Optimizing the Temperature of Hot outlet Air of Vortex Tube using Taguchi Method.

AbstractVortex tube produces hot and cold streams from inlet pressurized gas. Though mainly used for spot cooling purposes, it may also be used for heating/pre-heating applications. In this work, the effect of - inlet air pressure, hot tube length, hot tube internal diameter, orifice diameter, and nozzle diameter, on hot-outlet air temperature is analyzed. Taguchi's parameter design approach is used to optimize the response. Above parameters are considered at three levels each. L-27 Orthogonal Array is used for experimentation with two replicates. From the ANOVA table, all the parameters considered are found to be statistically significant. Relevant graphs are drawn; optimum response value at optimal factor levels is predicted. Through confirmatory test, experimental results are validated

SIMULTANEOUS OPTIMIZATION OF HOT AND COLD OUTLET AIR TEMPERATURES OF VORTEX TUBE USING GREY RELATIONAL ANALYSIS AND TAGUCHI METHOD

Vortex tube separates inlet pressurized gas into hot and cold streams to let out at the two ends. It is mainly used for spot cooling purposes. In the hitherto studies on vortex tube, either cold temperature or temperatures difference of outlet gas was considered the response variable. In this work, suggesting that vortex tube can also be used for heating applications, the two response variables viz., cold-outlet air temperature and hot-outlet air temperature are optimized simultaneously using Taguchi method and grey relational analysis. Various input controllable parameters / factors may be conceived, the values (levels) of whom may affect the response variables. Five controllable parameters with three levels each and L-27 Orthogonal Array are used for experimentation in the present work. Grey Relational Grades are computed. Except hot-tube Length, all the parameters considered are found significant from ANOVA table. Through confirmatory test, experimental results are validated

Hydroxy-assisted catalyst-free Michael addition-dehydroxylation of Baylis-Hillman adducts in poly(ethylene glycol)

Intramolecular hydrogen bonding facilitates nucleophilic addition of sulfones to Baylis-Hillman adducts in a single step to realize the substituted allyl sulfones. The reaction is performed in PEG (400 MW) as solvent, which allows easy solvent recycling

Synthesis and conformational studies of 3,4-di-O-acylated furanoid sugar amino acid-containing analogs of the receptor binding inhibitor of vasoactive intestinal peptide

Structural analysis of the di-O-caprylated Gaa-containing analog of the receptor binding inhibitors of vasoactive intestinal peptide by various NMR techniques and constrained molecular dynamics (MD) simulation studies established a well-defined β-turn structure in DMSO-d6 with an intramolecular hydrogen bond between TyrNH → MetCO

Palladium-catalyzed addition of hydroxylamine derivatives to Baylis-Hillman acetate adducts

The first use of hydroxylamine derivatives as the aminoxy equivalent of nucleophiles in palladium catalyzed addition to Baylis-Hillman acetate adducts is described. The reaction proceeds smoothly to give the substituted allyloxy amines in good yield and selectivity