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Buildings & Construction

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Displaying 651 - 675 of 3878

Long Term Air Quality Monitoring in a Net-Zero Energy Residential Test Facility Designed with Specifications for Low Emitting Interior Products

August 6, 2014
Author(s)
Dustin G. Poppendieck, Lisa C. Ng, Matthew P. Schlegel, Andrew K. Persily, Alfred Hodgson
This study evaluated the effectiveness of a low-VOC (volatile organic compounds) specification designed to minimize occupant exposures to indoor air pollutants in a net-zero energy research house meeting the ASHRAE Standard 62.2 ventilation requirements

Long Term Emissions from Spray Polyurethane Foam Insulation

August 6, 2014
Author(s)
Dustin G. Poppendieck, Steven J. Nabinger, Matthew P. Schlegel, Andrew K. Persily
The desire to build more energy efficient homes in the United States has lead to the expansion of the residential spray polyurethane foam (SPF) insulation industry. Annually, over 100,000 homes in the United States are constructed or retrofit using SPF

Simulation Study of Carbon Monoxide Exposure from Portable Generators in U.S. Residences

August 6, 2014
Author(s)
Andrew K. Persily, Steven J. Emmerich, Yanling Wang, Brian J. Polidoro
A simulation study was conducted to evaluate indoor CO exposures as a function of portable generator location and CO emission rate in order to support the development of potential CO emission limits for generators. These simulations employed the multizone

BEHAVIOR OF STEEL COMPONENTS SUBJECTED TO LOCALIZED FIRE

June 11, 2014
Author(s)
Chao Zhang, John L. Gross, Lisa Y. Choe
Recent numerical studies on the behavior of steel components subjected to a localized fire are presented. Sequentially coupled thermo-mechanical simulations were conducted to predict the steel temperature distribution, the deformation mode and failure

USA - Characteristics, Impacts, and Future Directions

June 11, 2014
Author(s)
Sarah Slaughter, Douglas Thomas, Robert E. Chapman
Investments in the built environment provide the basis for civil society and commerce, and construction is an engine of growth for the U.S. economy, equaling approximately 3 % to 5 % of GDP. Current U.S. annual expenditures for construction-related R&D are

Flame Inhibition by CF3CHCl2 (HCFC-123)

May 20, 2014
Author(s)
Valeri I. Babushok, Gregory T. Linteris, Oliver Meier, John Pagliaro
A kinetic model is suggested for hydrocarbon-air flame propagation with addition of hydrochloroflurocarbon (HCFC) fire suppressants, encompassing the combined chemistry of fluorine- and chlorine-containing species. Calculated burning velocities using the

The Case for Delivering the Infrastructure for Digital Building Regulations

May 19, 2014
Author(s)
Mark E. Palmer, James H. Garrett
The building industry uses numerous engineering standards, building codes, specifications and regulations and a diverse set of industry vocabularies to describe, assess, and deliver constructed facilities. As part of the expanding use of building

Characterization of Emissions from Spray Polyurethane Foam: Letter Report to U.S. Consumer Product Safety Commission Interagency Agreement CPSC-I-13-0016

May 15, 2014
Author(s)
Dustin G. Poppendieck, Matthew P. Schlegel, Andrew K. Persily, Steven J. Nabinger
This letter report provides a project update reflecting the activities to date under the FY2013 interagency agreement between CPSC and NIST. The objective of that agreement is to develop testing and measurement protocols for determining the quantities and

IAQ Specifications for a Netzero Energy Research Home

May 1, 2014
Author(s)
Andrew K. Persily, Lisa C. Ng
The National Institute of Standards and Technology (NIST) recently constructed the Net Zero Energy Research Test Facility (NZERTF) to demonstrate a range of technologies in support of achieving netzero or near zero residential buildings (1). The energy

An improved method of modeling infiltration in commercial building energy models

April 28, 2014
Author(s)
Lisa C. Ng, Steven J. Emmerich, Andrew K. Persily
As various strategies for improving building envelope and HVAC equipment efficiencies are increasingly used to reduce building energy use, a greater percentage of energy loss can occur through building envelope leakage. Although the energy impacts of
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