TY - JOUR
T1 - Experimental investigation of reduced-mixing personal ventilation jets
AU - Khalifa, H. Ezzat
AU - Janos, Michael I.
AU - Dannenhoffer, John F.
N1 - Funding Information:
The research described herein has been performed under US EPA Grant/Cooperative agreement Award #CR-83199201-0 to Syracuse University. Although this research has been funded wholly or in part by the US EPA, it has not been subjected to the Agency's required peer and policy review; and therefore, does not necessarily reflect the views of the Agency and no official endorsement should be inferred. Additional support was received from the NYSTAR-Awarded STAR Center for Environmental Quality Systems, and from the Syracuse Center of Excellence in Environmental and Energy Systems. The authors express their thanks to Mr James Smith, who contributed to the construction and setting-up of the experimental facility, and to Mr Nathan Tainter, who also contributed to the construction and setting-up of the experimental facility, and obtained some of the experimental velocity data.
PY - 2009/8
Y1 - 2009/8
N2 - This paper presents an investigation of the design and performance characteristics of personalized ventilation (PV) systems that, in combination with general ventilation, deliver high quality air to the breathing zone (BZ) with no more clean air supply than indicated by ANSI/ASHRAE 62.1-2004, while satisfying acceptable ergonomic and aesthetic considerations. Under these conditions, the energy used for conditioning the clean air will not exceed that of a conventional ventilation system. We introduce a novel PV nozzle that achieves high BZ air quality with a small fraction of the clean air indicated by the ANSI/ASHRAE Standard. Tracer gas experimental results presented in this paper demonstrate the advantages of the novel nozzle relative to conventional PV nozzles. The results show that, at a PV clean air supply of only 2.4 l/s, the new nozzle achieves a BZ ventilation effectiveness close to 7 versus less than 2 for a conventional nozzle delivering the same amount of clean air. A companion paper presents a computational analysis of the same concept, validated against the experimental results of the present paper.
AB - This paper presents an investigation of the design and performance characteristics of personalized ventilation (PV) systems that, in combination with general ventilation, deliver high quality air to the breathing zone (BZ) with no more clean air supply than indicated by ANSI/ASHRAE 62.1-2004, while satisfying acceptable ergonomic and aesthetic considerations. Under these conditions, the energy used for conditioning the clean air will not exceed that of a conventional ventilation system. We introduce a novel PV nozzle that achieves high BZ air quality with a small fraction of the clean air indicated by the ANSI/ASHRAE Standard. Tracer gas experimental results presented in this paper demonstrate the advantages of the novel nozzle relative to conventional PV nozzles. The results show that, at a PV clean air supply of only 2.4 l/s, the new nozzle achieves a BZ ventilation effectiveness close to 7 versus less than 2 for a conventional nozzle delivering the same amount of clean air. A companion paper presents a computational analysis of the same concept, validated against the experimental results of the present paper.
KW - Indoor air quality
KW - Personalized Ventilation
KW - Ventilation
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U2 - 10.1016/j.buildenv.2008.11.006
DO - 10.1016/j.buildenv.2008.11.006
M3 - Article
AN - SCOPUS:61749101722
SN - 0360-1323
VL - 44
SP - 1551
EP - 1558
JO - Building and Environment
JF - Building and Environment
IS - 8
ER -