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You searched on: Topic Area: Sustainability

Displaying records 11 to 20 of 34 records.
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11. A Dual Mode Evolutionary Algorithm Approach for Designing Optimized Finned-Tube Heat Exchangers
Topic: Sustainability
Published: 9/27/2012
Authors: David A Yashar, Piotr A Domanski, Janusz Wojusiak, Kenneth Kaufman
Abstract: The efficiency of a vapor compression system is strongly influenced by the performance of the finned-tube heat exchangers it employs. Heat exchanger performance is strongly influenced by the refrigerant circuitry, i.e., the connection sequence of th ...

12. Sealed Gravitational Capillary Viscometry of Dimethyl Ether and Two Next-Generation Refrigerants
Series: Journal of Research (NIST JRES)
Report Number: 117.014
Topic: Sustainability
Published: 9/26/2012
Authors: Dylan S. Cousins, Arno R Laesecke
Abstract: The viscosity of dimethyl ether (DME, C2H6O) and of the fluorinated propene isomers 2,3,3,3- tetrafluoroprop-1-ene (R1234yf, C3H2F4) and trans-1,3,3,3-tetrafluoropropene (R1234ze(E)) was measured in a combined temperature range from 242 K to 350 K ...

13. Density and Speed of Sound Measurements of Four Bio-derived Fuels
Topic: Sustainability
Published: 9/13/2012
Authors: Stephanie L Outcalt, Tara J Fortin
Abstract: Compressed-liquid densities and ambient pressure densities and speeds of sound of four biomass-derived fuels have been measured. The compressed-liquid measurements were made from 270 K to 470 K, and 0.5 MPa to 50 MPa. The ambient pressure measureme ...

14. Saturation molalities and standard molar enthalpies of solution of alpha-D-xylose(cr) in H2O(l); Standard molar enthalpies of solution of 1,4-beta-D-xylobiose(am), and 1,4-beta-D-xylotriose(am) in H2O(l)
Topic: Sustainability
Published: 5/14/2012
Authors: Robert Nathan Goldberg, Brian E Lang, Bruce Coxon, Stephen R. Decker
Abstract: The saturation molality of alpha-D-xylose(cr) in water was measured by using HPLC and is m(sat) = (8.43 ± 0.42) mol∙kg-1 at the temperature T = 298.15 K. It was also established that the anhydrous form of alpha-D-xylose(cr) is the crystalline ...

15. Materials Challenges in Carbon Mitigation Technologies
Topic: Sustainability
Published: 4/24/2012
Authors: Laura Espinal, Bryan D. Morreale
Abstract: Thermochemical conversion of fossil fuels currently dominates the national and global energy portfolio, with the most notable being the stationary power production and transportation vehicles sectors. As global energy demand continues to increase, p ...

16. Carbon Storage Properties of OMS-2 Manganese Oxide
Topic: Sustainability
Published: 4/10/2012
Authors: Lan (Lan) Li, Eric J Cockayne, Laura Espinal, Winnie K Wong-Ng
Abstract: Manganese oxide OMS-2 material, also known as alpha-MnO2, exhibits CO2 sorption hysteresis at pressures > 7 bar. Our experiments show that the hysteretic behavior strongly depends on time, temperature and pressure. To understand the atomic structures ...

17. A Prototype Web-Based User Interface for Sustainability Modeling and Optimization
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7850
Topic: Sustainability
Published: 3/28/2012
Authors: Guodong Shao, David Westbrook, Alexander Brodsky
Abstract: A growing number of manufacturing industries are initiating efforts to address sustainability issues. Energy efficient manufacturing and low carbon manufacturing are gaining particular attention. Finding the optimal solution of operational strate ...

18. Energy Consumption of Automatic Ice Makers Installed in Domestic Refrigerators, Revision 1
Series: Technical Note (NIST TN)
Report Number: 1697-2011
Topic: Sustainability
Published: 12/7/2011
Authors: David A Yashar, Ki-Jung Park
Abstract: This study examines the energy consumption of automatic ice makers installed in domestic refrigerators. The purpose of this research is to determine a method of measuring the energy consumption of automatic ice makers that will generate a repeatab ...

19. Effect of Al2O3 Nanolubricant on a Passively Enhanced R134a Pool Boiling Surface
Topic: Sustainability
Published: 11/15/2011
Author: Mark A Kedzierski
Abstract: This paper quantifies the influence of Al2O3 nanoparticles on the pool boiling performance of R134a/polyolester mixtures on a Turbo-BII-HP boiling surface. An Al2O3 nanolubricant (a lubricant containing dispersed nano-size particles) was made by sus ...

Topic: Sustainability
Published: 8/31/2011
Authors: Paul W Witherell, Prabir Sarkar, Anantha Narayanan Narayanan, Jae H. Lee, Rachuri Rachuri
Abstract: Standards and regulations have become an important part of today‰s society. Organizational and geographical dispersions of standards often create situations where manufacturers are forced to meet various standards for a product to reach expanded mark ...

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