Two-tank molten salt storage for parabolic trough solar power plants

Herrmann, Ulf; Kelly, Bruce; Price, Henry

doi:10.1016/s0360-5442(03)00193-2

Cited by 529 publications

(205 citation statements)

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“…The selection of the best HTF is based firstly on the application temperature range to ensure the compatibility of the fluid with the system. As HTF, Molten salts reach the highest temperature (565°C) but they have high freezing temperature which leads to complications in the collector field [2]. Steam is mostly used in Fresnel collector by the way heat exchangers are avoided.…”

Section: Introductionmentioning

confidence: 99%

Life time analysis of thermal oil used as heat transfer fluid in CSP power plant

Grirate

Zari

Elmchaouri

et al. 2016

AIP Conference Proceedings

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Abstract. The present work describes stability testing of hydrogenated terphenyl (HT), thermal oil available in the market and considered as a potential HTF for CSP power plants. Before ageing tests, hydrogenated terphenyl was compared to Biphenyl/diphenyl oxide (DPO) at the initial state, which is the most commonly used HTF in CSP plants (SEGS VI and ANDASOL I) and included as a comparison material in the NREL HTF requirements. The (HT) stability tests were performed in sealed ampoules (stainless steel) under inert gas blanket in the range of temperature between 250°C and 350°C (max temperature of HT) for 500 hrs. After ageing, many investigations were made to track the thermal oil behavior after extended time over a range of temperature, such as chemical composition, flash point, viscosity, acid value…. Laboratory testing indicated that the hydrogenated terphenyl (HT) is stable after ageing process at a temperature of about 250°C. Nevertheless, it has shown signs of serious thermal cracking at elevated temperature which is reflected by low flash point temperature. Therefore, the system must be purged effectively to purge the volatile decomposition products.

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Section: Introductionmentioning

confidence: 99%

Life time analysis of thermal oil used as heat transfer fluid in CSP power plant

Grirate

Zari

Elmchaouri

et al. 2016

AIP Conference Proceedings

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“…Whereas, metering of tap water does not represent a grand scientific challenge, there are a variety of less mundane situations where noncontact flow measurement through opaque walls or in opaque liquids would be highly desirable. Such applications include flow metering of chemicals, food, beverages, blood, aqueous solutions in the pharmaceutical industry, molten salts in solar thermal power plants, 5 and high temperature reactors 6 as well as glass melts for high-precision optics. 7 Here, we demonstrate that Lorentz force velocimetry (LFV) 8 which has been developed for a narrow field of application-namely flow measurement of liquid metals in metallurgy 9 -can be transformed into a universal noncontact flow measurement technique using ideas of Henry Cavendish 10 and successors [11][12][13][14] for the measurement of Newton's gravitational constant G. Our simple flowmeter to be described below, whose measurement uncertainty is considerably larger than in state-of-the-art G-measurements, shows already that LFV can be applied to liquids with electrical conductivities from 10 6 S/m down to 1 S/m.…”

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confidence: 99%

A universal noncontact flowmeter for liquids

Wegfraß

Diethold

Werner

et al. 2012

Applied Physics Letters

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Lorentz force velocimetry (LFV) is a noncontact electromagnetic flow measurement technique for liquid metals that is currently used in fundamental research and metallurgy. Up to now, the application of LFV was limited to the narrow class of liquids whose electrical conductivity is of the order 106 S/m. Here, we demonstrate that LFV can be applied to liquids with conductivities up to six orders of magnitude smaller than in liquid metals. We further argue that this range can be extended to 10−3 S/m under industrial and to 10−6 S/m under laboratory conditions making LFV applicable to most liquids of practical interest.

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“…When the parasitic cooling and HTF pump loads are taken into the account, the maximum net capacity of the plant is about 120 MW-e. This plant includes a two-tank TES system, which we assume to have a roundtrip efficiency of 98.5% [9] and hourly heat losses of 0.031% of the energy in storage [4,17]. We assume that the CSP plants have a SM of 2.0 and four hours of TES which is based on baseline plant designs in the 9 CSP literature [8].…”

Section: Methodsmentioning

confidence: 99%

Transmission Benefits of Co-Locating Concentrating Solar Power and Wind

Sioshansi¹,

Denholm²

2012

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NOTICEThis report was prepared as an account of work sponsored by an agency of the United States government. Neither the United States government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States government or any agency thereof. Executive SummaryThis report discusses and analyzes the potential benefits of co-locating wind and concentrating solar power (CSP) plants in the southwestern United States. Using a location in western Texas as a case study, we demonstrate that such a deployment strategy can improve the capacity factor of the combined plant and the associated transmission investment. This is because of two synergies between wind and CSP. One is that real-time wind and solar resource availability tend to be slightly negatively correlated. The other is that low-cost and highly efficient thermal energy storage (TES) can be incorporated into CSP. TES allows solar generation to be shifted and used to fill-in excess transmission capacity not being used by wind. Adding TES in a transmission constrained system can reduce, but not eliminate curtailment, especially during periods of extended high wind output and high solar output. Adding transmission constraints associated with co-location also reduces performance, including the inability of CSP to provide maximum output during periods of both high demand and significant wind output. Overall the economic tradeoff between transmission costs and system performance is highly sensitive to assumptions regarding transmission and CSP costs. Using data from the years 2004 and 2005, we demonstrate that a number of deployment configurations, which include up to 56% CSP (on a capacity and energy basis) yield a positive net return on investment.vi

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Two-tank molten salt storage for parabolic trough solar power plants

Cited by 529 publications

References 1 publication

Life time analysis of thermal oil used as heat transfer fluid in CSP power plant

Life time analysis of thermal oil used as heat transfer fluid in CSP power plant

A universal noncontact flowmeter for liquids

Transmission Benefits of Co-Locating Concentrating Solar Power and Wind

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