Performance analysis of operational strategies for monolithic receiver-reactor arrays in solar thermochemical hydrogen production plants

Brendelberger, Stefan; Rosenstiel, Andreas; López-Román, Anton; Prieto, Cristina; Sattler, Christian

doi:10.1016/j.ijhydene.2020.06.191

Cited by 24 publications

(17 citation statements)

References 32 publications

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“…This limitation can be addressed using cascading pressure receivers where the thermal reduction happens staged in multiple receivers. A series of reduction chambers are used in [39] ).…”

Section: Multireceiver Modelmentioning

confidence: 99%

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Performance Analysis and Optimization of Solar Thermochemical Water‐Splitting Cycle with Single and Multiple Receivers

et al. 2021

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Solar thermochemical water‐splitting cycle models for hydrogen production with single and multiple receivers working between 1773 and 1173 K are developed. The receiver pressures and aperture sizes are optimized for maximum cycle efficiency. The efficiency of the cycle increases with the number of receivers because of the decrease in vacuum pump work. The solar‐to‐fuel efficiency is increased by 14% going from a one receiver system to a four‐receiver system. The performance analyses of the cycles with varying direct normal irradiance (DNI) shows that the advantage of multiple receivers vanishes as DNI decreases because of the constant radiation losses from the receiver apertures. These radiation losses from the aperture can be lowered when a receiver with a variable aperture size is used. The efficiency of a two‐receiver system increases by 48% at DNI 300 W m−2% and 15% at DNI 900 W m−2 using a variable aperture size. The performance of the multireceiver systems with variable aperture size is discussed using a linear regression model. In addition, the option of cogeneration of hydrogen and electricity in a multireceiver system is analyzed. The efficiencies of single‐, two‐, three‐, and four‐receiver systems for cogeneration are 19.6%, 20.0%, 20.57%, and 21.1%, respectively.

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“…This limitation can be addressed using cascading pressure receivers where the thermal reduction happens staged in multiple receivers. A series of reduction chambers are used in [39] ).…”

Section: Multireceiver Modelmentioning

confidence: 99%

“…Figure 2. Vacuum pump efficiency as a function of the inlet pressure (derived from values presented in the study by Brendelberger et al[39] ).…”

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confidence: 99%

Performance Analysis and Optimization of Solar Thermochemical Water‐Splitting Cycle with Single and Multiple Receivers

et al. 2021

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“…For the vacuum pumps, we use a three-stage pump array consisting of two HV40000, one HV8000 and two IDX1300 pumps by Edwards as described by Brendelberger et al [5]. The volume flow that such an array removes from the reduction chamber at p red is called Varray , and the pumping power needed to remove Varray at p red is P array .…”

Section: Reactions and Massmentioning

confidence: 99%

“…The volume flow that such an array removes from the reduction chamber at p red is called Varray , and the pumping power needed to remove Varray at p red is P array . Both Varray and P array are calculated with the data from Brendelberger et al [5]. Scaled to 1 mol/s of product, the pumping power is…”

Section: Reactions and Massmentioning

confidence: 99%

“…Mitigation of anthropogenic greenhouse gas emissions is one of the most important challenges of our time. In this context, technologies for the production of fuels based on solar thermal energy have been investigated frequently in recent years [1][2][3][4][5]. This includes carbon-based liquid fuels, the combustion of which will likely continue to play an important role in the energy and transportation sectors, due to their high energy density.…”

Section: Introductionmentioning

confidence: 99%

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Oxygen Crossover in Solid–Solid Heat Exchangers for Solar Water and Carbon Dioxide Splitting: A Thermodynamic Analysis

Holzemer-Zerhusen

Brendelberger

Roeb

et al. 2020

Journal of Energy Resources Technology

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In solar thermochemical redox cycles for H2O/CO2-splitting, a large portion of the overall energy demand of the system is associated with heating the redox material from the oxidation temperature to the reduction temperature. Hence, an important measure to improve the efficiency is recuperation of sensible heat stored in the redox material. A solid-solid heat exchanger can be subject to undesirable oxygen crossover, which decreases the oxygen uptake capacity of the redox material and consequently the system efficiency. We investigate the extent of this crossover in ceria based cycles, to identify, under which conditions a heat exchanger that allows oxygen crossover can improve the system efficiency. In a thermodynamic analysis we calculate the amount of transferred oxygen as a function of the heat exchanger efficiency and show the system efficiency of such a concept. A second law analysis is applied to the model to check the feasibility of calculated points of operation. For the investigated parameter set the heat exchanger design improves the system efficiency by a factor of up to 2.1.

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Materials Design Directions for Solar Thermochemical Water Splitting

2023

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Performance analysis of operational strategies for monolithic receiver-reactor arrays in solar thermochemical hydrogen production plants

Cited by 24 publications

References 32 publications

Performance Analysis and Optimization of Solar Thermochemical Water‐Splitting Cycle with Single and Multiple Receivers

Performance Analysis and Optimization of Solar Thermochemical Water‐Splitting Cycle with Single and Multiple Receivers

Oxygen Crossover in Solid–Solid Heat Exchangers for Solar Water and Carbon Dioxide Splitting: A Thermodynamic Analysis

Materials Design Directions for Solar Thermochemical Water Splitting

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