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建立了地热热储二维分布模型,对地热生产过程中地热热储的压力响应和冷却效应进行了数值模拟,提出了利用地热尾水回灌和井内换热相结合的新型对井系统。该系统采用采水井内换热器和地面套管式换热器,既可节省保温费用,又可减少散热损失。根据井筒传热模型,建立了井内换热器优化设计方法,得出了井内换热器的最佳长度为360 m。
A two-dimensional model of geothermal heat storage was established to simulate the pressure response and cooling effect of geothermal heat storage in geothermal production. A new well system using geothermal tailrace recharge and well heat exchange was proposed. The system uses water wells and heat exchangers on the ground casing heat exchanger, can save heat costs, but also reduce heat loss. According to wellbore heat transfer model, the optimal design method of wellbore heat exchanger was established. The optimal length of wellbore heat exchanger was obtained as 360 m.