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Numerical simulation on heat transfer characteristics of soil around U-tube underground heat exchangers.

Author(s) : YANG W., LI S., ZHANG X.

Summary

Temperature distribution in the soil around the underground heat exchangers are simulated by a two-dimensional model based on the column heat source theory, with the help of user interface tool-pdetool of matlab software. Through single-tube model, temperature distribution around heat exchangers and thermal radius under such conditions were got. In order to find out heat coupling effect among adjacent boreholes and temperature distribution in the soil, multiple boreholes were simulated on the basis of single-tube model, the coupling degree between tubes was got as well, from which, a concept (heat affected public area) is proposed. To eliminate or decrease the heat imbalance of heat emitted to soil in summer and absorbed from the soil in winter, water heater was added to the GSHP system. Experimental results of the hybrid system show the highest EER of the system could rise to 4.

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Details

  • Original title: Numerical simulation on heat transfer characteristics of soil around U-tube underground heat exchangers.
  • Record ID : 2009-1487
  • Languages: English
  • Source: 2008 Purdue Conferences. 19th International Compressor Engineering Conference at Purdue & 12th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
  • Publication date: 2008/07/14

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