Abstract
Proper distribution of conditioned air plays an important role in both the comfort of the occupants and the air quality of ventilated or air-conditioned spaces. Conditioned air should be supplied in proper quantities and temperatures to meet various thermal requirements of occupied spaces. Large air velocities, temperature gradients, and turbulence intensities should be avoided since thesefactors either individually or combined, may cause draft, which is undesirable for occupants, The main objectives of this study were to evaluate the air distribution performance indes (ADPI) based on measured centerline data and determine the effect of turbulence on ADPI. The data were collected in a large room (24 by 16 by 9 ft [7.3 by 4.9 by 2.7m]) with a high sidewall grill. The airflowcharacteristics at the centerline of the room for 21 cases under both isothermal and nonisothermal flow conditions were investigated. The results showed that ADPI vlaues determined using the 'centerline' data and the 'whole room' data were approximately the same. The ADPI results were strongly dependent on the room heat load and the airflow rate. The effect of turbulence on ADPI was investigatedusing a comfort model, and a modified ADPI model was presented. The results showed that the turbulence intensity strongly affected ADPI vlaues at high airflow rates.
| Original language | American English |
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| Pages | 322-331 |
| Number of pages | 10 |
| State | Published - 1996 |
| Event | 1996 Annual Meeting of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. - San Antonio, Texas Duration: 22 Jun 1996 → 26 Jun 1996 |
Conference
| Conference | 1996 Annual Meeting of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. |
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| City | San Antonio, Texas |
| Period | 22/06/96 → 26/06/96 |
NREL Publication Number
- NREL/CP-23349