Preprints
https://doi.org/10.5194/amt-2021-285
https://doi.org/10.5194/amt-2021-285

  28 Sep 2021

28 Sep 2021

Review status: this preprint is currently under review for the journal AMT.

An Instrument for Direct Measurement of Emissions: Cooling Tower Example

Christopher D. Wallis1, Mason D. Leandro2, Patrick Y. Chuang2, and Anthony S. Wexler1,3 Christopher D. Wallis et al.
  • 1Air Quality Research Center, University of California, Davis, CA, 95616, USA
  • 2Department of Earth and Planetary Sciences, University of California, Santa Cruz, CA, 95064, USA
  • 3Departments of Mechanical and Aerospace Engineering, Civil and Environmental Engineering, and Land, Air, and Water Resources, University of California, Davis, CA, 95616, USA

Abstract. Measuring emissions from stacks is challenging due to accessibility and safety concerns, and requires techniques to address a broad range of conditions and measurement challenges. One way to facilitate such measurements is to build an instrument package and then use a crane to hold the package over the emissions source. Here we describe such an instrument package that is used to characterize both wet droplet and dried aerosol emissions from cooling tower spray drift. In this application, the instrument package characterizes the velocity, size distribution and concentration of the wet droplet emissions and the mass concentration and elemental composition of the dried PM2.5 and PM10 emissions. Subsequent papers will present and analyze the wet and dried emissions from individual towers.

Christopher D. Wallis et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on amt-2021-285', Anonymous Referee #1, 28 Oct 2021
    • AC1: 'Reply on RC1', C. D. Wallis, 10 Nov 2021
  • RC2: 'Comment on amt-2021-285', Anonymous Referee #2, 08 Dec 2021
    • AC2: 'Reply on RC2', C. D. Wallis, 06 Jan 2022

Christopher D. Wallis et al.

Christopher D. Wallis et al.

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Short summary
Measuring emissions from stacks requires techniques to address a broad range of conditions and measurement challenges. Here we describe an instrument package held by a crane above a stack to characterize both wet droplet and dried aerosol emissions from cooling tower spray drift in situ. The instrument package characterizes the velocity, size distribution and concentration of the wet droplet emissions and the mass concentration and elemental composition of the dried PM2.5 and PM10 emissions.