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http://indianaquariumhobbyist.com/community/ :: View topic - Too Much Cooling :: Need to control
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Too Much Cooling :: Need to control
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Tirtha C
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Joined: Feb 24, 2007
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PostPosted: Fri Apr 24, 2009 4:07 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

                                                   
johnny  wrote  (View  Post):                
But  why  aluminium  pipe?  I  expected  that  this  would  basically  be  like  having  a  sump  and  dumping  ice  blocks  in  the  sump,  only  here  we  expect  evaporation  to  take  over  the  role  of  icecubes.  Please  suggest  if  I  am  missing  something  in  the  setup.
 
 But  as  such,  that  is  also  another  option  I  had  considered  for  cooling.  Having  the  water  flow  through  long  spiral  coils  of  metal  pipe  and  the  fans  blowing  over  these  pipes  rather  than  into  the  tank.  But  I  dropped  it  cos  the  best  metal  option  suggested  is  copper  which  is  often  mentioned  as  a  big  no-no  in  aquariums.  And  second,  the  heat  here  in  my  house  in  Chennai  is  high  enough  that  even  the  fans  blow  only  hot  air.  So  I  had  to  rethink  how  efficient  it  will  be  in  actual  setup  when  it  really  matters.                

 
 Johny..  you  should  not  blow  the  air  on  pipe.  Put  the  pipe  under  water  and  blow  air  on  that  water  so  it  become  chilled.  But  I  don't  know  how  effective  this  will  be  at  your  place.  Chennai  is  a  high  humid  place  like  Kolkata.
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Madan
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PostPosted: Fri Apr 24, 2009 4:55 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

                                                   
johnny  wrote  (View  Post):                
Hi  guys,  just  a  thought  based  on  the  discussion  so  far.  Apologizing  to  Tirtha  first  for  going  a  bit  off  topic  on  this  thread.  But  I  was  just  wondering.  If  the  earthern  pot  can  really  get  that  low  temperature,  wouldnt  it  be  really  economical  to  use  a  large  earthern  pot  as  a  sump?                  

 
 Yes  IF  you  live  in  a  hot  and  dry  area.
 
 The  tank  temperature  will  take  a  while  to  drop  and  then  stabilise  very  well,  you  can  speed  it  up  by  exhausting  (as  in  replacing)  the  air  around  the  pot.
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johnny
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PostPosted: Fri Apr 24, 2009 4:58 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

 oh  ok.  Noted.   Smile  
 What  I  was  mentioning  was  an  inefficient  version  of  the  concept  used  in  AC,  fridges  etc.  But  they  would  used  a  closed  loop  system  and  a  truly  efficient  coolant.
 I  am  guessing  PK  would  have  used  an  advanced  concept  of  this  in  his  DIY  chiller.  Eagerly  following  the  post  to  see  his  setup.
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johnny
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PostPosted: Fri Apr 24, 2009 5:05 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

 Thanks  Madan.  I  guess  then  it  might  not  work  in  my  place.  Its  more  like  a  sauna.  We'd  start  to  sweat  within  minutes  of  stepping  in  and  the  fans  are  hardly  any  help.  I  guess  the  dry  part  wont  be  applicable  then.  But  I  guess  I  could  try  it  on  small  scale  on  my  nano  which  currently  has  only  a  few  shrimp.  The  night  temperature  drops  to  28C  in  the  AC  (thats  my  preferred  AC  setting)  and  day  temp  goes  to  32C.  I  can  move  it  out  and  see  if  I  can  get  a  stable  temperature  with  such  a  setup.
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msghael
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PostPosted: Tue Jun 09, 2009 4:29 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

 Hi  Tirtha,
 I  know  this  is  an  old  post  and  you  may  have  solved  the  problem.  I  was  away  and  not  logging  on  for  quite  some  time.
 Temp  control  as  you  want  is  possible  if  you  use  a  RTD  sensor  for  the  measurement  and  a  controller  to  switch  the  fan  on  /  off  at  the  set  points.  When  the  temp  drops  to  the  set  point  the  controller  switches  the  fan  off  and  when  it  rises  again  the  fan  is  turned  on.  The  dead  band  -  fan  off  to  fan  off  -  can  be  adjusted  if  you  use  a  suitable  controller  with  2  set  points.  The  temp  fluctuation  can  be  within  a  few  degrees.   If  the  controller  contact  rating  is  insufficient  you  can  use  a  relay.  Using  a  heater  with  the  fan  running  makes  no  sense.  With  thermostats  the  temp  band  is  generally  fixed.
 Regards
 Maninder
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saikumar
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PostPosted: Tue Jun 09, 2009 5:05 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

 Hi  Maninder,
 
 Vignesh  did  post  about  the  same  arrangement  with  a  ckt  diagram,  2nd  page  Thumb Up  
 
 
                                                 
saikumar  wrote  (View  Post):                

 and  yes  Vignesh's  circuit  must  work,  just  replace  the  alarm  with  your  fan.  But  since  its  not  digital,  getting  hold  of  the  temperature{adjusting  vr1}  to  trip  off  is  gonna  be  trial  and  error.                

 ^3rd  page
 
 Thankyou.
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nitin28
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PostPosted: Thu Apr 22, 2010 2:11 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

 my  aquarium  temrature  always  show  34-35  dgree  but  i  have  instaled  1  cpu  fan  12  volt  
 my  tank  temprature  is  down  25-26  dgree  
 
 http://yfrog.com/ed1002061pj
 http://yfrog.com/j41002060gj
 http://yfrog.com/1q1002059rj
 
 thanks  
 nitin  gurgaon
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nash81
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Joined: Feb 05, 2008
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PostPosted: Thu Apr 22, 2010 5:10 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

 Hi  Nitin,
 
 Say  thankyou  Gurgaon  for  it  !  ...Come  june  /  July  the  same  may  not  happen.  Its  like  how  Room  Water  coolers  are  effective  now  and  not  as  much  in  the  summer  down  the  line.
 
 Warm  Regards
 Nirav  Shah
 Indiapetstore.com
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Scorpio
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PostPosted: Fri Apr 23, 2010 10:02 am Post subject: Re: Too Much Cooling :: Need to control Reply with quote

 I  am  also  using  this  brand  4  inch  fan  in  my  4  footer.  The  temperature  of  my  tank  is  25  degree  Celsius.  You  have  many  options  to  bring  temperature  23  degree  Celsius.
 1.  Change  the  fan  to  4  or  6  inch.
 2.  Use  timer.
 3.  Off  the  fan  at  night  but  it  will  change  the  temperature  rapidly.  I  think  this  will  be  harmful  for  plants  and  fish.
 4.  As  Bappa  suggest,  install  a  heater  ..........  ha..........  ha...........ha
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