__NOTOC__ The Holyrood Thermal Electric Generating Station built by

Newfoundland and Labrador Hydro Newfoundland and Labrador Hydro (NL Hydro), commonly known as Hydro, is a provincial Crown corporation that generates and delivers electricity for Newfoundland and Labrador, as well as portions of Quebec and the north-eastern areas of the United ...

Corporation is located near the community of Holyrood, in

Conception Bay Conception Bay (CB) is a bay on the southeast coast of Newfoundland, Canada. The population (in 2011) of people living in municipalities (or unincorporated census subdivisions) located along the coast of Conception Bay was 90,490 making it on ...

Newfoundland Newfoundland and Labrador (; french: Terre-Neuve-et-Labrador; frequently abbreviated as NL) is the easternmost province of Canada, in the country's Atlantic region. The province comprises the island of Newfoundland and the continental region ...

Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...

Overview

The initial installation included two 150

megawatt The watt (symbol: W) is the unit of Power (physics), power or radiant flux in the International System of Units, International System of Units (SI), equal to 1 joule per second or 1 kg⋅m2⋅s−3. It is used to quantification (science), ...

(MW)

turbine generator In electricity generation, a generator is a device that converts motive power (mechanical energy) or fuel-based power (chemical energy) into electric power for use in an external circuit. Sources of mechanical energy include steam turbines, gas ...

s which are propelled by steam heated by two large oil burning

furnaces A furnace is a structure in which heat is produced with the help of combustion. Furnace may also refer to: Appliances Buildings * Furnace (central heating): a furnace , or a heater or boiler , used to generate heat for buildings * Boiler, used t ...

. The Number 6 fuel oil used in the plant to keep the furnaces going is delivered by shuttle tankers to the marine terminal constructed as part of the project. Newfoundland and Labrador Hydro's Holyrood Thermal Generating Station burns No. 6 heavy

fuel oil Fuel oil is any of various fractions obtained from the distillation of petroleum (crude oil). Such oils include distillates (the lighter fractions) and residues (the heavier fractions). Fuel oils include heavy fuel oil, marine fuel oil (MFO), bun ...

at the rate of approximately per day, per unit at full load to produce steam at 1000 degrees Fahrenheit (540 degrees Celsius) and 13,790

kPa KPA may refer to: * Keele Postgraduate Association, Keele University, UK, formerly Keele Research Association (KRA) * Kensington (Olympia) station, London, England, National Rail station code * Kenya Ports Authority * ''Kiln phosphoric acid'', a ...

at a rate of over 500 megagrams per hour. In an average year it puts out pollution equivalent to 300,000 cars on the road. In a

thermal generating station A thermal power station is a type of power station in which heat energy is converted to electrical energy. In a steam-generating cycle heat is used to boil water in a large pressure vessel to produce high-pressure steam, which drives a s ...

, fuel is burned in a boiler to convert water to steam. The high-pressure steam is directed into a

turbine A turbine ( or ) (from the Greek , ''tyrbē'', or Latin ''turbo'', meaning vortex) is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work. The work produced by a turbine can be used for generating e ...

that is connected to an

electrical generator In electricity generation, a generator is a device that converts motive power (mechanical energy) or fuel-based power (chemical energy) into electric power for use in an external circuit. Sources of mechanical energy include steam turbines, gas ...

that produces electricity as it turns. A seawater condenser is used for cooling the spent steam from the turbine, converting it back to water that is reused in the boiler. Holyrood uses over 250,000 litres per minute of sea water for cooling on each unit and 900,000 litres per day of fresh water for make up purpose. The plant generators operate at 16,000

volt The volt (symbol: V) is the unit of electric potential, electric potential difference (voltage), and electromotive force in the International System of Units (SI). It is named after the Italian physicist Alessandro Volta (1745–1827). Defi ...

s and 7000

ampere The ampere (, ; symbol: A), often shortened to amp,SI supports only the use of symbols and deprecates the use of abbreviations for units. is the unit of electric current in the International System of Units (SI). One ampere is equal to elect ...

s transformed up to 230,000 volts for transmission on the island grid to all parts of the system. It generates on average 15 to 25% of Newfoundland’s electricity—up to 30% of the island’s electricity needs at peak in the winter months. The plant has three smokestacks, one 360 ft (109.8 m) tall and two 300 ft (91.5 m) tall. These are the tallest freestanding structures built on land in Newfoundland.

History

Holyrood was placed in service in 1971 with two 150 MW units. A third 150 MW unit was added in 1980 to increase the output to 450 MW. In 1988/89 the original two units were modified to increase the plant capacity to 490 MW. In 2014, a 123.5 MW

diesel Diesel may refer to: * Diesel engine, an internal combustion engine where ignition is caused by compression * Diesel fuel, a liquid fuel used in diesel engines * Diesel locomotive, a railway locomotive in which the prime mover is a diesel engin ...

combustion turbine A gas turbine, also called a combustion turbine, is a type of continuous flow internal combustion engine. The main parts common to all gas turbine engines form the power-producing part (known as the gas generator or core) and are, in the directio ...

was installed.

References

{{Reflist Oil-fired power stations in Newfoundland and Labrador Newfoundland and Labrador Hydro

Overview

History

See also

References