12T11:27:31+00:00Z
- I .  . 
( c )  W a t e r  vapor  vent  for d i s c h a r g e  of tllc prwiuc t  w a t e r  
( t i )  Cont<Lminated w a t e r  dump f o r  expel l ing any writer i n  t h e  
WKS w i t h  a pH above  9 ,  O c  
( e )  Secondary  coolant  purge  in  the  e v e n t  uf contanl i t la t ion,  over- 
p r e s s u r i z a t i o n ,  and f o r  s t a r t - u p  a n d / o r  shutduwn, 
Tile r3actclnt  ven t ing  in  c a s e  of o v c r p r r s s u r e  wil l  bc ac.corrip1ishi.d b y  meane 
uf .I relief va lve  d o w n s t r e a m  of the r e , i i t a r i t  p r c s s u r e  r cgu l ' i i u r s  ,in 1 will  be 
d t.)drt of the r e a c t a n t  c o n t r u l  s\Lb:iysteXll. ?'he re3ctant  p u r g e  w i l l  a lso  bc a 
I a r t  of the reac tan t  control suhsys t en i .  
is t,eing c:Iinsidcred a5 a p a r t  ut  t!ie mois ture  renic)v<il s u b s y s t c r r ~ ,  
L CintaIyiinaterl w a t e r  dump *A i l l  \P  i nc .o rpora t t . d  irito the  w a t e r  rr?L.;)vt.ry su?,- 
s y 3 terr. 
Tlit w t i t c r  vapor  vent r t -quirznien:  
Tilt. 
']'he status of the s e c o x d a r y  coolan t  purgtx w i l l  tiepend ~ i p o n  w h e t h e r  he l iun i  
or ilycircigen is u s e d  a s  the secono.i:Ary cool ' int ,  
for  the  s e c o n d a r y  coblant 
2 to 3 p s i  # r e n t e r  t han  e i t h c r  rv ' ic tant  p r e s s u r e ,  A lcak w h i c h  wcliild r e s u l t  
i n  d loss uf  lieliuin % i l l  be rfxi)lk niShcd from a Storage  tank through ,I r c g u -  
l n t o r .  
H ~ ~ ~ u I T ?  1 s  the p r e s e n t  s e l e c t i o n  
It wil l  be m a i r t < i i n e d  i n  the  can i s t e r  at a p r e s s u r e  
Nu au tomat ic  \venting w i l l  be required,  
If hydrogen  should subsequen t ly  bc seltlctcd a s  :he seconr ia ry  c.ooIatit, it 
w i l l  r e q u i r e  s o m e  safety dev ices  A n d  d s u i t a b l e  p u r g e  s y s t e m ,  The h y J r o g c r ;  
- 2 -  
5, 
D t: v e  lo pme n t A r e  a. 
Tfic r4tAve!c)pme:it e f fo r t  for  t1,e v,?nt s u b s y s t e m  w i l l  cons i s t  o f  thc design 
L . n !  a n d l y h i s  w o r k  n e c c s s  i r y  t ( ?  e v o l v e  the Jes ign  spec i f i c f i t i on ,  d r a w i n g  (SI, 
cinil/ or scliematic: d i a g r a m s  of t h r  vent  subsys t em.  
- 1 -  


Vent subsystem - development plan

Abstract

Similar works

Full text

Available Versions

NASA Technical Reports Server