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Search Publications by: Mark A. Kedzierski (Assoc)

Displaying 151 - 175 of 259

Measurement and Modeling of Turbulent Flow in Water Supply Systems and Its Effect on Contaminant Transport

November 4, 2007

Author(s)

Stephen J. Treado, Nicos Martys, Mark A. Kedzierski, Stephanie S. Watson, Kenneth D. Cole

This paper describes the results of a measurement and modeling research project investigating the transport, accumulation and removal of contaminants from within water supply systems, including piping, fittings and fixtures. The traditional approach for

Horizontal Convective Boiling of Pure and Mixed Refrigerants Within a Micro-Fin Tube

October 4, 2007

Author(s)

Mark A. Kedzierski

Effect of CuO Nanolubricant on R134a Pool Boiling Heat Transfer with Extensive Measurement and Analysis Details

October 1, 2007

Author(s)

Mark A. Kedzierski

This paper quantifies the influence of CuO nanoparticles on the 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

Effect of Lubricant on R410A Horizontal Flow Boiling

September 27, 2007

Author(s)

N N. Sawant, Mark A. Kedzierski, J S. Brown

The paper experimentally quantified the effect of lubricant on horizontal flow boiling of R410A. This was accomplished by first establishing a baseline by measuring the convective boiling heat transfer performance of pure R410A. The heat transfer

Effect of CuO Nanoparticle Concentration on R134a/Lubricant Pool Boiling Heat Transfer With Extensive Analysis

September 20, 2007

Author(s)

Mark A. Kedzierski

This paper quantifies the influence of CuO nanoparticle concentration on the boiling performance of R134a/polyolester mixtures on a roughened, horizontal flat surface. Nanofluids are liquids that contain dispersed nano-size particles. Two lubricant based

Effect of Refrigerant Oil Additive on R134a and R123 Boiling Heat Transfer Performance

January 1, 2007

Author(s)

Mark A. Kedzierski

This paper investigates the effect that an additive had on the boiling performance of an R134a/polyolester lubricant (POE) mixture and an R123/naphthenic mineral oil mixture on a roughened, horizontal flat surface. Both pool boiling heat transfer data and

Contamination and Decontamination of Building Plumbing Systems

September 25, 2006

Author(s)

Stephen J. Treado, Mark A. Kedzierski, Stephanie S. Watson, Kenneth D. Cole

The quality of drinking water has always been a subject of interest. In fact, a stable and secure supply of clean drinking water is a hallmark of modern society. Recently, new concerns have arisen regarding the potential occurrence of intentional or

Development of a Fluorescence Based Measurement Technique to Quantify Water Contaminants at Pipe Surfaces During Flow

September 1, 2006

Author(s)

Mark A. Kedzierski

This paper provides a detailed account of the development of a fluorescence based measurement technique for measuring the mass of contaminant on solid surfaces in the presence of water flow. A test apparatus was design and developed for the purpose of

Influence of Concentration and Additives on R123/Paraffinic Material Oil Boiling Heat Transfer Performance (NISTIR 7336)

September 1, 2006

Author(s)

Mark A. Kedzierski, D H. Han

This paper investigates the effect that oil concentration had on the boiling performance of an R123/paraffinic mineral oil mixture on a roughened, horizontal flat surface. For all compositions, the lubricant caused a heat transfer degradation relative to

Report of Phase One Measurement and Analysis of Building Water System Contamination and Decontamination

July 3, 2006

Author(s)

Stephen J. Treado, Mark A. Kedzierski, Stephanie S. Watson, Dale P. Bentz, Nicos Martys, Kenneth D. Cole

This report describes the results of the first phase of a research project to evaluate how contaminants accidentally or intentionally introduced into the water supply might accumulate in building plumbing systems, and how these contaminants might be

A Comparison of R245fa Pool Boiling Measurements to R123, and R245fa/Isopentane on a Passively Enhanced, Horizontal Surface

April 3, 2006

Author(s)

Mark A. Kedzierski

This study presents pool boiling heat transfer measurements for R245fa, R123 and a mixture of R245fa and isopentane on a flattened passively enhanced low-pressure boiling surface. Possibly because the enhanced surface was flattened from a round tube, its

Horizontal Convective Boiling of Refrigerants and Refrigerant Mixtures Within a Micro-Fin Tube

July 1, 2005

Author(s)

L J. Hamilton, Mark A. Kedzierski, M P. Kaul

This paper presents local convective boiling measurements in a micro-fin tube for four pure refrigerants: R22, R32, R125, and R134a; and four refrigerant mixtures: R410B (R32/125, 45/55 % mass), R32/R134a (28/72 % and 30/70% mass) and, R407C (R32/125/134a

Effect of Bulk Lubricant Concentration on the Excess Surface Density During R134a Pool Boiling with Extensive Measurement and Analysis Details

June 1, 2005

Author(s)

Mark A. Kedzierski

This paper investigates the effect that the bulk lubricant concentration has on the non-adiabatic lubricant excess surface density on a roughened, horizontal flat pool-boiling surface. Both pool boiling heat transfer data and lubricant excess surface