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You searched on: Topic Area: High Performance Buildings

Displaying records 51 to 60 of 95 records.
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51. Properties for Accurate Gas Flow Measurements
Topic: High Performance Buildings
Published: 10/15/2010
Author: John D Wright
Abstract: Accurate gas properties are needed to take full advantage of the low uncertainties provided by NIST‰s Gas Flow Calibration Services. If a flowmeter user and NIST use different values for these properties (molecular mass, compressibility, density, vis ...

52. Evolutionary Computation Approach to Heat Exchanger Design
Topic: High Performance Buildings
Published: 6/26/2010
Authors: David A Yashar, Janusz Wojusiak, Kenneth Kaufman, Piotr A Domanski
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 ...

53. Feasibility of an Accurate Dynamic Standard for Water Flow
Topic: High Performance Buildings
Published: 6/1/2010
Authors: Iosif I Shinder, Michael R Moldover
Abstract: We used NIST's primary water flow standard to study the feasibility of accurately determining mass flow rates {I}m{/I}^ddot^ of water "dynamically," that is from the time derivative of the weight {I}W{/I} of the collection tank: {I}m{/I ...

54. Uncertainty Analysis of Thermal Transmission Properties Determined by ASTM C 177
Topic: High Performance Buildings
Published: 3/1/2010
Author: Robert R Zarr
Abstract: An uncertainty analysis for steady-state thermal transmission properties determined by the National Institute of Standards and Technology (NIST) 1016 mm Guarded-Hot-Plate apparatus is presented for fibrous-glass blanket and expanded polystyrene board ...

55. Ontology Development For Low-Energy Building Embedded Commissioning
Topic: High Performance Buildings
Published: 11/17/2009
Authors: Kwang Jun Lee, Omer Akin, Burcu Akinci, James Garrett, Steven T Bushby
Abstract: This paper presents the results of initial work in developing an ontology for improving information exchange and automation in building system commissioning practices. In our previous research dealing with the derivation of product models from buildi ...

56. A Benchmark Study on the Thermal Conductivity of Nanofluids
Topic: High Performance Buildings
Published: 11/13/2009
Authors: Jacopo Buongiorno, David Venerus, Naveen Prabhat, Thomas McKrell, Jessica Townsend, Rebecca Christianson, Yuriy Tolmachev, Pawel Keblinski, Lin-wen Hu, Jorge Alvarado, In Cheol Bang, Sandra Bishnoi, Marco Bonetti, Frank Botz, Anselmo Cecre, Yun Chang, Gang Chen, Haisheng Chen, Sung Jae Chung, Minking Chyu, Sarit Das, Roberto Di Paola, Yulong Ding, F. Dubois, Grzegorz Dzido, Jacob Eapen, Werner Escher, Denis Funfschilling, Quentin Galand, Jinwei Gao, Patricia Gharagozloo, Kenneth Goodson, Jorge Gustova Jin, Haiping Hong, Mark Horton, Carlo Iorio, Andrzej Jarzebski, Yiran Jiang, L.W. Jin, Stephan Kabelac, Aravind Kamath, Mark A Kedzierski, Chongyoup Kim, Ji Hyun Kim, Sukwon Kim, Lim Geok Kieng, K Leong, Indranil Manna, Bruno Michel, Rui Ni, Hrishikesh Patel, John Philip, Dimos Poulikakos, Cecile Reynaud, Raffaele Savino, Pawan Singh, Pengxiang Song, T. Sundararajan, Elena Timofeeva, Todd Tritcak, A.N. Turanov, Stefan Van Vaerenbergh, Dongsheng Wen, Sanjeeva Witharana, Charles Chun Yang, W.-H. Yeh, Xiao-Zheng Zhao, Sheng-Qi Zhou
Abstract: This article reports on the International Nanofluid Property Benchmark Exercise (INPBE) in which the thermal conductivity of identical samples of colloidal dispersions of nanoparticles, or nanofluids , was measured by over 30 organizations worldwi ...

57. Assessing the Measurement Uncertainty of Thermophysical Properties
Topic: High Performance Buildings
Published: 9/2/2009
Author: Robert R Zarr
Abstract: A generalized approach for the expression of measurement uncertainty consistent with current international practice is presented. The approach is applicable to all kinds of quantitative measurements including measurements of thermophysical propertie ...

58. Glassy Carbon as an Absolute Intensity Calibration Standard for Small Angle Scattering
Topic: High Performance Buildings
Published: 8/19/2009
Authors: Andrew John Allen, Jan Ilavsky, Fan Zhang, Gabrielle G Long, Pete R. Jemian
Abstract: Absolute calibration of small-angle scattering (SAS) intensity data (in units of differential cross-section per unit sample volume per unit solid angle) is essential for many important aspects of quantitative SAS analysis, such as obtaining the numbe ...

59. Comparison of Five Natural Gas Equations of State Used for Flow and Energy Measurement
Topic: High Performance Buildings
Published: 8/14/2009
Authors: Aaron N Johnson, William Johansen
Abstract: Measurements of the flow and the energy content of natural gas rely on equations of state to compute four thermodynamic properties: 1) compressibility factor; 2) critical flow factor; 3) speed of sound; and 4)isentropic exponent. We compare these com ...

60. Dynamic Gravitational Standard for Liquid Flow: Model and Measurements
Topic: High Performance Buildings
Published: 8/14/2009
Authors: Iosif I Shinder, Michael R Moldover
Abstract: We report progress in testing a dynamic gravimetric standard using both steady and unsteady water flows. For steady flows in the range 10 kg/s to 60 kg/s, the difference between the dynamic standard and NIST s static primary standard was 0.015 % wit ...

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