Journal
ENERGY AND BUILDINGS
Volume 203, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.enbuild.2019.109448
Keywords
Dedicated Outdoor Air System integrated with ceiling fans; Air movement; Thermal comfort; Tropically acclimatized subjects; Steady-state conditions
Funding
- Center for Integrated Building Energy and Sustainability in the Tropics (CiBEST) [R-296-000-155-646]
- National University of Singapore
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The performance of a Dedicated Outdoor Air System integrated with ceiling fans (DOAS-CF) to enhance thermal comfort, perceived air quality (PAQ) and energy-saving potential was examined. 26 subjects were exposed to the combinations of temperatures (24, 27 and 30 degrees C) and air velocities in the range of 0.07 to 1.87 m/s at relative humidity (RH) of 60% for 3.5 h. The results showed that subjects felt thermally neutral and comfortable at 24 degrees C with air velocity of 0.07 m/s, 27 degrees C with air velocity of 0.94 m/s and 30 degrees C with air velocity of 1.87 mks. Thermal comfort (87%), thermal preference (72%), thermal acceptability (100%) and indoor air quality acceptability (98%) were highest at 27 degrees C at 0.94 m/s. The mean thermal sensation was highly correlated to the average SET* as a linear function. An energy simulation tool (IES-VE) was used to simulate the energy consumption and quantify the energy savings of the DOAS-CF. Relative to a typical room design condition of 24 degrees C with a conventional air-conditioning system, DOAS-CF achieved a 25.8% reduction in annual energy consumption when the room temperature was raised by 3 degrees C but compensated by increased air movement. (C) 2019 Elsevier B.V. All rights reserved.
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