FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2954655349> ?p ?o ?g. }

• W2954655349 abstract "The Process and Energy department of the 3mE faculty of TU Delft and the Dutch company Petrogas Gas-Systems B.V. are working together on the commissioning of a small 50 kWth Indirectly Heated Bubbling Fluidized Bed Steam Reformer (IHBFB-SR) heated by two radiant tube burners placed vertically inside the reactor. This is a new approach on indirectly heating as the heat is released from the inside to the outside, compared to existing indirectly heated gasifiers, where the heat is released from the outside to the inside. The main objective of this thesis has been to analyze the hydrodynamics and heat transfer occurring within the reactor, by applying Computational Fluid Dynamics (CFD) techniques. The analysis has been carried out using the commercial CFD software ANSYS® FLUENT. First the physical phenomena occurring within the reactor have been identified and then research was done on the models and parameters developed to describe the physical phenomena. First the hydrodynamic behaviour was evaluated and then it was looked into how the heat transfer can be coupled to the hydrodynamics in the reactor. In regards to the hydrodynamics, the Euler-Euler Two-Fluid Model (TFM) has been found to be appropriate, and the inter-phase drag coefficient was chosen as a parameter of interest. The Gidaspow drag model and the Syamlal-O-Brien modelwere compared to one another, and the solid volume fraction, pressure, axial velocity and granular temperature within the reactor were evaluated. The results were compared to the numerical solutions obtained in previous work, in order to understand which model gives a better prediction. The Gidaspow drag model was found to provide a better prediction of the core annular flow in the bed zone, and was therefore implemented in the heat transfer evaluation. In regards to the heat transfer, models were already developed for the conductive and convective heat transfer in multiphase flows. For radiation there is still a lack of rigorous coupling between radiative heat transfer and hydrodynamics in simulations of non-dilute multiphase flows. The heat transfer simulation was performed in two steps, first with only the conductive and convective heat transfer, and then with radiation added to the system. The thermal properties such as the thermal conductivity, absorption and scattering coefficient have been made dependent of the volume fraction. For the case without radiation, a small temperature increase was observed with high temperature gradients near the wall. For the case with radiation, the Discrete-Ordinates (DO) Radiation model was evaluated. From the results it can be concluded that the DO Radiation model overpredicts the radiation that is emitted and scattered from the bed, causing the bed to heat up continuously to temperatures much higher than the radiant tube. More research and experimental validation is required in order to improve the coupling of the radiative heat transfer to the hydrodynamics." @default.
• W2954655349 created "2019-07-12" @default.
• W2954655349 creator A5002950356 @default.
• W2954655349 date "2019-01-01" @default.
• W2954655349 modified "2023-09-27" @default.
• W2954655349 title "CFD Modeling of a Novel 50kWth Indirectly Heated Bubbling Fluidized Bed Steam Reformer" @default.
• W2954655349 hasPublicationYear "2019" @default.
• W2954655349 type Work @default.
• W2954655349 sameAs 2954655349 @default.
• W2954655349 citedByCount "0" @default.
• W2954655349 crossrefType "journal-article" @default.
• W2954655349 hasAuthorship W2954655349A5002950356 @default.
• W2954655349 hasConcept C116915560 @default.
• W2954655349 hasConcept C121332964 @default.
• W2954655349 hasConcept C127413603 @default.
• W2954655349 hasConcept C1633027 @default.
• W2954655349 hasConcept C18762648 @default.
• W2954655349 hasConcept C2084832 @default.
• W2954655349 hasConcept C50517652 @default.
• W2954655349 hasConcept C57879066 @default.
• W2954655349 hasConcept C62420388 @default.
• W2954655349 hasConcept C72921944 @default.
• W2954655349 hasConcept C78519656 @default.
• W2954655349 hasConcept C97355855 @default.
• W2954655349 hasConceptScore W2954655349C116915560 @default.
• W2954655349 hasConceptScore W2954655349C121332964 @default.
• W2954655349 hasConceptScore W2954655349C127413603 @default.
• W2954655349 hasConceptScore W2954655349C1633027 @default.
• W2954655349 hasConceptScore W2954655349C18762648 @default.
• W2954655349 hasConceptScore W2954655349C2084832 @default.
• W2954655349 hasConceptScore W2954655349C50517652 @default.
• W2954655349 hasConceptScore W2954655349C57879066 @default.
• W2954655349 hasConceptScore W2954655349C62420388 @default.
• W2954655349 hasConceptScore W2954655349C72921944 @default.
• W2954655349 hasConceptScore W2954655349C78519656 @default.
• W2954655349 hasConceptScore W2954655349C97355855 @default.
• W2954655349 hasLocation W29546553491 @default.
• W2954655349 hasOpenAccess W2954655349 @default.
• W2954655349 hasPrimaryLocation W29546553491 @default.
• W2954655349 hasRelatedWork W1822539992 @default.
• W2954655349 hasRelatedWork W1979200672 @default.
• W2954655349 hasRelatedWork W199999511 @default.
• W2954655349 hasRelatedWork W2004199944 @default.
• W2954655349 hasRelatedWork W2043019480 @default.
• W2954655349 hasRelatedWork W2108224456 @default.
• W2954655349 hasRelatedWork W2161252506 @default.
• W2954655349 hasRelatedWork W2163875971 @default.
• W2954655349 hasRelatedWork W2239192771 @default.
• W2954655349 hasRelatedWork W2249989506 @default.
• W2954655349 hasRelatedWork W2383655231 @default.
• W2954655349 hasRelatedWork W2387490831 @default.
• W2954655349 hasRelatedWork W2389273938 @default.
• W2954655349 hasRelatedWork W2768880507 @default.
• W2954655349 hasRelatedWork W2883455218 @default.
• W2954655349 hasRelatedWork W2921774038 @default.
• W2954655349 hasRelatedWork W2945760167 @default.
• W2954655349 hasRelatedWork W2954699715 @default.
• W2954655349 hasRelatedWork W3022368291 @default.
• W2954655349 hasRelatedWork W981350628 @default.
• W2954655349 isParatext "false" @default.
• W2954655349 isRetracted "false" @default.
• W2954655349 magId "2954655349" @default.
• W2954655349 workType "article" @default.