Discusses the determination of loop modes, pipe material, pipe spacing, working liquid in the pipes in buried heat exchanger systems and the maintenance of the heat balance of the underground rock.

• 摘要讨论了地下埋管系统环路方式、埋管材料、埋管间距、埋管内工作流体的确定以及地下岩土热平衡的维持等问题。