Arid raceway temperature model evaluation

G. Khawam, P. Waller, S. Attallah, R. Ryan

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


The ARID (Algae Raceway Integrated Design) raceway temperature model, written in Visual Basic for Applications, calculates algae culture temperature in ARID and conventional raceways as a function of meteorological data from agricultural weather stations. The model is an atmospheric boundary layer model and uses energy balance terms from the Penman-Monteith equation. The original model used evapotranspiration, as calculated by the weather station, and assumed an average daily albedo. In this research, equations for albedo and for direct calculation of evaporation from atmospheric parameters were added to the ARID model. Albedo was calculated with the Fresnel equations. The Penman-Monteith model was adjusted for algae raceway evaporation rather than reference evapotranspiration. The new model components were calibrated with data from a 21-day algae growth experiment in the ARID raceway during winter 2011. The model was also adapted to model variable circulation times and heat transfer through a canal cover. In summary, this research improved and calibrated the ARID temperature model.

Original languageEnglish (US)
Pages (from-to)333-340
Number of pages8
JournalTransactions of the ASABE
Issue number1
StatePublished - 2014


  • ARID raceway
  • Algae
  • Conventional raceway
  • Open pond
  • Reflectance
  • Temperature model.

ASJC Scopus subject areas

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


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