Comparative analysis between conventional PI and fuzzy logic PI controllers for indoor benzene concentrations

Nun Pitalúa-Díaz*, Enrique J. Herrera-López, Guillermo Valencia-Palomo, Alvaro González-Angeles, Ricardo A. Rodríguez-Carvajal, Nohe R. Cazarez-Castro

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


Exposure to hazardous concentrations of volatile organic compounds indoors in small workshops could affect the health of workers, resulting in respirative diseases, severe intoxication or even cancer. Controlling the concentration of volatile organic compounds is required to prevent harmful conditions for workers in indoor environments. In this document, PI and fuzzy PI controllers were used to reduce hazardous indoor air benzene concentrations in small workplaces. The workshop is represented by means of a well-mixed room model. From the knowledge obtained from the model, PI and fuzzy PI controllers were designed and their performances were compared. Both controllers were able to maintain the benzene concentration within secure levels for the workers. The fuzzy PI controller performed more efficiently than the PI controller. Both approaches could be expanded to control multiple extractor fans in order to reduce the air pollution in a shorter time. The results from the comparative analysis showed that implementing a fuzzy logic PI controller is promising for assuring indoor air quality in this kind of hazardous work environment. 2015 by the authors; licensee MDPI, Basel, Switzerland.

Original languageEnglish
Pages (from-to)5398-5412
Number of pages15
JournalSustainability (Switzerland)
Issue number5
StatePublished - 2015


  • Benzene
  • Fuzzy logic PI controller
  • Hazardous
  • Indoor
  • PI controller
  • Well-mixed room model


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