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Performance of a free-air cooling system for telecommunications base stations using phase change materials (PCMs): In-situ tests

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  • Sun, Xiaoqin
  • Zhang, Quan
  • Medina, Mario A.
  • Liao, Shuguang

Abstract

A free air cooling system that combines phase change material (PCM) with a natural cold source (i.e., cold air) was developed to reduce the space cooling energy consumption in telecommunications base stations (TBSs). Outside cold air, instead of air conditioning system was used to remove heat in the TBSs. In addition, a PCM technology was adopted to improve the mismatch between energy demand and supply on the electric grid. The proposed system was intended to operate in conjunction with existing air conditioning units within each TBS. Consequently, the running time the air conditioning units was reduced, resulting in energy and demand savings. A full scale prototype, herein referred to as latent heat storage unit (LHSU), was designed, built and tested in TBSs located in five different climatic regions in southwest and eastern China during different seasons. In addition, a mathematical model was developed to simulate the operation of the proposed LHSUs. Energy savings ratio (ESR) was used as the criterion to evaluate LHSU’s energy savings. The estimated average annual ESR in five climatic regions was approximately 50%, with a maximum value of 67%. The average percent running time in which the LHSU replaced the operation of conventional air conditioners was 82.6%, with values surpassing 75% in four of the five cities, and one city achieving a value of almost 100%.

Suggested Citation

  • Sun, Xiaoqin & Zhang, Quan & Medina, Mario A. & Liao, Shuguang, 2015. "Performance of a free-air cooling system for telecommunications base stations using phase change materials (PCMs): In-situ tests," Applied Energy, Elsevier, vol. 147(C), pages 325-334.
    • Handle: RePEc:eee:appene:v:147:y:2015:i:c:p:325-334
    DOI: 10.1016/j.apenergy.2015.01.046
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    References listed on IDEAS

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    10. Sorrentino, Marco & Acconcia, Matteo & Panagrosso, Davide & Trifirò, Alena, 2016. "Model-based energy monitoring and diagnosis of telecommunication cooling systems," Energy, Elsevier, vol. 116(P1), pages 761-772.
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    12. Pielichowska, Kinga & Nowak, Michał & Szatkowski, Piotr & Macherzyńska, Beata, 2016. "The influence of chain extender on properties of polyurethane-based phase change materials modified with graphene," Applied Energy, Elsevier, vol. 162(C), pages 1024-1033.
    13. Chen, Xiaoming & Zhang, Quan & Zhai, Zhiqiang John & Ma, Xiaowei, 2019. "Potential of ventilation systems with thermal energy storage using PCMs applied to air conditioned buildings," Renewable Energy, Elsevier, vol. 138(C), pages 39-53.
    14. Nie, Binjian & Palacios, Anabel & Zou, Boyang & Liu, Jiaxu & Zhang, Tongtong & Li, Yunren, 2020. "Review on phase change materials for cold thermal energy storage applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 134(C).
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