Everything You Think You Know About Coal in China Is Wrong
By
Melanie Hart,
Luke Bassett, and
Blaine Johnson Posted on May 15, 2017, 12:01 am
View attachment 399633
AP/Mark Schiefelbein
A worker watches as a conveyor loads coal onto a trailer truck at a coal mine near Ordos in northern China's Inner Mongolia Autonomous Region, November 2015.
See also: “Research Note on U.S. and Chinese Coal-Fired Power Data” by Melanie Hart, Luke Bassett, and Blaine Johnson
China’s energy markets send mixed signals about the nation’s policy intentions and emissions trajectory. Renewable energy analysts tend to focus on China’s massive renewable expansion and view the nation as a global clean energy leader; coal proponents and climate skeptics are more likely to focus on the number of coal plants in China—both in operation and under construction—and claim its climate rhetoric is more flash than substance.
In December 2016, the Center for American Progress brought a group of energy experts to China to find out what is really happening. We visited multiple coal facilities—including a coal-to-liquids plant—and went nearly 200 meters down one of China’s largest coal mines to interview engineers, plant managers, and local government officials working at the front lines of coal in China.
We found that the nation’s coal sector is undergoing a massive transformation that extends from the mines to the power plants, from Ordos to Shanghai. China is indeed going green. The nation is on track to overdeliver on the emissions reduction commitments it put forward under the Paris climate agreement, and making coal cleaner is an integral part of the process.
From a climate perspective, the ideal scenario would be for China to shut down all of its coal-fired power plants and switch over to clean energy full stop. In reality, China’s energy economy is a massive ship that cannot turn on a dime. The shift toward renewables is happening: China’s Paris commitment includes a promise to install 800 gigawatts to 1,000 gigawatts of new renewable capacity by 2030, an amount equivalent to the capacity of the entire U.S. electricity system.
1 While China and the United States have roughly the same land mass, however, China has 1.3 billion people to the United States’ 325 million.
2 It needs an electricity system that is much larger, so adding the renewable equivalent of one entire U.S. electricity system is not enough to replace coal in the near to medium term. To bridge the gap, China is rolling out new technologies to drastically reduce local air pollution and climate emissions from the nation’s remaining coal plants.
This issue brief covers three things American observers need to understand about coal in China:
- China’s new coal-fired power plants are cleaner than anything operating in the United States.
- China’s emissions standards for conventional air pollutants from coal-fired power plants are stricter than the comparable U.S. standards.
- Demand for coal-fired power is falling so quickly in China that the nation cannot support its existing fleet. Many of the coal-fired power plants that skeptics point to as evidence against a Chinese energy transformation are actually white elephants that Chinese leaders are already targeting in a wave of forced plant closures.
Energy solutions that work well for China will not necessarily work well for the United States. In addition to the massive population disparity, the United States has access to cheap and plentiful shale gas, and China does not. If China is going to reduce emissions substantially, more efficient coal generation has to be part of its equation, at least for the near to medium term. In the United States, investing in next-generation clean coal plants is not a good solution because natural gas is cheap, plentiful, and lower-emitting than all but the most expensive coal-fired power.
Regardless of what works best in the U.S. market, understanding how Beijing is transforming its coal sectors is critical for understanding what to expect from the Chinese energy market going forward and how we should view China’s position in the global effort to combat climate change.
China is greening its coal fleet
Beijing is stuck between a rock and a hard place. On the one hand, China cannot eradicate coal-fired power from its energy mix overnight. China has not yet figured out how to develop its own natural gas supplies—which are more difficult to access and therefore more expensive than those in the United States—and renewable energy expansion takes time. On the other hand, Chinese citizens are demanding cleaner air, and they want immediate improvements. Air quality is now a political priority for the Chinese Communist Party on par with economic growth and corruption. This means that China cannot continue to run the same high-pollution coal plants that were considered acceptable decades ago. Beijing’s solution is to move full speed ahead with renewables while simultaneously investing in what may become the most efficient, least polluting coal fleet the world has ever seen.
Not all coal-fired power is created equal. Emissions and efficiency—the latter being the amount of coal consumed per unit of power produced, which also affects emissions—vary dramatically based on the type of coal and coal-burning technology used. What many U.S. analyses of China’s coal sector overlook is the fact that Beijing has been steadily shutting down the nation’s older, low-efficiency, and high-emissions plants to replace them with new, lower-emitting coal plants that are more efficient that anything operating in the United States.
To better understand where China’s coal fleet is going, CAP compared the top 100 most efficient coal-fired power units in the United States with the top 100 in China. (see Tables A1 and A2) The difference is astounding.
Compared with the Chinese coal fleet, even the best U.S. plants are running older, less efficient technologies. Coal-fired power plants can generally be broken down into three categories:
- Subcritical: In these conventional power plants, coal is ignited to boil water, the water creates steam, and the steam rotates a turbine to generate electricity.3 The term “subcritical” indicates that internal steam pressure and temperature do not exceed the critical point of water—705 degrees Fahrenheit and 3,208 pounds per square inch.4
- Supercritical: These plants use high-tech materials to achieve internal steam temperatures in the 1,000–1,050 degrees Fahrenheit range and internal pressure levels that are higher than the critical point of water, thus spinning the turbines much faster and generating more electricity with less coal.5
- Ultra-supercritical: These plants use additional technology innovations to bring temperatures to more than 1,400 degrees Fahrenheit and pressure levels to more than 5,000 pounds per square inch, thus further improving efficiency.6
The U.S. coal fleet is much older than China’s: The average age of operating U.S. coal plants is 39 years, with 88 percent built between 1950 and 1990.
7 Among the top 100 most efficient plants in the United States, the initial operating years range from 1967 to 2012. In China, the oldest plant on the top 100 list was commissioned in 2006, and the youngest was commissioned in 2015.
The United States only has one ultra-supercritical power plant.
8 Everything else is subcritical or, at best, supercritical. In contrast, China is retiring its older plants and replacing them with ultra-supercritical facilities that produce more energy with less coal and generate less emissions as well. Out of China’s top 100 units, 90 are ultra-supercritical plants.
When the capacity of each of the top 100 units in each nation is taken into account, ultra-supercritical technology accounts for 92 percent of Chinese top 100 capacity and less than one percent—0.76 percent—of U.S. top 100 capacity. Because the technological makeup of the Chinese plants is different, their emissions levels are different as well. In the United States, the total nameplate capacity of our top 100 most efficient coal-fired power units is 80.1 gigawatts, and their cumulative annual carbon emissions amount to 361,924,475 metric tons.
9 Meanwhile, the total nameplate capacity of China’s top 100 units is 82.6 gigawatts, and their cumulative annual carbon emissions are an estimated 342,586,908 metric tons.
10 Since China’s fleet uses more advanced technology, it also consumes less coal: an average of 286.42 grams of coal equivalent, or gce, consumed per kilowatt-hour of power produced in China versus 374.96 gce consumed per kilowatt-hour produced at lower heating value in the United States.
To be sure, China still has plenty of older coal-fired power units that are not using the most advanced technology. According to the latest third-party research from S&P Global Platts, which provides research on global energy infrastructure, when the data set is expanded to include all operating coal-fired power capacity in China—which totals 920 gigawatts—approximately 19 percent uses ultra-supercritical technology, 25 percent uses supercritical technology, and 56 percent uses subcritical technology.
11 However, the new builds are increasingly ultra-supercritical plants, and Beijing is steadily ratcheting up the emissions requirements and efficiency standards for those older plants as well.
By 2020, every existing coal-fired power unit in China must meet an efficiency standard of 310 gce per kilowatt-hour; any units that do not meet that standard by 2020 will be retired. In contrast, none of the current top 100 most efficient U.S. coal-fired power units would meet that same efficiency standard today. (see Table A2)
The simple fact is that the United States has a wide array of cheap and abundant energy options that now compete with coal-fired electricity generation—particularly shale gas and renewables. Given the additional context of falling U.S. electricity demand and improving efficiency, even U.S. electric utility executives have indicated that their business models are rebalancing toward these options—and away from coal.
12 Although higher-tech plants, such as ultra-supercritical plants, have lower operation and maintenance costs than their less efficient counterparts, overnight capital costs are, on average, around 17 percent higher.
13 In a market where even the least expensive coal-fired plants are struggling to compete with shale-gas-fired plants, those investments do not make good financial sense.
One thing China’s experience makes very clear is that even if the United States were to invest in newer, more efficient coal plants, it would not be a major jobs generator on par with renewable energy. As China’s power plants are becoming more efficient in their energy consumption and emissions, they are also becoming more efficient in terms of labor. The CAP research team visited the Shanghai Waigaoqiao No. 3 power station. That plant runs two 1,000 megawatt ultra-supercritical units and supports 250 employees.
14 In contrast, the nearby Waigaoqiao No. 1 and Shidongkou No. 1 power stations each run four 300 megawatt subcritical units and employ 600 people and 1,000 people, respectively.
15
The same thing is happening in China’s coal mines. As the operations become higher tech, they become cleaner and more efficient, and those jobs decrease as well. This is one reason Beijing expects its coal sector to lay off 1.3 million workers from 2016 to 2020.
16 Chinese leaders view renewable energy as a much more dependable employment generator; they expect the nation’s renewable sectors to generate 13 million new jobs by 2020.
17
China’s energy employment shifts follow a pattern that has been unfolding in the United States for decades. U.S. coal mining employment peaked in the 1920s and then began a long and steady decline. From 1983 to 2014, U.S. coal production increased more than 28 percent, but employment still fell 59 percent.
18 This reflects a shift in U.S. coal production from more labor-intensive underground mining in the eastern United States to more highly mechanized and easily accessible surface mining in the west.
19 Falling U.S. electricity demand, rising energy efficiency, and sharp price drops for natural gas, solar, and wind compounded U.S. energy employment shifts by reducing utilities’ dependence on and demand for coal.
20 At year-end 2016, the United States had a total of 54,030 coal operator employees nationwide.
21 In contrast, between 2015 and 2016, the United States added 73,615 new jobs in solar energy generation—a nearly 25 percent year-on-year increase—bringing the total number of U.S. solar energy generation jobs to 373,807 nationwide.
22
China’s emissions standards are stronger than ours
One of the levers that Beijing is pulling to move China’s coal-fired power fleet toward the cleanest, most efficient technologies on the market is steadily tightening pollution emissions standards.
China hit an inflection point on air pollution in late 2011. That fall, a series of pollution crises highlighted the fact that Beijing’s public air quality reporting system—which measured air quality based on the number of “blue sky days”
23 achieved per year, some of which looked decidedly gray to citizen observers—did not provide Chinese citizens with accurate information about local air quality.
24 Chinese citizens demanded more accurate information—particularly on small-particulate pollution, or PM 2.5, which the Chinese government was refusing to share—and refused to back down.
25 Facing a rising political crisis, Chinese leaders shifted their strategy.
26 Instead of continuing to hide air quality information from its citizens to give polluters more leeway to pursue breakneck growth, Beijing flipped the script by going public with the nation’s pollution data and using citizen anger as a lever to force polluters to comply with the nation’s environmental regulations.
27 As part of that broader strategy, Beijing rolled out a new air quality monitoring system that now provides real-time information on air quality across the nation.
28
Prior to this shift, Chinese citizens knew the air was bad but did not have the scientific information they needed to tie air quality to specific health effects. Today, Chinese citizens assess local PM 2.5 levels throughout the day and know what those particulates are doing to their children.
29 For the Chinese Communist Party, there is no going back—this is now a political survival issue, and recent regulatory trends reflect that.
Starting in 2014,
30 China rolled out new air pollution emissions standards for new and existing coal-fired power plants that are stronger than the comparable standards from the European Union and the United States. When visiting coal facilities in China, CAP found that some coal-fired power facilities display real-time emissions levels for these key local air pollutants on large billboards outside the main gate, particularly the cleaner plants that want to advertise their technical superiority.
Currently, Beijing is primarily concerned with tightening emissions standards for conventional air pollution, since that is the primary concern of the Chinese public. The next round of regulatory tightening will target carbon dioxide.
Beijing is already moving to address carbon pollution by rolling out strict new standards for plant efficiency. These standards force Chinese plants to reduce the amount of coal consumed—and thus the amount of carbon emitted—per unit of power produced. By 2020, all coal-fired units nationwide must achieve the following efficiency standards or shut down: 300 gce per kilowatt-hour for all new plants and 310 gce per kilowatt-hour for all existing plants.
31 No plant on the U.S. top 100 list can currently meet these efficiency standards. The United States currently does not have any enforceable federal emissions standards for carbon pollution from power plants, and the Trump administration is in the process of reviewing—and potentially weakening or nullifying—the Obama-era carbon emissions standards for new and existing power plants.
32
If current U.S. regulatory trends continue, by 2020, every coal plant operating in the United States would be illegal to operate in China.
Conclusion
The United States has a broader array of energy options than China does. However, China is innovating and investing heavily in what it has, and some of the transformations it is achieving already are truly impressive.
China’s leaders have made a strategic choice about the direction of the country: They are aiming to shift from an economy based on heavy, polluting industries to one driven by technology and innovation. The political will for this upgrade has roots in both international geostrategic ambitions and domestic popular grievances about lagging standards of living—and it is beginning to bear fruit. In the process, however, vested interests and technical stumbling blocks have wasted resources and acted as a ballast against Chinese progress. China has the potential to do much more, and the international community should push it to achieve that potential.
For the United States, the signal should be clear: We cannot compete with China on coal-fired power, nor should we aspire to do so. Mimicking China’s development path with regards to intensive coal development would ignore economic reality and the United States’ competitive advantages in the electricity sector and beyond.
Read the full article at
https://www.americanprogress.org/is...32141/everything-think-know-coal-china-wrong/
, according to Yao Min, deputy general manager of Shenhua Ningxia Coal Industry Group.
