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中文摘要：
基于均一入口流体温度假设和叠加原理建立了地下换热器变热流情形地下传热模拟半解析方法，并进行了验证，研究了热不平衡和热干扰对地下换热器动态特性的影响．研究表明，地下换热器各钻孔换热能力与热干扰大小有关．若地下换热器每年往地下排放的热量大于从地下吸取的热量，地下换热器出口流体温度呈现逐年上升的趋势．工程实例运行模拟表明，地下换热器连续运行10a，其出口流体温度与第一年相比上升了约0．8℃；地下换热器钻孔受到的热干扰越大，散热能力越差．
英文摘要：
Based on the superposition principle and uniform inlet fluid temperature assumption, the semi- analytical solution to heat transferring of ground heat exchangers （GHEs） with varying heat fluxes was built and validated. The effects of load imbalance and heat interference were further examined. Results indicate that the heat transfer capacity for individual boreholes in GHE depends on the strength of heat interference. If the heat rejected into the ground is greater than the heat absorbed from the ground, the outlet fluid temperature of GHE increases gradually every year. Case study indicates that the outlet fluid temperature of GHE, compared with that in the first year, increases about 0. 8 ℃ in the 10th year. The capacity of heat rejection for the GHE becomes smaller with stronger heat interference.
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