A simple law of physics explains why natural gas power stations are unreliable:
6 gigajoules of natural gas are needed to generate 3.6 gigajoules of electrical energy in a combined-cycle gas turbine power station.
Each 3.6 gigajoules of electrical energy (which is 1 megawatt-hour or 1 MWh) has a price of about $50 in the Australian Energy Market Organisation's National Electricity Market.
The natural gas used to generate this electrical energy costs about $9 per gigajoule in the Australian Energy Market Organisation's Wholesale Gas Market.
It costs about $54 for the natural gas used as fuel to generate each megawatt-hour of electricity. This has a wholesale price of only $50.
Renewables helped keep Sa powered while a fire knocked out the switching of gas generators at Torrens island. We are asked to reduce use— Leon Byner (@LeonByner5AA) March 3, 2017
Gas-fired power fails to supply South Australia electricity.— Askgerbil Now (@Askgerbil) March 4, 2017
Wind power keeps SA lights on. https://t.co/eGvQzgfSUj via @ABCNews #saparli
|Natural Gas price in the U.S. - 1 million BTUs = 1.055 gigajoules|
The projected US exports of around 7 trillion cubic feet of natural gas, or about 140 million tonnes of LNG is almost double the projected Australian exports of 85 million tonnes of LNG per year.Liquefied natural gas #exports expected to drive growth in U.S. natural gas trade https://t.co/voUoq8kGCv #natgas #LNG #energytrade pic.twitter.com/Qt2qBvo1OC— EIA (@EIAgov) February 22, 2017
1 metric ton liquefied natural gas (LNG) = 48,700 cubic feet of natural gas.
1 trillion cubic feet of natural gas is about 20 million tonnes of LNG.
Given the much higher cost of producing coal seam gas in Australia, the ramping up of US LNG exports to 2020 is likely to bring the enthusiastic expansion of coal seam gas in Australia to a sudden end.
U.S. liquefaction capacity continues to expand https://t.co/fzDmgOPdQw #LNG #natgas #energytrade pic.twitter.com/uaOb1CNnNf— EIA (@EIAgov) March 3, 2017
@abcnews24 No State Govt has 'gone rogue'. The LNP just doesn't get need for energy policy. Qld has added a gas reservation policy. #auspol pic.twitter.com/4u1jNMlXBZ— Askgerbil Now (@Askgerbil) March 15, 2017