Frontiers in Energy

ISSN 2095-1701 (Print)
ISSN 2095-1698 (Online)
CN 11-6017/TK
Postal Subscription Code 80-972
Formerly Known as Frontiers of Energy and Power Engineering in China
2019 Impact Factor: 2.657
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An overview of the development history and technical progress of China’s coal-fired power industry
Weiliang WANG, Zheng LI, Junfu LYU, Hai ZHANG, Guangxi YUE, Weidou NI
Front. Energy    2019, 13 (3): 417-426.
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As the main power source of China, coal-fired power industry has achieved a great progress in installed capacity, manufacturing technologies, thermal efficiency, as well as pollutant control during the past century. With the fast development of renewable energies, coal-fired power industry is experiencing a strategic transformation. To specify the development of coal-fired power industry, its development history is reviewed and the technical progresses on aspects of thermal efficiency, pollutants control and peaking shaving capacity are discussed. It is concluded that the role of China’s coal-fired power source would be transformed from the dominant position to a base position in power source structure. Considering the sustainable development of coal-fired power industry in energy conservation, emission control, and utilization of renewable energies, it is suggested that the national average thermal efficiency should be improved by continual up-gradation of units by using advanced technologies and eliminating outdated capacity. Moreover, the emission standard of air pollutants should not be stricter any more in coal-fired power industry. Furthermore, the huge amount of combined heat and power (CHP) coal-fired units should be operated in a decoupled way, so as to release more than 350 GW regulation capacity for the grid to accept more renewable energy power.

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Expulsive force in the development of CO2 sequestration: application of SC-CO2 jet in oil and gas extraction
Haizhu WANG, Gensheng LI, Zhonghou SHEN, Zhenguo HE, Qingling LIU, Bin ZHU, Youwen WANG, Meng WANG
Front. Energy    2019, 13 (1): 1-8.
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With the rapid development of global economy, an increasing amount of attention has been paid to the emission of greenhouse gases, especially CO2. In recent years, dominated by the governments around the world, several significant projects of CO2 sequestration have been conducted. However, due to the huge investment and poor economic effects, the sustainability of those projects is not satisfactory. Supercritical CO2 (SC-CO2) has prominent advantages in well drilling, fracturing, displacement, storage, plug and scale removal within tubing and casing, which could bring considerable economic benefits along with CO2 sequestration. In this paper, based on physicochemical properties of SC-CO2 fluid, a detailed analysis of technical advantages of SC-CO2 applied in oil and gas development is illustrated. Furthermore, the implementation processes of SC-CO2 are also proposed. For the first time, a recycling process is presented in which oil and gas are extracted and the CO2 generated could be restored underground, thus an integrated technology system is formed. Considering the recent interests in the development of enhancing hydrocarbon recoveries and CO2 sequestration, this approach provides a promising technique that can achieve these two goals simultaneously.

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Responding to the Paris Climate Agreement: global climate change mitigation efforts
Yong GENG, Tsuyoshi FUJITA, Anthony CHIU, Hancheng DAI, Han HAO
Front. Energy    2018, 12 (3): 333-337.
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Unconventional energy: Seeking the ways to innovate energy science and technology
Jing LIU, Zhixiong GUO
Front. Energy    2018, 12 (2): 195-197.
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Special issue: Nanotechnology in energy
Changying ZHAO, Zhuomin ZHANG, Xing ZHANG
Front. Energy    2018, 12 (1): 1-4.
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Efficient use of waste heat and solar energy: Technologies of cooling, heating, power generation and heat transfer
Ya-Ling HE, Ruzhu WANG, Anthony Paul ROSKILLY, Peiwen LI
Front. Energy    2017, 11 (4): 411-413.
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Clean energy technology: materials, processes and devices for electrochemical energy conversion and storage
Hong YANG, Junliang ZHANG, Baolian YI
Front. Energy    2017, 11 (3): 233-235.
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Distribution and temporal variability of the solar resource at a site in south-east Norway
Front. Energy    2016, 10 (4): 375-381.
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Globally, solar energy is expected to play a significant role in the changing face of energy economies in the near future. However, the variability of this resource has been the main barrier for solar energy development in most locations around the world. This paper investigated the distribution and variability of solar radiation using the a 10-year (2006 to 2015) data collected at Sørås meteorological station located at latitude 59° 39′ N and longitude 10° 47′E, about 93.3 m above sea level (about 30 km from Oslo), in south-eastern part of Norway. It is found that on annual basis, the total number of days with a global solar radiation of less than 1 kWh/(m2·d) is 120 days while the total number of days with an expected global solar radiation greater than 3 kWh/(m2·d) is 156 days (42.74%) per year. The potential energy output from a horizontally placed solar collector in these 156 days is approximately 75% of the estimated annual energy output. In addition, it is found that the inter-annual coefficient of variation of the global solar radiation is 4.28%, while that of diffuse radiation is 4.96%.

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