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Erschienen in:
2014 | OriginalPaper | Buchkapitel
8. Investigating the Thermal Performance of Horizontal Slinky Ground Heat Exchangers for Geothermal Heat Pump
verfasst von : Ping Cui, Jie Yang, Yun Lin, Zhaohong Fang
Erschienen in: Proceedings of the 8th International Symposium on Heating, Ventilation and Air Conditioning
Verlag: Springer Berlin Heidelberg
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Abstract
The horizontal ground heat exchanger (HGHE) with slinky-coiled pipes recently has been used as a heat source/sink for geothermal heat pump systems because of the significant lower initial cost. A simplified heat transfer model suitable for engineering design of the slinky HGHEs is developed. The model is based on the one-dimensional transient heat transfer in an infinite medium, considering the influence of the tube length per area and the different effects of long-term mean load and short-term intermittent load. A case study is carried out to design the HGHE size by using the proposed model. Some key factors which influence the performance of the HGHE are also discussed such as the thermal properties of the ground and the pipe length per area.