Abstract
The thermal short-circuiting problem between adjacent buried pipes is the key factor to restrain the efficient and sustainable operation of ground heat exchanger (GHE). In this paper, based on the constructal theory, a novel bionic tree-shaped GHE is proposed to solve the thermal short-circuiting problem and improve performance of GHE. The thermal performance and comprehensive performance of the bionic tree-shaped GHE were simulated by Fluent, and a comparison between the bionic tree-shaped GHE and serpentine GHE was conducted. The feasibility of the bionic tree-shaped GHE for solving the thermal interference problem of adjacent buried pipes and improving the system efficiency was analyzed. The results indicated that the new bionic tree-shaped GHE can effectively mitigate the thermal short-circuiting problem of adjacent buried pipe and avoid local heat accumulation. Meanwhile, the uniformity of soil temperature was improved. Furthermore, when the inlet velocity is in the range of 0.4—1.2 m/s, the comprehensive performance of bionic tree-shaped GHE is obviously better than that of serpentine GHE, with a value of 33.4%—38.3%.
| Translated title of the contribution | Simulation of novel bionic tree-shaped ground heat exchanger to mitigate thermal short-circuiting |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 134-139 |
| Number of pages | 6 |
| Journal | Huagong Xuebao/Journal of Chemical Industry and Engineering (China) |
| Volume | 72 |
| DOIs | |
| State | Published - Jul 2021 |
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