Analysis of the system response of a spray passive downdraft evaporative cooling system

Daeho Kang, Richard K. Strand

Research output: Contribution to journalArticlepeer-review


A spray Passive Downdraft Evaporative Cooling (PDEC)system achieves great savings for space cooling and improves indoor environmental quality by supplying a large amount of fresh outdoor air. As previous studies heavily focused on the energy saving capability of a spray PDEC system due to lack of methods for a detailed analysis, the influence of cool humid supply air from a spray PDEC system in a space in buildings has not been comprehensively studied. This study is intended to evaluate the competence of a spray PDEC system as a primary cooling system in typical spaces in a primary school building by developing a method using building energy simulation tool. It runs one-day simulations in a hot dry climate and a warm moderate climate in order to distinctly examine the benefits and the areas that should be advanced. It analyses how a spray PDEC system responds to the space cooling loads and spaces conditioned by the system thermally behave. The results of the simulations affirm that a spray PDEC system is capable of conditioning building spaces in the two climates, indicating some areas to be improved.

Original languageEnglish (US)
Pages (from-to)101-111
Number of pages11
JournalBuilding and Environment
StatePublished - Jun 15 2019


  • Airflow
  • Cooling load
  • Evaporative cooling
  • Simulation
  • Spray
  • Thermal comfort

ASJC Scopus subject areas

  • Environmental Engineering
  • Civil and Structural Engineering
  • Geography, Planning and Development
  • Building and Construction


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