Abstract
Traditional way of heating is mainly by high grade fossil energy, as a device which consume part of high energy, heat pump can lead the heat flow from low temperature heat source to high temperature heat source as reported by Li (Conserv Environ Prot 11:66–67, 2004) [1], which is the most economic and effective technology to reduce CO2 emissions, is one of the key technology of building energy efficiency and reduce CO2 emissions. With the large-scale application of soil source coupling heat pump, the influence factors are also appeared. Accordingly, the effect of the groundwater flow on nest of tubes heat transfer performance is especially obvious. This paper simulated the fluid in the tube,the nest of tubes,the surrounding soil under storage conditions, based on the nest of tubes of heat seepage coupling heat transfer model. This paper studied the influences of groundwater seepage to the heat of nest of tubes, at the same time make a comparison to the no seepage condition. It shows that groundwater seepage compared to no seepage condition can effectively reduce the outlet temperature of the buried pipe. In the 80–400 m/y seepage velocity range, unit well depth in heat changes linearly with the seepage flow velocity roughly. If the seepage velocity is 500 m/y, its unit well depth in heat increases about 79.73 %. In the system design; we should consider this influence factor. Otherwise, there will be a great bias. When considering seepage factor, the heat transfer rate of per unit length increase, so we can reduce the design capacity, and thus make the system better and save the resources.
Keywords
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Abbreviations
- \( u \) :
-
Component of horizontal velocity (m/s)
- D :
-
Hydraulic diameter (m)
- T :
-
Temperature (°C)
- Q :
-
Average quantity of heat per meter (W/m)
- V :
-
Seepage velocity (m/y)
- q :
-
Average quantity of heat per meter (W/m)
- \( \phi \) :
-
Porous medium porosity, %
- \( S_{i} \) :
-
Added power source, J
- \( \upsilon \) :
-
Kinematic viscosity of water, m2/s
- f:
-
Fluid
- s:
-
Solid
- I:
-
Xx direction
- j:
-
Y direction
References
Li J (2014) Optimization of heat pump heating unit configuration. Conserv Environ Prot 11:66–67
Diao NR, Fang Z (2006) Ground source heat pump exchanger technology. Higher Education Press, Beijing
Shou QY, Chen R (2001) High efficiency and energy saving air conditioning—ground source heatpump. Energy Conserv 1:41–43
Fang R, Ma Z (2006) Heat transfer analysis of heat coupled seepage of underground borehole heat exchangers. HVAC 36:6–10
Hu J, Zhang YJ (2008) Numerical simulation of seepage flow field groundwater source heat pump system and its influence on temperature field. Glob Geol 11:182–187
Tan X, Ding L (2003) Theoretical analysis IMPACT underground loop heat exchanger design of groundwater flow. Refrig Air Cond Electr Power Mach 93:14–16
Huang Y, Chen G (2003) Ground source heat pump research and application. Refrig Air Cond Electr Power Mach 89:6–10
Xinjue X, Yantian Y (2002) A study on relation between groundwater flow and the design of ground-coupled HP system with borehole. Jpn Geotherm Mag 24:339–348
Yang W, Dong H (2003) Research status and prospects of ground source heat pump system building. Energy 20:34–40
Tan X, Ding L (2003) Theoretical analysis of the impact of groundwater flow in the underground loop heat exchanger design. Refrig Air Cond Electr Power Mach
Teng J (2002) Optimization of groundwater flow in geothermal heat exchanger systems well configured. Geotherm Soc Jpn 24:105–191
Eskilson P (1987) Thermal analysis of heat extraction boreholes, Doctoral thesis, Lund University, Sweden
Liu X, Wang Y, Mingming H (1999) Experimental study of ground source heat pump underground heat exchanger is vertical. Chongqing Jianzhu Univ 21:20–26
Liu X, Wang Y, Mingming H (1999) Experimental study on ground source heat pump for winter heating and summer cooling. Water Electr Constr Mach 30:14–22
Yuandan Li X, Zhang YZ (2001) Experimental study on the characteristics of ground source heat pump in winter conditions start. HVAC 31:17–20
Zhang X, Gao X, Qin H (2000) Experimental study of soil and sand mixture and thermal conductivity. In: Proceedings of 2000 annual conference national HVAC, pp 478–482
Wei X, Li Y, Lin Y (2003) Earth source heat pump. Hunan Univ (Natural Sciences) 27:62–65
Diao N, Li Q, Fang Z (2003) Analytical Solutions geothermal heat exchanger temperature response when seepage, Shandong Institute of Architectural Engineering
Rui F (2006) Theoretical and experimental study of underground pipe heat storage and soil infiltration coupled heat pump system, Harbin Institute of Technology doctoral thesis
Lei H, Hu P, Lei F (2011) Effect of heat pipe groundwater seepage of ground source heat pump system underground. Natl HVAC 53:234–237
Lian X, Liu J, Chen X (2008) Numerical simulation vertical U-type ground heat exchanger. SOLAR 33:48–55
Cai J, Chen R, Wang J (2009) Analysis of thermal heat exchanger. Fluid Mach 37:62–68
Ma Z, Lv Y (2007) GSHP system design and application, Machinery Industry Press
Li G (2011) Analysis of groundwater flow borehole heat exchangers for ground effects. Const Sci 18:62–64
Li X, Chen Z, Zhao J (2006) Simulation and experiment on the thermal performance of U-vertical ground coupled heat exchanger. Appl Therm Eng 26:1564–1571
Liu XY, Wang Y, Hu MW, Tang D (2004) Experimental research on vertical buried tube type of underground exchanger for ground-source heat pump. Fac Urban Const Eng Chongqing Jianzhu Univ 21:56–59
Wang FJ (2004) CFD computational fluid dynamics analysis software principle and application. Tsinghai University Press, Beijing
Xu W (2007) Chinese GSHP investigation and analysis, the first annual meeting of China ground source heat pump
Acknowledgments
The authors gratefully acknowledge the support from the General project of Liaoning Provincial Education Department (grant no. L2013100) and the 12th Five-year Science and Technology Support Project of the Xinjiang Uygur Autonomous Region (grant no. 201130107).
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Han, Z., Yang, J., Lin, M., Zhang, Y. (2017). Analysis of the Thermal Effect About Groundwater Flowing to the Nest of Tubes Heat Transfer. In: Zhang, X., Dincer, I. (eds) Energy Solutions to Combat Global Warming. Lecture Notes in Energy, vol 33. Springer, Cham. https://doi.org/10.1007/978-3-319-26950-4_26
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DOI: https://doi.org/10.1007/978-3-319-26950-4_26
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