Radiation-based model reduction for the optimization of high temperature tube bundle reactors: Synthesis of hydrogen cyanide

Liesche, Georg; Sundmacher, Kai

doi:10.1016/j.compchemeng.2019.05.007

Cited by 3 publications

(9 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This model decomposition is advantageous because shadow effects among tubes and associated flow patterns are expected to prevail over axial transport processes for side-fired furnace designs. At first, a purely radiation-based tube bundle furnace model is applied that was developed in a previous study (Liesche and Sundmacher, 2019) where temperature distribution must be assumed (Figure 1C). In the third step, the Navier-Stokes equations for the furnace cross section are solved using a computational fluid dynamics (CFD) model as depicted in Figure 1D.…”

Section: Tube-bundle Furnace Modelmentioning

confidence: 99%

“…Based on the single reforming tube simulations, a radiationbased furnace model is adopted for the application of steam reforming (Liesche and Sundmacher, 2019). This twodimensional furnace model is based on two fundamental assumptions for the furnace: convective heat transfer is neglected and two flue gas temperatures-within the bundle and in between the tube bundle and the furnace walls-are required.…”

Section: Radiation-based Furnace Modelmentioning

confidence: 99%

“…It is important to note that wall emissivities are irrelevant if near-adiabatic walls can be assumed. A detailed derivation of the resistance expressions can be found in Liesche and Sundmacher (2019). The gas emissivity ε g is calculated using Lambert-Beer's law (VDI-Gesellschaft Verfahrenstechnik und Chemieingenieurwesen, 2013):…”

Section: Radiation-based Furnace Modelmentioning

confidence: 99%

“…The configuration denoted as B stems from the arrangement that is typically applied in BMA reactors which were investigated in a separate study (Liesche and Sundmacher, 2019). It consists of 14 tubes, arranged in two rows of five enclosing one row of four tubes.…”

Section: Parametrization Of Geometrymentioning

confidence: 99%

“…Many sources indicate that radiation is responsible for 95% of total heat transfer (Yu et al, 2006;Olivieri and Vegliò, 2008;Tran et al, 2017). It was shown recently, however, that this assumption does not hold under any circumstances and that convection may indeed play a significant role at reduced furnace temperatures and in high convection zones of the furnace (Liesche and Sundmacher, 2019).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Optimal Tube Bundle Arrangements in Side-Fired Methane Steam Reforming Furnaces

et al. 2020

Self Cite

View full text Add to dashboard Cite

Steam methane reforming processes represent the economically most competitive processes for the production of synthesis gas and hydrogen despite their high energy costs. Although there is a strong need for highly resource-efficient production, literature on the optimal design of reformers remains scarce due to the inherently high complexity of these processes. This contribution addresses design aspects of reformers for the case study of a side-fired reformer. Based on a two-dimensional furnace representation heat transfer and the optimal tube bundle arrangement for a fixed furnace chamber are investigated using simulation-based parametric study with both a lean radiation-based model and a computational fluid dynamics model that enables the consideration of fuel efficiency. Radiative heat transfer prevails in the reformer on the furnace side and inter-tube distances of at least three diameters are optimal within the investigated design space. The line arrangement of reformer tubes is beneficial in terms of total heat transferred, fuel efficiency as well as the homogeneity of the tube surface temperatures. These findings pave the way for further studies such as three-dimensional design aspects.

show abstract

Section: Tube-bundle Furnace Modelmentioning

confidence: 99%

Section: Radiation-based Furnace Modelmentioning

confidence: 99%

Section: Radiation-based Furnace Modelmentioning

confidence: 99%

Section: Parametrization Of Geometrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Optimal Tube Bundle Arrangements in Side-Fired Methane Steam Reforming Furnaces

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

Numerical investigation of combined effects of radiation and convection heat transfer from tube banks placed in a participating medium

Sertel

Altaç

2023

Numerical Heat Transfer, Part A: Applications

View full text Add to dashboard Cite

On the Importance of Model Selection for CFD Analysis of High Temperature Gas-Solid Reactive Flow; Case Study: Post Combustion Chamber of HIsarna Off-Gas System

et al. 2023

View full text Add to dashboard Cite

In this paper a CFD analysis of HIsarna off-gas system for post combustion of CO-H2-carbon particle mixture is presented to evaluate the effect of different sub-models and parameters on the accuracy of predictions and simulation time. The effects of different mesh type, mesh grid size, radiation models, turbulent models, kinetic mechanism, turbulence chemistry interaction models, including and excluding gas-solid reactions, number of reactive solid particles are investigated in detail. Based on the accuracy of the predictions and agreement with counterpart measured values, the best combination is selected and conclusions are derived. It was found that radiation and turbulence chemistry interaction model have a major effect on the temperature and composition profile prediction along the studied off-gas system, compared to the variations in other models. The effect of these two models becomes even more evident when the temperature and fuel content of the flue gas are high.

show abstract

Radiation-based model reduction for the optimization of high temperature tube bundle reactors: Synthesis of hydrogen cyanide

Cited by 3 publications

References 30 publications

Optimal Tube Bundle Arrangements in Side-Fired Methane Steam Reforming Furnaces

Optimal Tube Bundle Arrangements in Side-Fired Methane Steam Reforming Furnaces

Numerical investigation of combined effects of radiation and convection heat transfer from tube banks placed in a participating medium

On the Importance of Model Selection for CFD Analysis of High Temperature Gas-Solid Reactive Flow; Case Study: Post Combustion Chamber of HIsarna Off-Gas System

Contact Info

Product

Resources

About