Effect of reactor geometry on the temperature distribution of hydrogen producing solar reactors

Costandy, Joseph; Ghazal, Nour El; Mohamed, Mohamed T.; Menon, Akanksha K.; Shilapuram, Vidyasagar; Özalp, Nesrin

doi:10.1016/j.ijhydene.2012.02.193

Cited by 30 publications

(14 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Solar cracking of methane: (9) and other light hydrocarbons has been investigated considerably in the past years [33][34][35][36][37][38][39][40][41][42]. Methane cracking takes place through an initiation reaction:…”

Section: Reactors/receivers For Solar Crackingmentioning

confidence: 99%

Methodologies for the Design of Solar Receiver/Reactors for Thermochemical Hydrogen Production

Murmura

Annesini

2020

Processes

View full text Add to dashboard Cite

Thermochemical hydrogen production is of great interest due to the potential for significantly reducing the dependence on fossil fuels as energy carriers. In a solar plant, the solar receiver is the unit in which solar energy is absorbed by a fluid and/or solid particles and converted into thermal energy. When the solar energy is used to drive a reaction, the receiver is also a reactor. The wide variety of thermochemical processes, and therefore of operating conditions, along with the technical requirements of coupling the receiver with the concentrating system have led to the development of numerous reactor configurations. The scope of this work is to identify general guidelines for the design of solar reactors/receivers. To do so, an overview is initially presented of solar receiver/reactor designs proposed in the literature for different applications. The main challenges of modeling these systems are then outlined. Finally, selected examples are discussed in greater detail to highlight the methodology through which the design of solar reactors can be optimized. It is found that the parameters most commonly employed to describe the performance of such a reactor are (i) energy conversion efficiency, (ii) energy losses associated with process irreversibilities, and (iii) thermo-mechanical stresses. The general choice of reactor design depends mainly on the type of reaction. The optimization procedure can then be carried out by acting on (i) the receiver shape and dimensions, (ii) the mode of reactant feed, and (iii) the particle morphology, in the case of solid reactants.

show abstract

Section: Reactors/receivers For Solar Crackingmentioning

confidence: 99%

Methodologies for the Design of Solar Receiver/Reactors for Thermochemical Hydrogen Production

Murmura

Annesini

2020

Processes

View full text Add to dashboard Cite

show abstract

“…Since the early work by Meier [18] in 1996 (focused on hydrogen production with ferrites thermochemical cycles), the number of studies based on CFD simulations have significantly increased over the last years. CFD can be used to guide the design process by predicting results of temperature fields, heat flux distributions, and other variables of interest, and can be used for the main reactor types such as particle reactors, volumetric reactors and tubular reactors [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…One of the most demanding issues in terms of computational times is radiation modelling. A set of different radiation models can be found in the literature for solar reactor modeling, being one of the most considered the Discrete Ordinate model (DO) [21][22][23][24][25]. In such studies, the boundary condition for the radiation flux is typically defined as a uniform or Gaussian distribution with a unidirectional vector [17,[21][22][23][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…A set of different radiation models can be found in the literature for solar reactor modeling, being one of the most considered the Discrete Ordinate model (DO) [21][22][23][24][25]. In such studies, the boundary condition for the radiation flux is typically defined as a uniform or Gaussian distribution with a unidirectional vector [17,[21][22][23][26][27][28]. However, if the radiation flux must consider the different directions of rays (which is the real case when the radiation flux is coming from a parabolic dish or a heliostat field), it is more advisable to use the Monte Carlo model (MC), as it is a more practical approach for implementing the ray directions [27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multi-Tubular Reactor for Hydrogen Production: CFD Thermal Design and Experimental Testing

Tapia

González-Pardo²,

Iranzo

et al. 2019

Processes

View full text Add to dashboard Cite

This study presents the Computational Fluid Dynamics (CFD) thermal design and experimental tests results for a multi-tubular solar reactor for hydrogen production based on the ferrite thermochemical cycle in a pilot plant in the Plataforma Solar de Almería (PSA). The methodology followed for the solar reactor design is described, as well as the experimental tests carried out during the testing campaign and characterization of the reactor. The CFD model developed for the thermal design of the solar reactor has been validated against the experimental measurements, with a temperature error ranging from 1% to around 10% depending on the location within the reactor. The thermal balance in the reactor (cavity and tubes) has been also solved by the CFD model, showing a 7.9% thermal efficiency of the reactor. CFD results also show the percentage of reacting media inside the tubes which achieve the required temperature for the endothermic reaction process, with 90% of the ferrite pellets inside the tubes above the required temperature of 900 °C. The multi-tubular solar reactor designed with aid of CFD modelling and simulations has been built and operated successfully.

show abstract

“…Costandy et al [9] developed different struts of spherical and cylindrical solar reactor to investigate the effect of reactor geometry on the temperature distribution and heat loss inside the reactors. Thomey et al [10] have developed a multi-chamber solar porous media reactor design for the decomposition of sulphuric acid.…”

Section: Introductionmentioning

confidence: 99%

Thermal Stress Analysis of Solar Thermochemical Reactor Using Concentrated Solar Radiation

Zhang¹,

Pang²,

Luo³

et al. 2018

Kms

View full text Add to dashboard Cite

show abstract

Effect of reactor geometry on the temperature distribution of hydrogen producing solar reactors

Cited by 30 publications

References 29 publications

Methodologies for the Design of Solar Receiver/Reactors for Thermochemical Hydrogen Production

Methodologies for the Design of Solar Receiver/Reactors for Thermochemical Hydrogen Production

Multi-Tubular Reactor for Hydrogen Production: CFD Thermal Design and Experimental Testing

Thermal Stress Analysis of Solar Thermochemical Reactor Using Concentrated Solar Radiation

Contact Info

Product

Resources

About