| View previous topic :: View next topic |
| Author |
Message |
nanomania
Regular Poster on IAH
Joined: May 16, 2011
Posts: 1065
Location: mumbai (south)
Status: Offline
|
 Posted: Tue May 24, 2011 12:12 pm Post subject: metal halide - light bill |
 |
|
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....... |
|
|
| Back to top |
|
 |
saikumar
Committed Member of IAH
Joined: Jan 30, 2007
Posts: 2226
Location: HYD-is-good
Status: Offline
|
| Posted: Tue May 24, 2011 12:22 pm Post subject: Re: metal halide - light bill |
|
|
Post the chart here that has rate slabs, specifically the one local to you.
I can help just like most of the rest.
Cheers! |
|
|
| Back to top |
|
|
aquariumer
Regular Poster on IAH
Joined: Sep 06, 2010
Posts: 1115
Location: The Hague
Status: Offline
|
| Posted: Tue May 24, 2011 12:29 pm Post subject: Re: metal halide - light bill |
|
|
| 12600 units/month |
|
|
| Back to top |
|
|
nanomania
Regular Poster on IAH
Joined: May 16, 2011
Posts: 1065
Location: mumbai (south)
Status: Offline
|
| Posted: Tue May 24, 2011 12:42 pm Post subject: Re: metal halide - light bill |
|
|
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. |
|
|
| Back to top |
|
|
nanomania
Regular Poster on IAH
Joined: May 16, 2011
Posts: 1065
Location: mumbai (south)
Status: Offline
|
| Posted: Tue May 24, 2011 12:43 pm Post subject: Re: metal halide - light bill |
|
|
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. |
|
|
| Back to top |
|
|
nanomania
Regular Poster on IAH
Joined: May 16, 2011
Posts: 1065
Location: mumbai (south)
Status: Offline
|
| Posted: Tue May 24, 2011 12:43 pm Post subject: Re: metal halide - light bill |
|
|
| these r the stuff iv got from the net...... |
|
|
| Back to top |
|
|
sid_p
Regular Poster on IAH
Joined: Mar 19, 2009
Posts: 324
Location: Eindhoven, The Netherlands
Status: Offline
|
| Posted: Tue May 24, 2011 12:49 pm Post subject: Re: metal halide - light bill |
|
|
| It will be 12.6 units per month based on your consumption...per unit charge you can get from your latest bill |
|
|
| Back to top |
|
|
jack86
Regular Poster on IAH
Joined: Sep 11, 2009
Posts: 446
Location: Gurgaon/DelhiNCR
Status: Offline
|
| Posted: Tue May 24, 2011 1:02 pm Post subject: Re: metal halide - light bill |
|
|
| aquariumer wrote (View Post):
|
|
12600 units/month
|
 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 
| 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  ). 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 |
|
|
| Back to top |
|
|
jerin111111
Regular Poster on IAH
Joined: Mar 31, 2011
Posts: 462
Location: hebbal, Bangalore
Status: Offline
|
| Posted: Tue May 24, 2011 1:09 pm Post subject: Re: metal halide - light bill |
|
|
| heavy calculations |
|
|
| Back to top |
|
|
jack86
Regular Poster on IAH
Joined: Sep 11, 2009
Posts: 446
Location: Gurgaon/DelhiNCR
Status: Offline
|
| Posted: Tue May 24, 2011 1:59 pm Post subject: Re: metal halide - light bill |
|
|
| 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. |
|
|
| Back to top |
|
|
nanomania
Regular Poster on IAH
Joined: May 16, 2011
Posts: 1065
Location: mumbai (south)
Status: Offline
|
| Posted: Tue May 24, 2011 2:36 pm Post subject: Re: metal halide - light bill |
|
|
| here in south-mumbai its 6.5 per unit |
|
|
| Back to top |
|
|
Amazonian2010
Regular Poster on IAH
Joined: Jan 29, 2010
Posts: 725
Location: Mumbai (Chandivali; Andheri East)
Status: Offline
|
| Posted: Tue May 24, 2011 3:44 pm Post subject: Re: metal halide - light bill |
|
|
| |
|
|
| Back to top |
|
|
saikumar
Committed Member of IAH
Joined: Jan 30, 2007
Posts: 2226
Location: HYD-is-good
Status: Offline
|
| Posted: Tue May 24, 2011 6:09 pm Post subject: Re: metal halide - light bill |
|
|
Hey Raj,
Is it lesser in Hyderabad??
More over its a variable slab, if you burn more, the Unit charge is more. |
|
|
| Back to top |
|
|
Amazonian2010
Regular Poster on IAH
Joined: Jan 29, 2010
Posts: 725
Location: Mumbai (Chandivali; Andheri East)
Status: Offline
|
| Posted: Tue May 24, 2011 6:22 pm Post subject: Re: metal halide - light bill |
|
|
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 |
|
|
| Back to top |
|
|
nanomania
Regular Poster on IAH
Joined: May 16, 2011
Posts: 1065
Location: mumbai (south)
Status: Offline
|
| Posted: Tue May 24, 2011 6:42 pm Post subject: Re: metal halide - light bill |
|
|
| mumbai is blody expensive.......... |
|
|
| Back to top |
|
|
|
Guest(s): 1,909
![[News Feed]](images/powered/feed_20_news.png "News Feed"){kind=small}
![[Forums Feed]](images/powered/feed_20_forums.png "Forums Feed"){kind=small}
![[Downloads Feed]](images/powered/feed_20_down.png "Downloads Feed"){kind=small}
![[Web Links Feed]](images/powered/feed_20_links.png "Web Links Feed"){kind=small}
![[Validate robots.txt]](images/powered/valid-robots.png "Validate robots.txt"){kind=small}