基于换热能效度的竖直地埋管埋设深度设计
Design of buried depth for vertical ground heat exchangers based on the energy efficiency degree
摘要：
根据地埋管传热特性，提出了地埋管换热能效度概念。建立了竖直地埋管换热器的三维传热模型，模拟计算了地埋管换热器能效度在不同埋设深度条件下的分布。揭示了区段能效度的迁移特性，将地埋管换热区域沿埋设深度范围分为无效换热区域和有效换热区域，并给出了基于换热能效度的地埋管换热器长度设计方法。
关键词：地源热泵 地埋管换热器 能效度 迁移特性
Abstract：
Based on the heat transfer characteristics of ground heat exchangers (GHEs), puts forward the concept of energy efficiency degree. Establishes the three-dimensional heat transfer model of vertical GHEs and simulates the energy efficiency degree distribution with different buried depths. Reveals migrating properties of the zonal energy efficiency degree, divides the heat transfer region of GHEs into the ineffective region and the effective region along the buried depth, and recommends some design methods of GHEs on the basis of the heat transfer energy efficiency degree.
Keywords:ground source heat pump, ground heat exchanger (GHE), energy efficiency degree, migrating property