Heat Extraction and Recover of Deep Borehole Heat Exchanger: Negotiating with Intermittent Operation Mode Under Complex Geological Conditions

Highlights● A robust, efficient and easy implemented model is proposed for deep borehole heat exchanger● The long-term heat extraction/recovery ability of deep borehole heat exchanger is verified● Analysis on geological conditions can provide guides for drilling site selection● The deep borehole array with heat extraction and recover is demonstrated