深圳大学学报理工版

为研究亚热带地区山岭隧道衬砌换热器地源热泵系统的长期性能，建立制冷模式下隧道衬砌换热器与热泵耦合的瞬态传热三维数值模型，并通过现场热响应试验进行验证.以中国深圳市某隧道工程为依托，计算分析隧道衬砌换热器地源热泵系统持续运行10a的换热性能.计算结果表明：运行第10年的热交换管最高进、出口温度分别为36.96℃和33.46℃，满足热泵正常工作的温度范围，比第1年都仅提升了0.06℃；运行第10年的地源热泵最低能效比为4.76，满足地源热泵能效比的要求，且相较于第1年，最低能效比仅下降了0.01；系统运行10a后，隧道围岩温度场的影响深度约为8m.在山岭隧道洞内通风作用下，隧道衬砌换热器周围的围岩地温场可实现自恢复，山岭隧道衬砌换热器地源热泵系统用于亚热带地区建筑制冷是可行的.

To investigate the long-term performance of ground source heat pump connected to the mountain tunnel lining heat exchangers in subtropical region，a three-dimensional numerical model for the coupled heat transfer of heat pumps and tunnel lining GHEs was developed under the cooling condition. The validity of the heat transfer model was verified by the measured data of field thermal response tests. Based on a tunnel in Shenzhen，the heat transfer performance of ground source heat pump system connected to the tunnel lining heat exchanger under 10 years continuous operation was calculated and analyzed. The results show that the maximum inlet and outlet temperatures of the absorber pipe in the tenth year are 36.96 ℃ and 33.46 ℃，both of which meet the normal operating temperature range of the heat pump and only increase by 0.06 ℃ compared with the first year. The minimum energy efficiency ratio（EER）of the ground source heat pump in the tenth year is 4.76，which meets the EER requirement of the ground source heat pump，and the minimum EER only decreases by 0.01 compared to the first year. After 10 years’operation of the system，the influencing depth for the temperature field of tunnel surrounding rock reaches approximately 8 m. Under the condition of tunnel ventilation in mountain regions，the temperature field of surrounding rock around the tunnel lining GHEs can realize a self-recovery，and the ground source heat pump connected to the mountain tunnel lining GHEs is feasible for the building cooling in subtropical region.

引言
1 传热模型
2 数值模型
3 结果及分析
4 结论

图1 隧道衬砌换热器数值模型Fig. 1 Numerical model of tunnel lining GHEs

表1 材料参数表Table 1 Material parameters

图2 年气温变化Fig. 2 Annual temperature variation

图3 换热器热交换管出入口温度实测和数值结果Fig. 3 Numerical and experimental inlet/outlet temperatures of GHEs heat exchange pipe

图4 热交换管进出口温度的变化Fig. 4 Variation of inlet and outlet temperatures of absorber pipe with time

图5 热交换管周围衬砌的平均温度变化Fig. 5 Variation of temperature of tunnel lining around absorber pipe with time

图6 第10年夏季和冬季隧道衬砌换热器温度云图Fig. 6 Temperature nephogram of tunnel lining ground heat exchangers in the tenth year

图7 不同深度处的衬砌和围岩温度Fig. 7 Variation of temperature of tunnel lining and surrounding rock under different depths

图8 地源热泵能效比变化Fig. 8 Variation in EER of ground source heat pump

图9 隧道衬砌换热器负荷与热泵功率变化Fig. 9 Variation of tunnel lining heat exchange load and heat pump power

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备注

引言

1 传热模型

2 数值模型

3 结果及分析

4 结论

期刊信息

备注

引言

1 传热模型

2 数值模型

3 结果及分析

4 结 论

期刊信息

4 结论