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Aerodynamic Isolation of Open Refrigerated Vertical Display Cases using Air Curtains
No full textThis chapter presents an experimental study on the effects of some of the most important variables that affect the infiltration rate in open refrigerated vertical display cases at steady operation. The variables were defined in dimensionless forms and were categorized in two groups. The goal was to examine the cross-effects of the first group (primary variables) by performing tests on the permutation of the variables, and to obtain some correction functions that contain the effects of the (secondary) variables thought to have smaller impact on infiltration. Tracer gas method, a new means to measure infiltration rate, is described and compared with other conventional methods. Most variables showed noticeable impacts on infiltration either linearly or non-linearly, some of whom did not show very well-defined patterns with infiltration, which indicates there are significant cross-effects among the variables. Others such as temperature difference and relative humidity showed no or negligible effects on infiltration
Transport Properties of Amine/Carbon Dioxide Reactive Mixtures and Implications to Carbon Capture Technologies
No full textThe structure and transport properties of physisorbed and chemisorbed CO2 in model polyamine liquids (hexamethylenediamine and diethylenetriamine) are studied via molecular dynamics simulations. Such systems are relevant to CO2 absorption processes where nonaqueous amines are used as absorbents (e.g., when impregnated or grafted onto mesoporous media or misted in the gas phase). It is shown that accounting for the ionic speciation resulting from CO2 chemisorption enabled us to capture the qualitative changes in extent of absorption and fluidity with time that are observed in thermogravimetric experiments. Simulations reveal that high enough concentration of reacted CO2 leads to strong intermolecular ionic interactions and the arrest of molecular translations. The transport properties obtained from the simulations of the ionic speciated mixtures are also used to construct an approximate continuum-level model for the CO2 absorption process that mimics thermogravimetric experiments
Kettering University Interim Monitoring Report to the HLC
No full textThis Interim Report provides a follow-up to the HLC Report to Kettering University in April 2014 and the subsequent request for a monitoring report. That request from July 8, 2014, required the University to submit an Interim Report due on December 1, 2015. The report addressed institutional and academic oversight of teaching effectiveness, faculty workload and related expectations, and assessment and retention across all modes of delivery
Method and Apparatus for Treating Centralized Pain
Get PDFA method for alleviating centralized pain in human subjects includes assessing the brain of a subject suffering from pain, diagnosing abnormal brain function associated with centralized pain, locating at least one area of abnormal brain function associated with the centralized pain, and alleviating the abnormal brain function by applying a cortical stimulation signal to tissues corresponding to the at least one area of abnormal brain function
Studies of separation performance of silanized silica gel for simulated distillation
No full textWe present the results of investigations of the chromatographic (sorptive) properties of silanized silica gel as a stationary phase for gas chromatography used for simulated distillation. Commercially available silanized sorbent (particle diameter range 63-200 μm, average pore size 60 Å) was sieved to obtain the 80-100 mesh fraction (180-150 μm). The obtained results revealed that silanized silica gel allows complete separation of a mixture of n- and iso-alkanes in the C1 -C7 range. Such a separation is achieved with a temperature program starting with an initial temperature of 50˚C, which is advantageous because the GC oven does not have to be cooled below room temperature. Using temperature programming with a final temperature of 300˚C ensures separation and elution of all mixture components from C1 to n-C28 in one run. The paper confirms applicability of silanized silica gel as a stationary phase for the investigation of distillation temperature distribution of gasoline and diesel fuel based on the simulated distillation procedure according to ASTM D2887. The deviations of individual points of distillation curve obtained using ASTM D2887 and columns packed with silanized silica gel were within the reproducibility range of the standard procedure. This article is protected by copyright. All rights reserved