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Experimental study of determining neutral temperatures for conventional mixing and stratum ventilation modes in environmental chamber.

Number: pap. B6-053

Author(s) : FONG M. L., FONG K. F., LIN Z.

Summary

Conventional mixing air conditioning is designed to provide a desirable indoor conditioned space. We are looking for other ventilation modes that can achieve thermal comfort environment, low carbon emission and low energy consumption. Stratum ventilation is one of possible solutions. This paper is to investigate the thermal comfort of college-age Chinese adolescents under conventional mixing and stratum ventilation operated in a confined environmental chamber during the summer of subtropical Hong Kong. Forty-eight subjects wearing 0.57 clo standard clothing were exposed to several different thermal conditions under sedentary activity for 3 hours. The relationship between thermal sensation and energy consumption in conventional mixing, and stratum ventilation was found. Thermal comfort analysis was carried out according to the designated supply flow rate, room temperature, air speed, relative humidity, operative temperature and effective temperature for various ventilation modes. The neutral temperatures under conventional mixing and stratum ventilation were found to be 24.6 and 25.6°C respectively at supply air flow of 300 L/s (10 air change per hour). In comparison with mixing ventilation, energy consumptions of stratum ventilation were found to be 9% less. Therefore, stratum ventilation can achieve thermal comfort at elevated indoor temperature hence less energy use in the conditioned space.

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Pages: 9 p.

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Details

  • Original title: Experimental study of determining neutral temperatures for conventional mixing and stratum ventilation modes in environmental chamber.
  • Record ID : 30005376
  • Languages: English
  • Source: ACRA2010. Asian conference on refrigeration and air conditioning: Tokyo, Japan, June 7-9, 2010.
  • Publication date: 2010/06/07

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