Kilowatt Hours Instead of Kilowatts?

kilowatt hour

All kinds of watts

watts your point?

Kilowatt is unit of Power. Kilowatt-hour is a unit of Energy. Power X Time = Energy.

Google is an excellent search engine, please click on this link and read :

kwh vs kw

Actually many places bill power usage in both the power measurement of kilowatts and the energy measurement of kilowatt hours, and for good reasons. Some industries can require an enormous amount of power for very brief periods of time. These industries will be most concerned with their peak power usage to lower their costs. The utility powering these users will have to provide the infrastructure that is capable of providing this peak usage to this customer so the utility will want to scale the bill to this user's brief power peaks. Also most customers will draw a peak demand close to the range of a nominal peak demand but may or may not continuously draw this demand level throughout each day. These customers will be billed and be more concerened of the total energy used per day than their total peak usage.

I hope that helped.

Kilowatt is the unit of power to get the work done or in other words to get the machinery running. That means how much power you required to run the load or the machinery.

For energy consumption where you need to calculate the total power consumption of your machinery, your unit of power need to be multiply by the factor of time.

For example, If you run a 100 KW motor for 1 hr that means that the power consumption will be 100KW/Hr (kilowatthour). Of course if you run the motor for a day or for a month then you have to multiply it with 24hr x 30 days for a month.

What ever the answer you get, that will be your power consumption for the month. Then you have to pay the electricity bill. That how the electricity bill is calculated.

kilowatt is power and kilowatt hour is stamina

u have good power u can move a

but move but can u keep moving it for an hour at some specific rate dats wat desired.. from the power

hense killowat hour.. how many hours... u used that much of kilowatt

I suggest you to measure only kilowatt- but the word "usage"- that you have to understand the meaning of that. Then you will have your own answer.

1kWh = 3.6 megajoules. Does that help?

Furhter on the subject:

If you use 1 watt power for one second time duration then we say you have used one watt-second (one joule) energy.

Usage is defined by the size of a load and the amount of time it runs. The size of an electrical load is the amount of power it uses at a given moment.

The amount of electricity used by any appliance or light depends on its power in watts and on the amount of time it operates. Our overall consumption or usage is measured in kWh at the electric meter, which equals power.
One kWh is the energy supplied when an appliance whose power is 1kW is used for 1 hour. energy supplied = power x time.

For instance, an equipment that uses 1200 watts and runs for 15 minutes each day uses 1.2kW x 0.25 hr = 0.3 kWh per day.

If we were to measure electricity usage in kW only, then a utility would charge me differently for using 1kW for 1000 days compared to the industrial plant down the road using 1,000kW for 1 day, where in reality they are the same amount of energy.

Your question is kind of like asking "why don't we measure gasoline consumption in liters instead of kM per liter". If I have a VW Golf using 1L of fuel to go to the store and back, and I put that same 1L of fuel into a Bugatti to go to the same store, I will get stuck before I even arrive, let alone come back! if I know the consumption rate of the vehicle, I would know that it will take more fuel to drive the Bugatti than the VW Golf (or that I need to live closer to the store).

for the same reason we buy milk by the gallon and not by the level on the bottle.

If you were paid $25 per hour, and you worked an 8 hour day and the guy paid you for an hour would you be properly paid?

Try to differentiate between Power and Energy: http://www.4shared.com/file/_zv3zVM0/Convert.html

Kilowatt-hours is the quantity of power used.

Kilowatts is the rate at which the power is used.

I would much perer to pay by the Mega Watt, this way my bill would be more inferquient but I would probally have to sell my house, if the bill came at all!

Honestly kilowatt hours is the real way to measure energy used, when metering the energy usage, calculation of energy used is done on a real time basis IE: Kilowatts per hour, but i understand what you are trying to say.

Why not just say you have used 55 kW

Instead of saying 55 kWH

Good question, But time real time has to be included in the equation to calculate total energy usage, weather it be hours, minutes or seconds. Hours seemed to be the pefered standard of measurement. So hence KWH.

Who was Kilowatt anyway?

Cheers

Joe

Time is a direct function of any form of measurement. Water flow rate is measured in m³/h to enable us know the volume of water expected at a given time.

For obvious reasons base on Pick and Off Pick periods - that is to your benefit -and for time as a function of measurement, KWh is the best standard vector unit of measuring electric power consumption.

If for any reason KW is used, the Pick and Off Pick period will not be considered and the charge will be relatively high.

Dickson.

its measured in both and needs to be.

Peak demand is measured in watts or kilowatts and is measuring power We don't overload wires or create surges to large for our equipment. Momentary measurement.

Consumption is measured in kWh and is a measurement of energy. Billing!!!

Rate multiplied by time.

1 Watt = 1 joule/second, it is like the rate at which the energy is deliver. So if you multiplied it by the time during which the rate of energy is deliver, you obtain the total amount of energy.

For example : 1kW (1000 J/s) during 1h (3600s) = 1kWh = 3 600 000 J

Kilowatts represents the amount of power available at a given point in time...Kilowatt hours is the amount of power consumed over a given frame of time. That's what your meter registers and you pay for plus the other myriad of additional charges. At least that's how I understand it.

you can't register the consumption due to variant nature of this quantity. Registeration of this quantity is possible if TIME factor is added.

It is a simple question but it is also a good one. In a previous life, we measured efficiency of our facility compressors in what my boss called "kW/MSCF" and told me the number would be between one and ten. I did the math to get to kW/MSCF and it did not get me in the ballpark of that number. It was only when I realized that we really were interested in our energy usage, not the power, that I was able to derive the correct answer.

It is fairly typical for people to leave off the "hours" nomenclature when discussing energy use and thus is misleading.

By analogy, when driving a car, kilowatts are like speed and kilowatt-hours are like distance travelled.

Kilowatts-hours are the total energy consumed, and kilowatts are power, which is how fast you consume that energy (how fast at which the distance travelled increases).

To travel a given distance faster, you need a faster and more expensive car. It's the same for increasing power ... the faster you want/need to consume your energy (to travel faster, or to climb hills with your car), the more powerful and more expensive your equipment has to be. These are capital costs of cars / equipment.

As concerns operating costs, they're like gasoline in a car's tank; the further you drive, the more you use up. (For simplicity's sake, let's assume that consumption doesn't change with car speed). Also, operating costs may depend on how fast the car is driven; if a car moves faster than a given speed limit, the driver gets a speeding ticket that costs him a certain amount for every kilometre-per-hour that he exceeds that speed with. That corresponds to when utilities charge for consuming energy too fast (i.e, too many kilowatt-hours per hour, that is kilowatts, at a given time).

Cheers!
DZ

This is actually a pretty good layman's question. Another analogy which may help:

• Kilowatt is a rate of transfer. For water, the similar parameter would be liters/minute.
• Kilowatt-hour is a quantity. For water, the similar parameter would be total liters used.
• Your water company bill is determined by the total quantity of water you have used, not by how fast it comes out of the tap.
• Residential electricity is also billed by the total energy used (kilowatt-hours), not by how fast you pull it off the grid (kilowatts).

Because kW and kWh are different things.

When you go to a restaurant you don't pay the bill for how big is your mouth or your stomach, you pay for how much food you've consumed.

Let's say I have 1 computer (100W), 2 TVs (100W each), 1 radio (20W), 5 light bulbs (60W each),.....etc. and everything is about 1kW. But, literally, I watch TV all day long so I will have to pay only for 100W*24h = 2.4kWh. That's how much electricity I've consumed.