Test device for simulating permafrost region well heat insulation or heating

Abstract

The invention relates to a test device for simulating permafrost region well heat insulation or heating. The test device is characterized in that a test tank is a circular interlayer barrel body consisting of an outer ring, an inner ring, a top plate and a bottom plate, a soil body is filled in an interlayer, a refrigerating liquid circulation passage is arranged inside the top plate and the bottom plate, is connected with a refrigerating temperature control device and is in contact with the soil body, water is filled in a water tank, the water tank is arranged in the test tank, a heat insulation barrel is placed between the water tank and the test tank, heat insulation covers are placed on and under the water tank, a water replenishing device is connected with a water tank bottom plate through a water replenishing pipe, a water pressure gauge is arranged on the water replenishing pipe, a water pumping device is connected with a water tank top cover through a water pumping pipe, the water pumping pipe is inserted into water of the water tank, a flow meter is arranged on the water pumping pipe, a heating temperature control device is connected with a heating pipe through a conducing wire, the heating pipe is inserted into the water of the water tank, and temperature sensors are arranged in the solid body and the water of the water tank and are respectively connected with a digital collecting instrument. The test device has the advantages that the permafrost region well is simulated, the reasonable well diameter, the water pumping speed, the heat insulation thickness and the power of a heating device are obtained, and the goals of energy saving and environment protection are reached.

Description

technical field [0001] The invention relates to a test device capable of simulating heat preservation or heating of water wells in permafrost regions. [0002] Background technique [0003] Water must be provided when carrying out engineering construction or living in permafrost areas, but these areas are in a frozen state all year round, especially in winter, where there is ice and snow everywhere, it is difficult to find unfrozen water sources. Fortunately, there may be unfrozen water below the permafrost layer of a certain thickness (several meters to hundreds of meters), called frozen water, which can provide water sources by drilling wells and pumping water. However, there are still some issues that need to be resolved. The water in the frozen layer is not frozen. When the water passes through the permafrost layer during the pumping process, it will exchange heat with the permafrost layer, and the temperature will drop. As a result, freezing may occur, making the wate...

AI Technical Summary

Problems solved by technology

[0003] Water must be provided when carrying out engineering construction or living in permafrost areas, but these areas are in a frozen state all year round, especially in winter, where there is ice and snow everywhere, it is difficult to find unfrozen water sources

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