Research on Characteristics of the Soil Temperature Field around Vertical Double U-Tube Group of the Heat Exchangers

Abstract:

Based on the temperature monitoring for the double U-tube wells with thermal resistance , numerical simulation researching on two-dimensional temperature field and three-dimensional temperature field was carried out for vertical double U-tube group. Under the condition of 6.5m for horizontal spacing of tube well, the Soil temperature around inner tube wells increases 0.4°C in one year, and 0.24°C for the surrounding tube wells. The paper calculates the increasing temperature of the tube wells, 7.95°C for inner tube wells and 4.70°Cfor surrounding tube wells. The soil temperature of tube wells is rising with the running time increasing, however,the temperature rate of the soil around inner tube wells is larger than the surrounding tube wells’.

• Periodical: Applied Mechanics and Materials (Volumes 170-173)
• Pages: 2558-2563
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.170-173.2558
• Online since: May 2012
• Authors: Jun Yang, Xiao Ping Miao, Xiao Feng Zhou, Xin Ping Wu
• Keywords: Inner Tube Wells, Numerical Simulation, Surrounding Tube Wells, Temperature Field, Vertical Double U-Tube Group

References

[1] Li Xinguo, Zhao Jun, Zhou Qian.Numerical simulation on the ground temperature field around U-pipe underground heat exchangers [J]. ACTA ENERGIAE SOLARIS SINICA,2004,25 (6): 703～707.

[2] Pahuda D,Matthey B.Comparison of the Thermal performance of double U-64pipe borehole heat exchangers measured in situ[J].Energy and Buildings,2001,33:503-507.

DOI: 10.1016/s0378-7788(00)00106-7

[3] Arif H M,Tolga B.A study on modeling and performance sssessment of a heat pump system for utilizing low temperature geothermal resources in buildings[J].Building and Environment,2007,42(10)：3747—3756.

DOI: 10.1016/j.buildenv.2006.09.003

[4] Urchueguia J F,Zacares M,Corberran J M,etc.Comparison between the energy performance of a ground coupled water to water heat pump system and an air to water heat pump system for heating and cooling in typical conditions of the European mediterranean coast [J].Energy Conversion and Management,2008,49(10)：2917—2923.

DOI: 10.1016/j.enconman.2008.03.001

[5] Onder O,Arif H.Modeling and performance evaluation of ground source(geotherma1)heat pump systems[J].Energy and Buildings,2007,39(1)：66-75.

DOI: 10.1016/j.enbuild.2006.04.019

[6] Shiba T, Bejan A. Thermodynamic optimization of geometric structure in the counter flow heat exchanger for an environmental control systems. Energy 2001;26:493–511.

DOI: 10.1016/s0360-5442(01)00011-1

[7] Hoseyn Sayyaadi , Emad Hadaddi Amlashi, Majid Amidpour.Multi-objective optimization of a vertical ground source heat pump using evolutionary algorithm , Energy Conversion and Management 50 (2009) 2035–2046.

DOI: 10.1016/j.enconman.2009.04.006

[8] Hadaddi E, Sayyaadi H, Behbahaninia A. Thermoeconomic analysis of ground source heat pump. In: The third international green energy conference, 17–21 June, Vasteras, Sweden; 2007.