Validation of ammonia emissions from dairy cow manure estimated with a non-steady-state, recirculation flux chamber with whole-building emissions

Victoria Blanes-Vidal, P. A. Topper, Eileen Fabian

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

A non-steady-state flux chamber with recirculation airflow was constructed and coupled with a portable photoacoustic multi-gas analyzer to determine ammonia emissions from dairy manure. The objective of this work was to validate this flux chamber system by performing a comparison between the flux chamber emission rates and whole-building emission rates calculated from an ammonia balance in a mechanically ventilated experimental test room. It was found that flux chamber emission estimates were greatly improved with the addition of internal air recirculation to provide air velocity over the enclosed manure surface. Validation tests of the recirculation flux chamber showed a 9% to 37% underestimation of the emissions calculated from the ammonia balance (R 2 = 0.72). The non-steady-state, recirculation flux chamber method can be used to estimate ammonia emissions in naturally ventilated buildings with an accuracy comparable to other available methods. However, the validation tests showed high variability in the results, which is thought to be associated with the different consistency of the manure used in the experiments and the airflow dynamics over the enclosed manure surface.

Original languageEnglish (US)
Pages (from-to)633-640
Number of pages8
JournalTransactions of the ASABE
Volume50
Issue number2
StatePublished - Mar 2007

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flux chamber
dairy manure
Manure
Dairies
Manures
Ammonia
manure
ammonia
Fluxes
animal manures
Air
air flow
airflow
air
Photoacoustic effect
Gases
testing
gases
methodology
gas

All Science Journal Classification (ASJC) codes

  • Forestry
  • Food Science
  • Biomedical Engineering
  • Agronomy and Crop Science
  • Soil Science

Cite this

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abstract = "A non-steady-state flux chamber with recirculation airflow was constructed and coupled with a portable photoacoustic multi-gas analyzer to determine ammonia emissions from dairy manure. The objective of this work was to validate this flux chamber system by performing a comparison between the flux chamber emission rates and whole-building emission rates calculated from an ammonia balance in a mechanically ventilated experimental test room. It was found that flux chamber emission estimates were greatly improved with the addition of internal air recirculation to provide air velocity over the enclosed manure surface. Validation tests of the recirculation flux chamber showed a 9{\%} to 37{\%} underestimation of the emissions calculated from the ammonia balance (R 2 = 0.72). The non-steady-state, recirculation flux chamber method can be used to estimate ammonia emissions in naturally ventilated buildings with an accuracy comparable to other available methods. However, the validation tests showed high variability in the results, which is thought to be associated with the different consistency of the manure used in the experiments and the airflow dynamics over the enclosed manure surface.",
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Validation of ammonia emissions from dairy cow manure estimated with a non-steady-state, recirculation flux chamber with whole-building emissions. / Blanes-Vidal, Victoria; Topper, P. A.; Fabian, Eileen.

In: Transactions of the ASABE, Vol. 50, No. 2, 03.2007, p. 633-640.

Research output: Contribution to journalArticle

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