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http://indianaquariumhobbyist.com/community/ :: View topic - DIY Peltier Chiller
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DIY Peltier Chiller
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Zakk
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PostPosted: Sun Jun 05, 2011 9:09 pm Post subject: DIY Peltier Chiller Reply with quote

 Hi!  
 
 Call  me  crazy  but  i  honestly  dont  see  the  need  for  me  to  invest  a  good  12  to  15k  on  a  chiller  that  i  need  just  4  months  a  year.  So  few  a  weeks  of  reading  and  i  have  decided  to  make  a  Peltier  chiller  for  my  latest  tank.  
 
 I  have  figured  out  how  to  wire  it,  the  heatsink,  connectivity  and  the  required  Peltier  plate  wattage  including  a  temp  controller.  
 
 I  need  some  help  with  a  cold  sink.  am  not  sure  if  i  should  get  a  stone  cutter  to  design  a  piece  of  marble  and  make  a  small  custom  "probe"  that  i  can  insert  into  the  box  section  of  a  HOB  filter  or  can  i  use  aluminium  and  attach  a  solid  piece  of  plastic  to  act  as  a  probe?  
 
 help  would  really  be  appreciated.
 
 thanks.


Last edited by Zakk on Sun Jun 05, 2011 9:28 pm; edited 1 time in total
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saikumar
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PostPosted: Sun Jun 05, 2011 9:14 pm Post subject: Re: DIY Peltier Chiller Reply with quote

 hello  Zakk,
 
 Can  you  elaborate  the  last  para.   Whats  the  probe  for?
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Zakk
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PostPosted: Sun Jun 05, 2011 9:17 pm Post subject: Re: DIY Peltier Chiller Reply with quote

 the  final  product  will  look  like  this  Sai.  i  need  help  with  the  white  probe  u  see  in  the  pic.
 
 Image  link
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random2
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PostPosted: Sun Jun 05, 2011 9:46 pm Post subject: Re: DIY Peltier Chiller Reply with quote

 Firstly,  Marble  as  cooling  medium??  are  you  sure?  
 Have  a  look  at  the  thermal  conductivity  of  materials  here  -  http://www.engineeringtoolbox.com/thermal-conductivity-d_429.html
 
 Could  you  explain  what  you  mean  by  'probe'?
 
 More  information  on  Marble/Plastic  probe  would  be  good.
 
 Keep  in  mind  -  Use  a  good  thermal  conductor  and  have  as  much  surface  area  in  contact  with  water  as  possible  for  better  results.
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random2
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PostPosted: Sun Jun 05, 2011 9:57 pm Post subject: Re: DIY Peltier Chiller Reply with quote

 Zakk,
 
 Just  saw  your  reply  to  Sai.
 
 You  just  cant  use  any  material  for  that  part.  It  has  to  be  a  good  thermal  conductor  so  that  it  cools  the  medium  (In  our  case  water).
 
 In  DIY  terms,  you  can  use  the  same  material  as  the  bottom  (a  aluminium  heatsink).
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Zakk
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PostPosted: Sun Jun 05, 2011 10:09 pm Post subject: Re: DIY Peltier Chiller Reply with quote

 Thanks  deepak.  Your  point  of  Surface  Area  is  something  i  hadn't  considered.  If  thats  the  case,  here  is  what  i  have  in  mind.
 
 ok  so  i  hookup  the  heat  conductor  using  a  standard  CPU  heatsink  with  the  fan  and  use  an  aluminium  heatsink  for  the  coldsink  side  as  well.  This,  i  fit  into  the  back  of  the  HOB  by  makin  a  cutting  the  size  of  the  sink.  
 
 Would  this  work?  or  will  the  aluminium  create  issues?  I  know  copper  is  a  no  no  due  to  its  corrosive  nature.
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Zakk
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PostPosted: Sun Jun 05, 2011 10:11 pm Post subject: Re: DIY Peltier Chiller Reply with quote

 Oh  perfect!  Thanks  deepak.  i  just  saw  your  reply  Razz
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random2
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PostPosted: Sun Jun 05, 2011 10:36 pm Post subject: Re: DIY Peltier Chiller Reply with quote

 Zakk,
 
 In  terms  of  materials  -  
 Good  ones  will  be  Silver  -  Copper  -  Aluminum
 
 You  wont  use  silver  (  Heck,  you  could  buy  a  chiller  itself  Smile  ).  Since  you  have  inverts,  copper  is  a  definite  no.  So  you  are  left  with  Aluminum.
 
 You  might  have  another  problem.  If  you  put  the  heatsink  inside  the  HOB  chamber,  water  might  spill  out  from  the  top.  Test  it  by  holding  a  heatsink  inside  the  HOB  before  building  it.
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essabee
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PostPosted: Mon Jun 06, 2011 5:43 am Post subject: Re: DIY Peltier Chiller Reply with quote

 Just  use  a  square  aluminum  (SS  would  be  best)  tube  section  on  the  filter  flow  line  for  the  Peltier  Chiller  and  a  thermostat  probe  in  your  tank  for  control.
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Zakk
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PostPosted: Mon Jun 06, 2011 7:59 am Post subject: Re: DIY Peltier Chiller Reply with quote

 @Deepak,
 
 Thank  you  for  that.  Yes.  You  have  a  point  there.  I  need  to  ensure  that  the  inflow  into  the  box  is  moderated  and  doesnt  over  flow.
 
 @essabee
 
 Am  sorry  but  you  lost  me  there.  "a  square  aluminum  (SS  would  be  best)  tube  section  on  the  filter  flow  line"  Am  assuming  you  are  referring  to  an  external  canister  filter,  but  i  intend  to  use  a  HOB  filter  and  the  only  inflow  line  will  be  submerged  into  the  water  in  the  tank.
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saikumar
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PostPosted: Mon Jun 06, 2011 10:43 am Post subject: Re: DIY Peltier Chiller Reply with quote

 Zakk,
 
 Do  you  have  a  picture  of  the  HOB  and  the  Peltier?  Want  to  figure  out  their  size  and  the  way  you  want  to  fit  em  in.
 
 BTW  for  you  to  note-  try  getting  the  slowest  HOB  you  can,  i.e.  lesser  the  l/h  more  effective  in  cooling  it  will  be.
 +  lesser  heat  from  the  small  pump.
 
 
 Thank  you.
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Matrix
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PostPosted: Mon Jun 06, 2011 1:30 pm Post subject: Re: DIY Peltier Chiller Reply with quote

 This  thread  may  help  a  bit
 http://indianaquariumhobbyist.com/community/modules.php?name=Forums&file=viewtopic&t=21567&start=0&postdays=0&postorder=asc&highlight=cooling+plate
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alpha91
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PostPosted: Mon Jun 06, 2011 7:38 pm Post subject: Re: DIY Peltier Chiller Reply with quote

 Interesting!  
 I  will  be  closely  following  this  thread!
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Zakk
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PostPosted: Mon Jun 06, 2011 7:58 pm Post subject: Re: DIY Peltier Chiller Reply with quote

 @Sai
 
 Sorry  bro.  no  pics  as  yet.  i  just  ordered  the  plates  and  the  adapter.  
 
 @Matrix
 
 No  offence,  but  2  mins  into  reading  that  post  I  knew  what  his  problems  would  be.  I  am  surprised  though  that  he  had  to  make  a  15v  stepdown  adapter.  I  find  them  here  very  easily.  His  setup  is  unwantedly  complicated  seeing  that  its  a  nano  reef.  FW  doesnt  need  all  that  much  work.  
 
 What  i  definatly  didnt  consider  is  the  fact  that  these  plates  that  i  intend  to  use  run  a  100  watts.  THATS  a  lotta  power  consumption  seeing  that  this  will  be  running  24/7  except  when  the  temp  is  at  the  preset  degree  which  will  be  controlled  by  the  digital  thermostat.  Summers  here  get  humid  and  the  water  temps  reach  easy  32c.  Any  one  able  to  throw  me  a  ball  park  figure  as  what  the  cost  would  be  to  run  this  lets  say  18  hours  a  day,  7  days  a  week  for  a  month?
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josyjames
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PostPosted: Mon Jun 06, 2011 8:18 pm Post subject: Re: DIY Peltier Chiller Reply with quote

 This  thread  is  going  interesting..   Will  keep  on  watching  the  thread.  Please  do  post  all  the  pics  step  by  step...
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