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http://indianaquariumhobbyist.com/community/ :: View topic - metal halide - light bill
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metal halide - light bill
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nanomania
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PostPosted: Tue May 24, 2011 12:12 pm Post subject: metal halide - light bill Reply with quote

 hi,
       i  stay  in  south  mumbai,  i  want  to  know  how  many  units  are  consumed  if  i  hae  a  70watt  MH  on  for  6  hours  everyday......  if  someone  knows  the  bill  amt,  they  can  tell  me  tht  too...   saw  the  calculation  chart,  but  all  are  confusing.......
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saikumar
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PostPosted: Tue May 24, 2011 12:22 pm Post subject: Re: metal halide - light bill Reply with quote

 Post  the  chart  here  that  has  rate  slabs,  specifically  the  one  local  to  you.
 I  can  help  just  like  most  of  the  rest.
 
 Cheers!
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aquariumer
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PostPosted: Tue May 24, 2011 12:29 pm Post subject: Re: metal halide - light bill Reply with quote

 12600  units/month
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nanomania
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PostPosted: Tue May 24, 2011 12:42 pm Post subject: Re: metal halide - light bill Reply with quote

 A  warehouse  has  25  -  400  watt  metal  halide  fixtures  and  20  -  2  lamp  4  foot  fluorescent  fixtures  that  are  on  24  hours  per  day.  What  is  the  daily  cost  to  light  the  warehouse  at  $0.08/kWh?
 
   
 
 Metal  Halide  =  25  x  450  watts/fixture  (lamp  +  ballast)  =  11,250  watts
 
 Fluorescent  =  20  x  100  watts/fixture  (lamps  +  ballast)  =  2,000  watts
 
   
 
 11,250  +  2,000  =  (13,250  watts  x  24  hours)  /  1,000  watts/kW  =  318  kWh  per  day
 
 318  kWh  x  $0.08/kWh  =  $25.44  per  day  to  light  the  warehouse.
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nanomania
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PostPosted: Tue May 24, 2011 12:43 pm Post subject: Re: metal halide - light bill Reply with quote

 Convert  500  W  to  kW  by  dividing  by  1,000:  500/1000  =  0.5  kW
 
 Multiply  the  kW  by  the  hours:  0.5  kW  x  10  hours  =  5  kWh  =  5  units  of  electrical  energy.
 
 To  get  the  daily  cost,  multiply  the  daily  kWh  by  the  unit  cost.
 
 BUT
 
 The  power  usage  is  0.5  kw,  and  it  does  not  matter  how  long  it  is  on.  When  it  is  off,  the  power  usage  is  0.  You  are  confusing  power  and  energy.  Energy  is  power  multiplied  by  time.  The  unit  of  energy  is  kilowatt  hours,  i.e.,  the  power  in  kilowatts  times  the  time  in  hours.
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nanomania
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PostPosted: Tue May 24, 2011 12:43 pm Post subject: Re: metal halide - light bill Reply with quote

 these  r  the  stuff  iv  got  from  the  net......
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sid_p
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PostPosted: Tue May 24, 2011 12:49 pm Post subject: Re: metal halide - light bill Reply with quote

 It  will  be  12.6  units  per  month  based  on  your  consumption...per  unit  charge  you  can  get  from  your  latest  bill
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jack86
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PostPosted: Tue May 24, 2011 1:02 pm Post subject: Re: metal halide - light bill Reply with quote

                                                   
aquariumer  wrote  (View  Post):                
12600  units/month                

   Surprised   No  way!!  You  went  wrong..VERY  VERY  wrong  with  the  calculations  somewhere...you  are  imlplying  that  people  using  150W  MH  pay  12600*2(150W  instead  of  75)*5(unit  cost)  =  1,26,000  Rs  per  month   Drinking  
 
 
                                                 
nanomania  wrote  (View  Post):                

   70watt  MH  on  for  6  hours  everyday......  if  someone  knows  the  bill  amt,  they  can  tell  me  tht  too...   saw  the  calculation  chart,  but  all  are  confusing.......
                 

 
 Calculations  are  simple.  Just  keep  basics  in  mind.
 
 I  unit  =  1000  W  or  1KW  of  electricity  consumption.  We  pay  bill  based  on  units  consumed.  I  usually  hit  the  5.5Rs/unit  slab.
 
 A  70W  MH  running  for  6  hours  in  a  day  will  consume  420W,  in  a   month  -  420*30  =  12600  (@aquariumer  -  you  stopped  here.  No  step  marking  -  unlike  good  ol'  schools  days  Razz).  Thats  the  wattage  consumed  over  a  month.  Divide  it  by  1000  to  get  the  figure  in  KW  -  that  is  same  as  units  consumed  i.e  12.6.  Multiply  it  with  rate.  12.6  X  ~5  =  63  Rs/month.
 
 
 That  is  cheap!  or  did  I  go  wrong  anywhere  Drinking
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jerin111111
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PostPosted: Tue May 24, 2011 1:09 pm Post subject: Re: metal halide - light bill Reply with quote

 heavy  calculations
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jack86
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PostPosted: Tue May 24, 2011 1:59 pm Post subject: Re: metal halide - light bill Reply with quote

                                                   
jerin111111  wrote  (View  Post):                
heavy  calculations                

 
 Let  me  simplify.
 
 Cost  per  month  =  W*d*U*30/1000
 
 where
 
 W  =  consumption  in  watts
 d  =  duration  per  day
 U  =  unit  cost
 
 for  the  above  case,  elec  bill  =  70*6*5*30/1000  =  63  Rs/month.
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nanomania
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PostPosted: Tue May 24, 2011 2:36 pm Post subject: Re: metal halide - light bill Reply with quote

 here  in  south-mumbai  its  6.5  per  unit
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Amazonian2010
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PostPosted: Tue May 24, 2011 3:44 pm Post subject: Re: metal halide - light bill Reply with quote

 Surprised   Surprised   Surprised   Surprised   Surprised
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saikumar
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PostPosted: Tue May 24, 2011 6:09 pm Post subject: Re: metal halide - light bill Reply with quote

 Hey  Raj,
 
 Is  it  lesser  in  Hyderabad??
 More  over  its  a  variable  slab,  if  you  burn  more,  the  Unit  charge  is  more.
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Amazonian2010
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PostPosted: Tue May 24, 2011 6:22 pm Post subject: Re: metal halide - light bill Reply with quote

 No  Idea  Sai....Iam  not  having  any  tanks  with  MH  at  the  moment.Just  surprised  with  so  much  calculations.
 By  the  way  your  location  also  says  that  you  are  from  same  place...so  why  asking?  
 
 Raj
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nanomania
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PostPosted: Tue May 24, 2011 6:42 pm Post subject: Re: metal halide - light bill Reply with quote

 mumbai  is  blody  expensive..........
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