A dimensionless parameter approach to the thermal behavior of an aquifer thermal energy storage system

Journal Article · Tue Jun 01 04:00:00 EDT 1982 · Water Resour. Res.; (United States)

DOI:https://doi.org/10.1029/WR018i003p00571· OSTI ID:6869713

Doughty, C ^[1]; Hellstrom, G; Tsang, C F; Claesson, J

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1. Lawrence Berkeley Lab., CA

To predict the performance of an aquifer thermal energy system, an understanding of the system's hydrothermal behavior is needed. One possibility is to run a detailed numerical simulation of the system. However, for a single-well system in which fluid flow is limited to steady radial flow, a characterization scheme based on a set of four dimensionless parameter groups allows production temperatures and energy recovery factors to be read from graphs. The assumption of radial fluid flow is valid when buoyancy flow can be neglected and a well is fully screened in a horizontal aquifer which is confined above and below by impermeable layers. Criteria for little buoyancy flow include a low permeability or vertically stratified aquifer, a small temperature difference between injected and ambient water, and short cycle length. The basic energy transport equations for the aquifer-confining layer system with steady radial fluid flow in the aquifer are nondimensionalized to derive the key parameter groups. Next a numerical model which calculates the heat transfer in the aquifer and confining layers for an injection-storage-production cycle is run for a range of values of these groups.The calculated production temperatures and energy recovery factors are then presented graphically as a function of the parameter groups. Comparisons between results of field experiments and recovery factors read from the graphs show good agreement.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6869713
• Journal Information: Water Resour. Res.; (United States), Journal Name: Water Resour. Res.; (United States) Vol. 18:3; ISSN WRERA
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250600* -- Energy Storage-- Thermal
AQUIFERS
ENERGY RECOVERY
ENERGY STORAGE
ENERGY TRANSFER
FLUID FLOW
FLUID INJECTION
HEAT RECOVERY
HEAT STORAGE
HEAT TRANSFER
INJECTION WELLS
MATHEMATICAL MODELS
PERMEABILITY
RECOVERY
STORAGE
STRATIFICATION
WATER WELLS
WELLS