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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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saikumar
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PostPosted: Thu Apr 23, 2009 6:17 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

 Hi  Tirtha,
 How  about  posting  the  humidity  too?  Chuckle  you  have  posted  nearly  all  the  parameters  to  cool  down.
 And  do  post  the  pic  of  the  monstor[??]  fan.
 
 Just  let  me  know  if  you  need  any  help  over  making  any  circuitry  to  get  a  balance  b/w  temp  and  on/off  of  your  fan.  
 
 Well  if  you  dont  want  dry  air,  have  a  air-cooler{water  thing?  not  AC}  at  home  Thumb Up  cools  both  you  and  tanks
 
 Cheers!
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Tirtha C
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PostPosted: Thu Apr 23, 2009 6:28 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

                                                   
saikumar  wrote  (View  Post):                
Hi  Tirtha,
 How  about  posting  the  humidity  too?  Chuckle  you  have  posted  nearly  all  the  parameters  to  cool  down.
 And  do  post  the  pic  of  the  monstor[??]  fan.
 
 Just  let  me  know  if  you  need  any  help  over  making  any  circuitry  to  get  a  balance  b/w  temp  and  on/off  of  your  fan.  
 
 Well  if  you  dont  want  dry  air,  have  a  air-cooler{water  thing?  not  AC}  at  home  Thumb Up  cools  both  you  and  tanks
 
 Cheers!                

 
 How  to  measure  humidity  at  home?????  
 
 Air  cooler  will  not  work,  tried  that  last  year.  It  will  lower  the  temperature  of  the  room  a  bit  but  will  increase  the  humidity  fast.  And  evaporation  rate  will  go  down.  
 
 But  400ltr  20degree  water  is  already  cooling  down  the  room  temperature  a  bit.   Chuckle  
 
 Let  me  know  if  you  can  guide  me  on  the  circuitry  (Means  if  you  can  manage  some  time  to  make  one  for  me.   ROFL  )
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Tirtha C
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PostPosted: Thu Apr 23, 2009 6:32 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

                                                   
sandeepraghuvanshi  wrote  (View  Post):                
Tirath
 You  can  have  your  fans  on  timer,  that  might  help.                

 
 Thats  a  good  option.  If  can't  find  any  otherway,  will  go  for  another  timer.
 
 
                                                 
Alistair  wrote  (View  Post):                

 Is  replacing  the  8"  fan  to  a  lesser  powerful  fan  an  option?
                 

 
 Tried  that  with  3"  Fans.  But  not  much  effective.
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ravi
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PostPosted: Thu Apr 23, 2009 6:44 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

                                                   
T2CHATTO  wrote  (View  Post):                
How  to  measure  humidity  at  home?????                  

 
 http://www.calright.com/pd_1082.aspx
 
 http://www.amazon.com/gp/product/images/B0006VBBCO/ref=dp_image_0?ie=UTF8&n=286168&s=garden
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bmvbab
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PostPosted: Thu Apr 23, 2009 6:46 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

 A  timer  combined  with  removing  the  bigger  fan  might  help,  check  this  link  out  for  the  circuit:
 Fan  control  circuit  diag
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nash81
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PostPosted: Thu Apr 23, 2009 8:03 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

 A  simple  and  effective  method  would  be  to  attach  a  Common  Fan  regulator  we  use  at  our  homes.  That  way  you  can  control  the  speed  of  the  fan.  If  they  are  DC  Fans  you  can  reduce  the  Current  and  that  way  you  reduce  electicity  consumption  as  well.  For  220V  fans  ,  Regulators  are  a  good  option.  I  was  using  that  in  my  marine  tank  before  i  swtiched  to  the  12V  DC  fans.  In  which  i  have  used  a  variable  supply  so  if  i  want  to  run  the  fans  slowly  i  just  reduce  the  current.
 
 Warm  Regards
 Nirav  Shah
 Indiapetstore.com
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shameek
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PostPosted: Thu Apr 23, 2009 8:03 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

 @  Tirtha  da,  I  think,as  you  have  a  very  dry  weather  so   high  rate  evaporation  occurs  and  this  drops  down  the  temp   of  your  tank......but  20  deg  c!!!!!!!!!  it's  a  huge  drop  in  temp!!
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madhu_ulysses
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PostPosted: Thu Apr 23, 2009 8:09 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

 1.  You  have  an  ambient  temp  of  40-41  C  inside  your  house?  And  you  dont  get  dehydrated?   Surprised  
 2.  If  your  ambient  temp  is  40  and  without  any  cooling  on  an  open  top  tank,  a  10  C  difference  in  temp?   Surprised   Surprised  Without  any  external  cooling,  the  difference  between  an  open  top  tank  and  the  ambience  is  generally  not  more  than  4-5  C.
 3.  If  the  fans  have  brought  down  the  temp  to  20  C,  even  before  it  reaches  half  way  of  that,  the  ambient  temperature  will  try  to  cook  it  up,  unless  you  heat  shield  atleast  3  sides  of  your  tank.   Thats  because,  your  fan  will  try  to  cool  it  only  from  the  top,  whereas  the  ambience  will  cook  it  from  all  6  directions.
 
 Please  check  your  thermometeres!
 
 And  for  a  solution,  if  at  all  you  want  to  have  a  standard  temperature,  you  can't  work  on  a  solution  until  you  measure  how  much  your  fans  are  further  gonna  cool  your  water  below  the  ambience.   because,  the  only  possibility  this  could  happen  is,  your  ambience  goes  close  to  20  C  during  nights  which  again  would  be  a  phenomenon  in  dry  tropical  summer  without  rains,  and  if  you  had  rains,  your  ambience  will  no  where  be  close  to  40  during  day.
 
 One  more  parameter  is,  with  filters,  you  will  be  having  even  temperature  all  over  the  tank.   If  you  had  still  waters,  the  fans  will  make  the  hotter  water  which  will  be  on  the  top  to  evoporate  and  leaving  the  cooler  water  down.   Now  with  filters  running  and  circulating  water,  your  fans  have  to  take  longer  than  stagnant  water  to  bring  out  evoporation  itself.
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nash81
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PostPosted: Thu Apr 23, 2009 8:15 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

 @shameek
 I  had  seen  a  similar  drop  in  Bappa's  tank  as  well  with  the  fans  that  i  had  installed  at  his  place.  Even  the  temperature  in  his  tank  dropped  drastically.  Both  tritha  and  bappa  live  in  similar  environments.
 
 Warm  Regards
 Nirav  Shah
 Indiapetstore.com
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Tirtha C
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PostPosted: Thu Apr 23, 2009 10:22 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

                                                   
madhu_ulysses  wrote  (View  Post):                
1.  You  have  an  ambient  temp  of  40-41  C  inside  your  house?  And  you  dont  get  dehydrated?   Surprised  
 2.  If  your  ambient  temp  is  40  and  without  any  cooling  on  an  open  top  tank,  a  10  C  difference  in  temp?   Surprised   Surprised  Without  any  external  cooling,  the  difference  between  an  open  top  tank  and  the  ambience  is  generally  not  more  than  4-5  C.
 3.  If  the  fans  have  brought  down  the  temp  to  20  C,  even  before  it  reaches  half  way  of  that,  the  ambient  temperature  will  try  to  cook  it  up,  unless  you  heat  shield  atleast  3  sides  of  your  tank.   Thats  because,  your  fan  will  try  to  cool  it  only  from  the  top,  whereas  the  ambience  will  cook  it  from  all  6  directions.
 
 Please  check  your  thermometeres!
 
 And  for  a  solution,  if  at  all  you  want  to  have  a  standard  temperature,  you  can't  work  on  a  solution  until  you  measure  how  much  your  fans  are  further  gonna  cool  your  water  below  the  ambience.   because,  the  only  possibility  this  could  happen  is,  your  ambience  goes  close  to  20  C  during  nights  which  again  would  be  a  phenomenon  in  dry  tropical  summer  without  rains,  and  if  you  had  rains,  your  ambience  will  no  where  be  close  to  40  during  day.
 
 One  more  parameter  is,  with  filters,  you  will  be  having  even  temperature  all  over  the  tank.   If  you  had  still  waters,  the  fans  will  make  the  hotter  water  which  will  be  on  the  top  to  evoporate  and  leaving  the  cooler  water  down.   Now  with  filters  running  and  circulating  water,  your  fans  have  to  take  longer  than  stagnant  water  to  bring  out  evoporation  itself.                

 
 Madhu,  I  know  this  is  really  hard  to  believe  but  please  believe  me.  It's  happening.  
 
 As  you  said,  lets  assume,  the  Thermometer  is  giving  me  a  wrong  reading.  Lets  assume  the  starting  temp  is  not  30  degree  but  28  degree.  But  the  same  thermometer  is  showing  me  10  degree  drop  after  36  hrs.  This  difference  of  the  temperature  drop  can't  be  wrong.  And  I  checked  it  with  3  different  thermometers,  and  the  reading  is  same.  But  again,  I  will  check  this  with  another  calibrated  digital  thermometer  this  weekend.
 
 Ambient  Temperature  is  40-41,  by  that  I  meant  out  side  temperature.  But  the  tank  is  placed  just  a  feet  away  from  an  open  window.  And  you  are  right.  Here  you  will  be  dehydrated  even  before  you  can  feel  it.  No  sweat  but   scorching  heat  and  dry  rough  skin  with  bleeding  nose.
 
 And  I  am  running  one  2217  and  a  700lph  driven  CO2  reactor  in  this  tank.  So  guess  I  have  enough  circulation.
 
 Take  a  look  at  the  pictures  below.  
 
 This  is  the  8"  65watt  Fan.
 
 
 
 And  here,  how  I  have  installed  it  between  my  2  MH.  Distance  from  water  surface  is  1  feet.  See  the  distance  of  the  tank  from  the  Open  window.
 
 
 
 
 Another  thing  I  forgot  to  specify.  Both  of  my  MH  are  burning  8hrs  a  day  non  stop.
 
 @Nash,  thanks  a  lot  bro  for  that  regulator  idea.  But  before  installing  that,  this  weekend  I  will  spend  some  hours  at  Bhangar  Shops,  to  find  out  a  thermostat  from  a  broken  AC.  Let  me  see  if  I  can  get  one.
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Tirtha C
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PostPosted: Thu Apr 23, 2009 10:26 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

                                                   
ravi  wrote  (View  Post):                
                                                 
T2CHATTO  wrote  (View  Post):                
How  to  measure  humidity  at  home?????                  

 
 http://www.calright.com/pd_1082.aspx
 
 http://www.amazon.com/gp/product/images/B0006VBBCO/ref=dp_image_0?ie=UTF8&n=286168&s=garden                

 
 Thanks  for  the  links  Ravi  Sir.  But  these  are  too  costly.  Sad  Now  I  can  remember,   I  saw  some  Chinese  table  clock  which  are  having  All  these  digital  readings.  Will  find  out  one,  but  not  sure  how  accurate  those  will  be.  Very Happy
                                                 
bmvbab  wrote  (View  Post):                

 A  timer  combined  with  removing  the  bigger  fan  might  help,  check  this  link  out  for  the  circuit:
 
 Fan  control  circuit  diag
                 

 
 Thanks  for  the  diagram.  Will  send  it  to  Sai.  Lets  see  if  he  can  decode  it  and  come  up  with  something.  Smile
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PostPosted: Thu Apr 23, 2009 10:28 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

 Thanks  for  the  picture.
 
 Is  the  fan  blowing  air  on  the  water  surface  or  is  is  sucking  air  away  from  the  water  surface  ?
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swapnils
Regular Poster on IAH
Regular Poster on IAH



Joined: Oct 10, 2007
Posts: 829
Location: Borivali (W), Mumbai, India

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PostPosted: Thu Apr 23, 2009 10:52 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

                                                   
T2CHATTO  wrote  (View  Post):                
Ravi  Sir,
 
 Ambient  Temperature  40-41  degree
 Tank  Temperature  (Before)  30  degree
 Tank  Temperature  (36hrs  After)  20  Degree
 
 I  know,  It  sounds  unbelievable.  But  please  believe  me.   Crying or Very sad                

 
 I  think  it  is  possible  after  looking  at  this  site.
 Gurgaon
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Tirtha C
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Committed Member of IAH



Joined: Feb 24, 2007
Posts: 4066
Location: Miyapur, Hyderabad

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PostPosted: Thu Apr 23, 2009 11:01 pm Post subject: Re: Too Much Cooling :: Need to control Reply with quote

                                                   
Madan  wrote  (View  Post):                
Thanks  for  the  picture.
 
 Is  the  fan  blowing  air  on  the  water  surface  or  is  is  sucking  air  away  from  the  water  surface  ?                

 
 Sir...  It's  blowing  the  air  on  the  water  surface.
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madhu_ulysses
Committed Member of IAH
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Joined: Oct 28, 2004
Posts: 2450
Location: Salem, TN

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PostPosted: Fri Apr 24, 2009 8:02 am Post subject: Re: Too Much Cooling :: Need to control Reply with quote

 Just  close  those  windows  and  try  taking  the  readings  again.
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