HPS2 – demonstration of molten-salt in parabolic trough plants – Design of plant

Wittmann, Michael; Schmitz, Mark; Silva, Hugo; Schmidt, Péter; Doppelbauer, Günter; Ernst, R. A.; Santamaria, Patricia; Miltkau, Thorsten; Golovca, Dorin; Pacheco, Luis Alfonso Moreno; Högemann, Daniel; Meyer-Grünefeldt, Mirko; Seubert, Bernhard

doi:10.1063/1.5117642

Cited by 11 publications

(6 citation statements)

References 5 publications

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“…Certain lesson-learnt results associated with the use of molten salt as HTF in parabolic troughs in HPS-2 (HelioTrough ® 2.0, "HT2") have indicated that the collector design can be further improved [1]. Especially deformations (bending and torsion) of a continuous-beam torque tube structure as well as the alignment of the solar collector elements (SCE) of an SCA, have been identified as relevant to be minimized for an operation with molten salt because of the high concentration factors used.…”

Section: Collector Improvementmentioning

confidence: 99%

Operating Parabolic Troughs With Molten Salt: Solar Field Optimisation and Ternary Salt Properties

Krüger,

Detzler,

Schmitz

et al. 2024

SolarPACES Conf Proc

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A variety of works have been performed at the Évora Molten Salt Platform on a new collector system especially designed for optimised operation with solar salt as well as tests on a ternary salt. Concerning the new HelioTrough® 3.1 design the paper discusses how 30% less specific mass could be reached. Together with a novel approach to “run-in” bearings, as to lower friction, the torsion could be reduced significantly. Resultingly costs were reduced while improving precision of the trough. The ternary salt has been operated between October 2021 and May 2022 in the end reaching operation temperatures up to 500°C. Samples have been taken and analysed to investigate nitrite and nitrate development amongst others. The heat capacity of the Yara Molten Salt has been determined with now a high level of precision, as well as the density.

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Section: Collector Improvementmentioning

confidence: 99%

Operating Parabolic Troughs With Molten Salt: Solar Field Optimisation and Ternary Salt Properties

Krüger,

Detzler,

Schmitz

et al. 2024

SolarPACES Conf Proc

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“…molten salt power tower [40,76] and parabolic trough with thermal oil [41,93], as well as novel CSP configurations, e.g. direct parabolic trough with molten salt [94,95], linear Fresnel [96], supercritical steam [97][98][99], supercritical CO 2 cycles [22,98,100], higher operation temperatures with carbonate or chloride salt [22,97], solar gas turbines with Rankine bottom cycle [98], power tower topping cycle with molten metal [97,86], hybrid CSP-fossilplants, e.g. with natural gas or coal [83,98,[101][102][103], hybrid CSP plants with integration of photovoltaics (e.g., PV/CSP hybrid plant in Morocco, [98,104,105].…”

Section: Integration Of Molten Salt Storage In Csp Plantsmentioning

confidence: 99%

Molten Salt Storage for Power Generation

Bauer

Odenthal

Bonk

2021

Chemie Ingenieur Technik

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Storage of electrical energy is a key technology for a future climate‐neutral energy supply with volatile photovoltaic and wind generation. Besides the well‐known technologies of pumped hydro, power‐to‐gas‐to‐power and batteries, the contribution of thermal energy storage is rather unknown. At the end of 2019 the worldwide power generation capacity from molten salt storage in concentrating solar power (CSP) plants was 21 GWhel. This article gives an overview of molten salt storage in CSP and new potential fields for decarbonization such as industrial processes, conventional power plants and electrical energy storage.

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“…The basis of the simulator is the plant design developed in the HPS2-Project. The process is described in [1]. FIGURE 1 shows and overview of the System modelled.…”

Section: Requirementsmentioning

confidence: 99%

“…As the process for such plants differs in many aspects from the conventional parabolic trough plants with thermal oil as the heat transfer fluid, new challenges arise for control systems and the operational team. Within the HPS2 project, the German Aerospace Centre (DLR) together with various research and industry partners builds up a test plant for research on line-focusing collectors with molten salt as the heat transfer fluid (HTF) in Évora, Portugal [1]. The Test loop will be the basis of the Évora Molten Salt Platform (EMSP), which will house future research projects [2].…”

Section: Introductionmentioning

confidence: 99%

Development of training simulator software for molten salt parabolic trough test platform

Hoegemann¹,

Noureldin²,

Bamberger³

et al. 2019

SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems

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Operators of a solar-thermal power plant bear a high responsibility as they are in charge of the plant integrity, the safety of staff and optimal performance. At the same time, the complexity of such plants is very high. Thus, skilled operators are needed to understand what they do and, especially, how to react in non-standard plant conditions. Training the operators for these situations is very important for trouble-free operation. Those items become particularly crucial for testing of parabolic trough plants with molten salt as working fluid, as they inherit the danger of HTF freezing at normal ambient conditions. DLR developed a training simulation software as a platform to train the operators in dealing with various scenarios and test automation concepts for plant control for the test facility in the HPS2 project. The simulator software features a detailed model for transient simulation of the solar field based on DLR's Virtual Solar Field (VSF), a simulator management system and a human-machine interface (HMI). VSF communicates via a standard TCP/IP interface with the simulator management. The plant model features detailed modelling of the hydraulic network and storage system, alarm functions and control logics derived from the functionality of the test plant. The HMI is designed according to the real process control software. Simulations with measured weather data validated the correct behavior of the physical models. To understand the behavior of the plant, the plant model can be completely manually operated. Various weather scenarios can be loaded to show difficulties of transient situations, like a sudden direct normal irradiation (DNI) rise or drop. This enables the trainer to show real operation scenarios of the molten salt plant during the training course without endangering the test facility.

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HPS2 – demonstration of molten-salt in parabolic trough plants – Design of plant

Cited by 11 publications

References 5 publications

Operating Parabolic Troughs With Molten Salt: Solar Field Optimisation and Ternary Salt Properties

Operating Parabolic Troughs With Molten Salt: Solar Field Optimisation and Ternary Salt Properties

Molten Salt Storage for Power Generation

Development of training simulator software for molten salt parabolic trough test platform

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