太阳能地下混凝土储热系统数值模拟与实验研究

通过太阳能地下储热系统实验平台,对太阳能地下储热过程中地下温度场的变化规律进行了理论和实验研究。依据柱源理论建立了地下混凝土桩内埋管换热器的瞬态传热模型,模拟分析了地下温度场的变化规律。同时进行了太阳能地下混凝土储热系统的储热实验,从实测数据的角度对埋管换热器周围温度场的分布规律进行了考察和分析。太阳能地下混凝土储热技术,可有效解决太阳能利用中的不稳定性和间断性问题,充分利用地下空间,实现太阳能的长期、稳定和有效利用。

Numerical Simulation of and Experimental Research on Solar Energy Underground Thermal Storage System

The theoretical and experimental research are carried out on the changing law of the underground temperature field in the course of storage of solar energy underground through the experimental platform of the solar energy underground storage system.The transient heat transfer model is created for the heat exchanger buried between the underground concrete piles on the basis of the cylindrical heat source theory, and the changing law of the underground temperature field is simula-ted.Storage of solar energy underground is tested of the thermal storage system, and the distribution of the temperature field around the buried heat exchanger is investigated in light of the measured data.The technology of solar energy storage in un-derground concrete can eliminate instability and discontinuity in use of solar energy, make use of underground space, and achieve the long-term, stable and effective use of solar energy.