Review of the operational flexibility and emissions of gas- and coal-fired power plants in a future with growing renewables

González-Salazar, Miguel Angel; Kirsten, Trevor; Prchlík, Luboš

doi:10.1016/j.rser.2017.05.278

Cited by 394 publications

(177 citation statements)

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“…Like coal, natural gas can provide a steady supply to urban and industrial areas but crucially, gas fired plants are also a better fit to variable renewable energies, thanks to their higher operational flexibility and lower capital cost. With the deployment of the huge renewable energy potential in Africa, most of which is variable and not dispatchable (like solar and wind), there will be a need for dispatchable power plants which will operate in mid-load: it is here that gas has an advantage over coal (Gonzalez-Salazar et al 2018). Gas fired power generation is often cheaper than coal based power generation, in fact the investment cost of a gas fired power plant are half (combined cycle) or a quarter (gas turbine) compared to a coal fired power plant.…”

Section: Natural Gas Potentialmentioning

confidence: 99%

Energy in Africa

Häfner¹,

Tagliapietra²,

Strasser³

2018

SpringerBriefs in Energy

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Energy in Africa Challenges and Opportunities SpringerBriefs in EnergySpringerBriefs in Energy presents concise summaries of cutting-edge research and practical applications in all aspects of Energy. Featuring compact volumes of 50-125 pages, the series covers a range of content from professional to academic. Typical topics might include:• A snapshot of a hot or emerging topic • A contextual literature review • A timely report of state-of-the art analytical techniques • An in-depth case study • A presentation of core concepts that students must understand in order to make independent contributions.Briefs allow authors to present their ideas and readers to absorb them with minimal time investment. Briefs will be published as part of Springer's eBook collection, with millions of users worldwide. In addition, Briefs will be available for individual print and electronic purchase. Briefs are characterized by fast, global electronic dissemination, standard publishing contracts, easy-to-use manuscript preparation and formatting guidelines, and expedited production schedules. We aim for publication 8-12 weeks after acceptance.Both solicited and unsolicited manuscripts are considered for publication in this series. Briefs can also arise from the scale up of a planned chapter. Instead of simply contributing to an edited volume, the author gets an authored book with the space necessary to provide more data, fundamentals and background on the subject, methodology, future outlook, etc. Open Access This book is licensed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made. The images or other third party material in this book are included in the book's Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the book's Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher nor the authors or the editors give a warranty, express or implied, with respect to the material contained herein or for any errors or omissions that may have been made. The publisher remains neutral with regard to jurisdictional claims in published maps and institutional affi...

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Section: Natural Gas Potentialmentioning

confidence: 99%

Energy in Africa

Häfner¹,

Tagliapietra²,

Strasser³

2018

SpringerBriefs in Energy

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“…The coal fired units delivering the flexibility services will need to run more frequently at partial loads by ramping up or down, or to be started up and shut down [16]. The start-up time, minimum load, and ramp rate of coal fired units are the key factors for their operational flexibility [13,17,18], which usually increase their operation and maintenance costs [19]. The startup of a unit increases the extra cost of the power generation [13], mainly for heating up its components and steam cycle.…”

Section: Introductionmentioning

confidence: 99%

“…The startup of a unit increases the extra cost of the power generation [13], mainly for heating up its components and steam cycle. According to the shutdown period of a unit before its startup, there are generally there types of startups, which are hot startup (less than 8 hours since unit shutdown), warm startup (between 8 and 48 hours since unit shutdown) and cold startup (more than 48 hours since unit shutdown), and their definitions can vary between manufacturers [13,17,20]. The startups of the units delivering the flexibility are often hot startups, or warm startups.…”

Section: Introductionmentioning

confidence: 99%

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The Strategies for Improving Energy Efficiency of Power System with Increasing Share of Wind Power in China

Zhao

Shen

2019

Energies

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Coal-fired power generation will dominate the electricity supply in China in the foreseeable future. Coal fired power units can play a crucial role in integrating intermittent wind energy and improving the overall energy efficiency of the power system. The integration benefits of wind power, along with the gains of high load rates of coal fired units, should be fully taken into account. An optimal model combining wind power and coal fired units is built to analyze the operational flexibility of coal fired units and the integration of wind power. Taking the coal fired units in North China Power Grid as an example, the dispatch costs and benefits are examined under the energy efficiency dispatch mode, in comparison with those under the fair dispatch rules and the installed capacity. The results show that increasing the flexibility of the power system under the energy efficiency dispatch mode may be the best choice for the power system with the high share of coal fired units to integrate more wind power, and that the units delivering flexibility services are financially influenced. The results also indicate that a certain amount of wind power curtailment may be reasonable, and that rational penalty rate and fees for the curtailment of wind power may help to optimize the operation of the power system and integrate more wind power. Based on these results, policy and strategy recommendations are proposed to promote the flexibility of coal fired units and change their operation mode and their dispatch mode in the power system.Energies 2019, 12, 2376 2 of 22 to integrate renewable energy, but hydroelectric generation is affected by the environment, seasons, etc. [7], and the capacity share of pumped-hydro energy storage stations is less than 9 percent of overall hydroelectric generation capacity in China [8]. Hydroelectric generation is also clean energy and is always granted priority dispatch. All these factors affect the flexibility services provided by the hydroelectric power units. China lacks flexibility sources for renewable energy integration, which are available in other countries with high share of renewable energy.Energies 2019, 12, x FOR PEER REVIEW 2 of 33 Hydropower and Gas-fired power stations are usually regarded as peak regulation sources or flexibility sources to integrate renewable energy, but hydroelectric generation is affected by the environment, seasons, etc. [7], and the capacity share of pumped-hydro energy storage stations is less than 9 percent of overall hydroelectric generation capacity in China [8]. Hydroelectric generation is also clean energy and is always granted priority dispatch. All these factors affect the flexibility services provided by the hydroelectric power units. China lacks flexibility sources for renewable energy integration, which are available in other countries with high share of renewable energy.

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“…Thermal power plant performance can be evaluated through energetic performance criteria, which are electrical power and thermal efficiency. In recent decades, exergy analysis of plant has been found as a useful method in the design, evaluation, optimization and improvement of thermal power plants [3][4][5]. Exergy analysis helps in finding the losses taking place in a system.…”

Section: Introductionmentioning

confidence: 99%

Ti Microholes Potential for Thermal Power Plants Application Punched by WC/Co Micropunch

Guo¹,

Tam²

2018

Thermal Power Plants - New Trends and Recent Developments

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The use of microholes is a potential approach to enhance fluid flow and heat exchange within thermal power plants, especially for the turbines. Ascribed to eco environmental competition, micropunching is extremely suitable for the mass production of micro features with friendly eco effects. Therefore, the morphology variation of micropunch and microhole during the punching with WC/Co micropunches was investigated by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS) and confocal laser. Results reveal that due to the optimal joint contribution of WC and Co, the formed microholes satisfy with the practical requirements in the quasi stable period. Moreover, the serious wear of micropunch occurs with the wear loss both of Co and WC when the punching number exceeds 1525. With the further increment in punching numbers, the dominant factors of the wear loss would mainly rely on the easily peeled off WC due to the serious loss of Co. In addition, the microholes can be adequately processed after about 30 min by natural sand grains. The quality of the hole would decrease with further increase in processing time and sand accumulation becomes severe.

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Review of the operational flexibility and emissions of gas- and coal-fired power plants in a future with growing renewables

Cited by 394 publications

References 10 publications

Energy in Africa

Energy in Africa

The Strategies for Improving Energy Efficiency of Power System with Increasing Share of Wind Power in China

Ti Microholes Potential for Thermal Power Plants Application Punched by WC/Co Micropunch

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