Research on cross-seasonal thermal storage performance of W-type buried pipe systems

doi:10.3969/j.issn.1006-6535.2025.04.020

Abstract

Abstract: To explore the impact of buried pipe design parameters on thermal storage, a numerical simulation model for W-type buried pipe cross-seasonal thermal storage systems was developed, and the effects of inlet temperature, velocity, well spacing, and burial depth on thermal storage performance were analyzed. The study shows that the underground temperature field changes most significantly along the radial direction during cross-seasonal thermal storage. A velocity of 0.6 m/s is optimal for the circulating fluid in the buried pipe as it balances thermal storage efficiency and energy consumption. Increasing the inlet fluid temperature of the system widens the temperature fluctuation range within the pipe but also increases heat loss. Under a hexagonal tube cluster layout, the optimal well spacing increases with the depth of the buried pipe. The research findings provide a theoretical basis for the design and optimization of cross-seasonal thermal storage systems of buried pipes.

Key words: cross-seasonal thermal storage, W-type buried pipe, thermal storage performance, well cluster layout, temperature field

CLC Number:

TK115

ZHANG Jie, NIU Chen, YU Chunyu. Research on cross-seasonal thermal storage performance of W-type buried pipe systems[J]. Special Oil & Gas Reservoirs, 2025, 32(4): 167-174.

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