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1. Design and Capabilities of NISTs Scale-Model Smokestack Simulator (SMSS)
Published: 4/17/2015
Authors: Aaron N Johnson, Joey T Boyd, Eric Harman, Mohammad Mohammad Khalil, Jacob E Ricker, Christopher J Crowley, Rodney A Bryant, Iosif I Shinder
Abstract: The amount of CO^d2^ emitted from a coal-fired power plant (CFPP) is measured by continuous emissions monitoring systems (CEMS) permanently installed in the exhaust smokestack. Both the CO^d2^ concentration and the bulk flow are continuously measured ...

2. Real Gas Corrections for High Beta Ratio Critical Flow Venturi (CFV) Installations.
Published: 4/17/2015
Authors: Aaron N Johnson, Eric W Lemmon
Abstract: For almost 50 years flow measurement applications using critical flow venturis (CFVs) have relied exclusively on the critical flow function (C*) to correct for viral effects. This work shows that C* does not account for all real gas effects. For high ...

3. Thermal Effects on Critical Flow Venturis
Published: 4/14/2015
Authors: John D Wright, Aaron N Johnson, Michael R Moldover, Woong Kang, Liang Zhang
Abstract: Critical flow venturis (CFVs) are widely used as working and transfer standards for gas flow measurement because of their long-term calibration stability (< 0.06 %) and well developed physical model. At Reynolds numbers {I}Re{/I} < 2.5 {multiply} 10^ ...

4. NIST's Fully Dynamic Gravimetric Liquid Flowmeter Standard.
Published: 4/13/2015
Authors: Jodie G Pope, Aaron N Johnson, Bernard J Filla, Joey T Boyd, Vern E. Bean, Christopher J. Crowley
Abstract: We describe a new dynamic, gravimetric, liquid flow standard (LFS) that determines flow by measuring the rate of change of the liquid mass accumulating in a collection tank. The LFS is a fully- automated,15 kg/s system that uses a proportional‹integ ...

5. An Uncertainty Analysis of Mean Flow Velocity Measurements Used to Quantify Emissions from Stationary Sources
Published: 5/20/2014
Authors: Rodney A Bryant, Olatunde B. Sanni, Elizabeth F Moore, Matthew F Bundy, Aaron N Johnson
Abstract: Point velocity measurements conducted by traversing a pitot tube across the cross section of a flow conduit continues to be the standard practice for evaluating the accuracy of continuous flow monitoring devices. Such velocity traverses were condu ...

6. Liquid Piston Prover Uncertainty Analysis Spreadsheet
Series: OTHER
Published: 3/25/2014
Authors: John D Wright, Aaron N Johnson, Jodie G Pope
Abstract: This publication is a spreadsheet that calculates the mass and volume flow uncertainty for a piston prover liquid flow standard based on user inputs of component uncertainties. The calculations use the basis equation and uncertainty analysis presen ...

7. Liquid Flow Meter Calibrations with the 0.1 L/s and 2.5 L/s Piston Provers
Series: Special Publication (NIST SP)
Report Number: 250-1039r1
Published: 1/15/2014
Authors: Jodie G Pope, John D Wright, Aaron N Johnson, Christopher J. Crowley
Abstract: This document provides a description of the 2.5 L/s and 0.1 L/s liquid flow calibration standards operated by the National Institute of Standards and Technology (NIST) Fluid Metrology Group to provide flow meter calibrations for customers. The 0 ...

8. Blow-Down Calibration of a Large 8 Path Ultrasonic Flow Meter under Quasi-Steady Flow Conditions
Published: 9/26/2013
Authors: Aaron N Johnson, Eric Harman, Joey T Boyd
Abstract: An array of critical flow venturis (CFVs) was installed in a blow-down facility and used to calibrate a large (i.e., D = 89.5 cm) 8 path ultrasonic flow meter (USM) at atmospheric pressure. The calibration was performed in dry air over a flow range ...

9. Greenhouse Gas Emissions and Dispersion #2. Comparison of FDS Predictions with Gas Velocity Measurements in the Exhaust Duct of a Stationary Source
Series: Special Publication (NIST SP)
Report Number: 1159
Published: 4/25/2013
Authors: Kuldeep R Prasad, Kevin Li, Elizabeth F Moore, Rodney A Bryant, Aaron N Johnson, James R Whetstone
Abstract: The burning of fossil fuels remains a major source of greenhouse gases responsible for global warming and climate change. In order to reduce greenhouse gas emissions, it is imperative to develop a capability to accurately measure these emission ...

10. Computational Fluid Dynamic (CFD) Investigation of NIST‰s Scale Model Smokestack Simulator
Published: 3/27/2013
Authors: Aaron N Johnson, Jacob E Ricker, Joey T Boyd
Abstract: Accurate flow measurements are essential to quantifying the amount of greenhouse gases (GHGs) and other pollutants emitted from the smokestacks of coal-fired power plants (CFPPs). However, flow measurement accuracy is limited by the adverse flow con ...

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