![]() ![]() If a kWh figure covers a week, we can only fairly compare it with other kWh figures that cover a week. If a kWh figure covers a day, we can only compare it fairly with other kWh figures that cover a day. However, we can’t immediately compare the efficiency of the building over each of those periods. Given the three figures above, we can easily see that the building used more energy over the course of 2009 than it did on February 16th 2010. From January 1st 2009 to December 31st 2009 it might have used 31,250 kWh.Over the week starting April 12th 2010 it might have used 550 kWh.On February 16th 2010 a building might have used 95 kWh.The relationship between energy consumption (kWh) and timeĪ typical building uses more energy over long periods of time than it does over short periods of time: KWh is a measure of energy, whilst kW is a measure of power…Įlectricity and other fuels supply energy in a form that we can use to run the equipment in our buildings. Though it only seems simple after you understand it. Well, the difference is really very simple. What is the difference between a kW and a kWh? The kilowatt (kW) measures only power, kilowatt hour (kWh). ![]() KWh: The term kilowatt hour is a term of consumption and is defined to see the power used over a period of time, in this case one hour. Resistive devices or loads such as heaters, incandescent lamps are rated in KW. One watt is one joule (energy) per second (1 W = 1 J/s). Power in watts is the rate at which energy is consumed (or generated). The real power in watts is the power that performs work or generates heat. It is the power that actually powers the equipment and performs useful work. KW: is Working Power (also called Actual Power or Active Power or Real Power). Example, if you have a TV that consumes 0.250kw and uses 4 hours, you should multiply 0.250kw by 4, the result will be: 1kwh (0.250kwx4 = 1kwh) ![]()
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