Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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Thermal Environment Around the Outdoor Unit Installed in the Space between Buildings in the Commercial Area

상업지역내 건물 사이 공간에 설치된 실외기 주변 열 환경 분석

  • Shin, Hak-Jong (Department of Architectural Engineering, University of Seoul) ;
  • Kwak, In-Kyu (CJ Logistics) ;
  • Mun, Sun-Hye (Department of Architectural Engineering, University of Seoul) ;
  • Huh, Jung-Ho (Department of Architectural Engineering, University of Seoul)
  • 신학종 (서울시립대학교 건축공학과) ;
  • 곽인규 (CJ대한통운 건설부문) ;
  • 문선혜 (서울시립대학교 건축공학과) ;
  • 허정호 (서울시립대학교 건축공학과)
  • Received : 2018.12.31
  • Accepted : 2019.05.20
  • Published : 2019.06.30
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Abstract

In commercial areas, outdoor units are typically installed close to one another in the narrow space between buildings due to insufficient regulations. This makes it difficult to ventilate the discharge airflow, which may lead to deterioration of the performance of outdoor units. This study conducted CFD simulation to analyze the thermal environment according to the installation distance of the outdoor unit. The outdoor unit was installed in the space between buildings, and the thermal environment was analyzed by changing installation distance and wind speed. The performance of the outdoor unit was evaluated by measuring the on-coil temperature. The results show that the closer the distance between outdoor units, the higher the condenser on-coil temperature. Also, the on-coil temperature appeared to rise dramatically at lower wind speed.

Keywords

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Fig. 1 Physical model

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Fig. 2 Comparison of on-coil temperature

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Fig. 3 Comparison of ratio within operation range

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Fig. 4 Comparison of thermal environment of the different cases

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Fig. 5 Comparison of on coil temperatures of different heights

Table 1 Case classification according to building distance and wind speed

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References

  1. Chow. T.T., Lin. Z., and Yang. X.Y., Placement of Condensing Units of Split-type Air-conditioners at Low-rise Residences, Applied Thermal Engineering, Vol. 22, pp.1431-1444, 2002. https://doi.org/10.1016/S1359-4311(02)00068-6
  2. Chow. T.T. and Lin. Z., Prediction of On-coil Temperature of Condensers Installed at Tall Building Re-entrant, Applied Thermal Engineering, Vol. 19, pp.117-132, 1999. https://doi.org/10.1016/S1359-4311(98)00042-8
  3. Avara. Abdollah. and Daneshgar. Ehsan., Optimum Placement of Condensing Units of Split-type Air-conditioners by Numerical Simulation, Energy and Buildings, Vol. 40, pp.1268-1272, 2008. https://doi.org/10.1016/j.enbuild.2007.11.011
  4. Duan. R., Wang. X., Song. Y., and Liu. J., Influence of Air-conditioning Outdoor Unit Arrangement Strategy on Energy Consumption, Procedia Engineering, Vol. 146, pp.350-358, 2016. https://doi.org/10.1016/j.proeng.2016.06.409
  5. Xue. H., Xu. B., Wu. J., and Wei. Y., Prediction of Temperature Rise Near Condensing Units in the Confined Space of a High-rise Building, Building and Environment, Vol. 42, pp.2480-2487, 2007. https://doi.org/10.1016/j.buildenv.2006.06.011
  6. Nada. S.A. and Said. M.A., Performance and Energy Consumptions of Split Type Air Conditioning Units for Different Arrangements of Outdoor Units in Confined Building Shafts, Applied Thermal Engineering, Vol.123, pp.874-890, 2017. https://doi.org/10.1016/j.applthermaleng.2017.05.104
  7. Nada. S.A. and Said. M.A., Solutions of Thermal Performance Problems of Installing AC Outdoor Units in Buildings Light Wells Using Mechanical Ventilations, Applied Thermal Engineering, Vol.131, pp.295-310, 2018. https://doi.org/10.1016/j.applthermaleng.2017.12.016
  8. Choi. S.H., Lee. K.S., and Kim. B.S., Analysis of the Condenser Performance Installed in the Air-Conditioning Plant Room of a High-Rise Building, Korea Journal of Air-Conditioning and Refrigeration Engineering, Vol.15, No.7, pp.586-894, 2003.
  9. Choi. S.H., Lee. K.S., and Kim. B.S., Effects of Stacked Condensers in a High-rise Apartment Building, Energy, Vol. 30, pp.968-981, 2004. https://doi.org/10.1016/j.energy.2004.08.004
  10. Hur. H., Seo. Y.M., Jeong. M., and Ha. M.Y., Effect of the Air-guide on Thermal Environment with Group Installation of System Air-conditioner Outdoor Unit, Journal of Computational Fluids Engineering, Vol.22, No.2, pp.21-27, 2017. https://doi.org/10.6112/kscfe.2017.22.2.021
  11. Reiter. S., Validation Process for CFD Simulations of Wind Around Buildings, EUROPEAN BUILT ENVIRONMENT CAE CONFERENCE, 2008.