Floor-supply displacement air-conditioning: Laboratory experiments

Takashi Akimoto, Tatsuo Nobe, Shin ichi Tanabe, Ken ichi Kimura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

23 Citations (Scopus)

Abstract

The results of laboratory measurements on the performance of a floor-supply displacement air-conditioning system in comparison to a displacement ventilation system with a side-wall-mounted diffuser and a ceiling-based distribution system are described. Thermal stratification was observed, as there were greater vertical air temperature differences in both of the displacement systems than in the ceiling-based system. The floor-supply displacement air-conditioning system produced a uniformly low air velocity at each measurement height, while a rather high air velocity near the floor was observed for the displacement ventilation system with a sidewall-mounted diffuser. Local mean age of air of the floor-supply displacement air-conditioning system was lower than that of the other systems, especially in the lower part of the room. According to the simulation results, the floor-supply displacement air-conditioning system with outdoor air cooling requires 34% less energy than the conventional air-conditioning system with outdoor air cooling.

Original languageEnglish
Title of host publicationASHRAE Transactions
PublisherASHRAE
Volume105
Publication statusPublished - 1999
Externally publishedYes
EventASHRAE Annual Meeting - Seattle, WA, USA
Duration: 1999 Jun 181999 Jun 23

Other

OtherASHRAE Annual Meeting
CitySeattle, WA, USA
Period99/6/1899/6/23

Fingerprint

Air conditioning
Air
Experiments
Ceilings
Ventilation
Cooling
Thermal stratification
Temperature

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

Cite this

Akimoto, T., Nobe, T., Tanabe, S. I., & Kimura, K. I. (1999). Floor-supply displacement air-conditioning: Laboratory experiments. In ASHRAE Transactions (Vol. 105). ASHRAE.

Floor-supply displacement air-conditioning : Laboratory experiments. / Akimoto, Takashi; Nobe, Tatsuo; Tanabe, Shin ichi; Kimura, Ken ichi.

ASHRAE Transactions. Vol. 105 ASHRAE, 1999.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Akimoto, T, Nobe, T, Tanabe, SI & Kimura, KI 1999, Floor-supply displacement air-conditioning: Laboratory experiments. in ASHRAE Transactions. vol. 105, ASHRAE, ASHRAE Annual Meeting, Seattle, WA, USA, 99/6/18.
Akimoto T, Nobe T, Tanabe SI, Kimura KI. Floor-supply displacement air-conditioning: Laboratory experiments. In ASHRAE Transactions. Vol. 105. ASHRAE. 1999
Akimoto, Takashi ; Nobe, Tatsuo ; Tanabe, Shin ichi ; Kimura, Ken ichi. / Floor-supply displacement air-conditioning : Laboratory experiments. ASHRAE Transactions. Vol. 105 ASHRAE, 1999.
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