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Micheal darsent
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Calculation of Tariff for Electric Power

11/30/2011 12:36 PM

An industrial electricity tariff is £8.00 per KVA of maximum demand per year plus £0.06 per unit used. The plant in a factory has a maximum demand of 6000 KVA when operating

at a power factor of 0.85. Power is used for 24 hours a day for 300 days per year. The load factor for the factory is 50%. Based on the above tariff calculate the annual cost for:

i) Maximum demand.

ii) Units used.
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SolarEagle
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#1

Re: Calculation of Tariff for Electric Power

11/30/2011 1:13 PM

No homework questions....you must learn this, it's easy...

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lyn
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#2

Re: Calculation of Tariff for Electric Power

11/30/2011 2:17 PM

You could, at least, be creative enough to put the obvious textbook question into a form that would disguise it.
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Micheal darsent
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#3
In reply to #2

Re: Calculation of Tariff for Electric Power

11/30/2011 2:25 PM

Its just that my tutor and I have different results to the calculations, I was just trying to be direct. Sorry.
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SolarEagle
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#4
In reply to #3

Re: Calculation of Tariff for Electric Power

11/30/2011 2:33 PM

Then give both answers...

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Mikerho
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#5
In reply to #3

Re: Calculation of Tariff for Electric Power

11/30/2011 2:47 PM

And show your work so we can see how you arrived at them. Seriously.

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Micheal darsent
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#9
In reply to #5

Re: Calculation of Tariff for Electric Power

11/30/2011 5:06 PM

An industrial electricity tariff is £8.00 per KVA of maximum demand per year plus £0.06 per unit used. The plant in a factory has a maximum demand of 6000 KVA when operating

at a power factor of 0.85. Power is used for 24 hours a day for 300 days per year. The load factor for the factory is 50%. Based on the above tariff calculate the annual cost for:

i) Maximum demand.

ii) Units used.

Tariff= £8.00 per KVA of Max. Demand per year plus £0.06 per unit used. Max. Demand = 6000 KVA @ 0.85 power factor. Load factor= 50%. power usage= 24hours, 300 days.

Annual Cost of Max. Demand = 6000 x 8.00 = £48,000.00

Units used = P x Pf x Load Factor i.e 6000 x0.85 x 0.5 x24 x 300 = 18360000 units

Annual Cost of units used = 18360000 x 0.06 = £1101600.00

OR

Max. Demand = 6000 x 0.85 x 0.5 =2550

Cost for max.Demand = 2250 x £800.00 = 18000.00

Unit used = Units used = P x Pf x Load Factor i.e 6000 x0.85 x 0.5 x24 x 300 = 18360000 units

Annual Cost of units used = 18360000 x 0.06 = £1101600.00
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standarded
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#17
In reply to #9

Re: Calculation of Tariff for Electric Power

11/30/2011 10:42 PM

Micheal, thank you for being honest and posting your work. Most people who post homework queries gripe and b(&%# when questioned about posting homework.

Keep this approach up and you'll find a warmer welcome here.

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Doorman
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#6
In reply to #3

Re: Calculation of Tariff for Electric Power

11/30/2011 2:52 PM

Just think of the glow of satisfaction you will have when, after showing your work here and receiving some help to understand the solution, you advise your tutor he is wrong and can clearly demonstrate where his error is.

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Micheal darsent
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#8
In reply to #6

Re: Calculation of Tariff for Electric Power

11/30/2011 5:04 PM

Tariff= £8.00 per KVA of Max. Demand per year plus £0.06 per unit used. Max. Demand = 6000 KVA @ 0.85 power factor. Load factor= 50%. power usage= 24hours, 300 days.

Annual Cost of Max. Demand = 6000 x 8.00 = £48,000.00

Units used = P x Pf x Load Factor i.e 6000 x0.85 x 0.5 x24 x 300 = 18360000 units

Annual Cost of units used = 18360000 x 0.06 = £1101600.00

OR

Max. Demand = 6000 x 0.85 x 0.5 =2550

Cost for max.Demand = 2250 x £800.00 = 18000.00

Unit used = Units used = P x Pf x Load Factor i.e 6000 x0.85 x 0.5 x24 x 300 = 18360000 units

Annual Cost of units used = 18360000 x 0.06 = £1101600.00
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Doorman
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#10
In reply to #8

Re: Calculation of Tariff for Electric Power

11/30/2011 5:17 PM

"Cost for max.Demand = 2250 x £800.00 = 18000.00"

Check your entry values and your math.

Where does the 800 pounds come from?

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kramarat
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#11
In reply to #10

Re: Calculation of Tariff for Electric Power

11/30/2011 5:58 PM

Hey, at least he's using pounds. If he was dealing with the Euro the answer would change daily.

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lyn
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#12
In reply to #11

Re: Calculation of Tariff for Electric Power

11/30/2011 6:21 PM

He also came back and showed us his work. For which I gave him GA's.
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kramarat
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#14
In reply to #12

Re: Calculation of Tariff for Electric Power

11/30/2011 7:03 PM

I can see people trying to cheat their way into some fields.......................seems like only a complete idiot would try to cheat their way into engineering. Even if they got away with it, a few questions on their new job, that they don't know the answer to, will bust them.

I could probably convince people that I have a degree in lesbian studies.

I don't know who would hire me though..............................maybe I could be a teacher.

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SolarEagle
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#13
In reply to #8

Re: Calculation of Tariff for Electric Power

11/30/2011 6:29 PM

Here's an interesting article you might read...

http://ecmweb.com/ops/electric_basics_power_factor/

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wareagle
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#7

Re: Calculation of Tariff for Electric Power

11/30/2011 3:55 PM

Michael

You work out the problem and we will make comments and assist you but we won't do it for you. It is an interesting question. Also you may want to calculate the required KVAR required to improve the PF to 0.95 and save a bunch of money. My computer does not have a £ key.
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Sapper
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#15
In reply to #7

Re: Calculation of Tariff for Electric Power

11/30/2011 7:52 PM

But does it have an <Any Key>??

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SolarEagle
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#18
In reply to #15

Re: Calculation of Tariff for Electric Power

12/01/2011 2:31 PM

I'll sell mine cheap...don't use anymore...

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SolarEagle
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#16
In reply to #7

Re: Calculation of Tariff for Electric Power

11/30/2011 8:42 PM

£ It's alt0163 in windows...option+3 on mac..

http://www.nouilles.info/keyboard_shortcuts.html

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Users who posted comments:

Doorman (2); kramarat (2); lyn (2); Micheal darsent (3); Mikerho (1); Sapper (1); SolarEagle (5); standarded (1); wareagle (1)

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