Abstract
Ground-coupled heat pump (GCHP) has been widely used as an energy-saving and environment-friendly heating and cooling system. But for the buildings in cold regions, because the heat extracted from ground is much larger than the heat rejected into it, the ground cannot keep thermal balance and consequently the soil temperature will decrease year by year. With the decrease of the soil temperature, the ground-coupled heat pump system declines in performance or even stops running after a longtime operation. This paper aims at specifically revealing the phenomenon of soil temperature decrease in cold regions by an integrated dynamic simulation. 10 year’s dynamic soil temperatures of GCHP used for just heating and for both heating and cooling in four typical cities are simulated and compared. The results show that the office building using GCHP just for heating has a severer soil temperature decrease: the temperature drop is respectively 11.7 °C in Harbin, 9.6 °C in Shenyang, 9.0 °C in Beijing, 5.8 °C in Zhengzhou. For the system with both heating and cooling, the soil temperature drop is 8.2 °C and 3.4 °C in Harbin and Shenyang, while the soil temperature rise is 0.02 °C and 5.5 °C in Beijing and Zhengzhou. The results of simulation are valuable for the design and operation of GCHP system applied in cold region.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
İnallı M, Esen E (2004) Experimental thermal performance evaluation of a horizontal ground-source heat pump system. Appl Therm Eng 24(14–15):2219–2232
John WL, Derek HF, Tonya LB (2011) Direct utilization of geothermal energy 2010 worldwide review. Geothermics 40(3):159–180
Pawel O (2004) The Possibility of Using the Ground as a Seasonal Heat Storage: The Numerical Study. ASME Conference Proceedings 2(Parts A and B): Computational Fluid Dynamics and Heat Transfer
Ozgener O, Hepbasli A (2007) Modeling and performance evaluation of ground source (geothermal) heat pump systems. Energ Build 39(1):66–75
Sannera B, Karytsasb C, Mendrinosb D et al (2003) Current status of ground source heat pumps and underground thermal energy storage in Europe. Geothermics 32(4–6):579–588
Zhai XQ, Qu M, Yu X et al (2011) A review for the applications and integrated approaches of ground-coupled heat pump systems. Renew Sust Energ Rev 15(6):3133–3140
Yang W, Zhou J, Xu W et al (2010) Current status of ground-source heat pumps in China. Energ Policy 38(1):323–333
Lund J, Sanner B, Rybach L et al (2004) Geothermal(ground-source) heat pumps: A world overview. GHC Bull 9:1–10
Hepbasli A, Akdemir O, Hancioglu E (2003) Experimental study of a closed loop vertical ground source heat pump system. Energ Convers Manage 44(4):527–548
Klein SA et al (1994) TRNSYS: a Transient Simulation Program. University of Wisconsin, Solar Energy Laboratory
Qu YX, Fang ZH, Zhang LH et al (2003) The economic analysis of ground-coupled heat pump by using the solar energy as an assisted source. Renew Energ 1:8–10 (in Chinese)
Li SH, Yang WH, Zhang XS (2009) Soil temperature distribution around a U-tube heat exchanger in a multi-function ground source heat pump system. Appl Therm Eng 29:3679–3686
Acknowledgments
The authors gratefully acknowledge the support from the Natural Science Foundation of China (grant No.51176084) and the National last five-year science and technology support project of China (grant No. 2011BAJ03B09).
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2014 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
You, T., Wu, W., Wang, B., Shi, W., Li, X. (2014). Dynamic Soil Temperature of Ground-Coupled Heat Pump System in Cold Region. In: Li, A., Zhu, Y., Li, Y. (eds) Proceedings of the 8th International Symposium on Heating, Ventilation and Air Conditioning. Lecture Notes in Electrical Engineering, vol 262. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-39581-9_44
Download citation
DOI: https://doi.org/10.1007/978-3-642-39581-9_44
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-39580-2
Online ISBN: 978-3-642-39581-9
eBook Packages: EngineeringEngineering (R0)