CN102351475A - Grouting backfill material special for ground source heat pump - Google Patents
Grouting backfill material special for ground source heat pump Download PDFInfo
- Publication number
- CN102351475A CN102351475A CN2011101924465A CN201110192446A CN102351475A CN 102351475 A CN102351475 A CN 102351475A CN 2011101924465 A CN2011101924465 A CN 2011101924465A CN 201110192446 A CN201110192446 A CN 201110192446A CN 102351475 A CN102351475 A CN 102351475A
- Authority
- CN
- China
- Prior art keywords
- powder
- aggregate
- heat pump
- source heat
- accounts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
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
The present invention relates to the earth-source hot-pump system technical field, the special-purpose grouting of specifically a kind of earth source heat pump backfilling material.
Background technology
Earth-source hot-pump system is a heat pump techniques that rises gradually along with the appearance of global energy dilemma and environmental problem.
The ground-coupled heat pump system is also referred to as the underground heat exchanger earth-source hot-pump system.This system constitutes shallow-layer ground by horizontal buried tube heat exchanger or rectilinear buried tube heat exchanger can acquisition system.
The grouting backfill is the important step in the ground heat exchanger construction process, promptly finishes in boring, after the U-shaped pipe has descended, needs in boring, to inject backfilling material.Ground heat exchanger should be a kind of heat-conduction medium with backfilling material, requires it to have good heat conductivity, workability, impermeability, swelling property and certain intensity etc.
The selection of backfilling material and correct backfill construction have important meaning for the performance that guarantees ground heat exchanger.The backfilling material that heat conductivility is high reduces the boring total length in same condition and increases the reduction of system's initial cost and working cost.In the last few years, the countries in the world scientific and technical personnel more and more paid close attention to the performance of improving and optimizing backfilling material.Late nineteen nineties, the U.S. developed a kind of cement based backfilling material CG111 (mixtures of cement, quartz sand, wilkinite, water, water reducer etc.), and its thermal conductivity can reach 2.16W/mK, and Heat stability is good occupies international most advanced level.Domestic research to backfilling material at present is perfect not enough." earth-source hot-pump system engineering legislation " (GB 50366-2005) do not provide the backfilling material prescription of recommendation.Related domestic documents also seldom.Therefore, the novel backfilling material of research and development high heat conductance has the important social economic benefit to popularization ground source heat pump technology, development low-carbon economy.
Summary of the invention
The purpose of this invention is to provide the special-purpose grouting of a kind of earth source heat pump backfilling material, to solve the defective that above-mentioned prior art exists.
Technical scheme of the present invention is that the prescription of grouting backfilling material is:
Form by powder and aggregate; The mass percent of powder and aggregate is 1: 2; It is characterized in that containing metal in the powder and the compound component accounts for 10%～20% of powder total mass, cement accounts for the 30%-35% of powder total mass, and wilkinite accounts for the 10%-15% of powder total mass, and all the other are clay; Have in the aggregate and contain metal and the compound component accounts for 15%～30% of aggregate total mass, all the other are the mixture of wherein a kind of of quartz sand, aluminium sesquioxide or two kinds; Water reducer accounts for 0.3% of all siccative quality.
Vertical underground heat exchanger of the present invention is a kind of heat-conduction medium with the grouting backfilling material.At first require it to have good heat conductivity, secondly it must have good workability, impermeability, swelling property and certain intensity etc.Also must consider its economy, local resources situation, factor such as acquisition whether easily in addition.
Grouting backfilling material thermal conductivity commonly used at present, see table one:
Table one
| Injection material | Thermal conductivity W/ (mK) |
| Quartz sand | 2.43 |
| Do husky | 0.3～0.6 |
| Wet husky | 0.64 |
| Clay | 0.75 |
| Earth | 0.9～1.4 |
| Peat | 0.84 |
| Wilkinite (1.3g/cm 3) | 0.7 |
| The wilkinite that band is husky | 1.4～1.8 |
| Lime | 1.67 |
| Clay | 0.87 |
| Moisture | 0.5 |
| Air in the soil | 0.021 |
At present useless in the common metal and the compound thermal conductivity thereof of grouting backfilling material, see table two:
Table two
| Material | Thermal conductivity W/ (mK) |
| Aluminium | 237 |
| Steel | 54 |
| Cast iron | 43 |
| Various metallic ore materials | 2～7 |
| Aluminium sesquioxide | 6～6.5 |
| Iron scale | 1.45 |
Comparison sheet one can find out that with table two thermal conductivity far of metal and compound thereof is far above the conventional backfilling material.
Mentality of designing of the present invention is: cheapness, the metal that is easy to obtain and compound waste material thereof are added in traditional backfill by suitable proportion of composing.These materials mainly are: machining metal steel scrap bits and waste iron bits, iron scale, aluminium sesquioxide aggregate and powder, various metal mining powder and ore in sand form, containing metal dust the like waste.
Advantage of the present invention is that the thermal conductivity of the grouting backfilling material of containing metal and compound thereof is 2.8～5.6W/mK.Be steel scrap bits, waste iron bits, iron scale, metal mining powder and ore in sand form, containing metal dust the like waste owing to what utilize simultaneously,, also found a road that can utilize for this this waste so cost is low.
Embodiment
Embodiment 1
The mass percent of powder and aggregate is 1: 2; Wherein contain metal in the powder and the compound component accounts for 10% of powder total mass, thermal cement (JC236-81) accounts for 30% of powder total mass, and wilkinite (R183) accounts for 15% of powder total mass, and all the other are clay; Have in the aggregate and contain metal and the compound component accounts for 30% of aggregate total mass, all the other are the mixture (the two ratio is any) of two kinds of quartz sands, aluminium sesquioxide.
Water reducer (HYTC-1 high efficiency water reducing agent) accounts for 0.3% of all siccative quality.
The granularity of component should be greater than 100 orders in the powder; The granularity of component should be greater than 10 millimeters in the aggregate.
Wherein: contain metal in the powder and the compound component is metal mining powder, aluminium sesquioxide, it is steel scrap bits, aluminium sesquioxide that the metal of containing and compound component thereof are arranged in the aggregate.
Embodiment 2
The mass percent of powder and aggregate is 1: 2; Wherein contain metal in the powder and the compound component accounts for 20% of powder total mass, thermal cement (JC236-81) accounts for 35% of powder total mass, and wilkinite (186 organobentonite) accounts for 10% of powder total mass, and all the other are clay; Have in the aggregate and contain metal and the compound component accounts for 15% of aggregate total mass, all the other are quartz sand.
Water reducer (GB/876-2003) accounts for 0.3% of all siccative quality.
The granularity of component should be greater than 100 orders in the powder; The granularity of component should be greater than 10 millimeters in the aggregate.
Wherein: containing metal and compound component thereof in the powder is ore in sand form, containing metal dust, aluminium sesquioxide, and it is waste iron bits, iron scale, aluminium sesquioxide that the metal of containing and compound component thereof are arranged in the aggregate.
Embodiment 3
The mass percent of powder and aggregate is 1: 2; Wherein contain metal in the powder and the compound component accounts for 15% of powder total mass, thermal cement (JC236-81) accounts for 33% of powder total mass, and wilkinite (186 organobentonite) accounts for 12% of powder total mass, and all the other are clay; Have in the aggregate and contain metal and the compound component accounts for 25% of aggregate total mass, all the other are aluminium sesquioxide.
Water reducer (GB/876-2003) accounts for 0.3% of all siccative quality.
The granularity of component should be greater than 100 orders in the powder; The granularity of component should be greater than 10 millimeters in the aggregate.
Wherein: contain metal in the powder and the compound component is iron scale, metal mining powder, it is ore in sand form, Al that the metal of containing and compound component thereof are arranged in the aggregate
2O
3, waste iron bits.
Claims (3)
1. the special-purpose grouting of an earth source heat pump backfilling material is made up of powder and aggregate, and the mass percent of powder and aggregate is 1: 2; It is characterized in that containing metal in the powder and the compound component accounts for 10%～20% of powder total mass, thermal cement accounts for the 30%-35% of powder total mass, and wilkinite accounts for the 10%-15% of powder total mass, and all the other are clay; Have in the aggregate and contain metal and the compound component accounts for 15%～30% of aggregate total mass, all the other are the mixture of wherein a kind of of quartz sand, aluminium sesquioxide or two kinds; Water reducer accounts for 0.3% of all siccative quality.
2. the special-purpose grouting of a kind of earth source heat pump as claimed in claim 1 backfilling material is characterized in that the granularity of component in the described powder should be greater than 100 orders; The granularity of component should be greater than 10 millimeters in the described aggregate.
3. the special-purpose grouting of a kind of earth source heat pump as claimed in claim 1 backfilling material is characterized in that described metal and compound thereof mainly are machining metal steel scrap bits, waste iron bits, iron scale, metal mining powder and ore in sand form, containing metal dust, aluminium sesquioxide the like waste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101924465A CN102351475B (en) | 2011-07-11 | 2011-07-11 | Grouting backfill material special for ground source heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101924465A CN102351475B (en) | 2011-07-11 | 2011-07-11 | Grouting backfill material special for ground source heat pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102351475A true CN102351475A (en) | 2012-02-15 |
| CN102351475B CN102351475B (en) | 2012-11-21 |
Family
ID=45575155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101924465A Expired - Fee Related CN102351475B (en) | 2011-07-11 | 2011-07-11 | Grouting backfill material special for ground source heat pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102351475B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104963341A (en) * | 2015-06-17 | 2015-10-07 | 青岛海川建设集团有限公司 | Coupling type ground source heat pump mixed backfill technology and backfill material |
| CN105174860A (en) * | 2015-08-21 | 2015-12-23 | 徐德龙 | High thermal conductive cementing material capable of enhancing heat exchange performance of heat exchange system of floor heating |
| CN106170529A (en) * | 2014-03-21 | 2016-11-30 | C·J·坦普尔顿 | The improvement of buried cable transmission |
| CN106866081A (en) * | 2017-04-07 | 2017-06-20 | 山东建筑大学 | A kind of preparation method of earth source heat pump drilling backfilling material |
| CN106986593A (en) * | 2017-04-07 | 2017-07-28 | 山东建筑大学 | A kind of preparation method of earth source heat pump drilling backfilling material |
| CN107721344A (en) * | 2017-11-26 | 2018-02-23 | 邵雪 | A kind of grouting material and water-stopping method of soil source heat pump system heat exchanger tube wellhole |
| CN111302831A (en) * | 2019-05-29 | 2020-06-19 | 纳米及先进材料研发院有限公司 | Low-strength backfill material with good thermal conductivity |
| CN111535295A (en) * | 2020-05-09 | 2020-08-14 | 中国建筑第八工程局有限公司 | Outdoor buried pipe structure of ground source heat pump and construction method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6251179B1 (en) * | 1999-03-23 | 2001-06-26 | The United States Of America As Represented By The Department Of Energy | Thermally conductive cementitious grout for geothermal heat pump systems |
| CN1793767A (en) * | 2005-12-30 | 2006-06-28 | 中国科学院广州能源研究所 | Intensified heat transfer method of soil source heat pump underground heat exchanger |
| CN1887778A (en) * | 2006-04-17 | 2007-01-03 | 山东建筑大学 | Backfill to buried pipe heat exchanger through hole |
| US20100071596A1 (en) * | 2008-09-22 | 2010-03-25 | Konczak Jeffrey J | Geothermal grout, and methods of preparing and utilizing same |
| US7938904B1 (en) * | 2005-02-28 | 2011-05-10 | B. Ryland Wiggs | Cementitious grout and methods of using same |
-
2011
- 2011-07-11 CN CN2011101924465A patent/CN102351475B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6251179B1 (en) * | 1999-03-23 | 2001-06-26 | The United States Of America As Represented By The Department Of Energy | Thermally conductive cementitious grout for geothermal heat pump systems |
| US7938904B1 (en) * | 2005-02-28 | 2011-05-10 | B. Ryland Wiggs | Cementitious grout and methods of using same |
| CN1793767A (en) * | 2005-12-30 | 2006-06-28 | 中国科学院广州能源研究所 | Intensified heat transfer method of soil source heat pump underground heat exchanger |
| CN1887778A (en) * | 2006-04-17 | 2007-01-03 | 山东建筑大学 | Backfill to buried pipe heat exchanger through hole |
| US20100071596A1 (en) * | 2008-09-22 | 2010-03-25 | Konczak Jeffrey J | Geothermal grout, and methods of preparing and utilizing same |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106170529A (en) * | 2014-03-21 | 2016-11-30 | C·J·坦普尔顿 | The improvement of buried cable transmission |
| CN104963341A (en) * | 2015-06-17 | 2015-10-07 | 青岛海川建设集团有限公司 | Coupling type ground source heat pump mixed backfill technology and backfill material |
| CN105174860A (en) * | 2015-08-21 | 2015-12-23 | 徐德龙 | High thermal conductive cementing material capable of enhancing heat exchange performance of heat exchange system of floor heating |
| CN106866081A (en) * | 2017-04-07 | 2017-06-20 | 山东建筑大学 | A kind of preparation method of earth source heat pump drilling backfilling material |
| CN106986593A (en) * | 2017-04-07 | 2017-07-28 | 山东建筑大学 | A kind of preparation method of earth source heat pump drilling backfilling material |
| CN107721344A (en) * | 2017-11-26 | 2018-02-23 | 邵雪 | A kind of grouting material and water-stopping method of soil source heat pump system heat exchanger tube wellhole |
| CN111302831A (en) * | 2019-05-29 | 2020-06-19 | 纳米及先进材料研发院有限公司 | Low-strength backfill material with good thermal conductivity |
| CN111535295A (en) * | 2020-05-09 | 2020-08-14 | 中国建筑第八工程局有限公司 | Outdoor buried pipe structure of ground source heat pump and construction method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102351475B (en) | 2012-11-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102351475B (en) | Grouting backfill material special for ground source heat pump | |
| Mahmoud et al. | A review of grout materials in geothermal energy applications | |
| Liu et al. | An eco-friendliness inductive asphalt mixture comprising waste steel shavings and waste ferrites | |
| Venkatarama Reddy | Sustainable materials for low carbon buildings | |
| CN106242623A (en) | With sintering brick permeable to water that potash feldspar tailings is prepared for major ingredient and preparation method thereof | |
| CN106986593B (en) | A kind of preparation method of earth source heat pump drilling backfilling material | |
| CN103086668A (en) | Design method for mixing ratio of C60-grade pumping self-compacting steel tube recycled concrete | |
| CN104402349A (en) | Ground-source heat pump ground-buried pipe backfill material and preparation method thereof | |
| Zhao et al. | Recycling waste material for backfill coupled heat exchanger systems in underground stopes of mines | |
| CN106854060A (en) | A kind of ecological permeable bricks and preparation method thereof | |
| CN104692720A (en) | Copper tailing baking-free brick and preparation method thereof | |
| Do et al. | Utilization of marine dredged soil in controlled low-strength material used as a thermal grout in geothermal systems | |
| CN104556917A (en) | High-early-strength filling material for coal mine goaf | |
| CN106866081A (en) | A kind of preparation method of earth source heat pump drilling backfilling material | |
| CN103172285A (en) | Milltailing multivariate composite mine filling cementing agent | |
| CN104876534A (en) | Method for preparing autoclaved brick from tungsten tailings and waste tungsten ore | |
| Ning et al. | Study on the thermal-mechanical properties and heat transfer characteristics of heat storage functional backfill body | |
| CN106082741B (en) | A kind of method that mine tailing prepares active mixed material | |
| KR102400336B1 (en) | Grouting material for underground heat exchangers and method of construction using the same | |
| Park et al. | Engineering Characteristics of CLSM Using Bottom Ash and Eco-friendly Soil Binder | |
| KR100860259B1 (en) | Grout composition for laying geothermal exchanger | |
| CN104003613A (en) | Method for manufacturing inorganic fiber by means of municipal sludge and smelt slag | |
| Bose et al. | Quantifying Sustainability and Energy Benefit by Recycling of Ground Granulated Blast-Furnace Slag (GGBS) on Replacement of Natural Fertile Topsoil Using for Fired Clay Brick Making Process–An Experimental Study | |
| CN105271986A (en) | Cement grouting material adopting quartz sand and iron tailings as aggregates | |
| Li et al. | Numerical simulation of roof movement and fill strength of coal deep mining |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| DD01 | Delivery of document by public notice |
Addressee: Beijing Shengzhao Technology Development Co., Ltd. Zhao Xiaowen Document name: Notification of Passing Preliminary Examination of the Application for Invention |
|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| DD01 | Delivery of document by public notice |
Addressee: Beijing Shengzhao Technology Development Co., Ltd. Zhao Xiaowen Document name: Notification of Publication and of Entering the Substantive Examination Stage of the Application for Invention |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhao Xiaowen Document name: Notice of termination of patent |
|
| DD01 | Delivery of document by public notice | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20200711 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |