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

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...

Turbulence Modeling for Heat Transfer to Supercritical Pipe Flows

In the present work, a comprehensive review on different mechanisms affecting heat transfer characteristics of supercritical flows is carried out. The physical mechanism of heat transfer is then further investigated using inhouse DNS data. In addition, RANS simulations of a heated vertical pipe with supercritical CO2 are carried out using...

Experimental Validation of a New Ammonia/Water Absorption Model in a Minichannel Annulus

In this study two mathematical models are developed to evaluate the performance of ammonia/water absorption and desorption in a minichannel. The models evaluate pressure drop, heat transfer and mass transfer inside the minichannel, including the effect of surface tension and flow patterns.

Internal Heat Exchange in a Concentric Tray Heat Integrated Distillation Column (CT-HIDiC)

The HIDiC is a concept of distillation to increase the energy efficiency. The HIDiC combines the advantages of the heat pump assisted column with the diabatic column. The rectification section and stripping section are separated and the rectification section is placed inside the stripping section. By compressing the flow from the stripping...