Aquifer thermal energy storage reference manual: seasonal thermal energy storage program Page: 76 of 99
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3.7 NUMERICAL SIMULATION
C. T. Kincaid, Task Leader
Pacific Northwest Laboratory
P.O. Box 999
Richland, WA 99352
(509) 375-2867 FTS 444-2867
Activities of the Numerical Simulation Task include:
. developing a technology capable of predicting the transport and retrieval
of a thermal energy resource within the ground-water environment
* conducting analytical analyses (exact or asymptotic) to demonstrate the
sound mathematical/numerical character of the technology
. demonstrating the model's simulative ability through the simulation of
experiments conducted by Auburn University.
Internal Activities - FY-1980
A previously developed model of ground-water flow for multidimensional
systems has been employed as the core of the much broader model required for
the technical support of STES. Energy- and solute-transport mechanisms have
been added to the fluid (mass) transport model. The three partial differential
equations are then solved in a cyclical, uncoupled solution scheme that employs
the most current estimates of the dependent variable values in the evaluation
of nonlinear contributions and forcing functions. Both density and viscosity
are functions of the local pressure, temperature, and/or solute concentration.
For efficient simulation of field problems with complex geometry, the model
has been structured to execute in stages. The staged structure gives a user
the opportunity to thoroughly check the geometric structure of the domain, the
physical parameters of the problem, and aspects of the solution sequence prior
to making the commitment of a complete run. An acronym has been adopted for
this model. The acronym is CFEST, and it stands for coupled fluid, energy,
and solute transport.
Exact or asymptotic analyses that will lend credence to the algorithm
selected and developed have been identified from the literature. Specifically,
DATE ISSUED: SUPERSEDES PNL-3471 SECTION 3.7
August 1980 ISSUE DATED: New PAGE 1
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Prater, L.S. Aquifer thermal energy storage reference manual: seasonal thermal energy storage program, report, January 1, 1980; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc1053829/m1/76/: accessed May 21, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.