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Buildings & Construction

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Displaying 526 - 550 of 3873

PLANETARY BOUNDARY LAYER MODELING AND TALL BUILDING DESIGN

January 1, 2016
Author(s)
Emil Simiu, Liang Shi, DongHun Yeo
Recent research into Planetary Boundary Layer (PBL) flows accounts for the difference between �neutral� and �conventionally neutral� flows. Of interest in structural engineering are �conventionally neutral� PBL flows, that is, flows affected by transport

Effect of Common Faults on the Performance of Different Vapor Compression Systems

December 31, 2015
Author(s)
Zhimin Du, Piotr A. Domanski, William V. Payne
The effect of faults on cooling capacity, COP, sensible heat ratio, and superheat/subcooling temperatures in five split and rooftop systems, which use different types of expansion devices, compressors and refrigerants, are separately compared and analyzed

Comparative study of methods to measure the density of Cementitious powders

December 14, 2015
Author(s)
Michelle A. Helsel, Chiara F. Ferraris, Dale P. Bentz
The accurate measurement of the density of hydraulic cement plays an essential role in the determination of concrete mixture proportions. As more supplementary cementitious materials (SCM), such as fly ash and slag, or cement replacement materials, such as

Heat pump concepts for nZEB Technology developments, design tools and testing of heat pump systems for nZEB in the USA, Country report IEA HPT Annex 40 Task 2, Task 3 and Task 4 of the USA

December 8, 2015
Author(s)
William V. Payne, Arthur H. Fanney, William M. Healy, Joshua D. Kneifel, Tania Ullah, Farhad Omar, Steven T. Bushby, Brian P. Dougherty, Dustin G. Poppendieck, Lisa C. Ng
The IEA HPT Annex 40 "Heat pump concepts for Nearly Zero Energy Buildings" deals with the application of heat pumps as a core component of the HVAC system for Nearly or Net Zero energy buildings (NZEB). This report covers Task 2 on the system comparison

Energy Use Consequences of Ventilating a Net-Zero Energy House

December 2, 2015
Author(s)
Lisa C. Ng, William V. Payne
A Net-Zero Energy Residential Test Facility (NZERTF) has been constructed at the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland to demonstrate that a home similar in size, aesthetics, and amenities to those in the

Computer Evacuation Models for Buildings

November 9, 2015
Author(s)
Erica D. Kuligowski
N/A for SFPE Handbook Chapters. Included here is text from the chapter introduction: "With the rapid increase in computer capability and the increase in egress model development, there is a need for guidance on evacuation modeling, specifically the process

Heat transfer principles in thermal calculation of structures in fire

November 1, 2015
Author(s)
Chao Zhang, Usmani Asif
Structural fire engineering (SFE) is a relatively new interdisciplinary subject, which requires a comprehensive knowledge of heat transfer, fire dynamics and structural analysis. It is predominantly the community of structural engineers who currently carry

Chemical Kinetics and Fire

October 7, 2015
Author(s)
Gregory T. Linteris, John Griffiths
The purpose of this chapter is to set out the principles of chemical kinetics as they apply to combustion in flames and fires. Chemical equilibrium, which was discussed in a previous chapter, deals with the final preferred state of a given set of reactants

Enforcing realizability in explicit multi-component species transport

October 5, 2015
Author(s)
Randall J. McDermott, Kevin B. McGrattan, Jason Floyd
A strategy is proposed to guarantee realizability of species mass fractions in explicit time integration of the partial differential equations governing fire dynamics, which is multi-component transport problem. For a mixture of $n$ species, the

Assessment of Water Vapor Diffusion in Firefighters Protective Clothing

October 1, 2015
Author(s)
Shonali Nazare, Christopher W. Meyer, Daniel M. Madrzykowski
Structural firefighters often encounter hot and humid environments during interior firefighting. The water vapor transfer to and from the skin has great influence on thermo-physiological comfort of the firefigher. Quantitative information on water vapor

Impact of Electricity Tariff Parameters on Net Zero Home Cost of Energy

September 29, 2015
Author(s)
Andrew P. Kuo, David Holmberg, Steven T. Bushby
Time-varying electricity rates impact the costs of operation and the value of renewable generation and storage resources. This study investigates the economic impact of electricity tariff parameters on the value of solar photovoltaic (PV) systems in the
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