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26-510: Specifically, the proposal includes a ferry from the Kollsnes area of Øygarden to somewhere south of the island of Herdla in Askøy, a subsea road tunnel from the same area on the island of Holsnøy , and road across the island and then a new subsea section across to Radøy . Although not in any public proposals, there have been private proposals to develop Mjølkevikvarden in Askøy as a site for

52-428: A battery is usually expressed indirectly by its capacity in ampere-hours ; to convert ampere-hour (Ah) to watt-hours (Wh), the ampere-hour value must be multiplied by the voltage of the power source. This value is approximate, since the battery voltage is not constant during its discharge, and because higher discharge rates reduce the total amount of energy that the battery can provide. In the case of devices that output

78-461: A capacity of 143,000,000 cubic metres (3.8 × 10  US gal) of natural gas per day. At Kollsnes, the Natural gas liquids (NGL) are separated out of the gas. The dry gas is compressed and then shoved by large compressors out in the pipe systems that transport it to the customers. In 1999, it was decided that the gas from Kvitebjørn was to be landed at Kollsnes. The consistency of the gas from

104-401: A change over time. For example: miles per hour, kilometres per hour, dollars per hour. Power units, such as kW, already measure the rate of energy per unit time (kW= kJ / s ). Kilowatt-hours are a product of power and time, not a rate of change of power with time. Watts per hour (W/h) is a unit of a change of power per hour, i.e. an acceleration in the delivery of energy. It is used to measure

130-442: A different voltage than the battery, it is the battery voltage (typically 3.7 V for Li-ion ) that must be used to calculate rather than the device output (for example, usually 5.0 V for USB portable chargers). This results in a 500 mA USB device running for about 3.7 hours on a 2,500 mAh battery, not five hours. The Board of Trade unit (B.T.U.) is an obsolete UK synonym for kilowatt-hour. The term derives from

156-502: A new port for Bergen . This would only be possible if the Cross Link was built. Mongstad is one of several proposed locations for the new port, and the Cross Link would make it a more central location. The Cross Link would allow a small amount of traffic to bypass the main road system in central Bergen and would allow much faster transport between two large industrial sites, Kollsnes and Mongstad. A toll company has been established by

182-454: A unit in the left column to the units in the top row, multiply by the factor in the cell where the row and column intersect. All the SI prefixes are commonly applied to the watt-hour: a kilowatt-hour is 1,000 Wh (kWh); a megawatt-hour is 1 million Wh (MWh); a milliwatt-hour is 1/1,000 Wh (mWh) and so on. The kilowatt-hour is commonly used by electrical energy providers for purposes of billing, since

208-485: A yearly basis, in units such as megawatt-hours per year (MWh/yr) gigawatt-hours/year (GWh/yr) or terawatt-hours per year (TWh/yr). These units have dimensions of energy divided by time and thus are units of power. They can be converted to SI power units by dividing by the number of hours in a year, about 8760 h/yr . Thus, 1 GWh/yr = 1 GWh/8760 h ≈ 114.12 kW . Many compound units for various kinds of rates explicitly mention units of time to indicate

234-578: Is a non-SI unit of energy equal to 3.6 megajoules (MJ) in SI units, which is the energy delivered by one kilowatt of power for one hour . Kilowatt-hours are a common billing unit for electrical energy supplied by electric utilities . Metric prefixes are used for multiples and submultiples of the basic unit, the watt-hour (3.6 kJ). The kilowatt-hour is a composite unit of energy equal to one kilowatt (kW) sustained for (multiplied by) one hour. The International System of Units (SI) unit of energy meanwhile

260-545: Is a stub . You can help Misplaced Pages by expanding it . This Vestland location article is a stub . You can help Misplaced Pages by expanding it . Kollsnes Kollsnes is a natural gas processing plant operated by Equinor on the southern part of the island of Oøy in Øygarden Municipality in Vestland county, Norway . It processes the natural gas from the Troll , Kvitebjørn , and Visund gas fields. Kollsnes has

286-536: Is calculated by multiplying the device's power consumption in kilowatts by the operating time in hours, and by the price per kilowatt-hour. The unit price of electricity charged by utility companies may depend on the customer's consumption profile over time. Prices vary considerably by locality. In the United States prices in different states can vary by a factor of three. While smaller customer loads are usually billed only for energy, transmission services, and

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312-450: Is measured in watts , or joules per second . For example, a battery stores energy. When the battery delivers its energy, it does so at a certain power, that is, the rate of delivery of the energy. The higher the power, the quicker the battery's stored energy is delivered. A higher power output will cause the battery's stored energy to be depleted in a shorter time period. Electric energy production and consumption are sometimes reported on

338-445: Is often expressed as terawatt-hours (TWh) for a given period that is often a calendar year or financial 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. Conversely, one terawatt-hour is equal to a sustained power of about 114 megawatts for a period of one year. In 2020, the average household in the United States consumed 893 kWh per month. Raising

364-474: Is the joule (symbol J). Because a watt is by definition one joule per second , and because there are 3,600 seconds in an hour, one kWh equals 3,600  kilojoules or 3.6 MJ. A widely used representation of the kilowatt-hour is kWh , derived from its component units, kilowatt and hour. It is commonly used in billing for delivered energy to consumers by electric utility companies, and in commercial, educational, and scientific publications, and in

390-467: Is used with loads or output that vary during the year but whose annual totals are similar from one year to the next. For example, it is useful to compare the energy efficiency of household appliances whose power consumption varies with time or the season of the year. Another use is to measure the energy produced by a distributed power source. One kilowatt-hour per year equals about 114.08 milliwatts applied constantly during one year. The energy content of

416-616: The Czech Republic with gas. The pipes are owned by Gassled , operated by Gassco while the technical responsibility is handled by Equinor. In 2009, the electric power consumption of the plant was 2,000 gigawatt-hours (7,200  TJ ) per year. This had increased from 1,000 gigawatt-hours (3,600 TJ) per year in 1996. 60°32′55″N 4°50′14″E  /  60.5486°N 4.8371°E  / 60.5486; 4.8371 Kilowatt-hour A kilowatt-hour ( unit symbol : kW⋅h or kW h ; commonly written as kWh )

442-571: The Vestprosess gas pipeline, the plant at Kollsnes is linked to the plants at Mongstad , where the NGL from Kollsnes is fractioned into propane , butane , and naphtha . The gas from Kollsnes is transported through the four pipe systems Statpipe , Zeepipe , Europipe I , and Franpipe to continental Europe and supplies Austria , Belgium , France , Germany , the Netherlands , Spain , and

468-433: The annual electricity generation for whole countries and the world energy consumption . A kilowatt is a unit of power (rate of flow of energy per unit of time). A kilowatt-hour is a unit of energy. Kilowatt per hour would be a rate of change of power flow with time. Work is the amount of energy transferred to a system; power is the rate of delivery of energy. Energy is measured in joules , or watt-seconds . Power

494-415: The SI. An electric heater consuming 1,000 watts (1 kilowatt) operating for one hour uses one kilowatt-hour of energy. A television consuming 100 watts operating continuously for 10 hours uses one kilowatt-hour. A 40-watt electric appliance operating continuously for 25 hours uses one kilowatt-hour. Electrical energy is typically sold to consumers in kilowatt-hours. The cost of running an electrical device

520-558: The daily variation of demand (e.g. the slope of the duck curve ), or ramp-up behavior of power plants . For example, a power plant that reaches a power output of 1 MW from 0 MW in 15 minutes has a ramp-up rate of 4 MW/h . Other uses of terms such as watts per hour are likely to be errors. Several other units related to kilowatt-hour are commonly used to indicate power or energy capacity or use in specific application areas. Average annual energy production or consumption can be expressed in kilowatt-hours per year. This

546-487: The field made it well suited to be reprocessed to upgraded products. The new plant that was built cost 3 billion  kr , with operations starting on 1 October 2004. Starting in October 2005, the gas from Visund is also landed at Kollsnes. With a capacity of 25,000,000 cubic metres (6.6 × 10  US gal) gas per day and large flexibility, the new NGL plant can process gas from new fields that would be built. Though

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572-490: The involved municipalities, although politicians from Nordhordland have stated that their top priority is to build the Nyborg Tunnel , which will reduce travel time towards Bergen, and a road package which involves upgrading part of the county road network in the area. 60°35′27″N 5°02′50″E  /  60.59083°N 5.04722°E  / 60.59083; 5.04722 This Norwegian tunnel-related article

598-544: The media. It is also the usual unit representation in electrical power engineering. This common representation, however, does not comply with the style guide of the International System of Units (SI). Other representations of the unit may be encountered: 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

624-403: The monthly energy consumption of a typical residential customer ranges from a few hundred to a few thousand kilowatt-hours. Megawatt-hours (MWh), gigawatt-hours (GWh), and terawatt-hours (TWh) are often used for metering larger amounts of electrical energy to industrial customers and in power generation. The terawatt-hour and petawatt-hour (PWh) units are large enough to conveniently express

650-423: The rated capacity, larger consumers also pay for peak power consumption, the greatest power recorded in a fairly short time, such as 15 minutes. This compensates the power company for maintaining the infrastructure needed to provide peak power. These charges are billed as demand changes. Industrial users may also have extra charges according to the power factor of their load. Major energy production or consumption

676-403: The temperature of 1 litre of water from room temperature to the boiling point with an electric kettle takes about 0.1 kWh. A 12 watt LED lamp lit constantly uses about 0.3 kW⋅h per 24 hours and about 9 kWh per month. 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. To convert a quantity measured in

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