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WO2025028151A1 - Dispositif et procédé de diagnostic de détérioration pour échangeur de chaleur à eau - Google Patents

Dispositif et procédé de diagnostic de détérioration pour échangeur de chaleur à eau Download PDF

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Publication number
WO2025028151A1
WO2025028151A1 PCT/JP2024/024261 JP2024024261W WO2025028151A1 WO 2025028151 A1 WO2025028151 A1 WO 2025028151A1 JP 2024024261 W JP2024024261 W JP 2024024261W WO 2025028151 A1 WO2025028151 A1 WO 2025028151A1
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WIPO (PCT)
Prior art keywords
water
flow rate
temperature difference
heat exchanger
deterioration
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.)
Pending
Application number
PCT/JP2024/024261
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English (en)
Japanese (ja)
Inventor
厚 田辺
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Carrier Japan Corp
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Carrier Japan Corp
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Filing date
Publication date
Application filed by Carrier Japan Corp filed Critical Carrier Japan Corp
Publication of WO2025028151A1 publication Critical patent/WO2025028151A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • 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
    • F25B39/00—Evaporators; Condensers
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • 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
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus

Definitions

  • An embodiment of the present invention relates to a deterioration diagnosis device for a water heat exchanger and a deterioration diagnosis method for a water heat exchanger.
  • Patent Document 1 can identify the presence of scale and the location of the scale, it cannot determine how the heat exchanger has deteriorated, that is, the deterioration pattern of the heat exchanger.
  • possible deterioration patterns include deterioration due to blockage of the flow path and deterioration due to scale that inhibits heat transfer, and if it is possible to determine the pattern of deterioration, more appropriate measures can be taken.
  • this embodiment provides a deterioration diagnosis device and a deterioration diagnosis method that can determine the pattern of deterioration in a water heat exchanger that exchanges heat between the water flowing in a water pipe and the refrigerant flowing in a refrigerant pipe.
  • the deterioration diagnosis device for a water heat exchanger includes a water heat exchanger having a heat transfer section between a water pipe through which water flows and a refrigerant pipe through which a refrigerant flows, and performing heat exchange between the water flowing in the water pipe and the refrigerant flowing in the refrigerant pipe via the heat transfer section; a differential pressure flow rate determination section that determines a flow rate estimated from a pressure difference between the water pressure in the water pipe upstream of the water heat exchanger and the water pressure in the water pipe downstream of the water heat exchanger as a differential pressure flow rate; a capacity flow rate determination section that estimates the flow rate of water flowing in the water pipe based on the capacity of the water heat exchanger and determines the estimated flow rate as a capacity flow rate; an actual temperature difference determination section that determines the temperature difference between the temperature of the water flowing in the water pipe and the temperature of the refrigerant flowing in the refrigerant pipe as an actual temperature difference; and an actual temperature difference determination section that estimates the temperature difference between the temperature
  • the device includes an estimated temperature difference identification unit that identifies the estimated temperature difference, and a deterioration pattern determination unit that determines the deterioration pattern of the water heat exchanger based on the differential pressure flow rate identified by the differential pressure flow rate identification unit, the capacity flow rate identified by the capacity flow rate identification unit, the actual temperature difference identified by the actual temperature difference identification unit, and the estimated temperature difference identified by the estimated temperature difference identification unit.
  • the deterioration pattern of the water heat exchanger is determined to be a flow path blockage pattern in which the water piping is blocked, and if the actual temperature difference identified by the actual temperature difference identification unit is greater than the estimated temperature difference identified by the estimated temperature difference identification unit, the deterioration pattern of the water heat exchanger is determined to be a heat transfer inhibition pattern in which the heat transfer of the heat transfer unit is inhibited.
  • a deterioration pattern determination process that determines a deterioration pattern of the water heat exchanger based on the differential pressure flow rate determined by the differential pressure flow rate determination process, the capacity flow rate determined by the capacity flow rate determination process, the actual temperature difference determined by the actual temperature difference determination process, and the estimated temperature difference determined by the estimated temperature difference determination process.
  • the deterioration pattern of the water heat exchanger is determined to be a flow path blockage pattern in which the water piping is blocked, and if the actual temperature difference determined by the actual temperature difference determination process is greater than the estimated temperature difference determined by the estimated temperature difference determination process, the deterioration pattern of the water heat exchanger is determined to be a heat transfer inhibition pattern in which the heat transfer property of the heat transfer section is inhibited.
  • FIG. 1 is a diagram illustrating an example of the configuration of a chiller system according to a first embodiment.
  • FIG. 1 is a block diagram illustrating an example of the configuration of a control device according to a first embodiment;
  • FIG. 11 is a block diagram showing an example of the configuration of a control device according to a second embodiment;
  • FIG. 11 is a diagram illustrating an example of the configuration of a chiller system according to a second embodiment.
  • FIG. 13 is a diagram illustrating an example of the configuration of a chiller system according to a third embodiment.
  • FIG. 13 is a diagram illustrating an example of the configuration of a chiller system according to a fourth embodiment.
  • First Embodiment 1 includes a refrigeration cycle unit 200 and a user-side unit 300.
  • the chiller system 100 performs heat exchange between a refrigerant flowing through the refrigeration cycle unit 200 and water flowing through the user-side unit 300, thereby making it possible to cool or heat an object or space that is a temperature control target of the chiller system 100.
  • Compressor 201 is configured to be able to compress the refrigerant.
  • Compressor 201 is capable of changing its operating frequency, for example, by known inverter control.
  • Compressor 201 may also be configured such that its operating frequency cannot be changed, i.e., its operating frequency is fixed.
  • the expansion valve 204 is configured to have an adjustable valve opening.
  • the expansion valve 204 includes, for example, a valve body having a through hole, a needle that can move forward and backward into the through hole, and a power source that moves the needle forward and backward.
  • the expansion valve 204 blocks the flow of refrigerant in the refrigeration cycle unit 200.
  • the expansion valve 204 is in a closed state, and the opening of the expansion valve 204 is at its smallest.
  • the opening of the expansion valve 204 is at its largest.
  • the water heat exchanger 205 exchanges heat between the water flowing in the water pipe 301, which is the object of heating or cooling, and the refrigerant flowing in the refrigerant pipe 208.
  • the pump 302 pumps the water in the water pipe 301 toward the water heat exchanger 205.
  • the refrigerant heated to a high temperature by the compressor 201 is condensed in the water heat exchanger 205 and exchanges heat with the water in the water pipe 301.
  • the water heat exchanger 205 functions as a condenser that condenses the refrigerant.
  • the refrigerant that has exchanged heat with the water in the water heat exchanger 205 is depressurized in the expansion valve 204, and further exchanges heat with the air blown by the fan 203 in the air heat exchanger 202.
  • the air heat exchanger 202 functions as an evaporator that evaporates the refrigerant.
  • the refrigerant that has exchanged heat with the air in the air heat exchanger 202 is returned to the compressor 201 via the accumulator 206, heated to a high temperature again, and sent to the water heat exchanger 205.
  • the water heat exchanger 205 heats the water flowing in the water pipe 301.
  • the chiller system 100 is provided with an accumulator-side refrigerant pressure gauge 221 and an accumulator-side refrigerant thermometer 231 in a portion of the refrigerant piping 208 that is closer to the accumulator 206 than the compressor 201.
  • the chiller system 100 is also provided with an anti-accumulator-side refrigerant pressure gauge 222 and an anti-accumulator-side refrigerant thermometer 232 in a portion of the refrigerant piping 208 that is closer to the accumulator 206 than the compressor 201.
  • the chiller system 100 is provided with an upstream water pressure gauge 321 and an upstream water temperature gauge 331 in the portion of the water piping 301 upstream of the water heat exchanger 205.
  • the chiller system 100 is also provided with a downstream water pressure gauge 322 and a downstream water temperature gauge 332 in the portion of the water piping 301 downstream of the water heat exchanger 205.
  • the amount of refrigerant circulating in the refrigerant pipe 208 can be calculated based on the drive frequency of the compressor 201, the density of the refrigerant filled in the refrigerant pipe 208, and the like.
  • the density of the refrigerant filled in the refrigerant pipe 208 differs mainly depending on the type of refrigerant, but can vary depending on the amount of refrigerant filled, the ambient temperature, and the like.
  • the capacity of the water heat exchanger 205 can be estimated more accurately by also reflecting the change in temperature of the water flowing through the water pipe 301 detected by the upstream water thermometer 331 and the downstream water thermometer 332.
  • the actual temperature difference identification processing unit 403 is an example of an actual temperature difference identification unit, and is capable of executing an actual temperature difference identification process.
  • the actual temperature difference identification process is a process for identifying the temperature difference between the temperature of the water flowing in the water pipe 301 in the water heat exchanger 205 and the temperature of the refrigerant flowing in the refrigerant pipe 208 as the actual temperature difference.
  • the actual temperature difference can be defined as the temperature difference between the water and the refrigerant flowing in the water heat exchanger 205.
  • the temperature of the water flowing in the water pipe 301 in the water heat exchanger 205 can be detected by the upstream water thermometer 331 and the downstream water thermometer 332.
  • the temperature of the refrigerant flowing in the refrigerant pipe 208 can be detected by the accumulator side refrigerant thermometer 231 and the anti-accumulator side refrigerant thermometer 232.
  • the estimated temperature difference determination processing unit 404 is an example of an estimated temperature difference determination unit, and is capable of executing an estimated temperature difference determination process.
  • the estimated temperature difference determination process is a process that estimates the temperature difference between the temperature of the water flowing in the water pipe 301 in the water heat exchanger 205 and the temperature of the refrigerant flowing in the refrigerant pipe 208 based on the capacity of the water heat exchanger 205, and identifies the estimated temperature difference as the estimated temperature difference.
  • the deterioration pattern determination processing unit 405 is an example of a deterioration pattern determination unit, and is capable of executing deterioration pattern determination processing.
  • the deterioration pattern determination processing is processing for determining the deterioration pattern of the water heat exchanger 205 based on the differential pressure flow rate identified by the differential pressure flow rate identification processing unit 401, the capacity flow rate identified by the capacity flow rate identification processing unit 402, the actual temperature difference identified by the actual temperature difference identification processing unit 403, and the estimated temperature difference identified by the estimated temperature difference identification processing unit 404.
  • the deterioration pattern determination processing processing processing 405 determines that the deterioration pattern of the water heat exchanger 205 is a "flow path blockage pattern."
  • the flow path blockage pattern is a deterioration pattern in which scale has adhered to the water pipe 301, causing blockage inside the water pipe 301.
  • the predetermined reference amount for determining whether or not a "flow path blockage pattern" has occurred can be changed and set as appropriate.
  • the deterioration pattern determination processing processing processing 405 determines that the deterioration pattern of the water heat exchanger 205 is a "heat transfer inhibition pattern.”
  • the heat transfer inhibition pattern is a deterioration pattern in which scale adheres to the heat transfer section 205a, inhibiting the heat transfer of the heat transfer section 205a.
  • the predetermined reference amount for determining whether or not a "heat transfer inhibition pattern" has occurred can be changed and set as appropriate.
  • the notification processing unit 406 is an example of a notification unit, and is capable of executing notification processing.
  • the notification processing is processing for notifying the result of the deterioration pattern determination by the deterioration pattern determination processing unit 405.
  • the notification processing may, for example, be visual information via a display output device (not shown) provided in the control device 400, or auditory information via an audio output device (not shown) provided in the control device 400, or both visual and auditory information.
  • the display output device is, for example, a display, etc.
  • the audio output device is, for example, a speaker, etc.
  • the notification processing unit 406 notifies the water heat exchanger 205 that deterioration in the "flow path obstruction pattern" has occurred. In addition, if the deterioration pattern determination processing unit 405 determines that the deterioration pattern is a "thermal conductivity obstruction pattern,” the notification processing unit 406 notifies the water heat exchanger 205 that deterioration in the "thermal conductivity obstruction pattern” has occurred.
  • the notification processing unit 406 may notify that deterioration in the "flow path blockage pattern” and deterioration in the "thermal conductivity inhibition pattern” have occurred in the water heat exchanger 205, or may notify only one of the deterioration patterns.
  • a deterioration pattern with a greater degree of deterioration may be selected and notified, or a deterioration pattern designated in advance by the user may be notified.
  • the control device 400 of the chiller system 100 illustrated above can determine whether the deterioration pattern of the water heat exchanger 205 is a "flow path blockage pattern" or a "thermal conductivity inhibition pattern” based on the magnitude relationship between the differential pressure flow rate determined by the differential pressure flow rate determination processing unit 401 and the capacity flow rate determined by the capacity flow rate determination processing unit 402, and the magnitude relationship between the actual temperature difference determined by the actual temperature difference determination processing unit 403 and the estimated temperature difference determined by the estimated temperature difference determination processing unit 404.
  • deterioration of both the "flow path blockage pattern” and the “thermal conductivity inhibition pattern” may occur simultaneously, and in such a case, it can be determined that both the deterioration patterns of the "flow path blockage pattern” and the “thermal conductivity inhibition pattern” have occurred simultaneously.
  • the flow path clogging pattern In both of the two types of deterioration patterns, the "flow path clogging pattern" and the “heat transfer inhibition pattern,” the flow path in the water pipe 301 eventually becomes blocked. However, in the early stages, that is, when the flow path begins to become blocked, the following differences are observed between the two deterioration patterns. That is, in the "flow path clogging pattern,” there is a significant increase in the pressure loss of the water flowing in the water pipe 301, while in the "heat transfer inhibition pattern,” there is a significant deterioration in the heat transfer performance of the heat transfer section 205a.
  • the differential pressure flow rate determined by the differential pressure flow rate determination processing unit 401 determines whether or not a "flow path blockage pattern" has occurred.
  • the pressure loss of the water flowing in the water pipe 301 increases.
  • the differential pressure flow rate determined by the differential pressure flow rate determination processing unit 401 tends to increase due to the increased pressure loss, but the capacity flow rate determined by the capacity flow rate determination processing unit 402 is based on the capacity of the water heat exchanger 205 and is therefore less susceptible to the increased pressure loss and therefore less likely to change.
  • the actual temperature difference identified by the actual temperature difference identification processing unit 403 tends to become large due to the influence of the deterioration of the heat transfer performance, but the estimated temperature difference identified by the estimated temperature difference identification processing unit 404 is based on the capacity of the water heat exchanger 205 and is therefore less susceptible to the influence of the deterioration of the heat transfer performance, and therefore is less likely to change. Therefore, when the actual temperature difference identified by the actual temperature difference identification processing unit 403 is sufficiently larger than the estimated temperature difference identified by the estimated temperature difference identification processing unit 404, it can be determined that the deterioration pattern of the water heat exchanger 205 is a "heat transfer inhibition pattern".
  • this application discloses an embodiment that focuses on the significant differences in the deterioration patterns observed in the early stages of flow path blockage, making it possible to determine the pattern in which the water heat exchanger 205 is deteriorating.
  • the control device 400 illustrated in Fig. 3 is configured to include an actual flow rate identification processing unit 407 instead of the capacity flow rate identification processing unit 402.
  • the control device 400 executes a degradation diagnosis program to virtually realize the actual flow rate identification processing unit 407 by software.
  • the actual flow rate identification processing unit 407 may be realized by hardware, or may be realized by a combination of software and hardware.
  • the actual flow rate determination processing unit 407 is an example of an actual flow rate determination unit, and is capable of executing an actual flow rate determination process.
  • the actual flow rate determination process is a process for determining the flow rate of water actually flowing in the water pipe 301 as the actual flow rate.
  • the flow rate of water actually flowing in the water pipe 301 can be detected by a flow meter 341 as illustrated in FIG. 4.
  • the flow meter 341 is provided in a portion of the water pipe 301 upstream of the water heat exchanger 205, but as long as the portion is capable of detecting the flow rate of water actually flowing in the water pipe 301, it may be provided in, for example, a portion of the water pipe 301 downstream of the water heat exchanger 205, or in a portion of the water pipe 301 within the water heat exchanger 205.
  • the deterioration pattern determination processing unit 405 determines that the deterioration pattern of the water heat exchanger 205 is a "flow path blockage pattern" if the differential pressure flow rate identified by the differential pressure flow rate identification processing unit 401 is greater than the actual flow rate identified by the actual flow rate identification processing unit 407 by a predetermined reference amount or more.
  • the second embodiment also makes it possible to determine the pattern of deterioration of the water heat exchanger 205, which exchanges heat between the water flowing in the water pipe 301 and the refrigerant flowing in the refrigerant pipe 208.
  • differential pressure flow rate determined by the differential pressure flow rate determination processing unit 401 can be compared with an actual measured value rather than an estimated value, making it possible to more accurately determine whether or not a "flow path blockage pattern" has occurred.
  • control device 400 may be provided with an actual flow rate determination processing unit 407 along with the capacity flow rate determination processing unit 402, and any one of the flow rate values of the capacity flow rate determined by the capacity flow rate determination processing unit 402 and the actual flow rate determined by the actual flow rate determination processing unit 407 may be appropriately selected and compared with the differential pressure flow rate determined by the differential pressure flow rate determination processing unit 401.
  • the average value, median value, maximum value, minimum value, etc. may be determined for the capacity flow rate determined by the capacity flow rate determination processing unit 402 and the actual flow rate determined by the actual flow rate determination processing unit 407, and the determined value may be compared with the differential pressure flow rate determined by the differential pressure flow rate determination processing unit 401.
  • the chiller system 100 illustrated in Figure 5 is configured to have multiple, in this case two, refrigeration cycle units 200 for one user unit 300, in other words, multiple, in this case two, refrigerant pipes 208 corresponding to one water pipe 301.
  • the deterioration pattern determination processing unit 405 can determine the deterioration pattern using the capacity of the water heat exchanger 205 estimated in the relationship between one refrigerant pipe 208 and the water pipe 301, and can also determine the deterioration pattern using the capacity of the water heat exchanger 205 estimated in the relationship between the other refrigerant pipe 208 and the water pipe 301.
  • the notification processing unit 406 can notify that deterioration has occurred in the relationship with the one refrigerant pipe 208. Also, when a deterioration pattern is determined using the capacity of the water heat exchanger 205 estimated in the relationship between the other refrigerant pipe 208 and the water pipe 301, the notification processing unit 406 can notify that deterioration has occurred in the relationship with the other refrigerant pipe 208. That is, according to this configuration example, it is possible to identify which of the multiple refrigerant pipes 208 the water heat exchanger 205 is in relation to, and ultimately to identify which of the multiple refrigeration cycle units 200 the water heat exchanger 205 is in relation to.
  • the notification processing unit 406 may be configured to notify that deterioration has occurred in the water heat exchanger 205 in relation to all of the multiple refrigerant pipes 208, including the other refrigerant pipes 208.
  • the chiller system 100 illustrated in Fig. 6 has a configuration in which a plurality of water heat exchangers 205, in this case two, are connected in series on a single water pipe 301.
  • An intermediate water pressure gauge 323 and an intermediate water temperature gauge 333 are provided in a portion of the water pipe 301 between the plurality of water heat exchangers 205.
  • the configuration example of the fourth embodiment has a configuration in which a plurality of the configurations exemplified in the above-mentioned first embodiment, in this case two, are connected in series.
  • the deterioration pattern determination processing unit 405 can determine the deterioration pattern for each of the plurality of water heat exchangers 205.
  • the notification processing unit 406 can notify that deterioration has occurred in that one water heat exchanger 205. Furthermore, when a deterioration pattern is determined for the other water heat exchanger 205, the notification processing unit 406 can notify that deterioration has occurred in the other water heat exchanger 205. In other words, according to this configuration example, it is possible to identify which water heat exchanger 205 has deteriorated.
  • the notification processing unit 406 may be configured to notify that deterioration has occurred in the entire group of multiple water heat exchangers 205, including the other water heat exchangers 205.
  • Embodiments This embodiment is not limited to the above-mentioned embodiments, and various modifications and extensions can be made without departing from the spirit of the present invention.
  • an embodiment may be made by appropriately combining at least two or more of the above-mentioned embodiments.
  • the differential pressure flow rate, the capacity flow rate, the actual temperature difference, and the estimated temperature difference are not limited to the above-mentioned identification methods, and can be identified using various well-known methods.
  • 205 indicates a water heat exchanger
  • 205a indicates a heat transfer section
  • 208 indicates a refrigerant piping
  • 301 indicates a water piping
  • 400 indicates a control device (water heat exchanger deterioration diagnosis device)
  • 401 indicates a differential pressure flow rate identification processing unit (differential pressure flow rate identification unit)
  • 402 indicates a capacity flow rate identification processing unit (capacity flow rate identification unit)
  • 403 indicates an actual temperature difference identification processing unit (actual temperature difference identification unit)
  • 404 indicates an estimated temperature difference identification processing unit (estimated temperature difference identification unit)
  • 405 indicates a deterioration pattern determination processing unit (deterioration pattern determination unit)
  • 407 indicates an actual flow rate identification processing unit (actual flow rate identification unit).

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

Selon le présent mode de réalisation d'un dispositif de diagnostic de détérioration pour un échangeur de chaleur à eau, lorsqu'un débit à pression différentielle spécifié par une unité de spécification de débit à pression différentielle est supérieur à un débit de capacité spécifié par une unité de spécification de débit de capacité, une unité de détermination de modèle de détérioration détermine qu'un modèle de détérioration de l'échangeur de chaleur à eau est un modèle de fermeture de trajet d'écoulement dans lequel l'intérieur d'un tuyau d'eau est fermé et, lorsqu'une différence de température réelle spécifiée par une unité de spécification de différence de température réelle est supérieure à une différence de température estimée spécifiée par une unité de spécification de différence de température estimée, l'unité de détermination de modèle de détérioration détermine que le modèle de détérioration de l'échangeur de chaleur à eau est un modèle d'inhibition de transfert de chaleur dans lequel le transfert de chaleur d'une unité de transfert de chaleur est inhibé.
PCT/JP2024/024261 2023-07-31 2024-07-04 Dispositif et procédé de diagnostic de détérioration pour échangeur de chaleur à eau Pending WO2025028151A1 (fr)

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JP2023124381A JP7597870B1 (ja) 2023-07-31 2023-07-31 水熱交換器の劣化診断装置、水熱交換器の劣化診断方法
JP2023-124381 2023-07-31

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WO2025028151A1 true WO2025028151A1 (fr) 2025-02-06

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005345046A (ja) * 2004-06-07 2005-12-15 Hitachi Ltd 熱源機器の劣化診断システム
JP2014114993A (ja) * 2012-12-07 2014-06-26 Asahi Kokusai Techneion Co Ltd 熱交換器運転装置
JP2020176729A (ja) * 2019-04-15 2020-10-29 リンナイ株式会社 熱源装置
WO2021250789A1 (fr) * 2020-06-09 2021-12-16 三菱電機株式会社 Dispositif à cycle de réfrigération
CN116431987A (zh) * 2023-03-16 2023-07-14 内蒙古领益智能科技有限公司 一种换热器在线故障诊断和动态除垢方法及系统

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005345046A (ja) * 2004-06-07 2005-12-15 Hitachi Ltd 熱源機器の劣化診断システム
JP2014114993A (ja) * 2012-12-07 2014-06-26 Asahi Kokusai Techneion Co Ltd 熱交換器運転装置
JP2020176729A (ja) * 2019-04-15 2020-10-29 リンナイ株式会社 熱源装置
WO2021250789A1 (fr) * 2020-06-09 2021-12-16 三菱電機株式会社 Dispositif à cycle de réfrigération
CN116431987A (zh) * 2023-03-16 2023-07-14 内蒙古领益智能科技有限公司 一种换热器在线故障诊断和动态除垢方法及系统

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