High thermal conductive cementing material capable of enhancing heat exchange performance of heat exchange system of floor heating

Abstract

The invention discloses a high thermal conductive cementing material capable of enhancing the heat exchange performance of the heat exchange system of floor heating. The cementing material is composed of the following components by weight: 100 grams of cement, 50 to 200 grams of steel slag or copper mine slag, 150 to 300 grams of quartz sand, 0.8 to 3.0 grams of antifoaming agent, and 1.2 to 3.6 grams of water reducer. On the construction site, water accounting for 40 to 50% of the total weight of cement and steel slag / copper mine slag is added, and then the mixture is evenly stirred and poured into drill holes. The provided cementing material has the advantages of high thermal conductivity and good workability, can expand slightly, and thus can fully fill the drill holes. So that the heat exchange pipes can be tightly combined with the rock stratum, and the heat exchange performance is enhanced. The high thermal conductive cementing material can effectively protect heat exchange pipes from underground water corrosion, thus the service life of heat exchange pipes is prolonged, and the system operation risk is reduced. Furthermore, the cementing material has the advantages of low price, long service life, easily-available raw materials, and no pollution to environment.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a high thermal conductivity gelling material applied to a deep geothermal exploitation heat exchange system to enhance the heat exchange capacity of the geothermal heat exchange system. Background technique [0002] Because deep geothermal resources have many advantages such as large heat reserves, good thermal stability, environmental protection, energy saving, and regeneration, their development and utilization have gradually attracted everyone's attention. China's current geothermal utilization is dominated by direct utilization, supplemented by indirect utilization. Direct utilization is to exploit underground hot water to utilize geothermal energy, while indirect utilization is to take out and utilize geothermal energy through heat exchange devices. In the long run, direct utilization is an unsustainable way of geothermal exploitation and utilization; ...

AI Technical Summary

Problems solved by technology

The use of filling materials with poor thermal conductivity and shrinkage and cracking will increase the thermal resistance in the borehole, reduce the heat transfer rate and heat transfer efficiency; if it is not backfilled, the pipe will be filled with still water, and the thermal conductivity of still water is very small. Only 0.60W / m.K, and the presence of water will corrode the pipe and shorten the life of the pipe

The existence of these unfavorable factors will increase the investment of the system, increase the risk of system operation, and shorten the life of the heat exchange system