WEI Yeqing,KONG Gangqiang,ZHANG Jibing,et al.Field Tests on Thermal Responses of Energy Utility Tunnel under Intermittence or Continuous Operation Mode[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(03):579-585.
WEI Yeqing,KONG Gangqiang,ZHANG Jibing,et al.Field Tests on Thermal Responses of Energy Utility Tunnel under Intermittence or Continuous Operation Mode[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(03):579-585. DOI: 10.13409/j.cnki.jdpme.20211113001.
Field Tests on Thermal Responses of Energy Utility Tunnel under Intermittence or Continuous Operation Mode
Energy utility tunnel is one of the new types of energy geostructures, which can be used for economical and efficient utilization of shallow geothermal energy and regulation of tunnel temperature, as well as reduction of operation and maintenance costs. Based on the utility tunnel project in Nanjing Software Valley, heat exchange pipes were embedded in the bottom, side, and top plates of utility tunnel structures. The inlet/outlet water temperatures, the temperatures and thermal-induced stress of the bottom plate were measured. The heat transfer performances and structure thermal responses of utility tunnels under different operation models were briefly discussed. The results show that the heat transfer performance of energy tunnels under intermittence mode is similar to this under the continuous mode, while the thermal-induced stress can be reduced by about 50%. Under the experimental conditions of this study, in the intermittence and continuous mode, the heat transfer efficiencies of the energy tunnel are 83.6 and 82.5 W/m
2
, respectively; the thermal-induced tensile stresses of the energy tunnel are 0.63 and 1.30 MPa, respectively; the thermal-induced compressive stress of adjacent tunnel is 0.23 MPa.
关键词
Keywords
references
Moore J N , Simmons S F . More power from below [J]. Science , 2013 , 340 ( 6135 ): 933 - 934 .
Loveridge F , Mccartney J S , Narsilio G A , et al . Energy geostructures: a review of analysis approaches, in situ testing and model scale experiments [J]. Geomechanics for Energy and the Environment , 2020 , 22 : 100173 .
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 ): 229 - 234 .
Adam D , Markiewicz R . Energy from earth-coupled structures, foundations, tunnels and sewers [J]. Géotechnique , 2009 , 59 ( 3 ): 229 - 236 .
Buhmann P , Moormann C , Westrich B , et al . Tunnel geothermics-A German experience with renewable energy concepts in tunnel projects [J]. Geomechanics for Energy and the Environment , 2016 , 8 : 1 - 7 .
Barla M , Di Donna A , Insana A . A novel real-scale experimental prototype of energy tunnel [J]. Tunnelling and Underground Space Technology , 2019 , 87 : 1 - 14 .
Zhu Z N , Guo H X . Exploration on construction of geothermal-utilized shield tunnels: a case study of fabrication and installation of tunnel energy segments in Qinghuayuan tunnel [J]. Tunnel Construction , 2019 , 39 ( 4 ): 677 - 683 . (in Chinese)
Guo H X , Meng J W , Zhu Z N . Numerical analysis and applicability evaluation of thermal response test in energy tunnels [J]. Journal of Disaster Prevention and Mitigation , 2019 , 39 ( 4 ): 572 - 578 . (in Chinese)
Bidarmaghz A , Narsilio G A . Heat exchange mechanisms in energy tunnel systems [J]. Geomechanics for Energy and the Environment , 2018 , 16 : 83 - 95 .
Ogunleye O , Singh R M , Cecinato F , et al . Effect of intermittent operation on the thermal efficiency of energy tunnels under varying tunnel air temperature [J]. Renewable Energy , 2020 , 146 : 2646 - 2658 .
Cousin B , Loria A F R , Bourget A , et al . Energy performance and economic feasibility of energy segmental linings for subway tunnels [J]. Tunnelling and Underground Space Technology , 2019 , 91 : 102997 .
Barla M , Di Donna A , Perino A . Application of energy tunnels to an urban environment [J]. Geothermics , 2016 , 61 : 104 - 113 .
Zhang G , Xia C , Yang Y , et al . Experimental study on the thermal performance of tunnel lining ground heat exchangers [J]. Energy and buildings , 2014 , 77 : 149 - 157 .
Zhang G Z , Xia C C , Ma X G , et al . Rock-soil thermal response test of tunnel heating system using heat pump in cold region [J]. Chinese Journal of Rock Mechanics and Engineering , 2012 , 31 ( 1 ): 99 - 105 . (in Chinese)
Lee C , Park S , Choi H J , et al . Development of energy textile to use geothermal energy in tunnels [J]. Tunnelling and Underground Space Technology , 2016 , 59 : 105 - 113 .
Ji W W , Kong G Q , Liu H L , et al . Field tests on thermal response characteristics of energy tunnel in soft plastic loess area [J]. Rock and Soil Mechanics , 2021 , 42 ( 2 ): 558 - 564 . (in Chinese)