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Proceedings of the 8th International Symposium on Heating, Ventilation and Air Conditioning pp 255–263Cite as

The Characters of the Nozzle’s Jet and Design Method of the Secondary Airflow-Relay Equipment in the Large-Space Building

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Part of the book series: Lecture Notes in Electrical Engineering ((LNEE,volume 261))

Abstract

When the nozzle is used to form the stratified air-conditioning system in the large-space and large-span building, the nozzle air supply does not meet the requirements of the air-conditioning zone in the stratified air-conditioning system because the nozzle’s jet range is limited. To solve this problem, we have taken an actual large-space building as an example and adopted the secondary airflow-relay equipment to relay the nozzle’s air supply. In this paper, basing on the results of the field experiments, we described the design method of the secondary airflow-relay equipment, studied the characters of the nozzle’s jet, and provided the size and fixed form of the secondary airflow-relay equipment in the large-space and large-span building.

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Abbreviations

X :

The nozzle’s jet range (m)

Y :

The jet vertical drop (m)

D 0 :

The nozzle’s diameter (m)

α :

The angel of the nozzle’s axis airflow to the horizontal direction

K :

Correction factor

A :

The nozzle’s turbulence factor

T 0 :

The thermodynamic temperature of export airflow (K)

T n :

The thermodynamic temperature of the indoor air (K)

ΔT :

The temperature difference between the nozzle’s axis airflow and the indoor air (K)

V 0 :

The axis speed of the nozzle’s jet (m/s)

g :

Free-fall acceleration (m/s2)

Ar :

Archimede’s number

H 0,1/H 0,2 :

The axis’s height in Case 1 and Case 2 (m)

Vr :

The speed of the point at the distance r to the axis on the cross section of the jet (m/s)

R :

The cross-sectional diameter in the nozzle’s jet range X (m)

r :

The distance to the jet axis (m)

Vx :

The axis’s velocity in the nozzle’s jet range X (m/s)

Tx :

The axis’s temperature in the nozzle’s jet range X (K)

ΔTx :

The axis and the indoor air design temperature difference along the nozzle’s jet (K)

Q 0 :

The secondary airflow equipment’s volume (m3/h).

References

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  7. Lu YQ (2008) Practical heat and air conditioned design manual, second version. China building industry press, Beijing, pp 1915–1921

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Acknowledgments

This work is financially supported by the Leading Academic Discipline Project of Shanghai Municipal Education Commission (J50502) and the National Natural Science Foundation of China (51108263; 51278302).

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Authors and Affiliations

  1. School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, China

    Yezan Cui & Chen Huang

Authors
  1. Yezan Cui
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  2. Chen Huang
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Corresponding author

Correspondence to Chen Huang .

Editor information

Editors and Affiliations

  1. Xi'an University of Architecture and Technology, Xi'an, People's Republic of China

    Angui Li

  2. Tsinghua University, Beijing, People's Republic of China

    Yingxin Zhu

  3. The University of Hong Kong, Hong Kong, People's Republic of China

    Yuguo Li

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© 2014 Springer-Verlag Berlin Heidelberg

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Cui, Y., Huang, C. (2014). The Characters of the Nozzle’s Jet and Design Method of the Secondary Airflow-Relay Equipment in the Large-Space Building. In: Li, A., Zhu, Y., Li, Y. (eds) Proceedings of the 8th International Symposium on Heating, Ventilation and Air Conditioning. Lecture Notes in Electrical Engineering, vol 261. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-39584-0_28

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  • DOI: https://doi.org/10.1007/978-3-642-39584-0_28

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-39583-3

  • Online ISBN: 978-3-642-39584-0

  • eBook Packages: EngineeringEngineering (R0)

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