![]() ![]() In terms of human power, a healthy adult male manual laborer performs work equal to about half a kilowatt-hour over an eight-hour day. In 2020, the average household in the United States consumed 893 kWh per month. Conversely, one terawatt-hour is equal to a sustained power of about 114 megawatts for a period of one year. A 365-day year equals 8,760 hours, so over a period of one year, power of one gigawatt equates to 8.76 terawatt-hours of energy. ![]() Major energy production or consumption is often expressed as terawatt-hours (TWh) for a given period that is often a calendar year or financial year. Industrial users may also have extra charges according to the power factor of their load. These charges are billed as demand changes. This compensates the power company for maintaining the infrastructure needed to provide peak power. While smaller customer loads are usually billed only for energy, transmission services, and the rated capacity, larger consumers also pay for peak power consumption, the greatest power recorded in a fairly short time, such as 15 minutes. In the United States prices in different states can vary by a factor of three. The unit price of electricity charged by utility companies may depend on the customer's consumption profile over time. The cost of running an electrical device is calculated by multiplying the device's power consumption in kilowatts by the operating time in hours, and by the price per kilowatt-hour. Electricity sales Įlectrical energy is typically sold to consumers in kilowatt-hours. A 40-watt electric appliance operating continuously for 25 hours uses one kilowatt-hour. A television consuming 100 watts operating continuously for 10 hours uses one kilowatt-hour. Its combination with the kilowatt, a standard SI unit, is therefore permitted within the standard.Īn electric heater consuming 1000 watts (1 kilowatt), and operating for one hour uses one kilowatt-hour of energy. The hour is a unit of time listed among the non-SI units accepted by the International Bureau of Weights and Measures for use with the SI.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |