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Buildings and construction

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Displaying 476 - 500 of 3889

Lessons Learned from Spray Polyurethane Foam Emission Testing using Micro-chambers

October 16, 2016
Author(s)
Dustin Poppendieck, Mengyan Gong, Lauren E. Lawson
Both governmental agencies and the SPF industry consortium have sought more information on potential chemical emissions from SPF to better understand any potential occupant exposures and health impacts. This research was designed to contribute to the

Net-Zero Energy Residential Building Component Cost Estimates and Comparisons

October 4, 2016
Author(s)
Joshua D. Kneifel, Eric G. O'Rear
Homeowners and builders have increasingly strived to build low energy homes. As building materials, equipment, and methods have improved and renewable energy systems have become commonplace, the goal of net-zero energy homes has become technologically

Extinguishment and Enhancement of Propane Cup-Burner Flames by Halon and Alternative Agents

September 20, 2016
Author(s)
Gregory T. Linteris, Fumiaki Takahashi, Viswanath R. Katta, Valeri I. Babushok
Computations of cup-burner flames in normal gravity have been performed to reveal the combustion inhibition and enhancement by the CF3Br (halon 1301) and potential alternative fire-extinguishing agents (C2HF5, C2HF3Cl2, and C3H2F3Br). The time-dependent

Gas-Phase Interactions of Phosphorus Containing Compounds with Cup-Burner Diffusion Flames

September 20, 2016
Author(s)
Gregory T. Linteris, Fumiaki Takahashi, Viswanath R. Katta, Valeri I. Babushok
The effects of phosphorus-containing compounds (PCC) on the extinguishment and structure of methane-air coflow diffusion flames, in the cup-burner configuration, have been studied computationally. Dimethyl methylphosphonate (DMMP), trimethyl phosphate (TMP

NIST Programs to Advance Accurate, Internationally-Recognized Stack Emissions Measurements

September 15, 2016
Author(s)
Aaron Johnson, Iosif Isaakovich Shinder, Rodney A. Bryant, JohnPaul R. Abbott, Keith A. Gillis, Joey Boyd, James Filla, Michael R. Moldover
Accurate flow measurements are essential to quantify the amount of greenhouse gases (GHGs) and other pollutants emitted from power plant stacks. Although protocols have been developed, the uncertainty of stack flow measurements has not been documented. 

Characterizing Indoor Air Quality Performance Using a Graphical Approach

September 14, 2016
Author(s)
Kevin Y. Teichman, Andrew Persily, Steven Emmerich
In this paper, we describe and demonstrate an approach to illustrate the performance of buildings with respect to indoor air quality (IAQ). In the absence of an adequate or agreed-upon IAQ metric(s), we describe a graphical approach to presenting IAQ

Optimized Air-to-Refrigerant Heat Exchanger With Low-GWP Refrigerants

August 20, 2016
Author(s)
Piotr A. Domanski, Hong Hyun Cho
This paper presents an analytical evaluation of the performance of low-GWP refrigerants in a finned-tube evaporator used for residential cooling applications. The study employed an evolutionary-computation optimization module to examine the effect of a

Evaluating the Initial Field Performance of HVAC-Cx for Air Handling Units

August 17, 2016
Author(s)
Natascha S. Milesi-Ferretti, Michael A. Galler, Steven T. Bushby
Automated commissioning tools facilitate the ongoing commissioning process to improve occupant comfort, ensure the persistence of correct system operation, and reduce energy consumption. These tools decrease the time and the skill level required to carry

Thermal Exposure Sensor for Fire Fighters - full-Scale Performance Experiments

July 26, 2016
Author(s)
Nelson P. Bryner, Atul Deshmukh, John Casali, Jeff Lancaster, Roy A. McLane
During structural fire fighting suppression operations, fire fighters wear protective gear to insulate them from the high temperature environment including hot combustion gases, burning surfaces, and thermal radiation. Current turnout gear insulates the

Thermal Exposure Sensor for Fire Fighters - Laboratory-Scale Performance Experiments

July 26, 2016
Author(s)
Nelson P. Bryner, Atul Deshmukh, John Casali, Jeff Lancaster, Roy A. McLane
During structural fire fighting operations, fire fighters wear protective gear to insulate them from high temperature environments, including hot combustion gases, burning surfaces, and thermal radiation. Current turnout gear insulates the fire fighter to

Influence of Hydrocarbon Moiety of DMMP on Flame Propagation in Lean Mixtures

July 7, 2016
Author(s)
Gregory T. Linteris, Valeri I. Babushok, Viswanath R. Katta, Fumiaki Takahashi
Phosphorus-containing compounds (PCCs) have been found to be significantly more effective than CF3Br for reducing burning velocity when added to stoichiometric hydrocarbon-air flames. However, when added to lean flames, DMMP (dimethylmethylphosphonate) is
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