Buffer storage for direct steam generation

Steinmann, Wolf-Dieter; Eck, Markus

doi:10.1016/j.solener.2005.05.013

Cited by 142 publications

(82 citation statements)

References 4 publications

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“…CSP systems exhibit less shortterm variability than PV systems because of the thermal inertia within the system (Mehos et al 2009). A parabolic trough plant using an oil-based HTF and employing a modern steam turbine can typically operate with no solar input for about half an hour (Steinmann and Eck 2006). CSP systems with thermal storage can be operated as a dispatchable resource, significantly reducing most variability and predictability concerns.…”

Section: Renewable Electricity Futures Study Volume 2: Renewable Elecmentioning

confidence: 99%

Renewable Electricity Futures Study. Volume 2. Renewable Electricity Generation and Storage Technologies

Augustine

Bain

Chapman

et al. 2012

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Chapter 6. Biopower TechnologiesBain, R.; Denholm, P.; Heath, G.; Mai, T.; Tegen, S. (2012). "Biopower Technologies," Chapter 6. National Renewable Energy Laboratory. Renewable Electricity Futures Study, Vol. 2, Golden, CO: National Renewable Energy Laboratory; pp. 6-1 -6-58. Chapter 7. Geothermal Energy Technologies PerspectiveThe Renewable Electricity Futures Study (RE Futures) provides an analysis of the grid integration opportunities, challenges, and implications of high levels of renewable electricity generation for the U.S. electric system. The study is not a market or policy assessment. Rather, RE Futures examines renewable energy resources and many technical issues related to the operability of the U.S. electricity grid, and provides initial answers to important questions about the integration of high penetrations of renewable electricity technologies from a national perspective. RE Futures results indicate that a future U.S. electricity system that is largely powered by renewable sources is possible and that further work is warranted to investigate this clean generation pathway. The central conclusion of the analysis is that renewable electricity generation from technologies that are commercially available today, in combination with a more flexible electric system, is more than adequate to supply 80% of total U.S. electricity generation in 2050 while meeting electricity demand on an hourly basis in every region of the United States.The renewable technologies explored in this study are components of a diverse set of clean energy solutions that also includes nuclear, efficient natural gas, clean coal, and energy efficiency. Understanding all of these technology pathways and their potential contributions to the future U.S. electric power system can inform the development of integrated portfolio scenarios. RE Futures focuses on the extent to which U.S. electricity needs can be supplied by renewable energy sources, including biomass, geothermal, hydropower, solar, and wind.The study explores grid integration issues using models with unprecedented geographic and time resolution for the contiguous United States. The analysis (1) assesses a variety of scenarios with prescribed levels of renewable electricity generation in 2050, from 30% to 90%, with a focus on 80% (with nearly 50% from variable wind and solar photovoltaic generation); (2) identifies the characteristics of a U.S. electricity system that would be needed to accommodate such levels; and (3) describes some of the associated challenges and implications of realizing such a future. In addition to the central conclusion noted above, RE Futures finds that increased electric system flexibility, needed to enable electricity supply-demand balance with high levels of renewable generation, can come from a portfolio of supply-and demand-side options, including flexible conventional generation, grid storage, new transmission, more responsive loads, and changes in power system operations. The analysis also finds that the abundance and diversity of U.S. renewabl...

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Section: Renewable Electricity Futures Study Volume 2: Renewable Elecmentioning

confidence: 99%

Renewable Electricity Futures Study. Volume 2. Renewable Electricity Generation and Storage Technologies

Augustine

Bain

Chapman

et al. 2012

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show abstract

“…Parabolic trough plants using oil as the heat-transfer fluid and modern direct-steam systems with integrated steam storage vessels can typically operate in a predictable manner with no solar input for a period of about one-half hour (Steinmann and Eck 2006). Dish/engine CSP plants have less thermal inertia than the other CSP technologies, and thus the output of these plants can vary much more with passing clouds.…”

Section: Solar Resource and Technology Characteristics Relevant To Grmentioning

confidence: 99%

SunShot Vision Study: February 2012 (Book)

2012

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“…Liu [20] established a theoretical model to discuss the change in the wall temperature of SAs, concluding that the imbalance of the temperature field inside the SA leads to the resultant irreversible energy loss. To improve the thermal efficiency of SAs, Yang and Manning [21], Steinmann and Eck [22], and Su et al [23] investigated SAs in industrial plants, and the results of these industrial experiments provided theoretical bases for SA design and optimization.…”

Section: Introductionmentioning

confidence: 99%

Operation Optimization of Steam Accumulators as Thermal Energy Storage and Buffer Units

Hong

Wang

2016

Energies

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Abstract:Although steam is widely used in industrial production, there is often an imbalance between steam supply and demand, which ultimately results in steam waste. To solve this problem, steam accumulators (SAs) can be used as thermal energy storage and buffer units. However, it is difficult to promote the application of SAs due to high investment costs, which directly depend on the usage volume. Thus, the operation of SAs should be optimized to reduce initial investment through volume minimization. In this work, steam sources (SSs) are classified into two types: controllable steam sources (CSSs) and uncontrollable steam sources (UCSSs). A basic oxygen furnace (BOF) was selected as an example of a UCSS to study the optimal operation of an SA with a single BOF and sets of parallel-operating BOFs. In another case, a new method whereby CSSs cooperate with SAs is reported, and the mathematical model of the minimum necessary thermal energy storage capacity (NTESC) is established. A solving program for this mathematical model is also designed. The results show that for UCSSs, applying an SA in two parallel-operating SSs requires less capacity than that required between a single SS and its consumer. For CSSs, the proposed minimum NTESC method can effectively find the optimal operation and the minimum volume of an SA. The optimized volume of an SA is smaller than that used in practice, which results in a better steam storage effect.

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Buffer storage for direct steam generation

Cited by 142 publications

References 4 publications

Renewable Electricity Futures Study. Volume 2. Renewable Electricity Generation and Storage Technologies

Renewable Electricity Futures Study. Volume 2. Renewable Electricity Generation and Storage Technologies

SunShot Vision Study: February 2012 (Book)

Operation Optimization of Steam Accumulators as Thermal Energy Storage and Buffer Units

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