In this study, one type of nano-engineered heat transfer fluids: Water/AOT/Polyalphaolefin (PAO) nanoemulsion fluids are prepared, and their phase change heat transfer properties have been investigated. The Water/AOT/Polyalphaolefin nanoemulsion heat transfer fluids which are thermodynamically stable are spontaneously generated by a self-assembly of dispersed water nanodroplets The results, exp...

Dioxane and water form a positive homoazeotrope which has an azeotropic decrease in temperature sufficiently large to effect the complete r emoval, by fractional distillation through an efficient column, of water present as an impurity. The boiling-point-composition diagram, including the composition of the vapor in equilibrium with the boiling liquid, was determined. The normal boiling point o...

The connectivity index chi can be regarded as the sum of bond contributions. In this article, boiling point (bp)-oriented contributions for each kind of bond are obtained by decomposing the connectivity indices into ten connectivity character bases and then doing a linear regression between bps and the bases. From the comparison of bp-oriented contributions with the contributions assigned by ch...

Abstract A demonstration plant designed for methanol synthesis with steel mill gases was operated continuously the first time over a period of 5 weeks. The reactor represents single tube typical dimensions an industrial bundle boiling water cooling jacket and is incorporated into full loop unreacted gases. Temperature profile along axis gas composition in recycle stream are measured online. In ...

In this paper, we propose an adaptive linear approach for time series modeling and steam line leakage detection. Weighted recursive least squares (WRLS) method is used for modeling. Interpretive variables of an adaptive model should be linearly correlated to ensure a robust model. In this paper it is ensured by examining eigenvalues and eigenvectors of the principal component analysis (PCA). Th...

We report a novel boiling heat transfer (NBHT) in reduced graphene oxide (RGO) suspended in water (RGO colloid) near critical heat flux (CHF), which is traditionally the dangerous limitation of nucleate boiling heat transfer because of heater failure. When the heat flux reaches the maximum value (CHF) in RGO colloid pool boiling, the wall temperature increases gradually and slowly with an almos...

Boiling is the most common means of treating water in the home and the benchmark against which alternative point-of-use water treatment options must be compared. In a 5-week study in rural Guatemala among 45 households who claimed they always or almost always boiled their drinking water, boiling was associated with a 86.2% reduction in geometric mean thermotolerant coliforms (TTC) (N = 206, P <...

Recently, the U.S. nuclear industry has proposed replacing current volumetric and/or surface examinations of certain components in commercial nuclear power plants, as required by the American Society of Mechanical Engineers Boiler and Pressure Vessel Code Section XI, “Inservice Inspection of Nuclear Power Plant Components,” with a simpler visual testing (VT) method. The advantages of VT are tha...

The paper discusses an application of the Computational Fluid Dynamics (CFD) method to support the development and validation of a computationally-affordable method named Effective Convectivity Model (ECM) for simulation of turbulent natural convection heat transfer and phase changes in a decay-heated corium pool in the Boiling Water Reactor (BWR) lower head. The CFD method simulations enable d...

In this paper, we present two feature extraction techniques for the classification of ultrasonic NDE signals acquired from weld inspection regions of boiling water reactor piping of nuclear power plants. The classification system consists of a pre-processing block that extracts features from the incoming patterns, and of an artificial neural network that assigns the computed features to a parti...