diff --git a/IBPSA/Fluid/Geothermal/Aquifer/MultiWell.mo b/IBPSA/Fluid/Geothermal/Aquifer/MultiWell.mo index 89132de230..2db8157c8e 100644 --- a/IBPSA/Fluid/Geothermal/Aquifer/MultiWell.mo +++ b/IBPSA/Fluid/Geothermal/Aquifer/MultiWell.mo @@ -414,6 +414,15 @@ is the temperature at location r and time t, The first term on the right hand side of the equation describes the effect of conduction, while the second term describes the fluid flow.

+

+The pressure losses in the aquifer are calculated using the Darcy's law +

+Δp = ṁ g ⁄ (2 π K h ln(rMax ⁄ rWB)) +

+where ṁ is the water mass flow rate, g is the gravitational acceleration, K is the hydraulic conductivity, h is the thickness of the aquifer, +rMax is the domain radius and rWB is the well radius. The pressure losses in the wells are calculated using +Modelica.Fluid.Pipes.BaseClasses.WallFriction.Detailed.pressureLoss_m_flow. +

Spatial discretization

To discretize the conductive-convective equation, the domain is divided into a series @@ -431,11 +440,11 @@ The geometric representation of the model is illustrated in the figure below.

Typical use and important parameters

-By default, the component consists of a cold well and a warm well. The number of wells can be increased by modifing the parameters nCoo and nHot. +By default, the component consists of a single pair of wells: one cold well and one warm well. The number of paired wells can be increased by modifing the parameters nPai. The effect is a proportional increase of thermal capacity.

-To ensure conservation of energy, the two wells are connected via fluid ports. To avoid thermal interferences, make sure that the aquifer domain radius rMax is large enough for your specific use case. +To ensure conservation of energy, the wells are connected via fluid ports. To avoid thermal interferences, make sure that the aquifer domain radius rMax is large enough for your specific use case.

Circulation pumps are included in the model and they can be controlled by acting on the input connector. The input must vary between [1,-1]. A positive value will circulate water @@ -445,12 +454,6 @@ clockwise (extraction from the cold well and injection into the warm well). A ne The temperature values in the warm and cold aquifers can be accessed using TAquHot and TAquCol. These temperatures correspond to the temperatures of each thermal capacitance in the discretized domain. The location of the thermal capacitance is expressed by rVol.

-

-The nominal pressure drops in the circuit must be selected according to the figure below. -

-

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