Wyniki wyszukiwania:

This paper quantifies the influence of Al2O3 nanoparticles on the pool boiling performance of R134a/polyolester mixtures on a roughened, horizontal, flat surface. Nanofluids are liquids that contain dispersed nano-size particles. A lubricant based nanofluid (nanolubricant) was made by suspending nominally, 10 nm diameter Al2O3 particles in a synthetic ester to roughly a 1.6 % volume fraction. The nanoparticles enhanced the boiling heat transfer relative to that for R134a/polyolester mixtures without nanoparticles for the three lubricant mass fractions that were tested.

The purpose of this study is to use a NIST fluorescence based measurement technique to add to the existing data on aqueous diesel adsorption to solid surfaces and to support the development of flushing and contamination models. In a previous study the diesel excess surface density was measured on an oxidized copper surface. The present study expands the database to diesel attachment to a polyvinyl chloride (PVC) surface and to an iron surface.

This report summarizes the measurement results and recommended procedures for responding to building plumbing system contamination incidents and restoring the water system to safe operation. The recommendations are based on analysis of the results of a measurement and modelling research project investigated contamination and decontamination issues related to building plumbing systems.