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Computational fluid dynamics (CFD) simulations have been conducted for different configurations of pre-designed multiple hydrokinetic turbines. The turbines are modeled physically within the fluid domain instead of low fidelity actuator lines or actuator disk modeling approaches. The turbulence model, k-ω Shear Stress Transport (SST) was employed to resolve turbulent flow field. The primary focus of this study is to investigate transient behavior of multiple turbines and providing solutions to enhance downstream turbine performance in close proximity to the upstream turbine wake.

A mercury detection system was built and tested to help assess the mercury absorption ability of synthetic disks, made of Kapton polyimide film, under simulated flue gas conditions at different temperature levels. These synthetic disks would be part of a continuous mercury monitoring system developed by UHV, Inc. and the Lehigh University Energy Research Center. Evaluation of the disks was based on mercury absorption efficiency, calculated from the difference in mercury concentration before and after placing the discs into the detection system.

Computational fluid dynamics simulations are conducted for multicomponent fluid flows over banks of hollow fiber membranes. The hollow fiber membrane systems is considered here for gas separation applications. Separation of carbon dioxide (CO2) from methane (CH4) is studied using hollow fiber membranes packed in different arrangements. The membrane surface is considered as a functional surface where the mass flux and concentration of each species are coupled and are determined as a function of the local partial pressures, the permeability, and the selectivity of the membrane.