As a matter of course, capacity factors of such natural energy-based power generation including wind power, will be determined by natural conditions.įukushima Daiichi nuclear plant rated at capacity 4.7 million kW in total and the calculated annual power generation capacity is 35 billion kWh at 85% capacity factor. In case of Japan, the annual average capacity factor of solar panel is small, about 12% in track record. Rooftop solar panels with 4kW rated capacity, for example, output 4kW only when it is exceptionally sunny at daytime and the output will be zero at night. However, the renewable power generation does not fit this principle. (Before The Great East Japan Earthquake, capacity factor of Japanese nuclear power plants is around 60 to 70%, which is significantly low compared to 85% of the world average.)īased on the principle of economic operation in power generation in terms of fuel cost, nuclear and coal power plants operate continuously (high capacity factor), on the other hand oil power plants whose fuel cost is expensive operate only at the peak of power demand. In other words, the capacity factor indicates the value of how much the equipment of each power plant is utilized. Therefore, the capacity factor of a power plant is the ratio of its actual annual output (numerator), to its calculated annual output presuming it operates throughout the year at is rated capacity (denominator). In fact, however, power plants never operate without cease because they periodically shut down for inspection. When a nuclear power with 1 million kW rated capacity (installed capacity) is operated throughout one year (8,760 hours), the amount of annual power generation is 8760 million kWh, which means the annual capacity factor is 100 percent. Here we estimate a value of power generation in kWh Refer to Residential and commercial sector in 'Is energy used economically?' *Using the value of viewing time 4.5 hours and standby time 19.5 hours per day, power consumption of viewing is estimated from annual power consumption. Refer to Residential and commercial sector in 'Is energy used efficiently?' It will also help you to understand how much energy you can save in your home, by turning things off, or switching to a lower energy alternative.*Assumed the annual lighting time 2000 hours and daily lighting time 5.5 hours. It will help you to understand how your bill works.
Understanding Kilowatt Hours will help you to understand how much energy you are using in your home. The value of understanding Kilowatt Hours
Multiplied by 17 pence, these lights are costing £4.76 to run. This would mean that the lights are consuming 28 Kilowatt Hours in a single month.
This would equal 35 hours a week and 140 hours a month. Let’s say that you have your living room lights on for 5 hours a day. Our Kilowatt Hour rate is still 17 pence, which means for every hour your lights are on they cost 3.4 pence. Remember that a Kilowatt is a thousand watts, and so two hundred watts used for one hour would be 0.2 Kilowatt Hours. In your living room you may have two 100 watt light bulbs in the ceiling. If you just put 17 into your calculator, then you would get 340. In this case 0.17, as it is 0.17 of a pound, or a 100. When calculating using pence, you should put a decimal point in front of the number.
#Kwh to watts portable
This would equal £3.40 of energy used per month to power your portable heater. You have therefore used 20 kWhs of electricity that month, which you multiply by 17 pence. Let’s say that you have your portable heater on for five hours a week, that means your heater is on for 20 hours per month. That means running the portable heater for one hour costs 17 pence. Let’s say your energy rate (found on your energy bill) is 17 pence per Kilowatt Hour. If you run that portable heater for 1 hour, then you have consumed 1 Kilowatt Hour. You have a portable heater that is rated at 1 Kilowatt. Confused? Let’s look at some real world examples FOCUS ON… portable heater To understand how much energy you have used, you simply multiply the Kilowatts by the number of hours in use. If you use an electrical item for one hour, then you will have used some form of Kilowatt Hour.
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