湖南地区土壤源热泵冬季运行模式的实验研究

为研究土壤源热泵运行时土壤温度变化规律及换热器的换热能力,对湖南地区一套土壤源热泵系统进行了冬季取热实验。实验结果表明,在连续运行工况下,热泵运行48 h后土壤温度变化较小,土壤温度平均下降了6.4℃,单位井深换热量从36.96 W/m降低到28.01 W/m;在间歇运行工况下,分别以开停时间比为8 h:16 h和12 h:12 h为例,与连续运行相比,土壤温度分别提高了2.1℃和1.3℃,单位井深换热量分别提高了15.1%和8.5%。

Experimental Study on Winter Operation Characteristics of Soil Source Heat Pump in HUNAN

In order to research the variation laws of soil temperature and heat transfer ability of embedded heat exchangers in soil source heat pump, an experimental study on winter heat extraction of soil source heat pump system was operated. The results indicated that the soil temperature changed little after the heat pump ran 48 hours, and the decrease of soil tempera- ture was 6.55 ℃, and the unit depth of the heat reduces from 36.93w/m to 28.01w/m under continuous operation. In the intermittent operation conditions, and to start stop time ratio of 8h： 16h and 12h：12h, for example, compared with continuous operation, soil temperature were increased by 2.1 ℃ and 1.3 ℃, the unit well depth change heat increased by 15.1% and 8.5 % respectively.