Hebei Engineering University
Natural Science Foundation of Hebei Province (No. e202002052); Hebei talent training project (No. a201901014)
对于热负荷占优的寒冷地区，土壤源热泵系统长期运行使得土壤温度逐年降低，非采暖季利用空气源热泵为地埋管换热系统进行蓄热可有效地解决土壤热平衡问题。以实际工程为支撑，对空气源热泵-地埋管换热系统进行蓄热性能测试，结果表明：系统平均制热量可达到空气源热泵额定制热量的2.17倍，系统平均能效比为7.2，地埋管循环介质平均温差为4.5 ℃，系统运行稳定。基于TRNSYS软件对蓄热过程进行模拟，结合实验数据验证模型正确性，结果表明：经蓄热后土壤温度从初始的15.8 ℃上升至16.4 ℃。蓄热期间，采用多目标优化法得到空气源热泵蓄热系统全天运行时最优工况：循环水泵总流量为100 m3/h、空气源热泵总额定制热量为723.7 kW，在此工况下土壤目标温升为3.0 ℃时，系统能耗为474 820.0 kWh，增加的蓄热运行费用为3.96元/m2。与传统热源燃煤、燃气、热电联产蓄热方式相比，空气源热泵蓄热系统的能源与环境效益显著。
The difference in cooling and heating loads in cold regions makes the soil temperature decrease year by year during long-term operation of the soil source heat pump system. The research shows that the use of air source heat pump to store heat for the buried pipe heat exchange system in the non-heating season can effectively solve the problem of soil heat balance. Based on the actual project, the heat storage performance test of the air source heat pump-buried pipe heat exchange system was carried out, the results show that the average heating capacity of the system can reach 2.17 times the rated heat capacity of the air source heat pump, and the average energy efficiency ratio of the system is 7.2, the average temperature difference of the circulating water in the buried pipe is 4.5 ℃, and the system runs stably. The thermal storage process was simulated by TRNSYS software, and the correctness of the model was verified by combining the experimental data, the results showed that the soil temperature increased from the initial 15.8 ℃ to 16.4 ℃ after thermal storage. During the heat storage period, the multi-objective optimization method was used to obtain the optimal working conditions of the air source heat pump-buried pipe heat storage system in all-day operation: the total flow of the circulating water pump is 100 m3/h, the total customized heat of air source heat pump is 723.7 kW. When the lower soil target temperature rise is 3.0 ℃, the energy consumption of the system is 474 820.0 kWh, and the increased heat storage operation cost is 3.96 yuan/m2. Compared with the traditional heat source coal, gas, and cogeneration heat storage methods, the energy and environmental benefits of the air source heat pump heat storage system are significant.
鲍玲玲,崔军艳,李永,等. 空气源热泵-地埋管换热系统蓄热性能研究[J]. 科学技术与工程, , ():复制