Skip to main content

Advertisement

SpringerLink
Log in

Energy performance and condensation risk of DCDV system in subtropical Hong Kong

  • Published:
Transactions of Tianjin University Aims and scope Submit manuscript

Abstract

The combined use of dry cooling (DC) system and dedicated ventilation (DV) system to decouple cooling and dehumidification process for energy efficiency was proposed for subtropical climates like Hong Kong. In this study, the energy performance and condensation risk of the use of DCDV system were examined by analyzing its application in a typical office building in Hong Kong. Through hour-by-hour simulation using actual equipment performance data and realistic building and system characteristics, it was found that with the use of DCDV system, the annual energy consumption could be reduced by 54% in comparison with the conventional system (constant air volume with reheat system). In respect of condensation risk, it was found that the annual frequency of occurrence of condensation on DC coil was 35 h. Additional simulations were conducted to examine the influence of different parameters on the condensation risk of DCDV system. Measures to ensure condensate-free on DC coil were also discussed.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. Ge Gaoming, Xiao Fu, Wang Shengwei. Neural network based prediction method for preventing condensation in chilled ceiling systems [J]. Energy and Buildings, 2012, 45(1): 290–298.

    Article  Google Scholar 

  2. Fong K F, Lee C K, Chow T T et al. Solar hybrid airconditioning system for high temperature cooling in subtropical city [J]. Renewable Energy, 2010, 35(11): 2439–2451.

    Article  Google Scholar 

  3. Binghooth A S, Zainal Z A. Performance of desiccant dehumidification with hydronic radiant cooling system in hot and humid climates [J]. Energy and Buildings, 2012, 51(1): 1–5.

    Article  Google Scholar 

  4. Niu J L, Kooi J V D, Ree H V D. Energy saving possibilities with cooled-ceiling systems [J]. Energy and Buildings, 1995, 23(2): 147–158.

    Article  Google Scholar 

  5. Niu J L, Zhang L Z, Zuo H G. Energy savings potential of chilled-ceiling combined with desiccant cooling in hot and humid climates [J]. Energy and Buildings, 2002, 34(5): 487–495.

    Article  Google Scholar 

  6. Fitzner K. Displacement ventilation and cooled ceilings: Results of laboratory tests and practical installations [C]. In: Proceedings of Indoor Air’ 96. Nagoya, Japan, 1996. 1–41.

    Google Scholar 

  7. Mumma S A. Designing dedicated outdoor air systems [J]. ASHRAE Journal, 2001, 43(5): 28–31.

    Google Scholar 

  8. Murphy J. Dehumidification performance of HVAC systems [J]. ASHRAE Journal, 2002, 44(3): 23–31.

    Google Scholar 

  9. Shank K M, Mumma S A. Symposium on integration of dedicated outside air dehumidification systems and terminal sensible cooling/heating [J]. ASHRAE Transactions, 2001, 1(4): 545–585.

    Google Scholar 

  10. BEAM Society. Building Environmental Assessment Method (BEAM Plus) [M]. BEAM Society, Hong Kong, 2009.

    Google Scholar 

  11. EnergyPlus 6. 0. 0 [EB/OL]. http://apps1.eere.energy.gov/buildings/energyplus, 2009.

  12. Leung Y C. Developing a Condensate-Free Fan-Coil System [D]. Department of Building Services Engineering, The Hong Kong Polytechnic University, Hong Kong, 2009.

    Google Scholar 

  13. Lee W L, Chen Hua, Leung Y C et al. Decoupling dehumidification and cooling for energy saving and desirable space air conditions in hot and humid Hong Kong [J]. Energy Conversion and Management, 2012, 53(1): 230–239.

    Article  Google Scholar 

  14. Jia J, Lee W L. Experimental study of performance of a dry cooling and dedicated ventilation (DCDV) system under different space cooling load conditions [J]. Energy Conversion and Management, 2013, 73(6): 158–166.

    Article  Google Scholar 

  15. Wong W L, Ngan K H. Selection of an example weather year for Hong Kong [J]. Energy and Buildings, 1993, 19(4): 313–316.

    Article  Google Scholar 

  16. Lee W L, Yik F W H, Burnett J. Simplifying energy performance assessment in the Hong Kong Building Environmental Assessment Method [J]. Building Services Engineering and Technology, 2001, 22(2): 113–132.

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Building Services Engineering, Hong Kong Polytechnic University, Hong Kong SAR, 00852, China

    Jie Jia  (贾 捷) & Wailing Lee  (李慧玲)

Authors
  1. Jie Jia  (贾 捷)
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Wailing Lee  (李慧玲)
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Wailing Lee  (李慧玲).

Additional information

Supported by Competitive Earmarked Research Grant of Hong Kong Government (CERG No. 522709).

Rights and permissions

Reprints and permissions

About this article

Cite this article

Jia, J., Lee, W. Energy performance and condensation risk of DCDV system in subtropical Hong Kong. Trans. Tianjin Univ. 20, 42–47 (2014). https://doi.org/10.1007/s12209-014-2092-2

Download citation

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s12209-014-2092-2

Keywords

Search

Navigation