Share

Comparative analysis on soil temperature fields of inner and outside tube groups in stably operated GSHP system.

[In Chinese. / En chinois.]

Author(s) : LIU Y., ZHANG F., YANG B., et al.

Type of article: Article, Case study

Summary

Based on a practical project in shanghai, this paper will give a yearly test on single U-shaped ground heat exchanger of ground-source heat pump in central air conditioning system, and analyzes the change of surface ground temperature field, inner ground temperature field and outer ground temperature field of the pipes. The test results show that: throughout the year , temperature fluctuation is larger in the shallow soil (more than 25m depth)which is outside the tube group , and time of the highest temperature of the shallow soil appears later than that on the ground . In the inside tube group, the soil temperature will increase along with the system’s continuous and steady operation. Thus, it makes the temperature difference smaller between the surface of the ground heat exchanger and soil temperature around, which leads to the heat exchange capacity decline. Through the contrast analysis,this paper also found that ,for buildings where ground source heat pump is used and its cooling load is greater than the heating load , the impact of the system`s continuous and steady operation on the heat transfer between buried pipes and soil is significantly higher in the summer than that in the winter. At the same time, the experiment results prove that, increasing borehole space and intermittent operation of the ground source heat pump system are very important to enhance the heat exchange between the buried tube heat exchanger and soil.

Available documents

Format PDF

Pages: 75-80

Available

  • Public price

    20 €

  • Member price*

    15 €

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details


Links


See other articles in this issue (8)
See the source

Indexing