A Physical Model Test System of Water-Heat Coupled Sand Tank in Porous Media Aquifer

Abstract

The invention relates to a physical model experiment system for a water-heat coupling sand slot of a porous medium aquifer. The system comprises a main sand slot body structure, a water level adjusting and circulating device, an automatic temperature collecting device and a constant-temperature constant-flow water injection device. Due to the structures of a glass rotameter, a sing chip computer, temperature sensors arranged at the nodes of a wire basket, a self-priming pump, an overflow bucket and the like, the physical model experiment system for the water-heat coupling sand slot of the porous medium aquifer disclosed by the invention is capable of measuring the experimental basic physical parameters, automatically collecting the experimental data precisely, automatically operating the experimental system, adjusting the experimental working condition, satisfying the physical simulation in the water-heat coupling chamber under a plurality of requirements, and is simple in design and convenient in operation.

Description

technical field [0001] The invention relates to a test model system for coupling heat transfer and energy storage of underground water flow and heat in a porous medium, in particular to a physical model test system for a water-heat coupling sand tank of a porous medium aquifer. Background technique [0002] The aquifer simulated in the sand tank is a kind of porous medium. Groundwater exists in the pores of the aquifer as a fluid and flows in it. The heat transfer in the water-bearing medium is a complex three-field coupling problem of water-heat-pressure. The flow, heat, and magnitude of the overlying load on the aquifer need to be considered simultaneously. Under the same pressure conditions, when the groundwater flows, the heat transfer in the groundwater is mainly realized by convection (forced convection) and thermodynamic dispersion, which includes two parts: heat conduction and thermomechanical dispersion. Factors such as groundwater flow or stillness, flow velocity,...

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Problems solved by technology

In addition, the heat transfer form inside the aqueous medium also includes natural convection, heat conduction between water and the aqueous medium skeleton, etc. Although these effects are relatively weak and have little impact on heat transfer, natural convection under different heat source conditions The influence on the calculation results of the temperature field is often not negligible.

In the research of heat migration and energy storage in porous media, most of the research data comes from actual engineering. However, due to the complex geological conditions in the field, the difficulty of test operation, and the existence of difficult data monitoring, it is difficult to obtain the data required for a large number of theoretical studies. Poor data continuity has led to theoretical research lagging behind engineering applications. Compared with foreign research, my country's use of indoor physical models to study the mechanism of hydrothermal coupling is even more insufficient

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