IT201800007278A1 - Method for heat dissipation and recovery - Google Patents
Method for heat dissipation and recovery Download PDFInfo
- Publication number
- IT201800007278A1 IT201800007278A1 IT201800007278A IT201800007278A IT201800007278A1 IT 201800007278 A1 IT201800007278 A1 IT 201800007278A1 IT 201800007278 A IT201800007278 A IT 201800007278A IT 201800007278 A IT201800007278 A IT 201800007278A IT 201800007278 A1 IT201800007278 A1 IT 201800007278A1
- Authority
- IT
- Italy
- Prior art keywords
- heat
- transfer fluid
- heat transfer
- environment
- heat exchange
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 26
- 238000011084 recovery Methods 0.000 title claims description 6
- 230000017525 heat dissipation Effects 0.000 title claims description 4
- 239000013529 heat transfer fluid Substances 0.000 claims description 25
- 239000008187 granular material Substances 0.000 claims description 21
- 239000012530 fluid Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- -1 polyethylene Polymers 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- 239000012153 distilled water Substances 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims 2
- 229910000831 Steel Inorganic materials 0.000 claims 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 2
- 229910052782 aluminium Inorganic materials 0.000 claims 2
- 229910052802 copper Inorganic materials 0.000 claims 2
- 239000010949 copper Substances 0.000 claims 2
- 239000003507 refrigerant Substances 0.000 claims 2
- 239000010959 steel Substances 0.000 claims 2
- 229910002092 carbon dioxide Inorganic materials 0.000 claims 1
- 239000001569 carbon dioxide Substances 0.000 claims 1
- 239000000919 ceramic Substances 0.000 claims 1
- 229920003020 cross-linked polyethylene Polymers 0.000 claims 1
- 239000004703 cross-linked polyethylene Substances 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 239000011521 glass Substances 0.000 claims 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims 1
- 239000004800 polyvinyl chloride Substances 0.000 claims 1
- 239000011435 rock Substances 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 4
- 239000012809 cooling fluid Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 239000006262 metallic foam Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/0206—Heat exchangers immersed in a large body of liquid
- F28D1/022—Heat exchangers immersed in a large body of liquid for immersion in a natural body of water, e.g. marine radiators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
- F24T10/13—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
- F24T10/13—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes
- F24T10/17—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes using tubes closed at one end, i.e. return-type tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
- F28D7/12—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically the surrounding tube being closed at one end, e.g. return type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/003—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by using permeable mass, perforated or porous materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0045—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for granular materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F2013/001—Particular heat conductive materials, e.g. superconductive elements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Dispersion Chemistry (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
Description
TITOLO: “Metodo per la dissipazione e il recupero di calore” TITLE: "Method for heat dissipation and recovery"
DESCRIZIONE DESCRIPTION
Campo tecnologico Technological field
La presente invenzione è relativa ad un metodo innovativo per il trasferimento di calore che utilizza un fluido termovettore circolante in un dispositivo per lo scambio termico installato in un ambiente sfruttato come fonte primaria o secondaria di calore o di freddo, dove per ambiente si intende il sottosuolo, le falde acquifere, i laghi, i fiumi, il mare. The present invention relates to an innovative method for heat transfer that uses a heat transfer fluid circulating in a heat exchange device installed in an environment used as a primary or secondary source of heat or cold, where the subsoil is meant by environment. , the aquifers, the lakes, the rivers, the sea.
Stato dell’arte State of the art
Nel campo dello sfruttamento delle energie rinnovabili la geotermia rappresenta una valida opportunità applicabile in numerosi contesti ambientali. Si parla di energia idrotermica allorquando lo scambio di calore sfrutta i serbatoi naturali: corpi idrici sotterranei come le falde acquifere o i corpi idrici superficiali come laghi, fiumi e il mare. In the field of the exploitation of renewable energies, geothermal energy represents a valid opportunity applicable in numerous environmental contexts. We speak of hydrothermal energy when the heat exchange exploits natural reservoirs: underground water bodies such as aquifers or surface water bodies such as lakes, rivers and the sea.
Allo stato dell’arte per lo sfruttamento dell’energia geotermica e idrotermica si utilizzano dispositivi di scambio termico a circuito chiuso. La più comune tipologia di installazione prevede l’inserimento di dispositivi di scambio termico collegati in parallelo costituiti da tubi in polietilene collegati con un raccordo a “U” alla loro estremità inferiore installati in posizione verticale, orizzontale o obliqua per lo sfruttamento dell’energia geotermica del sottosuolo nonché idrotermica delle falde acquifere e dei corpi idrici superficiali. Oltre alle classiche configurazioni geometriche ad “U” esistono dispositivi di scambio termico a geometria elicoidale, a geometria coassiale e forme più complesse che mirano ad incrementare l’efficienza dello scambio termico. All’interno del dispositivo di scambio termico viene fatto circolare un fluido operativo che rappresenta il mezzo con cui avviene lo scambio di calore. In the state of the art, closed circuit heat exchange devices are used for the exploitation of geothermal and hydrothermal energy. The most common type of installation involves the insertion of heat exchange devices connected in parallel consisting of polyethylene pipes connected with a "U" fitting at their lower end installed in a vertical, horizontal or oblique position for the exploitation of geothermal energy subsoil as well as hydrothermal groundwater and surface water bodies. In addition to the classic "U" geometric configurations, there are heat exchange devices with helical geometry, coaxial geometry and more complex shapes that aim to increase the efficiency of the heat exchange. An operating fluid is circulated inside the heat exchange device which represents the means by which the heat exchange takes place.
Nella letteratura tecnica e scientifica sono riportati diversi metodi per migliorare l’efficienza dello scambio termico tra il fluido termovettore e l’ambiente, sostanzialmente riconducibili all’incremento: 1) della superficie di scambio termico 2) della conducibilità termica delle Various methods are reported in the technical and scientific literature to improve the efficiency of the heat exchange between the heat transfer fluid and the environment, essentially attributable to the increase: 1) of the heat exchange surface 2) of the thermal conductivity of the
superfici di scambio termico 3) del coefficiente di scambio termico per convezione. heat exchange surfaces 3) of the heat exchange coefficient by convection.
Riguardo a quest’ultimo aspetto, secondo l’arte nota, per incrementare il coefficiente di With regard to the latter aspect, according to the known art, to increase the coefficient of
scambio termico per convezione si stabilisce il regime di flusso turbolento. Tale metodo convection heat exchange establishes the turbulent flow regime. Such a method
presenta lo svantaggio di avere velocità elevate e quindi portate elevate e pertanto si ottiene it has the disadvantage of having high speeds and therefore high flow rates and therefore it is obtained
un salto termico modesto del fluido termovettore. Al fine di incrementare il coefficiente di a modest temperature difference of the heat transfer fluid. In order to increase the coefficient of
scambio termico per convezione, secondo l’arte nota, si utilizzano superfici irruvidite, heat exchange by convection, according to the known art, roughened surfaces are used,
corrugate e alettate. Un altro metodo consiste nell’utilizzare strutture elicoidali o più corrugated and finned. Another method is to use helical structures or more
complesse come schiume metalliche a celle aperte all’interno della struttura di scambio dove complex as metal foams with open cells inside the exchange structure where
fluisce il fluido termovettore. the heat transfer fluid flows.
Evidenze sperimentali mostrano che è possibile incrementare il coefficiente di scambio Experimental evidence shows that it is possible to increase the exchange coefficient
termico per convenzione a bassi regimi di moto riempiendo la struttura di scambio termico by convection at low engine speeds, filling the heat exchange structure
adibita al passaggio del fluido termovettore con un materiale granulare. used for the passage of the heat transfer fluid with a granular material.
Sommario dell’invenzione Summary of the invention
Il richiedente ha ora scoperto che è possibile aumentare significativamente l’efficienza dello The applicant has now discovered that it is possible to significantly increase the efficiency of the
scambio termico tra il fluido termovettore e l’ambiente con una spesa energetica contenuta. heat exchange between the heat transfer fluid and the environment with a low energy cost.
In accordo con la presente invenzione, tale scopo viene raggiunto mediante un metodo per In accordance with the present invention, this object is achieved by means of a method for
il recupero e la dissipazione di calore in accordo con la rivendicazione 1. heat recovery and dissipation in accordance with claim 1.
Il metodo, in accordo con la presente invenzione, consente di dissipare e recuperare calore The method, according to the present invention, allows to dissipate and recover heat
dall’ambiente con il duplice vantaggio di ottenere: un elevato salto termico del fluido from the environment with the double advantage of obtaining: a high temperature difference of the fluid
termovettore e un miglioramento della resa termica. Un altro oggetto della presente heat carrier and an improvement in heat output. Another subject of this
invenzione è un dispositivo per la dissipazione e il recupero di calore dal sottosuolo in cui il invention is a device for dissipating and recovering heat from the subsoil in which the
metodo in accordo con la presente invenzione può essere implementato. method according to the present invention can be implemented.
Descrizione delle figure Description of the figures
Figura 1: Schema rappresentativo del metodo in accordo con la presente invenzione. Figure 1: Representative diagram of the method according to the present invention.
Figura 2: Una forma di realizzazione preferita della presente invenzione riportata a scopo illustrativo da non considerarsi limitativa per la presente invenzione. Figure 2: A preferred embodiment of the present invention reported for illustrative purposes not to be considered as limiting to the present invention.
Descrizione dettagliata dell’invenzione Detailed description of the invention
Con riferimento alla Figura 1 annessa, il metodo oggetto della presente domanda di brevetto è rappresentato schematicamente in un diagramma, dove con ambiente (1) si intende una generica fonte primaria o secondaria di calore o di freddo. With reference to the attached Figure 1, the method object of the present patent application is schematically represented in a diagram, where with environment (1) we mean a generic primary or secondary source of heat or cold.
Negli scopi della presente invenzione, detto ambiente è preferibilmente: il sottosuolo, le falde acquifere, i fiumi, i laghi, il mare. For the purposes of the present invention, said environment is preferably: the subsoil, the aquifers, rivers, lakes, the sea.
Negli scopi della presente invenzione detto fluido termovettore (3) è preferibilmente scelto tra acqua distillata, acqua di fonte, acque di processo, brine, aria, fluidi refrigeranti naturali, fluidi refrigeranti artificiali. For the purposes of the present invention, said heat-carrying fluid (3) is preferably selected from distilled water, spring water, process water, brine, air, natural cooling fluids, artificial cooling fluids.
Negli scopi della presente invenzione per struttura di scambio termico si intende un dispositivo in cui si realizza lo scambio di energia termica tra detto fluido termovettore e detto ambiente. In the purposes of the present invention, by heat exchange structure is meant a device in which the exchange of thermal energy between said heat transfer fluid and said environment is carried out.
Negli scopi della presente invenzione per materiale granulare si intende un insieme di granuli o particelle sciolte o legate tra loro non soggette a fluttuazioni e moti termici e pertanto non trasportabili dal fluido termovettore. For the purposes of the present invention, by granular material is meant a set of granules or particles dissolved or bound together not subject to fluctuations and thermal motions and therefore not transportable by the heat-carrying fluid.
Il materiale granulare negli scopi della presente invenzione è preferibilmente un materiale capace di immagazzinare e diffondere calore, caratterizzato da una porosità tra 0.50 e 0.90 e una permeabilità tra 10<-5 >e 10<-6 >m<2>, preferibilmente costituito da granuli con morfologia da sub – arrotondata ad angolare con un indice di sfericità medio – basso, con un diametro medio compreso tra i 5 e i 50 mm, una superficie specifica compresa tra 40 e 400 m<-1>. Negli scopi della presente invenzione per fluido termovettore si intende una sostanza allo stato liquido oppure gassoso capace di accumulare e trasportare calore. The granular material for the purposes of the present invention is preferably a material capable of storing and diffusing heat, characterized by a porosity between 0.50 and 0.90 and a permeability between 10 <-5> and 10 <-6> m <2>, preferably consisting of granules with morphology from sub - rounded to angular with a medium - low sphericity index, with an average diameter between 5 and 50 mm, a specific surface between 40 and 400 m <-1>. In the purposes of the present invention, by heat transfer fluid is meant a substance in a liquid or gaseous state capable of accumulating and transporting heat.
Detto fluido termovettore fluisce attraverso la detta struttura di scambio termico riempita di detto materiale granulare. Said heat transfer fluid flows through said heat exchange structure filled with said granular material.
Detto materiale granulare favorisce i fenomeni di dispersione termica, incrementando notevolmente il coefficiente di conducibilità termica effettiva del fluido termovettore con conseguente aumento del coefficiente di scambio termico per convezione e quindi dell’efficienza di scambio termico. Said granular material favors the phenomena of thermal dispersion, significantly increasing the coefficient of effective thermal conductivity of the heat transfer fluid with a consequent increase in the coefficient of heat exchange by convection and therefore in the efficiency of heat exchange.
Ulteriore oggetto della presente invenzione è un dispositivo per il recupero e la dissipazione di calore secondo il metodo in accordo con la presente invenzione. In particolare, detto dispositivo è caratterizzato dal fatto di comprendere: A further object of the present invention is a device for the recovery and dissipation of heat according to the method in accordance with the present invention. In particular, said device is characterized in that it comprises:
i. un primo tubo dove fluisce il fluido termovettore, avente alla estremità inferiore un filtro per il passaggio del suddetto fluido termovettore; the. a first tube where the heat-carrying fluid flows, having at its lower end a filter for the passage of said heat-carrying fluid;
ii. un secondo tubo disposto in modo coassiale al suddetto primo tubo con la superfice laterale a contatto con l’ambiente in modo diretto o indiretto; ii. a second tube arranged coaxially to the aforementioned first tube with the lateral surface in direct or indirect contact with the environment;
iii. uno strato di materiale poroso disposto all’interno dello spazio tra il primo tubo e il secondo tubo attraversato dal fluido termovettore, dove detto fluido termovettore scambia calore con l’ambiente. iii. a layer of porous material placed inside the space between the first pipe and the second pipe crossed by the heat transfer fluid, where said heat transfer fluid exchanges heat with the environment.
Ovviamente, un tecnico del ramo, allo scopo di soddisfare esigenze contingenti e specifiche, potrà apportare numerose modifiche alle varianti prima descritte, tutte peraltro contenute nell'ambito di protezione quale definito dalle rivendicazioni. Obviously, a person skilled in the art, in order to satisfy contingent and specific needs, can make numerous modifications to the variants described above, all of which are however contained within the scope of protection as defined by the claims.
Esempio comparativo Comparative example
Al fine di sperimentare il metodo oggetto della presente invenzione è stato realizzato un dispositivo per la dissipazione e il recupero di calore dal sottosuolo in cui il metodo in accordo con la presente invenzione è stato implementato. In order to experiment with the method object of the present invention, a device for dissipating and recovering heat from the subsoil has been created in which the method according to the present invention has been implemented.
Nelle sue parti essenziali il dispositivo consiste in: In its essential parts, the device consists of:
i. Un primo tubo in polietilene PE100 dello spessore di 2 mm, del diametro di 50 mm e un’altezza di 2 m, avente alla estremità inferiore un tratto finestrato di un’altezza pari a 0.1 m. the. A first pipe in polyethylene PE100 with a thickness of 2 mm, with a diameter of 50 mm and a height of 2 m, with a windowed section of a height of 0.1 m at the lower end.
ii. Un secondo tubo in acciaio AISI 304 dello spessore di 2mm, del diametro di 125 mm e un’altezza di 2 m disposto in modo coassiale al tubo in polietilene e sigillato idraulicamente e termicamente alla estremità inferiore e superiore, con una uscita alla estremità superiore per il passaggio del fluido termovettore. ii. A second pipe in AISI 304 steel with a thickness of 2mm, with a diameter of 125 mm and a height of 2 m arranged coaxially to the polyethylene pipe and hydraulically and thermally sealed at the lower and upper ends, with an outlet at the upper end for the passage of the heat transfer fluid.
iii. Materiale granulare sciolto di origine calcarea, caratterizzato da una porosità di 0.53, una permeabilità di 8×10<-6 >m<2>, da una densità di 2200 kg/m<3 >una conducibilità termica di 2.4 W/mK, una capacità termica di 1100 J/(kgK), con una morfologia dei granuli subangolare con un indice di sfericità medio basso, con un diametro medio dei granuli di 40 mm, con una superficie specifica media di 65 m<-1>, disposto all’interno dello spazio tra il primo tubo e il secondo tubo. iii. Loose granular material of calcareous origin, characterized by a porosity of 0.53, a permeability of 8 × 10 <-6> m <2>, a density of 2200 kg / m <3> a thermal conductivity of 2.4 W / mK, a heat capacity of 1100 J / (kgK), with a sub-angular granule morphology with a medium-low sphericity index, with an average diameter of the granules of 40 mm, with an average specific surface of 65 m <-1>, arranged at the inside the space between the first tube and the second tube.
iv. Un fluido termovettore costituito da acqua di fonte caratterizzato da una densità di 999.61 kg/m<3>, una viscosità di 0.001 Pa×s, una capacità termica di 4186.92 J/KgK, una conducibilità termica di 0.59 W/mK ad una temperatura di 20 °C. iv. A heat transfer fluid consisting of spring water characterized by a density of 999.61 kg / m <3>, a viscosity of 0.001 Pa × s, a thermal capacity of 4186.92 J / KgK, a thermal conductivity of 0.59 W / mK at a temperature of 20 ° C.
Il dispositivo è installato nel sottosuolo ad una profondità tra 2 e 4 m del piano campagna che presenta una temperatura di 15 °C. The device is installed underground at a depth between 2 and 4 m of the ground level which has a temperature of 15 ° C.
Il dispositivo in accordo con la presente invenzione è collegato ad un circuito idraulico che, nelle sue parti essenziali, è costituito da una tubazione di mandata e ritorno, una pompa idraulica per la circolazione del fluido termovettore con inverter che permette di regolare la portata, un boiler elettrico termostatato per il riscaldamento del fluido termovettore, un chiller per il raffreddamento del fluido termovettore. Il detto circuito idraulico permette la circolazione del fluido termovettore all’interno del dispositivo di scambio termico. La portata del fluido, nonché la temperatura di ingresso e di uscita sono costantemente monitorate. The device in accordance with the present invention is connected to a hydraulic circuit which, in its essential parts, consists of a delivery and return pipe, a hydraulic pump for the circulation of the heat transfer fluid with an inverter that allows to regulate the flow rate, a thermostated electric boiler for heating the heat transfer fluid, a chiller for cooling the heat transfer fluid. The said hydraulic circuit allows the circulation of the heat transfer fluid inside the heat exchange device. The fluid flow rate, as well as the inlet and outlet temperature are constantly monitored.
Inizialmente lo spazio tra il primo tubo e il secondo tubo non è riempito con il materiale granulare. Nella tabella seguente sono riportati i risultati di 6 prove di scambio termico della durata di 72 ore effettuate sul dispositivo di scambio termico senza la presenza di materiale Initially, the space between the first tube and the second tube is not filled with the granular material. The following table shows the results of 6 heat exchange tests lasting 72 hours carried out on the heat exchange device without the presence of material
granulare. granular.
Temperatura in Temperatura in Portata Potenza per unità di lunghezza ingresso (°C) uscita (°C) (l/min) scambiata (W/m) Temperature in Temperature in Flow Power per unit of length inlet (° C) outlet (° C) (l / min) exchanged (W / m)
28 15.34 0.11 48.53 28 15.34 0.11 48.53
28 20.11 0.24 65.92 28 20.11 0.24 65.92
28 25.27 0.90 85.29 28 25.27 0.90 85.29
2 14.47 0.11 48.15 2 14.47 0.11 48.15
2 10.71 0.20 61.25 2 10.71 0.20 61.25
2 5.25 0.70 80.21 2 5.25 0.70 80.21
Tabella 1. Risultati delle prove di scambio termico senza la presenza del materiale granulare. Table 1. Results of the heat exchange tests without the presence of the granular material.
Successivamente lo spazio tra il primo tubo e il secondo tubo è stato riempito con il suddetto Subsequently, the space between the first tube and the second tube was filled with the aforementioned
materiale granulare. Nella tabella seguente sono riportati i risultati di 6 prove di scambio granular material. The following table shows the results of 6 exchange tests
termico della durata di 72 ore effettuate sul dispositivo di scambio termico con la presenza 72-hour heat performed on the heat exchange device with the presence
di materiale granulare. of granular material.
Temperatura in Temperatura in Portata Potenza per unità di lunghezza ingresso (°C) uscita (°C) (l/min) scambiata (W/m) Temperature in Temperature in Flow Power per unit of length inlet (° C) outlet (° C) (l / min) exchanged (W / m)
28 15.49 0.20 86.49 28 15.49 0.20 86.49
28 20.63 0.47 119.72 28 20.63 0.47 119.72
28 24.94 1.39 147.62 28 24.94 1.39 147.62
2 14.76 0.19 84.18 2 14.76 0.19 84.18
2 10.08 0.40 113.94 2 10.08 0.40 113.94
2 5.49 1.16 142.96 2 5.49 1.16 142.96
Tabella 2. Risultati delle prove di scambio termico con la presenza del materiale granulare. Table 2. Results of the heat exchange tests with the presence of the granular material.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT201800007278A IT201800007278A1 (en) | 2018-07-20 | 2018-07-20 | Method for heat dissipation and recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT201800007278A IT201800007278A1 (en) | 2018-07-20 | 2018-07-20 | Method for heat dissipation and recovery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT201800007278A1 true IT201800007278A1 (en) | 2020-01-20 |
Family
ID=63834502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT201800007278A IT201800007278A1 (en) | 2018-07-20 | 2018-07-20 | Method for heat dissipation and recovery |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | IT201800007278A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3938592A (en) * | 1970-03-23 | 1976-02-17 | Ivan Timofeevich Aladiev | Rock-exploitation method based on thermodynamic cycles utilizing in-situ energy source |
| DE3013241A1 (en) * | 1980-04-03 | 1981-10-08 | Elektro-Stahlbau H.J. Behncke, 8011 Putzbrunn | Heat pump heat exchanger - has pipe containing filler material of good heat conductivity, leaving free passages |
| US4323113A (en) * | 1980-10-31 | 1982-04-06 | Troyer Leroy S | Underground air tempering system |
| WO2009050795A1 (en) * | 2007-10-17 | 2009-04-23 | Geo Power System Co., Ltd. | Air-conditioning system utilizing natural energy and building using the same |
-
2018
- 2018-07-20 IT IT201800007278A patent/IT201800007278A1/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3938592A (en) * | 1970-03-23 | 1976-02-17 | Ivan Timofeevich Aladiev | Rock-exploitation method based on thermodynamic cycles utilizing in-situ energy source |
| DE3013241A1 (en) * | 1980-04-03 | 1981-10-08 | Elektro-Stahlbau H.J. Behncke, 8011 Putzbrunn | Heat pump heat exchanger - has pipe containing filler material of good heat conductivity, leaving free passages |
| US4323113A (en) * | 1980-10-31 | 1982-04-06 | Troyer Leroy S | Underground air tempering system |
| WO2009050795A1 (en) * | 2007-10-17 | 2009-04-23 | Geo Power System Co., Ltd. | Air-conditioning system utilizing natural energy and building using the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4279294A (en) | Heat pipe bag system | |
| KR101220521B1 (en) | Apparatus for earth heat exchange using capillary-type heat pipe, apparatus for preventing road-freezing and bridge-freezing, and apparatus for heating and cooling using earth heat exchange | |
| JP6009138B2 (en) | Geothermal utilization system | |
| CN101696829A (en) | Method for remotely transferring and storing geothermal energy, device and application thereof | |
| JP5042716B2 (en) | Heat pump system and geothermal well | |
| ES2459241A1 (en) | Heat storage system and method for the charging and discharging thereof | |
| ES2378492T3 (en) | Manifold | |
| US10401057B2 (en) | Induced groundwater flow closed loop geothermal system | |
| CN107830751A (en) | A kind of efficient CO2Gas cooler | |
| IT201800007278A1 (en) | Method for heat dissipation and recovery | |
| CN202549556U (en) | Transformer heat pipe radiating device | |
| JP2013148255A (en) | Heat exchanger and heat exchanger module | |
| CN203546705U (en) | Stabilization structure of highland building foundation | |
| CN204043219U (en) | A kind of direct-insert pressure-bearing formula solar water heater and solar thermal collector | |
| JP2014025688A (en) | Heat exchange unit | |
| CN102759222B (en) | Irregular heat exchanging pipe of ground source heat pump heat exchanger | |
| CN202547093U (en) | Heating water tank for water source heat pump | |
| CN207730062U (en) | A kind of efficient CO2Gas cooler | |
| EP2896910A1 (en) | Geothermal probe | |
| CN200941022Y (en) | High efficiency passive refrigeration heat conductive rods | |
| ITMI20082077A1 (en) | REFINED GEOTHERMAL PROBE | |
| CN102368026A (en) | Underwater high-efficiency heat exchange coil for still water areas | |
| CN201787841U (en) | Plate type heat pipe waste water and heat recycling device | |
| CN103759562B (en) | One-way heat transfer valve | |
| CN203163572U (en) | Buried heat exchange pipe and buried pipe type heat exchanger |