|
|
|
| ROCK-SOIL THERMAL RESPONSE TEST OF TUNNEL HEATING SYSTEM USING HEAT PUMP IN COLD REGION |
| ZHANG Guozhu1，2，XIA Caichu1，2，MA Xuguang3，LI Pan3，WEI Qiang3 |
(1. Department of Geotechnical Engineering，Tongji University，Shanghai 200092，China；2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education，Tongji University，Shanghai 200092，China；
3. China Railway 15th Bureau Group Co.，Ltd.，Luoyang，Henan 471013，China) |
|
|
|
|
Abstract In order to prevent freezing damage of tunnels in cold region，tunnel heating system using heat pump was introduced for the first time at Linchang tunnel in Inner Mongolia Autonomous Region of China. The rock-soil thermal response test was carried out to study the influence of the inlet temperature，flow rate and pipes distance on extracted heat and the influence of heat exchange on temperature field of surrounding rock and primary lining. It can be found that the extracted heat varies with the inlet temperature linearly and with flow rate exponentially. Although the extracted heat can be improved by increasing the flow rate，there is more resistance to fluid in heat exchange pipes，it will be uneconomical if the flow rate is great；it is suggested that the flow rate is no more than 0.75 m3/h. The affected depth of surrounding rock temperature is 75 cm when the heat exchange pipes distance is 100 cm，and is 100 cm when the heat exchange pips distance is 50 cm. The less the heat exchange pipes distance，the greater the affect depth of surrounding rock temperature and the temperature increment.
|
|
Received: 28 June 2011
|
|
|
|
| [1] 夏才初，张国柱，曹诗定，等. 寒区公路隧道防冻保暖技术及其发展趋势[C]// 2009年全国公路隧道学术会议. 兰州：[s.n.]，2009：13–19.(XIA Caichu，ZHANG Guozhu，CAO Shiding，et al. Antifreeze and warmth retention technology and development trend of road tunnel in frigid areas[C]// 2009 National Conference on Road Tunnel. Lanzhou：[s.n.]，2009：13–19.(in Chinese))
[2] BRANDL H. Energy foundations and other thermo-active structures[J]. Geotechnique，2006，56 (2)：81–122.
[3] ADAM D，MARKIEWICZ R. Energy from earth-coupled structures，foundation，tunnel and sewers[J]. Geotechnique，2009，59(3)：229–236.
[4] IALAM M S，FUKUHARA T，WATANABE H，et al. Horizontal U-tube road heating system using tunnel ground heat[J]. Journal of Snow Engineering of Japan，2006，22(3)：23–28.
[5] IALAM M S，FUKUHARA T，WATANABE H. Simplified heat transfer model of horizontal U-tube(HUT) system[J]. Journal of Snow Engineering of Japan，2007，23(3)：232–239.
[6] 夏才初，曹诗定，王 伟. 能源地下工程的概念、应用与前景展望[J]. 地下空间与工程学报，2009，5(3)：419–424. (XIA Caichu，CAO Shiding，WANG Wei. An introduction to energy geotechnical engineering[J]. Chinese Journal of Underground Space and Engineering，2009，5(3)：419–424.(in Chinese))
[7] 曹诗定. 能源地铁车站主要热交换构件传热计算方法研究[硕士学位论文][D] 上海：同济大学，2009.(CAO Shiding. Study of the calculation method of main heat-exchangers in energy subway station[M. S. Thesis][D]. Shanghai：Tongji University，2009.(in Chinese))
[8] 中华人民共和国国家标准编写组. GB50366—2009 地源热泵系统工程技术规范[S]. 北京：中国建筑工业出版社，2009.(The National Standards Compilation Group of People?s Republic of China. GB50366—2009 Technical code for ground-source heat pump system[S]. Beijing：China Architecture and Building Press，2009.(in Chinese))
[9] LI X，CHEN Y，CHEN Z，et al. Thermal performances of different types of underground heat exchangers [J]. Energy and Building，2006，38(5)：543–547.
[10] GAO J，ZHANG X，LIU J，et al. Thermal performance and ground temperature of vertical pile-foundation heat exchangers：a case study[J]. Applied Thermal Engineering，2008，28(17/18)：2 295–2 304. |
| [1] |
MAO Yuting1, 2, HE Manchao1, 2, LIU Fangzhou3, BAI Xing4, YANG Xiaojie1, 2, TAO Zhigang1, 2*. Development and application of a large-scale physical model system for tunnel creep testing[J]. , 2026, 45(6): 1627-1638. |
|
|
|
|
2012, Vol. 31 
