IT202100021518A1 - INTEGRATED CIRCUIT FOR THE CIRCULATION OF REFRIGERANTS FOR GAS ABSORPTION HEAT PUMPS - Google Patents
INTEGRATED CIRCUIT FOR THE CIRCULATION OF REFRIGERANTS FOR GAS ABSORPTION HEAT PUMPS Download PDFInfo
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- IT202100021518A1 IT202100021518A1 IT102021000021518A IT202100021518A IT202100021518A1 IT 202100021518 A1 IT202100021518 A1 IT 202100021518A1 IT 102021000021518 A IT102021000021518 A IT 102021000021518A IT 202100021518 A IT202100021518 A IT 202100021518A IT 202100021518 A1 IT202100021518 A1 IT 202100021518A1
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- tube bundle
- pipes
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Classifications
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- 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
- F28D7/16—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 in parallel spaced relation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B35/00—Boiler-absorbers, i.e. boilers usable for absorption or adsorption
- F25B35/02—Boiler-absorbers, i.e. boilers usable for absorption or adsorption using a liquid as sorbent, e.g. brine
-
- 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
- F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/082—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
- F28F9/0221—Header boxes or end plates formed by stacked elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0229—Double end plates; Single end plates with hollow spaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
- F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2315/00—Sorption refrigeration cycles or details thereof
- F25B2315/002—Generator absorber heat exchanger [GAX]
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- 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
- F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F2009/0285—Other particular headers or end plates
- F28F2009/0287—Other particular headers or end plates having passages for different heat exchange media
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2210/00—Heat exchange conduits
- F28F2210/08—Assemblies of conduits having different features
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2225/00—Reinforcing means
- F28F2225/08—Reinforcing means for header boxes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2270/00—Thermal insulation; Thermal decoupling
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Sorption Type Refrigeration Machines (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Description
DOMANDA DI BREVETTO PER INVENZIONE INDUSTRIALE DAL TITOLO: PATENT APPLICATION FOR INDUSTRIAL INVENTION ENtitled:
?CIRCUITO INTEGRATO PER LA CIRCOLAZIONE DI FLUIDI FRIGORIGENI PER POMPE DI CALORE AD ASSORBIMENTO A GAS.? ?INTEGRATED CIRCUIT FOR THE CIRCULATION OF REFRIGERANTS FOR GAS ABSORPTION HEAT PUMPS.?
CAMPO DELL?INVENZIONE FIELD OF THE INVENTION
La presente invenzione si riferisce al campo tecnico delle pompe di calore ad assorbimento a gas. In ulteriore dettaglio, la presente invenzione si riferisce al campo tecnico dei circuiti chiusi per la circolazione di fluidi frigorigeni, in genere acqua-ammoniaca o acqua-bromuro di litio, per impianti di pompe di calore a gas. STATO DELLATECNICA The present invention relates to the technical field of gas absorption heat pumps. In further detail, the present invention refers to the technical field of closed circuits for the circulation of refrigerant fluids, generally water-ammonia or water-lithium bromide, for gas heat pump systems. STATE OF THE ART
La pompa di calore a gas ad assorbimento si basa su un ciclo frigorifero alternativo in cui il compressore ? sostituito da un circuito chiuso percorso da un fluido frigorigeno, in genere acqua-ammoniaca (NH3) o acqua-bromuro di litio (LiBr). A seconda delle condizioni di temperatura e di pressione in cui si trova, il fluido frigorigeno assume lo stato liquido o di vapore. Nella sua forma pi? semplificata il circuito chiuso della pompa di calore ad assorbimento ? costituito da: generatore, assorbitore, condensatore, restrittori ed evaporatore. Pi? frequentemente per ragioni di incremento dei livelli di efficienza termodinamica, il ciclo di base viene implementato con una serie di recuperi di calore interni tramite ulteriori scambiatori di calore che lavorano tra parti differenti del circuito. Diverse realizzazioni dello stato dell?arte arrivano a prevedere 3 o 4 scambiatori di recupero. The gas absorption heat pump is based on an alternative refrigeration cycle in which the compressor is replaced by a closed circuit crossed by a refrigerant fluid, usually water-ammonia (NH3) or water-lithium bromide (LiBr). Depending on the temperature and pressure conditions in which it is found, the refrigerant assumes the liquid or vapor state. In its most simplified the closed circuit of the absorption heat pump ? consisting of: generator, absorber, condenser, restrictors and evaporator. Pi? frequently for reasons of increasing thermodynamic efficiency levels, the basic cycle is implemented with a series of internal heat recovery through additional heat exchangers which work between different parts of the circuit. Several state-of-the-art realizations come to foresee 3 or 4 recovery exchangers.
Condensatore ed evaporatore sono costituiti da scambiatori (spesso realizzati come un fascio tubiero) posti contatto con i fluidi di servizio (nella pompa di calore a gas ad assorbimento ad ammoniaca possono essere acqua o aria) nei quali scorre il fluido frigorigeno che cede calore al condensatore (dal lato ad alta temperatura) e lo sottrae all?evaporatore (dal lato a bassa temperatura). The condenser and evaporator consist of exchangers (often made as a tube bundle) placed in contact with the service fluids (in the ammonia absorption gas heat pump they can be water or air) in which the refrigerant flows which transfers heat to the condenser (from the high temperature side) and subtracts it from the evaporator (from the low temperature side).
Le trasformazioni che subisce il fluido frigorigeno costituiscono il ciclo della pompa di calore a gas ad assorbimento: fornendo energia con un bruciatore a gas, il fluido frigorigeno nell?evaporazione assorbe calore dal fluido esterno e, tramite il condensatore, lo cede al mezzo da riscaldare. The transformations that the refrigerant undergoes constitute the cycle of the absorption gas heat pump: supplying energy with a gas burner, the refrigerant in the evaporation absorbs heat from the external fluid and, through the condenser, transfers it to the medium to be heated .
La presenza di fluidi frigorigeni come l?ammoniaca richiedono che il circuito sia realizzato in acciaio dato che materiali contenti metalli come alluminio, rame o zinco non sono impiegabili a causa della corrosione a cui andrebbero incontro. Quindi, dato che il circuito contenente il fluido frigorigeno deve essere a tenuta, cio? ermeticamente sigillato nei confronti dell?ambiente, la sua costruzione richiede la realizzazione di giunzioni effettuate per saldatura (welding) con tecnologie e apparecchiature diverse e pi? costose rispetto alla pi? comune giunzione per brasatura (brazing) tipica delle macchine a compressione di vapore utilizzanti gas fluorinati. The presence of refrigerant fluids such as ammonia requires that the circuit be made of steel since materials containing metals such as aluminium, copper or zinc cannot be used due to the corrosion they would encounter. So, given that the circuit containing the refrigerant fluid must be sealed, cio? hermetically sealed against the environment, its construction requires the creation of joints made by welding (welding) with different technologies and equipment and more? expensive compared to the pi? common brazing joint typical of vapor compression machines using fluorinated gases.
Inoltre, gli attuali circuiti chiusi per la circolazione di fluidi frigorigeni per gli impianti di pompe di calore a gas sono realizzati con scambiatori di calore singoli, ciascuno progettato e realizzato individualmente. Anche il collaudo degli scambiatori di calore e il loro isolamento termico vengono effettuati, per ciascuno scambiatore, singolarmente. Gli scambiatori di calore vengono infine collegati all?interno del circuito tramite dei condotti tubolari, generalmente in numero di almeno quattro per ogni scambiatore di calore (precisamente: almeno 2 per ciascun fluido - ingresso e uscita - per almeno due fluidi necessari per effettuare lo scambio termico), che vengono saldati (tramite saldatura welding) per garantirne stabilit? e tenuta. Furthermore, the current closed circuits for the circulation of refrigerants for gas heat pump systems are made with individual heat exchangers, each individually designed and manufactured. Even the testing of the heat exchangers and their thermal insulation are carried out individually for each exchanger. Finally, the heat exchangers are connected inside the circuit via tubular ducts, generally at least four in number for each heat exchanger (specifically: at least 2 for each fluid - inlet and outlet - for at least two fluids needed to carry out the exchange thermal), which are welded (through welding) to ensure stability? and held.
? chiaro che la geometria dello scambiatore a fascio tubiero richiede, ed ? normalmente realizzata tramite, due collegamenti in asse con il fascio tubiero (per il fluido contenuto nei tubi del fascio tubiero) e due collegamenti perpendicolari all?asse tubiero (per il fluido esterno al fascio e contenuto nella cd. ?shell?). ? clear that the geometry of the shell and tube exchanger requires, and ? normally made by two connections in axis with the tube bundle (for the fluid contained in the tubes of the tube bundle) and two connections perpendicular to the tube axis (for the fluid external to the bundle and contained in the so-called ?shell?).
? altres? chiaro che la procedura sopra descritta richiede l?esecuzione di numerose operazioni di saldatura manuali, per poter effettuare le quali ? necessario che il circuito abbia una certa estensione, e che i vari componenti del circuito ? e in particolare i vari scambiatori - siano opportunamente distanziati tra loro per consentire l?accesso alle apparecchiature di saldatura. ? otherwise? clear that the procedure described above requires the execution of numerous manual welding operations, in order to carry out which ? necessary that the circuit has a certain extension, and that the various components of the circuit ? and in particular the various exchangers - are suitably distanced from each other to allow access to the welding equipment.
Pertanto, la situazione dello stato dell?arte nel campo tecnico in oggetto sottolinea l?esigenza di circuiti chiusi, da impiegare per la circolazione di fluidi frigorigeni negli impianti di pompe di calore a gas, che possano efficacemente risolvere gli inconvenienti descritti e altri inconvenienti presenti nello stato attuale della tecnica. DESCRIZIONE SOMMARIA DELL?INVENZIONE Therefore, the situation of the state of the art in the technical field in question underlines the need for closed circuits, to be used for the circulation of refrigerant fluids in gas heat pump systems, which can effectively solve the problems described and other problems present in the current state of the art. SUMMARY DESCRIPTION OF THE INVENTION
La presente invenzione concerne quindi un circuito per la circolazione di ammoniaca ? o altro fluido frigorigeno - per pompe di calore ad assorbimento a gas realizzato da un'unica struttura integrata. Does the present invention therefore relate to a circuit for the circulation of ammonia? or other refrigerant fluid - for gas absorption heat pumps made from a single integrated structure.
Il circuito secondo la presente invenzione ? realizzato preferibilmente in acciaio (altri materiali, anche plastici, potrebbero in linea teorica essere impiegati), completamente a tenuta e comprende sostanzialmente tre parti componenti: un fascio tubiero comprendente una pluralit? di tubi aventi tutti sostanzialmente la stessa altezza e diametri vari, e due piastre di collegamento atte ad essere collegate, mediante saldatura, ciascuna ad una estremit? diversa del fascio tubiero. Dette piastre comprendono al loro interno una serie di collegamenti fluidici che mettono in connessione, in maniera opportuna, i vari tubi del fascio tubiero in modo da realizzare gli scambiatori di calore necessari e i loro collegamenti mutui. The circuit according to the present invention ? preferably made of steel (other materials, including plastics, could theoretically be used), completely airtight and substantially comprising three component parts: a tube bundle comprising a plurality of of pipes all having substantially the same height and various diameters, and two connection plates suitable for being connected, by welding, each at one end? different than the tube bundle. Said plates comprise within them a series of fluidic connections which connect, in an appropriate manner, the various tubes of the tube bundle so as to create the necessary heat exchangers and their mutual connections.
Le piastre possono essere realizzate aventi uno o pi? strati in modo da realizzare collegamenti fluidici diversi posti in parallelo e isolati tra loro e atti a realizzare circuiti e scambiatori di calore caratterizzati da un grado di complessit? anche molto elevato. The plates can be made having one or more? layers in order to create different fluid connections placed in parallel and isolated from each other and capable of creating circuits and heat exchangers characterized by a degree of complexity? also very high.
La presente invenzione consente di semplificare enormemente la realizzazione, il collaudo e la manutenzione di circuiti fluidici per la circolazione di ammoniaca per pompe di calore ad assorbimento, consentendo inoltre di raggiungere un livello di compattezza e di minimizzazione degli ingombri sconosciuto fino ad oggi. The present invention allows to greatly simplify the construction, testing and maintenance of fluidic circuits for the circulation of ammonia for absorption heat pumps, further allowing to reach a level of compactness and minimization of overall dimensions hitherto unknown.
In ulteriore dettaglio la presente invenzione consente la realizzazione di circuiti fluidici per la circolazione di ammoniaca per pompe di calore ad assorbimento che consente un numero di saldature molto ridotto rispetto allo stato dell?arte e consente di impiegare tecniche di saldatura (welding) automatiche e non pi? soltanto manuali, permettendo pertanto di abbattere i costi di produzione e di consentire volumi di produzione maggiori. Inoltre, le saldature richieste avranno complessivamente una lunghezza minore con immediati benefici in termini di un maggiore livello di qualit?, e di tempi e costi di produzione minori. In aggiunta, il layout del circuito fluidico che la presente invenzione permette di ottenere consente la realizzazione di test per il collaudo di ermeticit? dei singoli scambiatori e/o dell?insieme, tramite apparecchiature automatiche con conseguente miglioramento dell?affidabilit?, dei tempi e dei costi delle operazioni. In further detail, the present invention allows the creation of fluidic circuits for the circulation of ammonia for absorption heat pumps which allows a very small number of welds compared to the state of the art and allows to use automatic and non-automatic welding techniques more only manuals, thus allowing to reduce production costs and to allow higher production volumes. Furthermore, the welds required will have a shorter overall length with immediate benefits in terms of a higher level of quality, and lower production times and costs. In addition, the layout of the fluidic circuit that the present invention allows to obtain allows the carrying out of tests for the hermeticity test. of the single exchangers and/or of the whole, through automatic equipment with consequent improvement of the reliability, times and costs of the operations.
La semplificazione del processo di montaggio dei circuiti fluidici secondo la presente invenzione consente, inoltre, di realizzare l?isolamento degli scambiatori in maniera pi? semplice e immediata. The simplification of the assembly process of the fluidic circuits according to the present invention also allows to carry out the insulation of the exchangers in a more efficient way. simple and immediate.
Infine, le dimensioni ridotte del circuito fluidico che la presente invenzione consente permettono di impiegare una minore quantit? di liquido refrigerante con grossi benefici in termini di costi minori e di un migliore controllo termodinamico del funzionamento del circuito. Finally, the reduced dimensions of the fluidic circuit that the present invention allows allow to use a smaller quantity of coolant with great benefits in terms of lower costs and better thermodynamic control of circuit operation.
BREVE DESCRIZIONE DELLE FIGURE BRIEF DESCRIPTION OF THE FIGURES
Ulteriori caratteristiche e vantaggi dell?invenzione risulteranno evidenti dalla lettura della descrizione dettagliata seguente, fornita a titolo esemplificativo e non limitativo, con l?ausilio delle figure illustrate nelle tavole allegate, in cui: Further characteristics and advantages of the invention will become apparent from reading the following detailed description, provided by way of non-limiting example, with the aid of the figures illustrated in the attached tables, in which:
Fig. 1 illustra una vista di una realizzazione preferita del circuito per la circolazione di fluidi frigorigeni per pompe di calore ad assorbimento a gas secondo la presente invenzione; Fig. 1 shows a view of a preferred embodiment of the circuit for the circulation of refrigerant fluids for gas absorption heat pumps according to the present invention;
Fig. 2 illustra un dettaglio di un?estremit? del circuito secondo la presente invenzione, comprendente una delle due piastre di collegamento; Fig. 2 illustrates a detail of an?end? of the circuit according to the present invention, comprising one of the two connection plates;
Fig. 3 illustra un dettaglio dell?altra estremit? del circuito secondo la presente invenzione, comprendente una delle due piastre di collegamento e Fig. 3 shows a detail of the other end? of the circuit according to the present invention, comprising one of the two connection plates e
Fig. 4 illustra una vista in sezione di un?estremit? del circuito secondo la presente invenzione, comprendente una delle due piastre di collegamento. Fig. 4 illustrates a sectional view of one end? of the circuit according to the present invention, comprising one of the two connection plates.
La seguente descrizione di forme di realizzazione esemplificative si riferisce ai disegni allegati. Gli stessi numeri di riferimento in diversi disegni identificano gli stessi elementi o elementi simili. La seguente descrizione dettagliata non limita l'invenzione. L'ambito dell'invenzione ? definito dalle rivendicazioni allegate. The following description of exemplary embodiments refers to the accompanying drawings. The same reference numerals in different drawings identify the same or similar elements. The following detailed description does not limit the invention. The scope of the invention? defined by the attached claims.
DESCRIZIONE DETTAGLIATA DELL?INVENZIONE DETAILED DESCRIPTION OF THE INVENTION
In riferimento alla Fig. 1 allegata, una realizzazione preferita del circuito integrato per la circolazione di fluidi frigorigeni per pompe di calore ad assorbimento a gas secondo la presente invenzione comprende un fascio tubiero 10 atto a circolare un fluido frigorigeno, comprendente una pluralit? di tubi 11 aventi diametri vari, e due piastre di collegamento 12, 13 atte ad essere collegate, mediante saldatura, ciascuna ad una estremit? diversa del fascio tubiero 10. With reference to the attached Fig. 1, a preferred embodiment of the integrated circuit for the circulation of refrigerant fluids for gas absorption heat pumps according to the present invention comprises a tube bundle 10 able to circulate a refrigerant fluid, comprising a plurality of of pipes 11 having various diameters, and two connecting plates 12, 13 able to be connected, by welding, each at one end? different than the tube bundle 10.
In una realizzazione preferita dell?invenzione i tubi 11 del fascio tubiero 10 hanno tutti sostanzialmente la stessa altezza. In questo modo le piastre di collegamento 12, 13 possono avere una struttura sostanzialmente piana, pi? semplice e tale da minimizzare gli ingombri. In a preferred embodiment of the invention, the tubes 11 of the tube bundle 10 all have substantially the same height. In this way the connection plates 12, 13 can have a substantially flat structure, more? simple and such as to minimize the overall dimensions.
Detti tubi 11 del fascio tubiero 10 sono realizzati preferibilmente in acciaio cos? come le due piastre di collegamento 12, 13. Dette piastre di collegamento 12, 13 comprendono una serie di fori 14 atti ad impegnarsi, da un lato, con le estremit? dei tubi 11 di detto fascio tubiero 10, in modo da favorirne la saldatura alla piastra. I fori 14, quindi, avranno, ciascuno, forma e dimensioni compatibili con il diametro del tubo 11 corrispondente. Detti fori 14, inoltre, sono collegabili ad almeno un canale 24 interno a detta piastra 12, 13, detto almeno un canale 24 essendo atti a mettere in connessione fluidica i vari tubi 11 in modo da realizzare la struttura completa del fascio tubiero 10 di uno scambiatore di calore per pompe di calore ad assorbimento a gas. Said pipes 11 of the tube bundle 10 are preferably made of steel so such as the two connecting plates 12, 13. Said connecting plates 12, 13 comprise a series of holes 14 able to engage, on one side, with the ends? of the tubes 11 of said tube bundle 10, so as to facilitate their welding to the plate. The holes 14, therefore, will each have a shape and dimensions compatible with the diameter of the corresponding tube 11. Furthermore, said holes 14 can be connected to at least one channel 24 inside said plate 12, 13, said at least one channel 24 being able to put the various pipes 11 into fluidic connection so as to form the complete structure of the tube bundle 10 of a heat exchanger for gas absorption heat pumps.
Questi canali 24 possono anche essere realizzati su pi? strati in modo da realizzare collegamenti fluidici diversi posti in parallelo e isolati tra loro e atti a realizzare circuiti e scambiatori di calore caratterizzati da fasci tubieri aventi un grado di complessit? anche molto elevato. Le piastre 12, 13 possono, ad esempio, essere realizzate per fresatura da una piastra piana mentre i tubi 11 possono, ad esempio, essere realizzati per trafilatura o per piegatura e saldatura. These 24 channels can also be implemented on pi? layers in order to create different fluidic connections placed in parallel and isolated from each other and suitable for realizing circuits and heat exchangers characterized by tube bundles having a degree of complexity? also very high. The plates 12, 13 can, for example, be made by milling from a flat plate while the tubes 11 can, for example, be made by drawing or by bending and welding.
Detti fori 14 sono inoltre collegabili a dei tubi di connessione esterni 15 atti a collegare il fascio tubiero 10 alle altre parti di un circuito per la circolazione di fluidi frigorigeni per pompe di calore ad assorbimento a gas. Said holes 14 can also be connected to external connection pipes 15 suitable for connecting the tube bundle 10 to the other parts of a circuit for the circulation of refrigerant fluids for gas absorption heat pumps.
In una realizzazione preferita illustrata in Fig. 2, sono presenti dei raccordi 23 tra il foro 14 e i tubi 11 del fascio tubiero 10 o i tubi di connessione esterni 15. Detti raccordi 23 possono essere realizzati tramite accessori da saldare alla piastra 13 oppure tramite un procedimento di imbutitura della piastra 13 stessa. In a preferred embodiment illustrated in Fig. 2, there are fittings 23 between the hole 14 and the pipes 11 of the tube bundle 10 or the external connection pipes 15. Said fittings 23 can be made using accessories to be welded to the plate 13 or using a method drawing of the plate 13 itself.
Ulteriori realizzazioni preferite prevedono che la piastra 12, 13 presenti affacciati, sui lati opposti, fori in quantit? e diametri diversi. In Fig.2 sono riportati esempi di fori 14 di dimensioni pi? grandi, disposti su un lato della piastra 13, affacciati a una pluralit? di fori 10, di diametro minore, sull?altro lato della piastra 13. Further preferred embodiments envisage that the plate 12, 13 have facing, on the opposite sides, holes in a quantity and different diameters. In Fig.2 examples of holes 14 of dimensions pi? large, arranged on one side of plate 13, facing a plurality of holes 10, of smaller diameter, on the other side of the plate 13.
Inoltre, detta piastra 12, 13 pu? vantaggiosamente comprendere supporti 22 per effettuare la saldatura evitando o limitando le deformazioni del metallo, e scanalature 21 di taglio termico, atte a ridurre il trasferimento di calore per conduzione tra parti differenti della piastra 12, 13. Furthermore, said plate 12, 13 can? advantageously comprise supports 22 for carrying out the welding avoiding or limiting the deformations of the metal, and thermal break grooves 21, suitable for reducing the transfer of heat by conduction between different parts of the plate 12, 13.
La presente invenzione, quindi, consente la realizzazione di circuiti fluidici per la circolazione di ammoniaca, in particolare per pompe di calore ad assorbimento, che consente un numero di saldature molto ridotto rispetto allo stato dell?arte e consente di impiegare tecniche di saldatura (welding) automatiche e non pi? soltanto manuali, permettendo pertanto di abbattere i costi di produzione e di consentire volumi di produzione maggiori. Inoltre, le saldature richieste avranno complessivamente una lunghezza minore con immediati benefici in termini di un maggiore livello di qualit?, e di tempi e costi di produzione minori. In aggiunta, il layout del circuito fluidico che la presente invenzione permette di ottenere consente la realizzazione di test per il collaudo di ermeticit? dei singoli scambiatori e/o dell?insieme, tramite apparecchiature automatiche con conseguente miglioramento dell?affidabilit?, dei tempi e dei costi delle operazioni. The present invention, therefore, allows the creation of fluidic circuits for the circulation of ammonia, in particular for absorption heat pumps, which allows a very small number of welds compared to the state of the art and allows to use welding techniques (welding ) automatic and no longer? only manuals, thus allowing to reduce production costs and to allow higher production volumes. Furthermore, the welds required will have a shorter overall length with immediate benefits in terms of a higher level of quality, and lower production times and costs. In addition, the layout of the fluidic circuit that the present invention allows to obtain allows the carrying out of tests for the hermeticity test. of the single exchangers and/or of the whole, through automatic equipment with consequent improvement of the reliability, times and costs of the operations.
Vantaggi aggiuntivi connessi alla presente invenzione riguardano la semplificazione del processo di montaggio del circuito fluidico che consente di realizzare l?isolamento degli scambiatori in maniera pi? semplice e meno costosa. Additional advantages connected to the present invention concern the simplification of the assembly process of the fluidic circuit which allows to carry out the insulation of the exchangers in a more efficient way. simple and less expensive.
Le dimensioni ridotte del circuito fluidico che la presente invenzione consente, inoltre, permettono di impiegare una minore quantit? di liquido refrigerante. Una minore quantit? di liquido refrigerante comporta grossi benefici in termini di un migliore controllo termodinamico del funzionamento del circuito. Furthermore, the reduced dimensions of the fluidic circuit that the present invention allows allow to use a smaller quantity of coolant. A smaller amount? of refrigerant liquid brings great benefits in terms of a better thermodynamic control of the operation of the circuit.
Claims (12)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT102021000021518A IT202100021518A1 (en) | 2021-08-09 | 2021-08-09 | INTEGRATED CIRCUIT FOR THE CIRCULATION OF REFRIGERANTS FOR GAS ABSORPTION HEAT PUMPS |
| CN202280055275.8A CN118043619A (en) | 2021-08-09 | 2022-08-04 | Integrated circuit for circulating fluid of gas absorption heat pump |
| PCT/IB2022/057253 WO2023017373A1 (en) | 2021-08-09 | 2022-08-04 | Integrated circuit for circulating fluids for gas-absorption heat pumps |
| US18/681,661 US20240361053A1 (en) | 2021-08-09 | 2022-08-04 | Integrated circuit for circulating fluids for gas-absorption heat pumps |
| EP22761284.3A EP4384768A1 (en) | 2021-08-09 | 2022-08-04 | Integrated circuit for circulating fluids for gas-absorption heat pumps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT102021000021518A IT202100021518A1 (en) | 2021-08-09 | 2021-08-09 | INTEGRATED CIRCUIT FOR THE CIRCULATION OF REFRIGERANTS FOR GAS ABSORPTION HEAT PUMPS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT202100021518A1 true IT202100021518A1 (en) | 2023-02-09 |
Family
ID=78649682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT102021000021518A IT202100021518A1 (en) | 2021-08-09 | 2021-08-09 | INTEGRATED CIRCUIT FOR THE CIRCULATION OF REFRIGERANTS FOR GAS ABSORPTION HEAT PUMPS |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20240361053A1 (en) |
| EP (1) | EP4384768A1 (en) |
| CN (1) | CN118043619A (en) |
| IT (1) | IT202100021518A1 (en) |
| WO (1) | WO2023017373A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040049915A1 (en) * | 2002-09-17 | 2004-03-18 | Framatome Anp | Method for prestressing tubes of a heat exchanger with precise tailoring of the prestress |
| US20090205543A1 (en) * | 1998-12-16 | 2009-08-20 | Paul Wurth S.A. | Cooling plate for an iron- or steelmaking furnace |
| US20120157719A1 (en) * | 2009-01-21 | 2012-06-21 | Basf Se | Tube bundle reactor for uncatalyzed or homogeneously catalyzed reactions |
-
2021
- 2021-08-09 IT IT102021000021518A patent/IT202100021518A1/en unknown
-
2022
- 2022-08-04 WO PCT/IB2022/057253 patent/WO2023017373A1/en not_active Ceased
- 2022-08-04 CN CN202280055275.8A patent/CN118043619A/en active Pending
- 2022-08-04 US US18/681,661 patent/US20240361053A1/en active Pending
- 2022-08-04 EP EP22761284.3A patent/EP4384768A1/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090205543A1 (en) * | 1998-12-16 | 2009-08-20 | Paul Wurth S.A. | Cooling plate for an iron- or steelmaking furnace |
| US20040049915A1 (en) * | 2002-09-17 | 2004-03-18 | Framatome Anp | Method for prestressing tubes of a heat exchanger with precise tailoring of the prestress |
| US20120157719A1 (en) * | 2009-01-21 | 2012-06-21 | Basf Se | Tube bundle reactor for uncatalyzed or homogeneously catalyzed reactions |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4384768A1 (en) | 2024-06-19 |
| CN118043619A (en) | 2024-05-14 |
| US20240361053A1 (en) | 2024-10-31 |
| WO2023017373A1 (en) | 2023-02-16 |
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