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Experimental and numerical study on the attenuation and recovery characteristics of ground temperature during deep-buried pipe heat transfer

Energy and Buildings, ISSN: 0378-7788, Vol: 307, Page: 113961
2024
  • 1
    Citations
  • 0
    Usage
  • 0
    Captures
  • 1
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

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  • Citations
    1
  • Mentions
    1
    • News Mentions
      1
      • News
        1

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Findings from Chang'an University Provides New Data on Energy and Buildings (Experimental and Numerical Study On the Attenuation and Recovery Characteristics of Ground Temperature During Deep-buried Pipe Heat Transfer)

2024 APR 16 (NewsRx) -- By a News Reporter-Staff News Editor at Energy Daily News -- Current study results on Energy - Energy and Buildings

Article Description

The ground temperature around a deep-buried pipe is an essential factor affecting its heat transfer performance. In this study, experiments were designed and a distributed optical fiber temperature measurement system was used to monitor real-time ground temperature based on the practical heat transfer engineering of buried pipes. Furthermore, a full-scale numerical model was developed for buried pipe heat transfer based on field experiments, and the response characteristics of ground temperature with buried pipe heat transfer were analyzed. The experimental and numerical study results indicated that the increase rate of heat transfer intensity corresponding to per unit increase in flow rate ranged from 2.04 % to 2.80 %. The recovery of ground temperature can be divided into three stages: fast, slow, and quasi-steady. After 74 h of heat extraction, the durations of the corresponding three recovery stages were 0–120 h, 120–360 h, and greater than 360 h, respectively. After the natural recovery, the intermediate layer experienced the best ground temperature recovery, followed in second place by the deep layer, while the shallow layer exhibited the worst. In addition, the ground temperature recovery rate decreased linearly with the increase in cumulative heat extraction of the buried pipe.

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