Investigation on groundwater velocity based on the finite line heat source seepage model

Zhang, Wenke; Yang, Hongxing; Guo, Xiaoqiang; Yu, Mingzhi; Fang, Zhaohong

doi:10.1016/j.ijheatmasstransfer.2016.03.057

Cited by 12 publications

(3 citation statements)

References 15 publications

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“…For example, it can be observed in Figure 4a that for high values of Pe , optimal designs have a lower total cost. For example, at 12)- (16). As a result, optimal fraction of the load assumed by the GCHP system increases with Pe in Figure 4d.…”

Section: Figure 4 Effect Of Péclet Number and Ground Thermal Conductivity On: (A) Minimal Total Cost (B) Optimal Boreholes Depth (C) Optimentioning

confidence: 90%

“…Groundwater flow can significantly affect heat transfer around boreholes [7]- [11]. Many analytical models have been developed to quantify its effects [12]- [16]. Previous studies have also developed relatively fast heat transfer computational methodologies with groundwater flow, such as calculating a thermal ground resistance [17] or a thermal conductivity [18], using fast Fourier transform combined with cubic spline [19], or correlations for G-functions based on analytical models for groundwater flow [20].…”

Section: Introductionmentioning

confidence: 99%

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Influence of groundwater flow on cost minimization of ground coupled heat pump systems

2018

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This paper introduces a new sizing methodology for ground coupled heat pump (GCHP) systems which takes into account groundwater flow (by using G-functions based on analytical models) in order to achieve an economic optimization of the total cost of the project. The procedure includes the calculation of the initial and the annual operational costs. Optimal design variables (boreholes depth, distance between consecutive boreholes, etc.) and borefield layouts (number of boreholes in the x -direction) are presented for different values of the thermal conductivity of the ground. In addition, a parametric study is done to measure the impact of the groundwater flow velocity and angle with respect to the borefield on the economics of the project. It is shown that the effects of the groundwater flow velocity on total cost become apparent only for high velocities, i.e.,

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Section: Figure 4 Effect Of Péclet Number and Ground Thermal Conductivity On: (A) Minimal Total Cost (B) Optimal Boreholes Depth (C) Optimentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Influence of groundwater flow on cost minimization of ground coupled heat pump systems

2018

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“…Accounting for the effects of groundwater flow has also resulted in several improvements to the analyses of geothermal thermal-response tests and the data deduced from them, as demonstrated, for example, by the works of Gehlin and Hellström (2003), Lee and Lam (2012), Therrien et al (2010), Raymond et al (2011), Wagner et al (2013), , , and Zhang et al (2016). It should also be noted that the heterogeneity of the soil hydraulic conductivity and the mixing of flowing groundwater at the pore scale, could create disparities between the longitudinal (parallel to the direction of groundwater flow) and the transverse (perpendicular to the direction of groundwater flow) dispersion of heat, as discussed, for example, in the works of Hsu and Cheng (1990), Metzger et al (2004), Hidalgo et al (2009), Hecht-Méndez et al (2010), Diersch et al (2011a;, Molina-Giraldo et al (2011a), Chiasson and O'Connell (2011), and Nield and Bejan (2013).…”

Section: Introductionmentioning

confidence: 99%

A hybrid numerical-semi-analytical method for computer simulations of groundwater flow and heat transfer in geothermal borehole fields

Cimmino

Baliga

2019

International Journal of Thermal Sciences

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The formulation of a hybrid numerical-semi-analytical method for cost-effective simulations of heat transfer in fields of vertical geothermal boreholes, in the presence of groundwater flow, is presented. An amalgamation of a co-located control-volume finite element method and a finite volume method is used to solve 1) a volume-averaged continuity and the Darcy-Brinkman-Frochheimer equations to obtain the distribution of the groundwater flow; and 2) an unsteady three-dimensional volume-averaged advection-conduction equation to calculate the related ground temperature distribution, assuming local thermodynamic equilibrium between the groundwater and the soil particles. The bulk temperature distribution of the working fluid (flowing inside the legs of a U-tube pipe inserted inside each borehole and kept in place by grout) and the related heat extraction (or addition) rate are obtained using a semi-analytical method to solve a quasi-steady quasi-one-dimensional model. The conditions of no-slip, impermeability, equality of temperature, and continuity of heat flux are used at the interface between each borehole and the groundwater-saturated soil in the borehole field. The proposed method is applied to test and demonstration problems to demonstrate its capabilities.

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Investigation of the influence of groundwater seepage on the heat transfer characteristics of a ground source heat pump system with a 9-well group

et al. 2019

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Investigation on groundwater velocity based on the finite line heat source seepage model

Cited by 12 publications

References 15 publications

Influence of groundwater flow on cost minimization of ground coupled heat pump systems

Influence of groundwater flow on cost minimization of ground coupled heat pump systems

A hybrid numerical-semi-analytical method for computer simulations of groundwater flow and heat transfer in geothermal borehole fields

Investigation of the influence of groundwater seepage on the heat transfer characteristics of a ground source heat pump system with a 9-well group

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