Umair Gaines
The cost of coal-generated electricity is a complex issue that involves various factors, including capital costs, fuel costs, external costs, and the social impact on human health and the environment. While the price of coal electricity may seem low, the real cost is much higher when considering the negative externalities associated with coal-fired power generation. These external costs, such as environmental damage and adverse health impacts, are estimated to be substantially higher than the price of coal-generated electricity. Additionally, the cost of coal electricity varies depending on factors like the type and rank of coal, mining methods, and geographic region. Furthermore, the levelized cost of electricity (LCOE) for coal is generally higher than that of utility-scale solar power and onshore wind power, making renewable alternatives more economically attractive.
| Characteristics | Values |
|---|---|
| Average cost of coal for electricity generation in the US in 2023 | $47.23 per ton |
| Average delivered price of coal to the US electric power sector in 2022 | $44.51 per short ton |
| Average delivered cost of coal in 2022 including transportation costs | $45.78 per short ton |
| National average transportation cost of coal in 2022 | $18.69 per short ton |
| Fuel cost of coal power plant | $1.85 per kWh |
| Fuel cost of coal power plant with coal price at $120 per metric ton and efficiency at 42% | $0.042 per kWh |
| Levelized cost of electricity (LCOE) of coal | Varies by location |
| Capital costs | High |
| Fuel costs | High |
| Marginal costs | High |
| Maintenance costs | High |
| Operation costs | High |
| Waste storage costs | High |
| Decommissioning costs | High |
| Social costs | High |
| Health costs | High |
| Climate change costs | High |
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What You'll Learn
The cost of coal per metric ton
The cost of coal varies depending on factors such as location, coal type, and grade. For instance, coal prices at surface mines are generally lower than prices at underground mines. In 2022, the average delivered price of coal to the US electric power sector was $44.51 per short ton, which is $49.07 per metric ton. The average cost of coal for the US electric power industry in 2023 was $47.23 per ton, the highest figure during the period under consideration.
The price for one metric ton of thermal coal, used to generate electricity, amounted to an average of $344.90 in 2022, a notable increase from the previous year. This price increase may be influenced by the higher cost of coal from underground mines, which reflects more difficult mining conditions and the need for more miners.
The cost of coal also varies depending on its intended use. For example, in 2022, the average delivered price of coking coal, used in steel production, was about $196 per short ton, approximately 4.4 times higher than the average price of coal for electricity generation.
When considering the cost of coal, it is essential to factor in external costs such as environmental impacts and human health effects. A 1995-2005 EU-funded study, ExternE, estimated that the cost of producing electricity from coal would double if these external costs were included.
In terms of electricity generation, the levelized cost of electricity (LCOE) is a metric used to compare the costs of different methods of electricity generation. While solar and wind power have lower LCOEs than coal in many locations, the LCOE of coal-generated electricity can be influenced by factors such as capital costs, fuel costs, and operational and maintenance expenses.
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The fuel cost of coal power plants
In 2022, the average delivered price of coal to the electric power sector in the United States was $44.51 per short ton, which included both spot and contract purchases. The national average transportation cost was $18.69 per short ton, accounting for about 41% of the average delivered cost. The cost of coal for the electric power industry in the United States amounted to $47.23 per ton in 2023, a five percent increase from the previous year.
The efficiency of coal power plants also plays a role in fuel costs. With a coal price of $120 per metric ton and an efficiency of 42%, the fuel cost of one kilowatt-hour (kWh) produced by coal is 4.2 cents per kWh. However, with the same coal price and an efficiency of 49.07% (the average delivered price of coal in the US in 2022), the fuel cost per kWh decreases to 1.85 cents.
It is worth noting that the levelized cost of electricity (LCOE) for coal-fired power plants is generally higher than that of utility-scale solar power and onshore wind power. LCOE attempts to compare the costs of different methods of electricity generation consistently, taking into account capital costs, operating costs, and fuel costs. However, LCOE calculations can be controversial as they require assumptions about non-financial costs, such as environmental impacts and local availability.
Furthermore, when considering the full cost of coal-generated electricity, there are additional social costs to consider, such as adverse health impacts and climate change-related damages. These external costs, including damage to the environment, human health, and emissions, can significantly increase the overall cost of coal-generated electricity.
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The cost of solar vs coal
Solar energy is increasingly becoming a more economically viable alternative to coal. The cost of solar energy has been declining over the years, and it is now often cheaper to build new solar energy operations than to continue operating existing coal plants. This is due to the falling costs of solar technology, the absence of fuel costs for solar power, and the inclusion of environmental costs in the calculation of energy production costs.
The marginal cost for coal plants is around $36 per megawatt-hour, while new solar power costs approximately $24 per megawatt-hour, making solar power about a third cheaper. Additionally, solar power is often compared favourably to coal when considering the levelized cost of electricity (LCOE), which takes into account the net present value of all costs over the lifetime of the asset and the total energy output. However, it is important to note that LCOE calculations can be controversial as they require assumptions about non-financial costs such as environmental impacts and local availability.
The cost of coal for electricity generation in the United States has been increasing, with the average cost per ton rising to $47.23 in 2023, a five percent increase from the previous year. On the other hand, solar power has become more affordable, with record-low power purchase agreements in countries like the United Arab Emirates and Chile. The cost of solar energy is expected to continue decreasing as technology improves, while coal prices are subject to unpredictable fluctuations due to political and economic factors.
While coal currently provides a more reliable source of energy than solar, the economic advantages of solar power are significant. The transition to solar energy also offers an opportunity to invest in coal communities, providing jobs and economic resilience. However, the shift away from coal towards solar and other renewable energy sources must be carefully managed to ensure grid reliability during the transition.
In conclusion, solar power offers a cost-effective alternative to coal, with the potential to deliver energy at half the cost. The economic benefits of solar power, combined with environmental considerations, make a strong case for accelerating the adoption of solar energy and phasing out coal.
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The environmental and health costs of coal
Coal is an abundant and relatively inexpensive fuel source. However, its production and use have significant environmental and health costs.
Environmental Costs
Coal production and use have a number of negative environmental impacts. Firstly, coal mining operations can significantly alter the landscape. Surface mines, which provided about 63% of the coal mined in the US in 2022, involve removing the soil and rock above coal deposits. This type of mining has changed the face of landscapes like the Appalachian Mountains in West Virginia and Kentucky. Underground mines generally affect the landscape less, but they come with their own risks, such as the collapse of the ground above tunnels and the drainage of acidic water.
Additionally, coal mining operations produce dust and water runoff, which can pollute the surrounding environment if not properly controlled. Coal mining is also a contributor to methane emissions, which can be dangerous if they become concentrated in underground mines. The process of burning coal for energy also has environmental implications. In 2022, coal burning accounted for about 19% of total US energy-related CO2 emissions and 55% of total CO2 emissions from the electric power sector. Coal burning also produces fly ash and bottom ash, which can contain pollutants that, if not properly stored or disposed of, can contaminate groundwater.
Health Costs
The use of coal has significant health impacts, which come with substantial economic costs. In the US, coal use is estimated to result in healthcare costs of between $300 and $800 billion per year, with some studies placing the figure even higher, at up to $880 billion per year. These costs are associated with health issues such as lost work days, hospital visits, disability, prescription drugs, and death. Coal burning releases toxic elements that are linked to cancer, cardiovascular disease, and respiratory diseases. While the Clean Air Act has significantly reduced coal-related deaths in the US, it is estimated that coal use still results in about 15,000 American deaths per year, with much higher numbers in countries like China.
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The cost of coal transportation
The mode of transportation plays a crucial role in determining the cost of coal transportation. While rail transport is the most common method for delivering coal, it is more expensive on a per-tonnage basis compared to truck or river barge transport. River barge transport is often the most cost-effective method for transporting large quantities of coal over long distances, but it is limited to power plants located on suitable rivers. Truck transport, on the other hand, is only cost-effective for short-haul distances, as most coal mines are located far from power plants and consumers.
In recent years, there has been a decline in coal shipments, with a 6% decrease in rail shipments and a 2% decrease in coal shipped by waterways in 2019 compared to 2018. This decrease in coal shipments has led to a slight decrease in the overall transportation costs of coal in the United States. In 2023, the average transportation cost for coal in the U.S. was $18.77 per ton, a slight decrease from $19.29 per ton in 2022. However, it is important to note that the cost of coal transportation is just one component of the total cost of coal-fired electricity, which also includes the price of coal, fuel costs, and other operational expenses.
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Frequently asked questions
The cost of coal electricity varies depending on location and the method of energy generation. In 2022, the average delivered price of coal to the electric power sector in the US was $44.51 per short ton, which equates to a fuel cost of 1.85 cents per kWh of electricity. However, when taking into account external costs such as environmental damage and adverse health impacts, the real cost of coal-generated electricity is estimated to be significantly higher.
The cost of coal electricity can vary depending on factors such as transportation costs, mining conditions, and local regulations. For example, coal prices are generally lower at surface mines compared to underground mines, and transportation costs can account for a significant portion of the final delivered price of coal.
The levelized cost of electricity (LCOE) is a metric used to compare the costs of different methods of electricity generation. On average, utility-scale solar power and onshore wind power have a lower LCOE than coal-fired power stations. However, capital costs for solar and wind power can be higher, and fuel costs for renewable sources are often lower or non-existent.
External costs of coal-generated electricity include environmental impacts, such as emissions contributing to climate change, and adverse health impacts on local populations, such as increased respiratory diseases. These external costs are not typically reflected in the selling price of coal-generated electricity but are borne by society as a whole.
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