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Buildings & Construction

Energy efficiency

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Displaying 251 - 275 of 297

Effect of Diamond Nanolubricant on R134a Pool Boiling Heat Transfer

May 21, 2012
Author(s)
Mark A. Kedzierski
This paper quantifies the influence of diamond 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

Annex 47 Report 1: Commissioning Overview

December 1, 2011
Author(s)
Chlo? Legris, Daniel Choiniere, Natascha S. Milesi-Ferretti
This report summarizes part of the work of IEA-ECBCS Annex 47 Cost-Effective Commissioning of Existing and Low Energy Buildings. It is based on the research findings from the participating countries. The publication is an official Annex report. Report 1,

An Information Model Standard for Facility Integration With A Smart Grid

November 1, 2011
Author(s)
Steven T. Bushby
The National Electrical Manufacturer's Association (NEMA) and the American Society of Heating Refrigerating, and Air-Conditioning Engineers (ASHRAE) are working to cooperatively develop a national Facility Smart Grid Information Model standard. This

Strategy and Modeling for Building DR Optimization

October 17, 2011
Author(s)
Richard Lau, Sami Ayyorgun, Siun Chuon Mau, Archan Misra, David Holmberg, Steven T. Bushby
While it is well recognized that renewable microgrid generation and intelligent storage can significantly reduce a building's need for grid power and its peak loading, there is currently no sound and generalized approach to combine these two technologies

U.S. Commercial Building Airtightness Requirements and Measurements

October 12, 2011
Author(s)
Steven J. Emmerich, Andrew K. Persily
In 1998, Persily published a review of commercial and institutional building airtightness data that found significant levels of air leakage and debunked the “myth” of the airtight commercial building. Since that time, the U.S. National Institute of

Energy Price Indices and Discount Factors for Life-Cycle Cost Analysis - 2011

September 8, 2011
Author(s)
Amy S. Rushing, Joshua D. Kneifel, Barbara C. Lippiatt
This is the 2011 edition of energy price indices and discount factors for performing life-cycle cost analyses of energy and water conservation and renewable energy projects in federal facilities. It will be effective from April 1, 2011 to March 31, 2012

VISCOSITY AND DENSITY OF ALUMINUM OXIDE NANOLUBRICANT

August 17, 2011
Author(s)
Mark A. Kedzierski
This paper presents liquid kinematic viscosity and density measurements of a synthetic polyolester-based aluminum oxide (Al2O3) nanoparticle dispersion (nanolubricant) at atmospheric pressure over the temperature range 288 K to 318 K. The polyolester was a

Consumer Use of Dishwashers, Clothes Washers, and Dryers: Data Needs and Availability

March 21, 2011
Author(s)
Christopher Iglehart, Natascha S. Milesi-Ferretti, Michael Galler
NIST provides technical support to the DOE in developing test procedures for a variety of residential appliances. As part of this process, DOE seeks representative consumer use data to establish test procedures that are representative of real world use

Toward Energy Efficient Manufacturing Enterprises

February 2, 2011
Author(s)
Kevin W. Lyons, Alexander Weissman, Ram D. Sriram, Lalit Chordia
Industrial enterprises have significant negative impacts on the global environment. Collectively, from energy consumption to greenhouse gases to solid waste, they are the single largest contributor to a growing number of planet-threatening environmental

WATER TRANSPORT ACROSS A POLYMER ELECTROLYTE MEMBRANE UNDER THERMAL GRADIENTS

January 11, 2011
Author(s)
David L. Jacobson, Richard Fu, Takeshi Shiomi, Ugur Pasaogullari, Joshua Preston, Shinichi Miyazaki, Yuichiro Tabuchi, Daniel S. Hussey
A fundamental experimental and numerical study of the water transport across a perfluorosulfonic acid (PFSA) membrane under a temperature gradient is presented. The water transport phenomenon was experimentally investigated through water flux measurement

Residential Heat Pump Heating Performance with Single Faults Imposed

October 29, 2010
Author(s)
William V. Payne, Piotr A. Domanski, Seok Ho Yoon
A heat pump equipped with a thermostatic expansion valve (TXV) was tested in environmental chambers during steady-state no-fault and imposed-fault operation. The studied system was an R410A split residential heat pump with an 8.8 kW nominal cooling
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