JP2010014323A - Deterioration diagnosing device, deterioration diagnosing method, and deterioration diagnosing system for cold supply system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To separately compute the deterioration of performance caused by the stain of a tube and equipment of a cold supply system, and to display the diagnosed result of a deteriorated state and a maintenance measure proposal. <P>SOLUTION: A factory shipment time performance computing section 110 of a deterioration diagnosing device 10 computes a coefficient of performance in a factory shipment time of the cold supply system 20, and a tube stain deterioration computing section 120 computes the deterioration of performance caused by the stain of the tube using measured data acquired from the cold supply system 20 and a cold supply system specification DB 310. A tube and equipment stain deterioration computing section 130 computes the deterioration of the entire performance caused by the stain of the tube and equipment, and an equipment stain deterioration computing section 140 computes the deterioration of performance caused by the stain of the equipment by subtracting a deteriorated portion caused by the stain of the tube from the computed result. A display control section 400 displays the diagnosed result of the deteriorated state and the maintenance measure proposal on a display part 600. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a deterioration diagnosis device, a deterioration diagnosis method, and a deterioration diagnosis system for a cooling / heating supply system.

  First, the configuration of the cold energy supply system will be described. FIG. 7 is a diagram showing an outline of the configuration of the cold energy supply system. As shown in FIG. 7, the cold supply system 20 includes a compressor 23 that compresses a gaseous refrigerant, and a condenser that condenses and liquefies the refrigerant by exchanging heat between the compressed refrigerant and cooling water. 21, an expansion valve 24 that decompresses the condensed and liquefied liquid refrigerant, and an evaporator 22 that evaporates and vaporizes the liquid refrigerant by exchanging heat between the decompressed liquid refrigerant and cold water. Yes.

  In the conventional deterioration diagnosis relating to the maintenance of the cold supply system 20 as described above, the pressures of the condenser 21 and the evaporator 22 are detected, and the condenser 21 detects the set condenser pressure calculated from the condenser pressure and the set condensation temperature. The deterioration state of the condenser 21 is evaluated, and tube contamination due to cooling water is monitored. Similarly, the evaporator 22 has a technique for taking the difference between the evaporator pressure and the set evaporation pressure calculated from the set evaporation temperature, evaluating the deterioration state of the evaporator 22 and monitoring the tube contamination due to cold water ( For example, see Patent Document 1).

In addition, as basic data for deterioration diagnosis, not only measured values from each sensor such as a temperature sensor and a pressure sensor provided in the cooling power supply system 20, but also a heat transfer area of the condenser 21 and a flow passage cross-sectional area of the cooling water. Device shape data such as There is a technique for performing diagnosis by calculating a deterioration diagnosis index directly related to a deterioration phenomenon such as a heat transmission rate, an in-tube heat transfer rate, and a fouling coefficient from these data (see, for example, Patent Document 2).
JP 2005-345046 A JP 2001-153505 A

  However, the techniques described in Patent Document 1 and Patent Document 2 do not take into account the aging deterioration of devices such as the condenser 21, the evaporator 22, the compressor 23, and the like. It is a diagnostic system. Therefore, deterioration due to contamination of the equipment of the cold energy supply system 20 is not taken into account, and the degree of deterioration cannot be accurately grasped. As a result, periodic inspections for maintenance measures such as equipment replacement or overhaul accompanying deterioration due to equipment contamination must be performed even if the equipment performance has not deteriorated. In addition, although the performance of the equipment is degraded, there is a problem that inspection is not performed and maintenance measures are delayed.

  In view of such a background, the present invention has been made, and it is possible to separate and grasp deterioration due to tube dirt and equipment dirt, and display a diagnosis result and a maintenance countermeasure proposal. An object is to provide a device, a deterioration diagnosis method, and a deterioration diagnosis system.

  In order to solve the above-described problem, in the deterioration diagnosis device, the deterioration diagnosis method, and the deterioration diagnosis system of the cooling / heating system according to the present invention, the factory performance calculation unit of the deterioration diagnosis device And the tube dirt deterioration calculation unit calculates the performance deterioration due to the tube dirt using the measurement data acquired from the cold heat supply system and the cold heat supply system specification database. In addition, the tube and equipment contamination deterioration calculation unit calculates the overall performance deterioration due to tube contamination and device contamination, and the device contamination deterioration calculation unit subtracts the deterioration due to tube contamination from the calculation result, thereby causing the device contamination. Calculate performance degradation. Further, the display control unit displays the diagnosis result of the deterioration state and the maintenance countermeasure plan on the display unit (display device).

  According to the present invention, a deterioration diagnosis device, a deterioration diagnosis method, and a deterioration diagnosis of a cooling / heating system capable of separately grasping deterioration due to tube contamination and device contamination and displaying the diagnosis result and a maintenance measure proposal. A system can be provided.

  Next, the best mode for carrying out the present invention (referred to as “embodiment”) will be described in detail with reference to the drawings as appropriate.

FIG. 1 is a functional block diagram illustrating a configuration example of a deterioration diagnosis system that performs deterioration diagnosis of a cooling / heating supply system according to the present embodiment.
As shown in FIG. 1, the deterioration diagnosis system 1 according to the present embodiment includes a cooling / heating supply system 20 (20a,..., 20n) including a measurement data recording database (DB) 200 (200a,. The deterioration diagnosis apparatus 10 connected to the cold / heat supply system 20 via the information communication network 30 is configured.

As shown in FIG. 7, the cold heat supply system 20 is a heat source device that includes a condenser 21, an evaporator 22, a compressor 23, and an expansion valve 24.
The cold supply system 20 is provided with various sensors for measuring temperature, pressure, and the like. The cooling / heating supply system 20 records measurement data measured by various sensors in the measurement data recording database 200, and transmits the recorded measurement data to the deterioration diagnosis apparatus 10 via the information communication network 30.

  Returning to FIG. 1, the measurement data recording database 200 includes an auxiliary storage device such as a hard disk or a flash memory, and is provided in the cooling / heating system 20, for example, a condenser cooling water inlet (outlet) temperature measured by a temperature sensor, It is necessary for deterioration diagnosis of the cooling / heating supply system 20 such as a condenser pressure measurement value measured by the pressure sensor, and records measurement data measured by various sensors.

  Next, the degradation diagnosis apparatus 10 includes a control unit 101, a storage unit 300, a communication unit 500, and a display unit (display device) 600.

  The control unit 101 includes a deterioration diagnosis calculation unit 100 and a display control unit 400. The control unit 101 is realized by, for example, a CPU (Central Processing Unit) developing and executing a program stored in the storage unit 300 of the deterioration diagnosis apparatus 10 in a RAM (Random Access Memory).

  The deterioration diagnosis calculation unit 100 is configured to include a factory performance calculation unit 110, a tube contamination deterioration calculation unit 120, a tube and device contamination deterioration calculation unit 130, and a device contamination deterioration calculation unit 140.

  The factory performance calculation unit 110 calculates a coefficient of performance (COP) indicating the performance at the time of factory shipment (at the time of initial installation) from the specification data of the cooling / heating system specification database 310 in the storage unit 300 described later. To do. Here, the coefficient of performance at the time of factory shipment is assumed to be “COP0”.

  The tube dirt deterioration calculating unit 120 calculates the cooling heat from the measurement data acquired from the cooling / heating supply system 20, the specification data of the cooling / heating supply system specification database 310, and the factory coefficient of performance calculated by the factory performance calculating unit 110. A tube dirt deterioration performance coefficient (“COP1”) indicating the degree of deterioration due to tube dirt of the supply system 20 is calculated.

  The tube and equipment contamination deterioration calculation unit 130 is a correction database 330 that stores measurement data acquired from the cooling / heating supply system 20, specification data of the cooling / heating supply system specification database 310, and correction information related to load factor, cooling water, and cooling water. From the above, the tube and equipment contamination deterioration coefficient of performance (“COP2”) indicating the degree of deterioration of the cold heat supply system 20 including both tube contamination and equipment contamination is calculated.

  The equipment contamination deterioration calculation unit 140 includes a degree of deterioration including both the tube contamination and the equipment contamination calculated by the tube and the equipment contamination deterioration calculation unit 130, and a degree of deterioration due to the tube contamination calculated by the tube contamination deterioration calculation unit 120. Is calculated, and an equipment contamination deterioration performance coefficient (“COP3”) indicating the degree of equipment contamination deterioration is calculated.

  Next, the display control unit 400 includes a deterioration diagnosis calculation result display unit 410 and a maintenance measure plan display unit 420. The result of the deterioration diagnosis calculated by the deterioration diagnosis calculation unit 100 and a maintenance measure plan based on the diagnosis result. Is displayed on the display unit 600.

  The deterioration diagnosis calculation result display unit 410 displays the deterioration diagnosis calculation result calculated by the deterioration diagnosis calculation unit 100. Specifically, the deterioration diagnosis calculation result display unit 410 is calculated by the tube dirt deterioration performance coefficient (“COP1”) calculated by the tube dirt deterioration calculation unit 120 in the deterioration diagnosis calculation unit 100 and the device dirt deterioration calculation unit 140. The device contamination deterioration coefficient of performance (“COP3”) is distinguished and displayed on the display unit 600 in time series as a deterioration diagnosis calculation result (see FIG. 5 described later).

  Based on the processing result of the degradation diagnosis calculation result display unit 410, the maintenance measure proposal display unit 420 uses a predetermined threshold value stored in the maintenance information database 350 storing maintenance information, and causes tube contamination and device contamination. Whether or not a maintenance measure is necessary is determined, and as a result, a diagnosis result and a maintenance measure proposal corresponding to the type and degree of deterioration are displayed on the display unit 600 (see FIG. 6 described later).

  Returning to FIG. 1, the storage unit 300 includes an auxiliary storage device such as a hard disk or a flash memory, and includes a cooling / heating system specification database (DB) 310, a correction database (DB) 330, a deterioration history database (DB) 340, And a maintenance information database (DB) 350.

The cold heat supply system specification database 310 stores shape data such as the condenser tube outer diameter (inner diameter) at the time of factory shipment or initial installation, and various specification data such as heat transfer characteristic data.
The correction database 330 stores load factor information, cooling water information, and chilled water information. The correction information is information for correcting to the standard state based on the outside air temperature and the operating condition of the cold energy supply system 20.
Further, in the deterioration history database 340, for each cooling / heating system 20, the deterioration diagnosis calculation unit 100 calculates the factory performance coefficient, the tube dirt deterioration coefficient, the tube and equipment dirt deterioration coefficient, the equipment Degradation diagnosis calculation result information indicating the stain deterioration coefficient is stored as a history of deterioration diagnosis.
The maintenance information database 350 stores a threshold value for determining whether or not to perform maintenance on performance deterioration of tube dirt or equipment dirt, and countermeasures corresponding thereto.

Next, the communication unit 500 receives the measurement data recorded in the measurement data recording database 200 of the cooling / heating supply system 20 via the information communication network 30 and transfers it to the control unit 101.
The display unit 600 is configured by a liquid crystal display, for example, and displays a deterioration diagnosis calculation result, a performance deterioration diagnosis result, a maintenance countermeasure plan, and the like under the control of the display control unit 400.

  Next, referring to FIG. 1, the flow of processing of the deterioration diagnosis apparatus according to the present embodiment will be described along FIGS. 2 to 6.

  FIG. 2 is a diagram for explaining the flow of processing of the factory performance calculation unit according to the present embodiment. As shown in FIG. 2, the factory performance calculation unit 110 performs calculation processing using the specification data stored in the cooling / heating supply system specification database 310 in the storage unit 300 and performs the factory performance coefficient (“COP0”). The process which calculates is performed.

  First, the factory performance calculation unit 110 includes a condenser cooling water flow rate 311, a condenser cooling water specific heat 312, a condenser cooling water density 313, and a condenser cooling water stored in the cold energy supply system specification database 310. The temperature difference 314 is acquired, and the condenser exchange heat quantity (factory condenser exchange heat quantity) 111 is calculated by the calculation formula (Equation 1).

        QC = Gw · cpw · ρw · Twd (Equation 1)

  Here, QC is the condenser exchange heat quantity 111, Gw is the condenser cooling water flow rate 311, cpw is the condenser cooling water specific heat 312, ρw is the condenser cooling water density 313, and Twd is the condenser cooling water temperature difference 314. Yes. Further, the condenser cooling water specific heat 312 may be calculated from the cooling water inlet temperature or the cooling water outlet temperature at the time of shipment.

  Next, the factory shipment performance calculation unit 110 calculates the evaporator replacement heat amount (factory shipment evaporator replacement heat amount) from the condenser exchange heat amount 111 calculated in (Equation 1) and the motor output 315 by the calculation formula (Equation 2). ) 112 is calculated.

        QE = QC-Mo (Equation 2)

  Here, QE indicates the evaporator exchange heat quantity 112, and Mo indicates the motor output 315.

  Next, the factory shipment performance calculation unit 110 calculates the factory shipment performance coefficient 113 from the evaporator exchange heat quantity 112 calculated in (Equation 2) and the motor output 315 by the calculation formula (Equation 3).

        COP0 = QE / Mo (Expression 3)

Here, “COP 0” indicates the factory performance coefficient 113.
Also, the factory performance calculator 110 stores the factory performance coefficient 113 obtained in (Equation 3) in the deterioration history database 340.
In this manner, the factory performance calculation unit 110 can obtain the factory performance coefficient (“COP0”) 113 of the cooling / heating supply system 20.

Next, the processing of the tube dirt deterioration calculation unit 120 in the deterioration diagnosis calculation unit 100 shown in FIG. 1 will be described.
FIG. 3 is a diagram for explaining the flow of processing of the tube dirt deterioration calculating unit according to the present embodiment. As shown in FIG. 3, the tube dirt deterioration calculation unit 120 includes the measurement data acquired from the measurement data recording database 200 of the cooling / heating supply system 20 via the information communication network 30 and the specifications stored in the cooling / heating supply system specification database 310. A calculation process is performed using the data, and a process of calculating the tube dirt deterioration performance coefficient (“COP1”) is performed.
In this case, the deterioration diagnosis apparatus 10 obtains measurement data via the information communication network 30 from the measurement data recording database 200a of one of the cold energy supply systems 20 (20a,..., 20n), for example, the cold energy supply system 20a. It is assumed that it has been acquired. Moreover, the deterioration diagnosis apparatus 10 receives the measurement data recorded in the measurement data recording data base 200 (200a,..., 200n) from each of the cooling / heating supply systems 20 (20a,..., 20n) at a predetermined timing set by the user. It can be acquired.

  First, the tube dirt deterioration calculation unit 120 calculates the refrigerant condensing temperature 121 by the calculation formula (Equation 4) using the condenser pressure measurement value 203 which is measurement data acquired from the measurement data recording database 200 of the cooling / heating supply system 20. To do.

        TC = ft (pC) (Expression 4)

  Here, TC is the refrigerant condensing temperature 121, ft is a function determined by the type of refrigerant, and pC is the condenser pressure measurement value 203.

  Next, the tube dirt deterioration calculating unit 120 calculates the condenser heat exchange temperature from the condenser cooling water inlet temperature measured value 201, the condenser cooling water outlet temperature measured value 202, and the refrigerant condensing temperature 121 by a calculation formula (Equation 5). The difference 122 is calculated.

        ΔTC = {(TC−TwCi) + (TC−TwCo)} / 2 (Expression 5)

Here, ΔTC indicates the condenser heat exchange temperature difference 122, TwCi indicates the condenser cooling water inlet temperature measured value 201, and TwCo indicates the condenser cooling water outlet temperature measured value 202.
Moreover, you may obtain | require the condenser heat exchange temperature difference 122 by the logarithm average temperature difference (DELTA) LTC shown in a formula (Formula 6).

ΔLTC = {(TC−TwCi) − (TC−TwCo)}
/ Ln {(TC-TwCi) / (TC-TwCo)} (Equation 6)

  Next, the tube dirt deterioration calculating unit 120 performs the condenser cooling water inlet temperature measurement value 201, the condenser cooling water outlet temperature measurement value 202, the condenser cooling water flow rate measurement value 204, the condenser cooling water specific heat measurement value 205, and the condensation. The condenser exchange heat quantity 123 is calculated from the measured value 206 of the cooling water density of the condenser by the formula (Equation 7).

        QCc = Gwc · ρwc · cpwc · (TwCo−TwCi) (Expression 7)

Here, QCc is a condenser exchange heat quantity 123, Gwc is a condenser cooling water flow rate measurement value 204, ρwc is a condenser cooling water density measurement value 206, cpwc is a condenser cooling water specific heat measurement value 205, and TwCo is a condenser cooling water. The outlet temperature measurement value 202 and TwCi indicate the condenser cooling water inlet temperature measurement value 201.
Further, the condenser cooling water specific heat measurement value 205 may be calculated from the condenser cooling water inlet temperature measurement value 201 and the condenser cooling water outlet temperature measurement value 202 by the calculation formula (Equation 8).

        cpwc = fc (TwC) (Equation 8)

  Here, TwC represents the condenser cooling water temperature, and (Equation 8) is a function for obtaining the cooling water specific heat of the condenser from the condenser cooling water temperature.

  Next, the tube fouling deterioration calculation unit 120 calculates the calculation formula (Equation 9) from the condenser heat exchange temperature difference 122, the condenser exchange heat quantity 123, and the condenser heat transfer area 316 stored in the cold supply system specification database 310. To calculate the condenser heat passage rate 124.

        KC = QCc / (AC · ΔTC) (Equation 9)

Here, KC represents the condenser heat transfer rate 124, AC represents the condenser heat transfer area 316, and ΔTC represents the condenser heat exchange temperature difference 122.
Note that the condenser heat transfer area 316 uses the area outside the tube in this embodiment.

  Next, the tube fouling deterioration calculating unit 120 calculates a calculation formula (several numbers) from the condenser heat transfer area 316, the condenser exchange heat amount rated value 317, and the condenser temperature difference rated value 318 stored in the cold energy supply system specification database 310. The condenser heat passage rate rated value 125 is calculated by 10).

        KCo = QCo / (AC · ΔTCo) (Equation 10)

  Here, KCo represents the condenser heat passage rate rated value 125, QCo represents the condenser exchange heat capacity rated value 317, and ΔTCo represents the condenser temperature difference rated value 318.

  Next, the tube dirt deterioration calculating unit 120 includes the condenser heat passage rate 124, the condenser heat passage rate rated value 125, the condenser pipe outer diameter 319 and the condenser pipe inner diameter 320 stored in the cold heat supply system specification database 310. From the calculation formula (Equation 11), the condenser pipe contamination coefficient 126 is calculated.

        γc = (doc / dic) · {(1 / KC) − (1 / KCo)} (Expression 11)

  Here, γc is the condenser coefficient in the condenser tube 126, doc is the condenser pipe outer diameter 319, dic is the condenser pipe inner diameter 320, KC is the condenser heat passage rate 124, and KCo is the condenser heat passage rate rated value 125. ing.

  Next, the tube fouling deterioration calculation unit 120 calculates the tube fouling deterioration performance coefficient 127 by the calculation formula (Equation 12) using the condenser pipe fouling coefficient 126 calculated by (Equation 11).

        COP1 = COP0 · α · γc (12)

Here, “COP1” is a tube dirt deterioration performance coefficient 127, and α is a coefficient representing the characteristics of the device.
Further, the tube dirt deterioration calculation unit 120 stores the condenser pipe dirt coefficient 126 and the tube dirt deterioration performance coefficient 127 obtained in (Equation 11) and (Equation 12) in the deterioration history database 340.
In this way, the tube dirt deterioration calculation unit 120 can obtain the tube dirt deterioration coefficient of performance (“COP1”) 127 of the cold heat supply system 20.

Next, the processing of the tube and equipment contamination deterioration calculation unit 130 in the deterioration diagnosis calculation unit 100 shown in FIG. 1 will be described.
FIG. 4 is a diagram for explaining the flow of processing of the tube and the equipment contamination deterioration calculating unit according to the present embodiment. As shown in FIG. 4, the tube and equipment contamination deterioration computing unit 130 is stored in the measurement data acquired from the measurement data recording database 200 of the cooling / heating system 20 via the information communication network 30 and the cooling / heating system specification database 310. The calculation data is calculated using the specified specification data and the correction database 330, and the tube and equipment contamination deterioration coefficient (“COP2”) is calculated.
In addition, the equipment contamination deterioration calculation unit 140 includes the tube and the equipment contamination deterioration performance coefficient ("COP2") calculated by the tube and equipment contamination deterioration calculation unit 130, and the condenser pipe calculated by the tube contamination deterioration calculation unit 120 in FIG. Using the dirt coefficient 126, a process for calculating the equipment dirt deterioration result coefficient (“COP3”) is performed.

  First, the tube and equipment contamination deterioration calculating unit 130 measures the compressor current value measured value obtained from the motor input 321 and the motor output 315 stored in the cold supply system specification database 310 and the measurement data recording database 200. From 207, the compressor power consumption 131 is calculated by the calculation formula (Formula 13).

        Wc = Ci / Vi / Mo / Mi (Expression 13)

Here, Wc is the compressor power consumption 131, Ci is the measured compressor current value 207, Vi is the received voltage, Mo is the motor output 315, and Mi is the motor input 321.
Moreover, the condenser exchange heat quantity 132 is calculated | required by a formula (Formula 7).

  Next, the tube and equipment contamination deterioration calculating unit 130 calculates the evaporator exchange heat amount 133 from the compressor power consumption 131 and the condenser exchange heat amount 132 by the calculation formula (Equation 14).

        QEc = QCc−Wc (Equation 14)

  Here, QEc is the evaporator exchange heat amount 133, and QCc is the condenser exchange heat amount 132.

  Next, the tube and equipment contamination deterioration calculating unit 130 calculates an actual measurement coefficient of performance (COP) 134 from the compressor power consumption 131 and the evaporator exchange heat amount 133 by a calculation formula (Equation 15).

        COP actual measurement value = QEc / Wc (Equation 15)

  Here, the COP actual measurement value is an actual measurement performance coefficient (COP) 134.

  Next, the tube and equipment contamination deterioration calculating unit 130 calculates the load factor 135 from the refrigeration capacity 322 stored in the cold heat supply system specification database 310 and the actual measurement coefficient of performance (COP) 134 by the calculation formula (Equation 16). To do.

        x = QEc ′ / QC (Expression 16)

  Here, x is the load factor 135, QEc ′ is the refrigerating capacity 322, and QC is the condenser exchange heat quantity 111 of the calculation formula (Equation 1).

  Next, the tube and equipment contamination deterioration calculating unit 130 calculates the calculated value by the calculation formula (Equation 17) from the condenser cooling water inlet temperature measured value 201 and the load factor 135 which are measurement data acquired from the measurement data recording database 200. A coefficient of performance (COP) 136 is calculated.

        COP calculation value = fr (TwCi, x) (Expression 17)

  Here, the COP calculation value indicates a calculation value coefficient of performance (COP) 136, and (Equation 17) is a function for obtaining the COP calculation value from the condenser cooling water inlet temperature measurement value (TwCi) 201 and the load factor 135. is there.

  Next, using the load factor information stored in the correction database 330, the tube and device contamination deterioration calculating unit 130 calculates the load factor correction coefficient 331 from the calculation formula (Equation 18).

        CL = fL (x) (Equation 18)

  Here, CL indicates a load factor correction coefficient 331, which is obtained as a function of the load factor 135.

  Next, the tube and equipment contamination deterioration calculation unit 130 uses the cooling water information stored in the correction database 330 to calculate the cooling water correction coefficient 332 from the calculation formula (Equation 19).

        CC = fTwC (TwCi) (Equation 19)

  Here, CC represents the cooling water correction coefficient 332, and is obtained as a function of the condenser cooling water inlet temperature measured value (TwCi) 201.

  Next, the tube and equipment contamination deterioration calculating unit 130 uses the cold water information stored in the correction database 330 to calculate the cold water correction coefficient 333 from the calculation formula (Equation 20).

        CE = fTwE (TwEo) (Equation 20)

  Here, CE represents the cold water correction coefficient 333, and is obtained as a function of the measured cold water outlet temperature (TwEo) 208.

  Next, the tube and equipment contamination deterioration calculating unit 130 calculates the tube and equipment contamination deterioration performance coefficient 137 from the measured value coefficient of performance (COP) 134, the load factor correction coefficient 331, the cooling water correction coefficient 332, and the cold water correction coefficient 333. And is calculated from the calculation formula (Equation 21).

        COP2 = COP measured value / CL / CC / CE (Expression 21)

  Here, “COP2” indicates a tube and equipment contamination deterioration coefficient 137.

  In this way, the tube and equipment contamination deterioration calculating unit 130 can obtain the tube and equipment contamination deterioration coefficient of performance (“COP2”) 137 of the cold heat supply system 20.

  Next, the equipment contamination deterioration calculation unit 140 uses the condenser pipe contamination coefficient 126 (see FIG. 3) calculated by the tube contamination deterioration calculation unit 120 and the tube and equipment contamination deterioration calculated by the tube and equipment contamination deterioration calculation unit 130. From the performance coefficient 137, the equipment contamination deterioration performance coefficient 141 is calculated by the calculation formula (Equation 22).

        COP3 = COP2 / (1-β · γc) (Equation 22)

  Here, “COP3” is the equipment contamination deterioration performance coefficient 141, β is the equipment characteristic coefficient, and γc is the condenser pipe contamination coefficient 126.

In this way, it is possible to calculate the equipment contamination deterioration by removing the deterioration due to the tube contamination from the deterioration including the tube contamination and the device contamination.
The tube and equipment contamination deterioration calculating unit 130 stores the tube and equipment contamination deterioration coefficient (“COP2”) 137 calculated in (Equation 21) in the deterioration history database 340. In addition, the equipment contamination deterioration calculation unit 140 stores the equipment contamination deterioration performance coefficient (“COP3”) 141 calculated in (Equation 22) in the deterioration history database 340.

  Next, processing of the deterioration diagnosis calculation result display unit 410 and the maintenance countermeasure plan display unit 420 in the display control unit 400 shown in FIG. 1 will be described.

FIG. 5 is a diagram in which the deterioration diagnosis calculation result display unit according to the present embodiment graphs and displays the deterioration diagnosis calculation result calculated by the deterioration diagnosis calculation unit on the display unit.
The deterioration diagnosis calculation result display unit 410 acquires deterioration diagnosis calculation result information indicating each coefficient of performance (COP) calculated by the deterioration diagnosis calculation unit 100 from the deterioration history database 340 (see FIG. 1). Then, as shown in FIG. 5, the tube dirt deterioration performance coefficient “COP1”, which is deterioration of the tube dirt, and the equipment dirt deterioration performance coefficient “COP3”, which is deterioration of the equipment dirt, are distinguished and arranged in time series. indicate.
In this way, by distinguishing and displaying the performance deterioration of the tube dirt and the equipment dirt, it is possible to individually grasp the change with time of each deterioration.

Next, the processing of the maintenance measure proposal display unit 420 (see FIG. 1) will be described.
FIG. 6 is a diagram in which the maintenance measure plan display unit according to the present embodiment displays the diagnosis result of determining the degree of deterioration and the maintenance measure plan on the display unit.
As shown in FIG. 6, the maintenance measure plan display unit 420 is displayed by the deterioration diagnosis calculation unit 100 together with a graph of the deterioration diagnosis calculation result indicating the change in the degree of deterioration over time displayed by the deterioration diagnosis calculation result display unit 410. The diagnosis result and the maintenance countermeasure plan about the calculated degree of deterioration are displayed.

  Specifically, the maintenance measure plan display unit 420 acquires the current degree of deterioration calculated by the deterioration diagnosis calculation unit 100 and information about the period from the previous maintenance measure to the present. Then, these pieces of information are compared with information relating to a threshold value for determining whether or not to implement a maintenance measure stored in the maintenance information database 350 (see FIG. 1). Then, the maintenance measure proposal display unit 420 displays the diagnosis result and the maintenance measure proposal for each of the deterioration of the equipment contamination and the deterioration of the tube contamination.

For example, when the performance deterioration of the tube dirt exceeds a predetermined threshold, a display such as “Tube dirt is increasing” is displayed as shown in FIG. And as a maintenance plan, “(plan 1) brush cleaning” “(plan 2) ball cleaning from chemical cleaning, ball cleaning, neutral detergent cleaning, brush cleaning, etc. , Etc. "is displayed based on the degree of contamination and information on the timing of the previous maintenance measures.
Further, when the performance deterioration of the device contamination exceeds a predetermined threshold value, it is displayed that the device is to be replaced or overhauled.

In the example of the graph shown in FIG. 6, when the performance of the cooling heat supply system 20 due to deterioration of the tube dirt and the equipment dirt exceeds both predetermined threshold values, both the tube dirt and the equipment dirt are displayed. An example in which maintenance measures are taken at the same time for deterioration is shown. However, maintenance measures for equipment contamination and tube contamination are not performed at the same time, and based on the diagnosis result by the maintenance measure proposal display unit 420 and the maintenance measure proposal, only one of the stains having a large performance deterioration due to contamination is obtained. Maintenance measures can be taken at an appropriate time.
In this way, in the case of tube contamination, it becomes possible to carry out an optimal cleaning method at an optimal cleaning time according to the degree of deterioration. Further, in the case of equipment contamination, it is possible to grasp the deterioration of the equipment according to the operation status of each cooling / heating supply system 20 and take maintenance measures at an appropriate time. Furthermore, as a result, the maintenance cost of the whole cold energy supply system 20 can be reduced, and an increase in CO2 emission accompanying performance degradation can be prevented.

  As described above, according to the deterioration diagnosis device, the deterioration diagnosis method, and the deterioration diagnosis system of the cooling / heating system according to the present embodiment, tube dirt and equipment dirt are separated to quantitatively grasp the degree of performance deterioration. Therefore, it becomes possible to implement maintenance measures suitable for each dirt at an appropriate time.

It is a functional block diagram which shows the structural example of the deterioration diagnostic system which performs the deterioration diagnosis of the cooling-heat supply system which concerns on this embodiment. It is a figure for demonstrating the flow of a process of the factory time performance calculating part which concerns on this embodiment. It is a figure for demonstrating the flow of a process of the tube dirt deterioration calculating part which concerns on this embodiment. It is a figure for demonstrating the flow of a process of the tube which concerns on this embodiment, and an apparatus dirt deterioration calculating part. It is a figure which the deterioration diagnosis calculation result display part which concerns on this embodiment displays on a display part the deterioration diagnosis calculation result which the deterioration diagnosis calculation part calculated. It is a figure which the maintenance countermeasure plan display part concerning this embodiment displays on the display part the diagnostic result which judged the degree of degradation, and a maintenance countermeasure plan. It is the figure which showed the outline | summary of the structure of the cold-heat supply system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Degradation diagnostic system 10 Degradation diagnostic apparatus 20 Cold supply system 21 Condenser 22 Evaporator 23 Compressor 24 Expansion valve 30 Information communication network 100 Deterioration diagnostic operation part 101 Control part 110 Factory performance calculation part 111 Condenser exchange heat quantity (factory (Condenser replacement heat at the time of shipment)
112 Evaporator exchange heat (factory factory exchange heat)
113 Factory coefficient of performance (COP0)
120 Tube dirt deterioration calculation part 121 Refrigerant condensation temperature 123,132 Condenser exchange heat quantity 122 Condenser heat exchange temperature difference 124 Condenser heat passage rate 125 Condenser heat passage rate rated value 126 Condenser tube dirt coefficient 127 Tube dirt deterioration coefficient (COP1)
130 Tube and equipment contamination deterioration calculation unit 131 Compressor power consumption 133 Evaporator exchange heat amount 134 Actual measurement coefficient of performance (COP)
135 Load factor 136 Calculated coefficient of performance (COP)
137 Tube and equipment contamination degradation coefficient of performance (COP2)
140 Equipment contamination deterioration calculation unit 141 Equipment contamination deterioration coefficient of performance (COP3)
200 Measurement data recording database (DB)
201 Condenser cooling water inlet temperature measured value 202 Condenser cooling water outlet temperature measured value 203 Condenser pressure measured value 204 Condenser cooling water flow rate measured value 205 Condenser cooling water specific heat measured value 206 Condenser cooling water density measured value 207 Compression Machine current measured value 208 Chilled water outlet temperature measured value 300 Storage unit 310 Chilled heat supply system specification database (DB)
311 Condenser cooling water flow rate 312 Condenser cooling water specific heat 313 Condenser cooling water density 314 Condenser cooling water temperature difference 315 Electric motor output 316 Condenser heat transfer area 317 Condenser exchange heat capacity rated value 318 Condenser temperature difference rated value 319 Condensation Pipe outer diameter 320 Condenser pipe inner diameter 321 Motor input 322 Refrigeration capacity 330 Correction database (DB)
331 Load factor correction coefficient 332 Cooling water correction coefficient 333 Cold water correction coefficient 340 Degradation history database (DB)
350 Maintenance Information Database (DB)
400 Display control unit 410 Deterioration diagnosis calculation result display unit 420 Maintenance countermeasure plan display unit 500 Communication unit 600 Display unit

Claims (8)

A deterioration diagnosis device that is communicably connected to a cold heat supply system to which cooling water is supplied from the outside, and diagnoses performance deterioration of the cold heat supply system,
A cooling / heating supply system specification database in which specification data at the time of factory shipment or initial installation of the cooling / heating supply system is stored;
A correction database in which correction information relating to load factor, cooling water, and cooling water is stored;
A predetermined threshold value for determining whether or not a maintenance measure is necessary for each of the performance deterioration due to tube contamination and the device deterioration due to device contamination of the cold heat supply system, and a maintenance measure proposal when the maintenance measure is necessary are stored. Maintenance information database,
A factory performance calculator that calculates the factory performance of the cooling / heating system using the specification data;
Using the specification data and measurement data related to the operation status acquired from the measurement data recording database provided in the cooling and heating system, a tube dirt deterioration calculating unit that calculates performance deterioration based on the tube dirt,
Using the specification data, the measurement data, and the correction information stored in the correction database, a tube and an equipment contamination deterioration calculating unit for calculating performance deterioration based on the tubes and equipment contamination of the cooling / heating system,
Using the performance deterioration based on the tube and equipment contamination, and the performance deterioration based on the tube contamination, an equipment contamination deterioration calculating unit that calculates the performance deterioration based on the equipment contamination,
A degradation diagnosis calculation result display unit that displays performance degradation of the cooling and heating system on a display device by classifying performance degradation based on the tube dirt and performance degradation based on the equipment dirt,
Using the threshold value stored in the maintenance information database, the deterioration diagnosis of the cooling / heating system is performed, and the diagnosis result of the deterioration diagnosis and the maintenance measure proposal when the maintenance measure is required are displayed on a display device A deterioration diagnosis device for a cooling / heating system characterized by comprising a maintenance measure proposal display unit. The factory performance calculation unit is
Calculates the amount of heat exchanged at the time of shipment from the factory from the condenser cooling water flow rate, the condenser cooling water specific heat, the condenser cooling water density, and the condenser cooling water temperature difference stored in the cold supply system specification database. And
From the calculated factory-condenser exchange heat at the factory and the motor output stored in the cold supply system specification database, calculate the factory-exchange evaporator heat at the factory,
The deterioration diagnosis device for a cooling / heating system according to claim 1, wherein a coefficient of performance at the time of factory shipment is calculated from the calculated amount of heat exchanged at the time of factory evaporator and the output of the electric motor. The tube dirt deterioration calculating unit is
From the condenser pressure measurement obtained from the measurement data recording database, calculate the refrigerant condensation temperature,
The condenser heat exchange temperature difference is calculated from the condenser cooling water inlet temperature measurement value and the condenser cooling water outlet temperature measurement value obtained from the measurement data recording database,
The condenser cooling water inlet temperature measurement value, the condenser cooling water outlet temperature measurement value, the condenser cooling water flow rate measurement value, the condenser cooling water specific heat measurement value, and the condenser cooling obtained from the measurement data recording database. Calculate the condenser exchange heat from the water density measurement,
From the calculated condenser heat exchange temperature difference and condenser exchange heat amount and the condenser heat transfer area stored in the cold supply system specification database, the condenser heat passage rate is calculated,
From the condenser heat transfer area and the condenser exchange heat amount rated value and the condenser temperature difference rated value stored in the cold supply system specification database, the condenser heat passage rate rated value is calculated,
From the calculated condenser heat passage rate and condenser heat passage rate rating value and the condenser pipe outer diameter and condenser pipe inner diameter stored in the cold supply specification database, the condenser pipe contamination coefficient is calculated,
The cold supply according to claim 2, wherein a tube dirt deterioration performance coefficient is calculated from the calculated condenser pipe dirt coefficient and the factory shipping performance coefficient calculated by the factory performance calculator. System degradation diagnosis device. The tube and the equipment contamination deterioration calculating unit are
From the measured compressor current value obtained from the measurement data recording database, the motor input stored in the cold supply system specification database, and the motor output, the compressor power consumption is calculated,
Calculate the evaporator exchange heat amount from the calculated compressor power consumption and the condenser exchange heat amount calculated by the tube dirt deterioration calculation unit,
From the calculated compressor power consumption and evaporator exchange heat, calculate the actual value coefficient of performance,
From the calculated actual value coefficient of performance and the refrigeration capacity stored in the cold supply system specification database, a load factor is calculated,
From the calculated load factor and the measured value of the condenser cooling water inlet temperature, a calculated value coefficient of performance is calculated,
A load factor correction coefficient is calculated from the calculated load factor and the correction information related to the load factor stored in the correction database,
From the measured value of the condenser cooling water inlet temperature and the correction information regarding the cooling water stored in the correction database, a cooling water correction coefficient is calculated,
From the chilled water outlet temperature measurement value acquired from the measurement data recording database and the correction information relating to the chilled water stored in the correction database, a chilled water correction coefficient is calculated,
The deterioration of the cooling and heating system according to claim 3, wherein a tube and equipment contamination deterioration coefficient is calculated from the calculated actual performance coefficient, load factor correction coefficient, cooling water correction coefficient, and cold water correction coefficient. Diagnostic device. The equipment contamination deterioration calculation unit is
An equipment contamination deterioration performance coefficient is calculated from the tube and equipment contamination deterioration performance coefficient calculated by the tube and equipment contamination deterioration calculation section and the condenser pipe contamination coefficient calculated by the tube contamination deterioration calculation section. The deterioration diagnosis apparatus for a cold energy supply system according to claim 4. The factory performance coefficient calculated by the factory performance calculation unit, the tube contamination deterioration coefficient calculated by the tube contamination deterioration calculation unit, and the tube and device calculated by the tube and device contamination deterioration calculation unit A deterioration history database for storing deterioration diagnosis calculation result information including a stain deterioration performance coefficient and the device stain deterioration performance coefficient calculated by the device stain deterioration calculation unit;
6. The deterioration diagnosis calculation result display unit displays performance deterioration of the cooling / heating system in time series based on the deterioration diagnosis calculation result information stored in the deterioration history database. Deterioration diagnosis device for cold heat supply system. A deterioration diagnosis method used in a deterioration diagnosis device that is communicably connected to a cold heat supply system to which cooling water is supplied from the outside, and diagnoses performance deterioration of the cold heat supply system,
The deterioration diagnosis device is:
A cooling / heating supply system specification database in which specification data at the time of factory shipment or initial installation of the cooling / heating supply system is stored;
A correction database in which correction information relating to load factor, cooling water, and cooling water is stored;
A predetermined threshold value for determining whether or not a maintenance measure is necessary for each of the performance deterioration due to tube contamination and the device deterioration due to device contamination of the cold heat supply system, and a maintenance measure proposal when the maintenance measure is necessary are stored. Maintenance information database,
Calculate the factory performance of the cooling / heating system using the specification data,
Using the specification data and the measurement data related to the operation status acquired from the measurement data recording database provided in the cooling and heating system, the performance deterioration based on the tube dirt is calculated,
Using the specification data, the measurement data, and the correction information stored in the correction database, the performance deterioration based on the tube and equipment contamination of the cooling / heating supply system is calculated,
Using the performance deterioration based on the tube and equipment contamination and the performance deterioration based on the tube contamination, calculating the performance deterioration based on the equipment contamination,
By classifying the performance deterioration based on the tube dirt and the performance deterioration based on the equipment dirt, the performance deterioration of the cold supply system is displayed on the display device,
Using the threshold value stored in the maintenance information database, the deterioration diagnosis of the cooling / heating system is performed, and the diagnosis result of the deterioration diagnosis and the maintenance measure proposal when the maintenance measure is required are displayed on a display device A method for diagnosing deterioration of a cold energy supply system, characterized in that: A deterioration diagnosis system comprising: a cold heat supply system to which cooling water is supplied from the outside; and a deterioration diagnosis device connected to the cold heat supply system so as to be communicable and diagnosing performance deterioration of the cold heat supply system,
The cold supply system is
A measurement data recording database that records measurement data related to operating conditions related to performance deterioration of the cooling and heating system;
The measurement data recorded in the measurement data recording database is transmitted to the deterioration diagnosis device,
The deterioration diagnosis device is:
A communication unit that receives the measurement data from the cooling and heating system;
A cooling / heating supply system specification database in which specification data at the time of factory shipment or initial installation of the cooling / heating supply system is stored;
A correction database in which correction information relating to load factor, cooling water, and cooling water is stored;
A predetermined threshold value for determining whether or not a maintenance measure is necessary for each of the performance deterioration due to tube contamination and the device deterioration due to device contamination of the cold heat supply system, and a maintenance measure proposal when the maintenance measure is necessary are stored. Maintenance information database,
A factory performance calculator that calculates the factory performance of the cooling / heating system using the specification data;
Using the specification data and the measurement data acquired from the measurement data recording database, a tube dirt deterioration calculation unit that calculates performance deterioration based on the tube dirt,
Using the specification data, the measurement data, and the correction information stored in the correction database, a tube and an equipment contamination deterioration calculating unit for calculating performance deterioration based on the tubes and equipment contamination of the cooling / heating system,
Using the performance deterioration based on the tube and equipment contamination, and the performance deterioration based on the tube contamination, an equipment contamination deterioration calculating unit that calculates the performance deterioration based on the equipment contamination,
A degradation diagnosis calculation result display unit that displays performance degradation of the cooling and heating system on a display device by classifying performance degradation based on the tube dirt and performance degradation based on the equipment dirt,
Using the threshold value stored in the maintenance information database, the deterioration diagnosis of the cooling / heating system is performed, and the diagnosis result of the deterioration diagnosis and the maintenance measure proposal when the maintenance measure is required are displayed on a display device A deterioration diagnosis system, comprising: a maintenance measure proposal display unit.

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