Optical design and experimental characterization of a solar concentrating dish system for fuel production via thermochemical redox cycles

Dähler, Fabian; Wild, Michael; Schäppi, Remo; Haueter, Philipp; Cooper, Thomas; Good, Philipp; Larrea, Carlos; Schmitz, Max; Furler, Philipp; Steinfeld, Aldo

doi:10.1016/j.solener.2018.05.085

Cited by 68 publications

(31 citation statements)

References 21 publications

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“…The principal of Snell Law used to calculate the ray tracing where the incoming angle and reflected angle have the same value [7], [19]. The ray tracing method utilized on the concentrator solar and optic to get the ray distribution on the absorber's surface [5], [9,10]. The general line equation of y = mx+c was applied at the ray tracing method.…”

Section: Ray Tracing Methodsmentioning

confidence: 99%

“…CSP technology for high concentration using two-stage parabola dish concentrators was modelled on some research for instance, the concave shape utilization eliminated the dark areas on the receiver [6,7], 500× geometrical concentration improvement [8], the thermal efficiency increased to 68.6% [9], and have high optical efficiency of 80-82% [10,11]. Several models of two-stage parabolic dish concentrator were only able to be used on small to medium receiver e.g., High Concentrator Photovoltaic (HCPV) and Stirling Engine.…”

Section: Introductionmentioning

confidence: 99%

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Optimal Control of Robotic Arm System to Improve Flux Distribution on Dual Parabola Dish Concentrator

Wardhana¹,

Ashari²,

Suryoatmojo³

2020

IJIES

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To concentrate the rays to the focal point and stabilize the temperature on the receiver were one of the complex works of the two-stage solar concentrator. This paper offers a new method of Fuzzy cascade controller system based on tuning up the optimization at Genetic Algorithm-simple additive weighting (GA-SAW) on the dual parabolic dish concentrator with Compound Parabolic Concentrator. The model and computation of three degrees of freedom robotic arm movement with the ray tracing method were used as the concentrator position predictor. In this research, the acquired fuzzy controller result had an average settling time 0.497 sec, and average rise time 0.277 sec faster than a conventional PID controller. This research was able to overcome the disturbance which was diffused rays, so there was a better output with the power and heat flux increased up to 62.49%. The monte carlo ray tracing method from Tonatiuh Software was used to investigate and movement validation of the dual parabola concentrator by showed the flux distribution on the receiver's absorber. In the last stage, an experiment with a prototype had been conducted as a response verification of the controller system which produce a receiver temperature output as high as 121ºC. The final result showed that the controller system managed to optimize the temperature on the receiver's absorber and generate a stable thermoelectric output with power of 1.01 Watt.

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Section: Ray Tracing Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimal Control of Robotic Arm System to Improve Flux Distribution on Dual Parabola Dish Concentrator

Wardhana¹,

Ashari²,

Suryoatmojo³

2020

IJIES

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“…According to published data, the thermal power of this type of solar dish is 48.1 kWth [64]. For both receivers, an optical efficiency of 60% is assumed based on available measurements [65,66]. (11) The five considered scenarios are described in Figure 5 and Table 2 alongside with the baseline.…”

Section: Considered Scenariosmentioning

confidence: 99%

Section: Considered Scenariosmentioning

confidence: 99%

Synergies between Direct Air Capture Technologies and Solar Thermochemical Cycles in the Production of Methanol

2021

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Methanol is an example of a valuable chemical that can be produced from water and carbon dioxide through a chemical process that is fully powered by concentrated solar thermal energy and involves three steps: direct air capture (DAC), thermochemical splitting and methanol synthesis. In the present work, we consider the whole value chain from the harvesting of raw materials to the final product. We also identify synergies between the aforementioned steps and collect them in five possible scenarios aimed to reduce the specific energy consumption. To assess the scenarios, we combined data from low and high temperature DAC with an Aspen Plus® model of a plant that includes water and carbon dioxide splitting units via thermochemical cycles (TCC), CO/CO2 separation, storage and methanol synthesis. We paid special attention to the energy required for the generation of low oxygen partial pressures in the reduction step of the TCC, as well as the overall water consumption. Results show that suggested synergies, in particular, co-generation, are effective and can lead to solar-to-fuel efficiencies up to 10.2% (compared to the 8.8% baseline). In addition, we appoint vacuum as the most adequate strategy for obtaining low oxygen partial pressures.

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“…Many reactor designs were proposed and tested with the ultimate goal of improving the solar-to-fuel efficiency Diver et al, 2010;Lapp et al, 2013;Dähler et al, 2018;Wang et al, 2020;Wang et al, 2021). They can be categorized into designs with solid and/or gas heat recuperation (Ermanoski et al, 2013;Lapp and Lipiński, 2014;Hathaway et al, 2016) and designs without heat recuperation (Welte et al, 2016;Marxer et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis of a Conceptual Fixed-Bed Solar Thermochemical Cavity Receiver–Reactor Array for Water Splitting Via Ceria Redox Cycling

Yang

Wang

et al. 2021

Front. Energy Res.

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We propose a novel solar thermochemical receiver–reactor array concept for hydrogen production via ceria redox cycling. The receiver–reactor array can improve the solar-to-fuel efficiency by realizing the heat recuperation, reduction, and oxidation processes synchronously. A linear matrix model and a lumped parameter model are developed to predict thermal performance of the new solar thermochemical system. The system thermal performance is characterized by heat recovery effectiveness of solid-phase and solar-to-fuel efficiency. Investigated parameters include reduction temperature, oxygen partial pressure, number of receiver–reactors, concentration ratio, and gas-phase heat recovery effectiveness. For baseline conditions, the solid-phase heat recovery effectiveness and the solar-to-fuel efficiency are found to be 81% and 27%, respectively. For perfect gas-phase heat recovery and a solar concentration ratio of 5,000, the solar-to-fuel efficiency exceeds 40%.

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Optical design and experimental characterization of a solar concentrating dish system for fuel production via thermochemical redox cycles

Cited by 68 publications

References 21 publications

Optimal Control of Robotic Arm System to Improve Flux Distribution on Dual Parabola Dish Concentrator

Optimal Control of Robotic Arm System to Improve Flux Distribution on Dual Parabola Dish Concentrator

Synergies between Direct Air Capture Technologies and Solar Thermochemical Cycles in the Production of Methanol

Thermodynamic Analysis of a Conceptual Fixed-Bed Solar Thermochemical Cavity Receiver–Reactor Array for Water Splitting Via Ceria Redox Cycling

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