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Indoor Environmental Quality

Researchers:

Prof. J. L. Niu
Dr. C. K. Chau
Prof. C. M. Mak
Dr. M. Y. Chan
Dr. Horace K. W. Mui
Prof. S. K. Tang

Collaborators:

Prof Per Heiselberg, Hybrid Ventilation Center, Aalborg University, Denmark Prof Phil Jones, University of Wales, UK

Prof R Y Zhao and Prof H F Di, Department of Building Science and Technology, Tsinghua University, China Prof H Yoshino, Tohoku University, Japan

Prof R Luo, Tsinghua University, Dr Z J Zhu, The University of Science of Technology of China


Research in Indoor Environmental Quality

  • Development of low-energy air conditioning systems, which integrate radiant cooling, desiccant dehumidification, and personal ventilation systems.
  • Application of turbulence modeling and CFD (Computational Fluid Dynamics) for building ventilation study;  assessment of spread risks of air-borne and droplets-transmitted diseases in built environment
  • Characterization of indoor air pollutant emission from building materials and development of standard testing methods.
  • Total exposure assessment of Hong Kong population to indoor air pollutant; evaluate the economic health benefit associated with improvement in indoor air quality.
  • Indoor air quality control in special premises: schools; underground carparks; shopping malls
  • Tracer-gas technique for building ventilation measurements
  • Development of air-cleaning technologies including PCO (Photo-Catalytic-Oxidization) technologies

Consultancy Services are provided to the local government and industry

  • Diagnosis of indoor air quality, and auditing of building energy consumptions
  • Testing of air-cleaning efficiencies of commercial products
  • CFD(Computational fluid dynamics) analysis of building ventilation and wind environments

Research Projects:

  • Integration of desiccant cooling and cooled-ceiling in commercial air-conditioning systems (HK$495,000, Research Grant Council)
  • Optimized air supply temperature and velocity with radiant cooling and desiccant humidity control a/c systems (HK$581,817, Research Grants Council)
  • Numerical and experimental investigations of PER and thermal comfort under micro-climate control conditions (HK$503,083, Research Grants Council)
  • Developing mass-transfer-based models for the prediction of indoor air pollutant emissions from building materials in real buildings (HK$469,404, Research Grants Council)
  • Fuzzy air quality indices for management of indoor air quality in air conditioned buildings (HK$324,000, Research Grants Council)
  • Development of an ICU extraction equipment for preventing the transmission of contaminant exhaled air in intensive care unit (ICU) or isolation ward of hospital (HK$95,000, The Hong Kong Polytechnic University)
  • A new composite thermal comfort and indoor air quality model for air-conditioned offices (HK$453,404, Research Grants Council)
  • The total exposure assessment of Hong Kong population to various air pollutants (HK$680,371, The Hong Kong Polytechnic University)