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Grouting backfill material special for ground source heat pump

A technology of ground source heat pump and powder materials, which is applied in the field of special grouting backfill materials for ground source heat pumps, which can solve the problems of insufficient backfill materials and achieve low cost

Inactive Publication Date: 2012-02-15
BEIJING SHENGZHAO TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic research on backfill materials is not perfect enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The mass percentage of powder and aggregate is 1:2; the metal and its compound components in the powder account for 10% of the total mass of the powder, heat-resistant cement (JC236-81) accounts for 30% of the total mass of the powder, Bentonite (R183) accounts for 15% of the total mass of the powder, and the rest is clay; the aggregate contains metal and its compound components accounting for 30% of the total mass of the aggregate, and the rest is a mixture of quartz sand and aluminum oxide (The ratio of the two is arbitrary).

[0021] The superplasticizer (HYTC-1 high-efficiency superplasticizer) accounts for 0.3% of the mass of all dry materials.

[0022] The particle size of the components in the powder should not be greater than 100 mesh; the particle size of the components in the aggregate should not be greater than 10 mm.

[0023] Among them: the powder contains metal and its compound components are metal ore powder and aluminum oxide, and the aggregate contains...

Embodiment 2

[0025] The mass percentage of powder and aggregate is 1:2; the metal and its compound components in the powder account for 20% of the total mass of the powder, heat-resistant cement (JC236-81) accounts for 35% of the total mass of the powder, Bentonite (186 organic bentonite) accounts for 10% of the total mass of the powder, and the rest is clay; components containing metals and their compounds in the aggregate account for 15% of the total mass of the aggregate, and the rest is quartz sand.

[0026] Water reducing agent (GB / 876-2003) accounts for 0.3% of all dry materials.

[0027] The particle size of the components in the powder should not be greater than 100 mesh; the particle size of the components in the aggregate should not be greater than 10 mm.

[0028] Among them: the powder contains metal and its compound components are ore sand, metal-containing dust, and aluminum oxide; the aggregate contains metal and its compound components are waste cast iron chips, iron oxide s...

Embodiment 3

[0030] The mass percentage of powder and aggregate is 1:2; the metal and its compound components in the powder account for 15% of the total mass of the powder, heat-resistant cement (JC236-81) accounts for 33% of the total mass of the powder, Bentonite (186 organic bentonite) accounts for 12% of the total mass of the powder, and the rest is clay; components containing metals and their compounds in the aggregate account for 25% of the total mass of the aggregate, and the rest is aluminum oxide.

[0031] Water reducing agent (GB / 876-2003) accounts for 0.3% of all dry materials.

[0032] The particle size of the components in the powder should not be greater than 100 mesh; the particle size of the components in the aggregate should not be greater than 10 mm.

[0033] Among them: the powder contains metal and its compound components are iron oxide scale and metal ore powder, and the aggregate contains metal and its compound components are ore sand, Al 2 o 3 , Waste cast iron chi...

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PUM

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Abstract

The invention relates to the technical field of ground source heat pump system and specifically provides a grouting backfill material special for a ground source heat pump. Choice of the grouting backfill material has important meaning for guaranteeing performances of a ground heat exchanger. The research on development of a high thermal conductivity novel backfill material has significant social and economic benefits for popularizing ground source heat pump technology and promoting low carbon economy. The invention provides a high thermal conductivity backfill material, comprising powder and aggregate in a mass percent of 1:2, wherein the powder contains metal and compound thereof accounting for 10-20wt% of the powder, heatproof cement accounting for 30-35wt% of the powder, bentonite accounting for 10-15wt% of the powder and the balance of clay, and the aggregate contains metal and compound thereof accounting for 15-30wt% of the aggregate and a mixture of one or two selected from quartz sand and alumina; and a water reducer accounts for 0.3wt% of the drier.

Description

technical field [0001] The invention relates to the technical field of ground source heat pump systems, in particular to a special grouting backfill material for ground source heat pumps. Background technique [0002] The ground source heat pump system is a heat pump technology that has gradually emerged with the emergence of global energy crisis and environmental problems. [0003] Soil-coupled heat pump system, also known as ground-source heat pump system with buried tube heat exchanger. The system consists of a horizontal buried tube heat exchanger or a vertical buried tube heat exchanger to form a shallow ground energy collection system. [0004] Grouting and backfilling is an important link in the construction process of the buried tube heat exchanger, that is, after the drilling is completed and the U-shaped tube is lowered, the backfilling material needs to be injected into the borehole. The backfill material for buried tube heat exchangers should be a heat transfer...

Claims

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Application Information

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IPC IPC(8): C04B28/00
Inventor 赵晓波
Owner BEIJING SHENGZHAO TECH DEV
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