地热利用中的地温可恢复特性及其传热的增强

Underground temperature restoration characteristics and enhancement heat transfer in geothermal energy utilization

在地源热泵(GSHP)地能利用中,通过可控间歇过程,恢复地下温度,弥补土壤传热慢的不足。间歇过程可使热量充分扩散及地温得以恢复,提高地下换热负荷,以最少的井孔数布置,最大程度地发挥每一换热单元的换热能力。间歇时间可能改变温度变化的规律和趋势,实现良好的热泵机组运行工况以及系统的配置运行。因此,所提出的可控间歇技术对未来利用和发展地能供热供冷系统具有重要意义和实用价值。

In ground source heat pump (GSHP) of geothermal energy utilization system,a concept of intermittent process (GSHP on or off) was proposed to restore underground temperature and compensate insufficient soil and rock heat transfer.The intermittence helps full diffusion of terrestrial heat to promote temperature uniformity and boost underground heat transfer load.Thereby,the number of heat transfer well in GSHP system can be minimized because of better working condition of GSHP.