Modelling and evaluation of cooling capacity of earth-air-pipe systems

Huijun Wu, Shengwei Wang, Dongsheng Zhu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

111 Citations (Scopus)


Earth-air-pipe systems can be used to reduce the cooling load of buildings in summer. A transient and implicit model based on numerical heat transfer and computational fluid dynamics was developed to predict the thermal performance and cooling capacity of earth-air-pipe systems. Superposition technology is used in the model, incorporating the natural ground temperature field and the turbulent air flow inside the buried pipe. The model developed is validated against experimental investigations on an experimental set-up in Southern China. Good agreement between simulated results and experimental data is obtained. The model is then implemented on the CFD (Computational Fluid Dynamics platform), PHOENICS, to evaluate the effects of the operating parameters (i.e. the pipe length, radius, depth and air flow rate) on the thermal performance and cooling capacity of earth-air-pipe systems. A daily cooling capacity up to 74.6 kW h can be obtained from an earth-air-pipe system installed in that region.
Original languageEnglish
Pages (from-to)1462-1471
Number of pages10
JournalEnergy Conversion and Management
Issue number5
Publication statusPublished - 1 May 2007


  • Cooling capacity
  • Earth-air-pipe
  • Energy conservation
  • Soil temperature
  • Space cooling
  • Thermal performance

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology

Cite this