33 KWh?

[Pizza]

33 kWh. That's 33 kilowatt-hours. 33 kWh costs you $3.63 plus tax here in Cumming, Georgia right now. (Electricity costs 11 cents per kWh here, it costs 8 to 34 cents across the USA.) Does anyone know what the significance of 33 kWh is?

(jasonc - You are not allowed to answer if you have seen my Facebook post.)

 

[jasonc]

33 kWh. That's 33 kilowatt-hours. 33 kWh costs you $3.63 plus tax here in Cumming, Georgia right now. (Electricity costs 11 cents per kWh here, it costs 8 to 34 cents across the USA.) Does anyone know what the significance of 33 kWh is?

(jasonc - You are not allowed to answer if you have seen my Facebook post.)

I posted there.

 

[Pizza]

If anyone really does ask, you can tell them, after you give 'em a day or so to guess - I'll be out for several days - gonna be a LONG week at work this week.

 

[jasonc]

If anyone really does ask, you can tell them, after you give 'em a day or so to guess - I'll be out for several days - gonna be a LONG week at work this week.

I had forgotten about that.it applies to certain ones.

 

[KevinK]

Equivalent energy in one gallon of gasoline?

 

[Jim Parker]

Equivalent energy in one gallon of gasoline?

That is correct. (To within about a half kw)

 

[KevinK]

(jasonc - You are not allowed to answer if you have seen my Facebook post.)

What's on your Facebook?

 

[Pizza]

I posted this on Facebook and Jason saw it. Didn't want him to give it away.
But you got it, too bad that the vast majority of readers (here or on FacebooK) have no clue what the significance is of what I posted.

The point here is to illustrate the fallacy of moving our economy to electric cars. It can't be done, not in the foreseeable future, we do not have the generation capacity - and there is no movement to get us there from here. In fact, there is a rather effective concerted effort ongoing to stagnate the growth of electrical generation.

But given your posts here, I suspect you already know this.

 

[jasonc]

I posted this on Facebook and Jason saw it. Didn't want him to give it away.
But you got it, too bad that the vast majority of readers (here or on FacebooK) have no clue what the significance is of what I posted.

The point here is to illustrate the fallacy of moving our economy to electric cars. It can't be done, not in the foreseeable future, we do not have the generation capacity - and there is no movement to get us there from here. In fact, there is a rather effective concerted effort ongoing to stagnate the growth of electrical generation.

But given your posts here, I suspect you already know this.

I know from my work

 

[JohnDB]

Kwh is a DC (voltage) amount of work.

Watts equate to horsepower. (Which can vary by up to 400+/- watts. And that variance is very annoying...which is why most state things in terms of watts or volt/amps.

Batteries are stated in amp-hours because they can only hold so much potential to deliver.
Watts have no time portion of their ratio.
Batteries do.

Gasoline is fuel...it has potential energy not energy itself.
Electricity is energy because it is motion. (Electron flow)
The two don't actually equate.

 

[jasonc]

Kwh is a DC (voltage) amount of work.

Watts equate to horsepower. (Which can vary by up to 400+/- watts. And that variance is very annoying...which is why most state things in terms of watts or volt/amps.

Batteries are stated in amp-hours because they can only hold so much potential to deliver.
Watts have no time portion of their ratio.
Batteries do.

Gasoline is fuel...it has potential energy not energy itself.
Electricity is energy because it is motion. (Electron flow)
The two don't actually equate.

Electric cats operate in DC and well.Meters ,all types are monitoring kwh usage,kw is a demand use it measure a peak use,not the total usage.

 

[Pizza]

Kwh is a DC (voltage) amount of work.

Kwh is a measure used in both DC and AC circuits. One Kwh is equal to 3.6 megajoules, which is the amount of energy converted to work when a kilowatt of energy is delivered for one hour.

Watts equate to horsepower. (Which can vary by up to 400+/- watts. And that variance is very annoying...which is why most state things in terms of watts or volt/amps.

This (the part in bold) is simply not true (see my text above). And you mean volt-amps, not volt/amps. volt/amps is the formula (well, one of them) for calculating resistance in a DC or non-reactive AC circuit.

Volt-amps is a measure of current flow without regard to phase between the two. Once you add the power factor, you now can calculate the real power in the circuit. Obviously, in a DC circuit the volt-amp product and wattage are the same. That is to say, the power factor would be one. So it's:
volts x amps x 1 = power.

Which can be written as: volts x amps = power.

But in an AC circuit where there is ANY reactance (and there is always SOME reactance) the formula becomes:
volts x amps x power factor = power.

The power factor will be a number from 0 (totally reactive circuit with no resistance, impossible but you can get close) to 1 (totally resistive, non-reactive circuit, totally possible if you have no transformers, motors, capacitors or inductors in the circuit).

Batteries are stated in amp-hours because they can only hold so much potential to deliver.
Watts have no time portion of their ratio.
Batteries do.

Watts don't, watt-hours do.

Gasoline is fuel...it has potential energy not energy itself.
Electricity is energy because it is motion. (Electron flow)
The two don't actually equate.

Electricity is not energy, it is matter.

Electricity is a conduit for energy. Like water pressure is a conduit for energy, as the water pressure (energy) does not come from water, but from the source of power that is pressurizing the water.

In the same way,
In an electrical circuit, energy takes a rapid one-way path from source to load. The source is the battery, generator or solar cell - the load is, well, the lamp, motor, TV, etc. that you are powering.

Speaking of motion - The energy actually propagates, essentially, near speed of light. While electricity flows slowly around (and around and around) the circuit; that is to say, the electrons flow around the circuit VERY slowly, at a speed of 2 or 3 feet per HOUR.

No electrons are lost in the process, what was there before is still there now.
But the ENERGY is gone, once you disconnect the power source.