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Search Publications by: Mark O. McLinden (Fed)

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Displaying 26 - 50 of 102

The hunt for refrigerant blends to replace R-134a

August 1, 2019
Author(s)
Ian H. Bell, Piotr A. Domanski, Gregory T. Linteris, Mark O. McLinden
We investigated refrigerant blends as possible low GWP (global warming potential) alternatives for R-134a in an air-conditioning application. We carried out an extensive screening of the binary, ternary, and four-component blends possible among a list of

COMPOSITION DETERMINATION OF LOW-PRESSURE GAS-PHASE MIXTURES BY 1H NMR SPECTROSCOPY

March 4, 2019
Author(s)
Chris Suiter, Mark O. McLinden, Thomas J. Bruno, Jason A. Widegren
1H NMR spectroscopy was used to analyze vapor-phase mixtures of methane and propane at low to moderate pressures. The mixtures were prepared gravimetrically and had low uncertainty in their composition. The primary mixture used for this work had a methane

Low-GWP Alternative Refrigerant Blends for HFC-134a

September 7, 2018
Author(s)
Piotr A. Domanski, Mark O. McLinden, Ian H. Bell, Gregory T. Linteris
The goal of this study was to identify non-flammable, non-toxic, low global-warming-potential (GWP) replacements for HFC-134a in an air-conditioning system that would maintain the energy efficiency and capacity. A prior exhaustive work demonstrated that

Review of Refrigerants Evolution

June 20, 2018
Author(s)
Piotr A. Domanski, Mark O. McLinden, Andrei F. Kazakov, J S. Brown, Riccardo Brignoli, Jaehyeok Heo, Janusz Wojtusiak
The presentation discusses the application of refrigerants from the beginnings of ‘artificial cold’ in the era of industrial revolution to the currently used fluids, and the refrigerant options in response to environmental concerns. The outlook for new

Low-GWP Refrigerants; Options and Issues

April 11, 2018
Author(s)
Piotr A. Domanski, Riccardo Brignoli, J S. Brown, Andrei F. Kazakov, Mark O. McLinden
This research explored the possibilities for refrigerants having low global warming potential (GWP) with a particular focus on high-pressure applications. The search for suitable refrigerants relied on screening of a comprehensive database using filters of

LOW-GWP REFRIGERANTS FOR MEDIUM AND HIGH-PRESSURE APPLICATIONS

September 19, 2017
Author(s)
Piotr A. Domanski, Riccardo Brignoli, S J. Brown, Andrei F. Kazakov, Mark O. McLinden
The merits of an alternative refrigerant are established based on many attributes including environmental acceptance, chemical stability in the refrigeration system, low toxicity, flammability, efficiency and volumetric capacity. In an earlier work, these

LOW-GWP REFRIGERANTS: PERFORMANCE ASSESSMENT AND SELECTION TRADEOFFS

April 23, 2017
Author(s)
Piotr A. Domanski, Riccardo Brignoli, J S. Brown, Andrei F. Kazakov, Mark O. McLinden
The merits of an alternative refrigerant are established based on many attributes including environmental acceptance, chemical stability in the refrigeration system, low toxicity, flammability, efficiency and volumetric capacity. In an earlier work, these

Limited options for low-global-warming-potential refrigerants

February 17, 2017
Author(s)
Mark O. McLinden, J S. Brown, Riccardo Brignoli, Andrei F. Kazakov, Piotr A. Domanski
Hydrofluorocarbons, currently used as refrigerants in air-conditioning systems, are potent greenhouse gases, and their contribution to climate change is projected to increase. Future use of the hydrofluorocarbons will be phased down and, thus, replacement

Thermodynamic Properties of 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone: Vapor Pressure, (p, ?, T) Behavior, and Speed of Sound Measurements, and Equation of State

September 30, 2015
Author(s)
Mark O. McLinden, Richard A. Perkins, Eric W. Lemmon, Tara J. Fortin
We report comprehensive thermodynamic property measurements of 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone. The p–ρ–T behavior was measured from T = (225 to 470) K with pressures up to 36 MPa using a two-sinker densimeter. These

Hitting the bounds of chemistry: Limits and tradeoffs for low-GWP refrigerants.

August 19, 2015
Author(s)
Mark O. McLinden, J. Steven Brown, Andrei F. Kazakov, Piotr A. Domanski
We explore the possibilities for low-GWP refrigerants through two approaches. First, we explore the performance of hypothetical refrigerants to define the limits of what is allowed by thermodynamics. In the second approach, we apply property estimation

CHAPTER 2: Experimental Techniques 1: Direct Methods

December 17, 2014
Author(s)
Mark O. McLinden
Fluid density is mass per unit volume, and the experimental techniques described in this chapter involve, in one way or another, a clearly defined mass and volume. For this reason, we describe them as “direct” methods. This is in contrast to the vibrating

CHAPTER 4: Density Standards and Traceability

December 17, 2014
Author(s)
Mark O. McLinden
Most instruments for measuring fluid density are not absolute instruments—they must be calibrated with one or more fluids of known density. The selection of appropriate calibration fluids is vital to achieving low uncertainty in a measurement. Also

Possibilities and Tradeoffs for Low-GWP Refrigerants

January 19, 2014
Author(s)
Mark O. McLinden
presentation at ASHRAE Winter Conference: We explore the possibilities for refrigerants having low global warming potential (GWP) through two distinct, but complementary, approaches. In an “exploration of thermodynamic space” we define the limits of what