Numerical Study of the Flow and Heat Transfer in Supercritical Water Based Fluidized Bed Reactor

Numerical Study of the Flow and Heat Transfer in Supercritical Water Based Fluidized Bed Reactor

Zeng, C.

De Jong, W. (mentor)
Harinck, J. (mentor)

Mechanical, Maritime and Materials Engineering

Sustainable Process and Energy Technology

Energy Technology Section

2015-09-29

Public version. This version is only limited to the summary. Supercritical water gasification (SCWG) is a novel process for the thermochemical conversion of wet organic waste to gas and minerals. It is an alternative to the anaerobic digestion process, dewatering followed by drying and incineration and conventional dry gasification. Its advantages include no requirement for drying, higher syngas yield and much shorter residence time. From societal aspect, SCWG offers a solution to environmental problems caused by wet waste and fossil fuels, through the production of renewable gas and minerals. TU Delft and Gensos B.V. collaborate in fundamental research on supercritical gasification using a fluidized bed reactor concept. This study focuses on the hydrodynamics and heat transfer of the fluidized bed reactor of the supercritical gasification process. It aims to develop CFD models that can correctly predict the main heat transfer and fluidization phenomena in the supercritical fluidized bed reactor. CFD models are developed to conduct numerical studies of single-phase heat transfer without fluidization, multi-phase fluidization without heat transfer and fluidization with heat transfer. The CFD models are validated by using experimental data from Yamagata, Mokry and Lu et al.

supercritical water gasification
CFD
heat transfer
fluidization

http://resolver.tudelft.nl/uuid:f8b6c47c-b08e-46d7-9358-488602c50973

2020-09-01

Student theses

master thesis

(c) 2015 Zeng, C.