JP2011208861A - Device and method for managing performance of heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and a method for managing performance of a heat exchanger capable of easily determining whether a heat transfer pipe of the heat exchanger functions as designed or not.SOLUTION: The heat exchanger performance managing device 10 accepts inlet temperature of a cooled medium, inlet temperature of a cooling medium, and set temperature. Next, the heat exchanger performance managing device 10 calculates a necessary area for cooling the cooled medium to the set temperature based on a predetermined value related to heat-exchange between the cooling medium and the cooled medium, and the temperature of the cooled medium and the temperature of the cooling medium which it accepted, and calculates a heat transfer pipe effective area where heat exchange is performed based on a surface area and the number of the heat transfer tubes. The heat exchanger performance managing device 10 measures outlet temperature of the cooled medium, and determines that the heat exchanger is abnormal when the calculated necessary area is smaller than the calculated effective area while the measured temperature of the cooled medium is higher than the accepted set temperature.

Description

  The present invention relates to a heat exchanger performance management apparatus and method.

  Conventionally, factories with large-scale lubricating oil systems and cooling water systems that cover all facilities like power plants have the temperatures required by each system for the temperature of the fluid flowing through those systems. The heat exchanger is controlled as follows.

  Here, the heat exchanger will be described. FIG. 6 is a schematic diagram showing the configuration of the heat exchanger 500. In FIG. 6, in the heat exchanger 500, the cooling medium flows from the cooling water inlet 501, flows through the heat transfer pipe 521, and flows out from the cooling water outlet 502. The cooled medium flows in from the cooled water inlet 511, flows between the heat transfer tubes 521, and flows out of the cooled water outlet 512. The heat exchanger 500 performs heat exchange between the cooling medium such as cooling water and seawater flowing through the heat transfer tube 521 and the cooling medium flowing between the heat transfer tubes 521 through the heat transfer tubes 521. Cool the cooling medium.

  Here, in the heat exchanger, when foreign matter is mixed inside the heat transfer tube or clogging occurs due to the generation of foreign matter, the efficiency of heat exchange between the cooling medium and the medium to be cooled via the heat transfer tube Becomes lower and the cooling capacity decreases. For example, if the cooling capacity is reduced and the temperature of the cooled medium does not drop during power plant operation, the heat exchanger is inspected for openness, the cooling capacity is reduced due to clogged heat transfer tubes, or other causes It is investigated whether the cooling capacity is reduced. However, as a result of performing an open inspection of the heat exchanger, there are cases where it is found that the cooling capacity is not lowered due to clogging of the heat transfer tubes. For example, the temperature of seawater used as the cooling medium may be higher than the assumed temperature. In the case of such a cause, the heat exchanger open inspection work becomes useless work.

  Patent Documents 1 to 4 that disclose techniques for grasping the cause of abnormality before opening the heat exchanger and evaluating the performance of the heat exchanger during operation are known in the decline in the cooling capacity of the heat exchanger. Yes.

  The abnormality monitoring device disclosed in Patent Document 1 detects the inlet temperature and outlet temperature of the cooling medium, the inlet temperature and outlet temperature of the medium to be cooled, and the ambient air temperature around the equipment, and based on the detected temperatures. A discrimination parameter is calculated, and the water flow state of the cooling medium is discriminated by comparing the calculated parameter with an allowable value.

  The performance monitor disclosed in Patent Document 2 measures the output temperature, input temperature and flow rate of the heat exchange medium (cooling medium), and the temperature of the heat exchange surface area, and the actual heat transfer rate, nominal heat transfer rate, The ratio (fouling rate) is calculated. The performance monitor determines the cleanliness of the heat exchange surface based on the value of the fouling rate.

  The monitoring device disclosed in Patent Document 3 is a monitoring device that monitors the heat exchange capability of the heat exchanger to detect contamination of the heat exchanger, and includes an inlet temperature and an outlet temperature of the heat exchange medium (cooling medium). And the outlet temperature of the fluid to be cooled (cooled medium) is measured. In the normal operation, the monitoring device has an outlet temperature of the fluid to be cooled (cooled medium) exceeding a second predetermined value (T1) and an inlet temperature of the heat exchange medium (cooling medium) is a third predetermined value. When (T2) is exceeded, a display prompting that the temperature of the heat exchange medium (cooling medium) is high is performed, the outlet temperature of the fluid to be cooled (cooled medium) exceeds the second predetermined value (T1), and When the inlet temperature of the heat exchange medium (cooling medium) is less than the third predetermined value (T2), the difference between the outlet temperature of the heat exchange medium (cooling medium) and the inlet temperature of the heat exchange medium (cooling medium) is When the value is less than a predetermined value (T0) of 1, a message for prompting the cleaning of the cooler is displayed. When the value exceeds the first predetermined value (T0), an insufficient flow rate of the heat exchange medium (cooling medium) is displayed.

  The abnormality monitoring device disclosed in Patent Document 4 is an abnormality monitoring device capable of determining an abnormality in a heat exchanger, and includes various process measurement units, a differential pressure calculation unit, a performance calculation unit, and a determination unit. I have. The abnormality monitoring device monitors both the differential pressure of the feed water pressure at the inlet and outlet of the heat exchanger and the heat exchange performance of the heat exchanger, and simultaneously monitors the opening of the drain water level control valve as necessary. To monitor scale film formation and other abnormalities.

JP-A-57-43198 JP-A-60-207900 Japanese Utility Model Publication No. 2-85283 Japanese Patent Laid-Open No. 5-39902

  However, the abnormality monitoring device disclosed in Patent Document 1 is a device that parameterizes the conditions of the inlet temperature and the outlet temperature and monitors the abnormality by a combination of comparisons with allowable values. For example, the abnormality monitoring device is caused by clogging of heat transfer tubes. It is not a device that specifically monitors whether or not the cooling capacity is reduced. Moreover, since the performance monitor disclosed by patent document 2 calculates the cleanliness | purity of a heat exchange surface, only the information about the clogging of a heat exchanger tube is obtained. The monitoring device disclosed in Patent Document 3, for example, determines whether the heat exchanger is clogged or the cooling medium flow rate is insufficient regardless of the inlet temperature of the cooling medium when the cooling medium is not cooled. Depending on the inlet temperature of the cooling medium, when the cooling medium flow rate is not insufficient, the lack of cooling medium flow rate may be displayed. The abnormality monitoring device disclosed in Patent Literature 4 requires various process measurement units. For example, when it is desired to know only whether the cooling capacity is reduced due to clogging of heat transfer tubes, in terms of cost, etc. Not realistic.

  Therefore, there is a demand for an apparatus that can easily determine whether or not a heat transfer tube of a heat exchanger functions as designed.

  An object of the present invention is to provide a heat exchanger performance management apparatus and method that can easily determine whether or not a heat transfer tube of a heat exchanger functions as designed.

  The present invention provides the following solutions.

  (1) In a heat exchanger that cools the cooling medium by performing heat exchange between the cooling medium flowing through the plurality of heat transfer tubes and the cooling medium flowing between the plurality of heat transfer tubes via the heat transfer tubes. A heat exchanger performance management device for managing the performance of the heat exchanger, wherein the temperature of the medium to be cooled at an inlet where the medium to be cooled flows into the heat exchanger, and the heat medium being the heat exchanger Receiving means for receiving a temperature of the cooling medium at an inlet flowing into the cooling medium and a set temperature that is a temperature at which the heat exchanger cools the medium to be cooled; and the cooling target to the set temperature received by the receiving means The required area, which is the area of the heat transfer tube necessary for cooling the medium, is set to a predetermined value related to heat exchange between the cooling medium and the medium to be cooled, and the object to be cooled received by the receiving means. The required area calculating means for calculating based on the body temperature and the temperature of the cooling medium, and the effective area, which is the area of the heat transfer tube where heat exchange is performed, are calculated based on the surface area and number of the heat transfer tubes. The effective area calculation means, the measurement means for measuring the temperature of the cooling medium at the outlet where the cooling medium cooled by the heat exchanger flows out of the heat exchanger, and the required area calculation means When the required area is smaller than the effective area calculated by the effective area calculating unit and the temperature of the medium to be cooled measured by the measuring unit is higher than the set temperature received by the receiving unit, the heat A heat exchanger performance management device comprising: an abnormality determination unit that determines that the exchanger is abnormal.

  According to the configuration of (1), the heat exchanger performance management device according to the present invention includes the temperature of the medium to be cooled at the inlet at which the medium to be cooled flows into the heat exchanger, and the inlet at which the cooling medium flows into the heat exchanger. And a set temperature that is a temperature at which the heat exchanger cools the medium to be cooled. Next, the heat exchanger performance management device determines a necessary area, which is an area of the heat transfer tube necessary for cooling the cooled medium to the received set temperature, to a predetermined temperature related to heat exchange between the cooling medium and the cooled medium. It calculates based on the value, the temperature of the received cooling medium, and the temperature of the cooling medium, and calculates the effective area, which is the area of the heat transfer tube where heat exchange is performed, based on the surface area and the number of heat transfer tubes. The heat exchanger performance management device measures the temperature of the cooled medium at the outlet where the cooled cooled medium flows out of the heat exchanger, and the calculated required area is smaller than the calculated effective area and is measured. When the temperature of the cooled medium is higher than the accepted set temperature, it is determined that the heat exchanger is abnormal.

  That is, the heat exchanger performance management device calculates the required area of the heat transfer tube from the received inlet temperature of the cooling medium, the inlet temperature of the cooling medium, and the set temperature, calculates the effective area, and calculates the required area. However, when the calculated effective area is smaller and the measured outlet temperature of the medium to be cooled is higher than the accepted set temperature, it is determined that the heat exchanger is abnormal. Therefore, in the heat exchanger performance management device according to the present invention, the heat transfer tube of the heat exchanger functions as designed by the received cooling medium and the inlet temperature of the cooling medium and the measured outlet temperature of the cooling medium. It can be easily determined whether or not.

  (2) When it is determined that the abnormality is detected by the abnormality determination unit, the number of heat transfer tubes that have not been subjected to heat exchange among the heat transfer tubes is determined based on the difference between the required area and the effective area. The heat exchanger performance management device according to (1), further comprising: a number calculation means for calculating.

  According to the configuration of (2), when the heat exchanger performance management device is determined to be abnormal, heat exchange was not performed among the heat transfer tubes based on the difference between the required area and the effective area. Calculate the number of heat transfer tubes. Therefore, when the heat exchanger performance management device of (2) judges that the heat exchanger tubes of the heat exchanger are not functioning as designed, it should easily indicate the number of heat exchanger tubes that have not been subjected to heat exchange. Can do.

  (3) Cooled medium temperature measuring means for measuring the temperature of the cooled medium at the inlet where the cooled medium flows into the heat exchanger, and the cooling medium at the inlet where the cooled medium flows into the heat exchanger The heat exchanger performance management device according to (1) or (2), further comprising: a cooling medium temperature measuring unit that measures the temperature of the heat exchanger.

  According to the configuration of (3), the heat exchanger performance management device measures the temperature of the medium to be cooled at the inlet where the medium to be cooled flows into the heat exchanger, and cools the inlet at which the cooling medium flows into the heat exchanger. Measure the temperature of the medium. Therefore, the heat exchanger performance management device of (3) is based on the measured cooling medium and the inlet temperature of the cooling medium, the received set temperature, and the measured outlet temperature of the cooling medium. Can more easily determine whether or not is functioning as designed.

  (4) In the heat exchanger that cools the cooled medium by performing heat exchange between the cooling medium flowing through the plurality of heat transfer tubes and the cooled medium flowing between the plurality of heat transfer tubes via the heat transfer tubes. A method executed by a heat exchanger performance management device that manages the performance of the heat exchanger, wherein the temperature of the medium to be cooled at an inlet where the medium to be cooled flows into the heat exchanger, and the cooling medium A receiving step for receiving the temperature of the cooling medium at the inlet flowing into the heat exchanger and a set temperature that is a temperature at which the heat exchanger cools the medium to be cooled, and the set temperature received by the receiving step The required area, which is the area of the heat transfer tube necessary for cooling the cooled medium, is determined by a predetermined value related to heat exchange between the cooling medium and the cooled medium, and the receiving step. The required area calculation step of calculating based on the received temperature of the medium to be cooled and the temperature of the cooling medium, and the effective area that is the area of the heat transfer tube in which heat exchange is performed, the surface area of the heat transfer tube and An effective area calculating step for calculating based on the number calculation, a step for measuring a temperature of the cooling medium at an outlet where the cooling medium cooled by the heat exchanger flows out of the heat exchanger, and the required area The required area calculated by the calculating step is smaller than the effective area calculated by the effective area calculating step, and the temperature of the medium to be cooled measured by the measuring step is received by the receiving step. Determining that the heat exchanger is abnormal if higher.

  Therefore, the method executed by the heat exchanger performance management device that manages the performance of the heat exchanger is based on the received cooling medium, the inlet temperature of the cooling medium, and the measured outlet temperature of the cooling medium. It is possible to easily determine whether or not the heat transfer tube functions as designed.

  The present invention can easily determine whether or not the heat transfer tube of the heat exchanger functions as designed. Therefore, this invention can grasp | ascertain the present operating condition of a heat exchanger, and can judge easily whether it is necessary to open and inspect a heat exchanger. Furthermore, according to the present invention, it is possible to quickly determine whether or not the heat transfer tube is functioning as designed, thereby enhancing the monitoring operation of the heat exchanger.

It is a functional block diagram which shows the function of the heat exchanger performance management apparatus which concerns on one Embodiment of this invention. It is a block diagram which shows the hardware constitutions of the heat exchanger performance management apparatus which concerns on one Embodiment of this invention. It is a flowchart which shows the processing content of the heat exchanger performance management apparatus which concerns on one Embodiment of this invention. In a heat exchanger performance management device concerning one embodiment of the present invention, it is a figure showing an example which receives entrance temperature and preset temperature, and an example of a display of judgment. It is a functional block diagram which shows the function of Embodiment 2 of the heat exchanger performance management apparatus which concerns on one Embodiment of this invention. It is the schematic which shows the structure of a heat exchanger.

[Embodiment 1]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a functional block diagram showing functions of a heat exchanger performance management apparatus 10 according to an embodiment of the present invention. The heat exchanger performance management apparatus 10 includes a receiving unit 11 as a receiving unit, a required area calculating unit 12 as a required area calculating unit, an effective area calculating unit 13 as an effective area calculating unit, and a measuring unit as a measuring unit. 14, an abnormality determination unit 15 as an abnormality determination unit, and a number calculation unit 16 as a number calculation unit. And the heat exchanger performance management apparatus 10 manages the performance of the heat exchanger 500 based on a required area required in order to cool a to-be-cooled medium, and the effective area of the heat exchanger tube 521. FIG.

  The receiving unit 11 includes a temperature of the cooling medium at the inlet where the cooling medium flows into the heat exchanger 500, a temperature of the cooling medium at the inlet where the cooling medium flows into the heat exchanger 500, and the cooling medium as a heat exchanger. A set temperature, which is a temperature at which 500 is cooled, is received. For example, the reception unit 11 displays a message for receiving the temperature of the cooling medium, the temperature of the cooling medium, and the set temperature on a display device (for example, the display unit 2014 in FIG. 2 described later), and is input from the operation unit. Accept each data. The input data is stored in the storage unit (for example, auxiliary storage unit 2015 in FIG. 2 described later) as the cooling medium inlet temperature, the cooling medium inlet temperature, and the set temperature of the cooling medium.

  The necessary area calculation unit 12 relates to the necessary area, which is the area of the heat transfer tube 521 necessary for cooling the cooling medium to the set temperature received by the receiving unit 11, for heat exchange between the cooling medium and the cooling medium. Calculation is performed based on the predetermined value, the temperature of the medium to be cooled and the temperature of the cooling medium received by the receiving unit 11. Here, the predetermined values related to heat exchange are, for example, the flow rate, specific heat, and specific gravity of the medium to be cooled, the flow rate of the cooling medium, specific heat, specific gravity, and the like. The predetermined values related to the heat exchange may be received by the receiving unit 11.

For example, the required area calculation unit 12 calculates the required area of the heat transfer tube 521 that is required to lower the medium to be cooled to the set temperature by the following formula.
Necessary area = heat exchange / (heat transmissivity x logarithm average temperature difference)

Here, the exchange heat amount = (ti-to) × Go × Cp × γ × 4.186 / 3600. In this equation, ti is the inlet temperature of the medium to be cooled ° C, to is the set temperature ° C, Go is the flow rate of the medium to be cooled t / h, Cp is the specific heat of the medium to be cooled, γ is the specific gravity kg / m ^{3 of} the medium to be cooled, 4.186 is a unit conversion (the specific heat of water is 1 cal / g = 4.186 J / g), and 3600 is a constant for converting the cooling medium flow rate into a flow rate per second.

Further, the heat transmissivity = 1 / designed heat transfer resistance + tube fouling resistance.
In this equation, the design heat transfer resistance and the tube fouling resistance are values determined when the heat exchanger 500 is designed.

Logarithmic average temperature difference = B / ln ((A + B) / (AB)) (ln is a natural logarithm). In this formula,
A = cooled medium inlet temperature + set temperature−cooling medium inlet temperature−cooling medium outlet temperature,
B = √ (cooled medium inlet temperature−set temperature) ² + (cooling medium outlet temperature−cooling medium inlet temperature) ²

The outlet temperature (To) of the cooling medium is calculated as To = Ti + ΔT.
Here, Ti is the coolant inlet temperature, and ΔT is the temperature rise of the coolant.
ΔT is calculated by the equation: ΔT = H / Gw × Cwp × γw × (4.186 / 3600).
Here, H is the exchange heat quantity W, Gw is the cooling medium flow rate t / h, Cwp is the specific heat of the cooling medium, and γw is the specific gravity kg / m ³ of the cooling medium.

For example, when the inlet temperature of the cooling medium is 39.88 ° C., the inlet temperature of the cooling medium is 30.00 ° C., the set temperature is 35 ° C., and the cooling medium flow rate is 1440 kg / h,
Exchange heat quantity = (39.88-35) * 1440 * 1.00 * 1000 * 4.186 / 3600 = 8,171,072W = 7,027,200 cal / h.
In addition, the heat transmissivity is determined by the instruction manual of the heat exchanger 500, etc.
1853.4 kcal / m ² h ° C. = 2155.50 W / m ² ° C.

And when the coolant flow rate is 1620 kg / h,
ΔT = 8,171,072 / (1620 * 0.94 * 1.025 * (4.186 / 3600)) = 4.5021 ° C. The cooling medium outlet temperature is
To = 30 + 4.5021 = 34.5021 ° C.
Then, the logarithm average temperature difference is
A = 39.88 + 35-30-34.50 = 10.38,
Since B = √ (39.88−35) ² + (34.50−30) ² = 6.64,
Logarithmic average temperature difference = 6.64 / ln ((10.38 + 6.64) / (10.38−6.64)) = 4.3808.
The required area is 8,171,072 / (2155.50 * 4.3808) = 865.315 m ² .

The effective area calculation unit 13 calculates an effective area that is an area of the heat transfer tubes 521 in which heat exchange is performed based on the surface area and the number of the heat transfer tubes 521. For example, the effective area calculation unit 13 calculates the effective area by the following formula.
Effective area (for bare tube) = π x tube outer diameter x number of heat transfer tubes x effective tube length Effective area (for fin tube) = area per unit length x number of heat transfer tubes x effective tube length

For example, in a bare tube, when the tube outer diameter is 0.01905 m, the number of heat transfer tubes is 2,068, and the tube effective length is 7.676 m, the effective area is π * 0.01905 * 2068 * 7.676 = 950.015 m ² It becomes.

  The measurement unit 14 measures the temperature of the cooling medium at the cooling water outlet 512 from which the cooling medium cooled by the heat exchanger 500 flows out of the heat exchanger 500. For example, the measurement unit 14 receives temperature data from the temperature sensor 301 arranged at the cooling water outlet 512 from which the medium to be cooled flows out of the heat exchanger 500, and stores the received temperature data in a storage unit (for example, a diagram described later). 2 auxiliary storage unit 2015).

  The abnormality determination unit 15 is configured such that the required area calculated by the required area calculation unit 12 is smaller than the effective area calculated by the effective area calculation unit 13 and the temperature of the medium to be cooled measured by the measurement unit 14 is the reception unit. 11, it is determined that the heat exchanger 500 is abnormal.

  When the abnormality determining unit 15 determines that the number is abnormal, the number calculating unit 16 determines the number of heat transfer tubes 521 in which heat exchange has not been performed among the heat transfer tubes 521 based on the difference between the required area and the effective area. Calculate the number. For example, the number calculation unit 16 calculates the blockage rate by the following formula, and calculates the number of heat transfer tubes 521 that have not been subjected to heat exchange based on the calculated blockage rate and the total number of heat transfer tubes 521.

The number calculation unit 16 calculates the blocking rate using the following formula.
Blockage rate = (effective area−required area) /π×0.019×7.676
For example, in the case described above, the effective area is 950.015 m ² and the required area is 865.315 m ² , so the blocking rate = 84.70 / π * 0.019 * 7.676 = 8.92%. . When the number of heat transfer tubes is 2068, the number of heat transfer tubes 521 that have not been subjected to heat exchange = 2068 × 0.0892 = 184.

  FIG. 2 is a block diagram showing a hardware configuration of the heat exchanger performance management apparatus 10 according to an embodiment of the present invention. As shown in FIG. 2, the heat exchanger performance management apparatus 10 includes a CPU (Central Processing Unit) 2011, a memory 2012, an operation unit 2013, a display unit 2014, an auxiliary storage unit 2015, and a device I / F 2016 connected by a bus line 2050. Has been configured.

  The CPU 2011 is a part that controls the heat exchanger performance management apparatus 10 in an integrated manner, and by appropriately reading and executing various programs stored in the memory 2012, the CPU 2011 cooperates with the hardware described above, and relates to the present invention. Various functions are realized. The memory 2012 stores a program that is read and executed as appropriate, and stores various information created by executing the program.

  The operation unit 2013 includes an operation button group for performing various settings and input operations, a determination operation button, and the like. Input information from the operation unit 2013 is processed under the control of the CPU 2011. That is, the user can perform various necessary setting operations or designation operations via the operation unit 2013. The display unit 2014 includes an LCD (Liquid Crystal Display) and an organic EL (Electro Luminescence), and displays various types of information.

  The auxiliary storage unit 2015 is configured by a flash memory or the like, and stores various programs for the heat exchanger performance management device 10 to function and programs for executing the functions of the present invention. Further, the auxiliary storage unit 2015 stores various data such as predetermined values related to heat exchange.

  The device I / F 2016 is an interface for connecting the heat exchanger performance management apparatus 10 and the temperature sensor 301 disposed in the heat exchanger 500 so that temperature data from the temperature sensor 301 can be received.

  FIG. 3 is a flowchart showing the processing contents of the heat exchanger performance management apparatus 10 according to an embodiment of the present invention. This process starts with a start command and ends with the end of the process.

  In step S101, the CPU 2011 (receiving unit 11) receives the inlet temperature of the medium to be cooled. More specifically, the CPU 2011 displays a message for accepting the inlet temperature of the medium to be cooled on the display unit 2014 and stores the input data in the auxiliary storage unit 2015 as the inlet temperature of the medium to be cooled. Thereafter, the CPU 2011 moves the process to step S102.

  In step S102, the CPU 2011 (receiving unit 11) receives the inlet temperature of the cooling medium. More specifically, the CPU 2011 displays a message for accepting the inlet temperature of the cooling medium on the display unit 2014, and stores the input data in the auxiliary storage unit 2015 as the inlet temperature of the cooling medium. Thereafter, the CPU 2011 moves the process to step S103.

  In step S103, the CPU 2011 (receiving unit 11) receives a set temperature for cooling the medium to be cooled. More specifically, the CPU 2011 displays a message for accepting the set temperature on the display unit 2014 and stores the input data in the auxiliary storage unit 2015 as the set temperature. Thereafter, the CPU 2011 moves the process to step S104.

  In step S <b> 104, the CPU 2011 (required area calculation unit 12) calculates a necessary area for cooling the cooling target medium to the set temperature. More specifically, the CPU 2011 calculates the above formula based on the cooling medium inlet temperature, the cooling medium inlet temperature and the set temperature received in steps S101 to S103, and a predetermined value related to heat exchange. To calculate the required area. Thereafter, the CPU 2011 moves the process to step S105.

  In step S105, the CPU 2011 (effective area calculation unit 13) calculates an effective area where heat exchange is performed. More specifically, the CPU 2011 calculates the effective area by the above formula based on the surface area and the number of the heat transfer tubes 521. Thereafter, the CPU 2011 moves the process to step S106.

  In step S106, the CPU 2011 (measurement unit 14) measures the outlet temperature of the medium to be cooled. More specifically, the CPU 2011 receives temperature data from the temperature sensor 301 disposed at the cooling water outlet 512 from which the medium to be cooled flows out of the heat exchanger 500, and stores the received temperature data in the auxiliary storage unit 2015. Let Thereafter, the CPU 2011 moves the process to step S107.

  In step S107, the CPU 2011 (abnormality determination unit 15) determines whether the required area is smaller than the effective area. More specifically, the CPU 2011 determines whether or not the required area calculated in step S104 is smaller than the effective area calculated in step S105. If the determination is YES, the CPU 2011 moves the process to step S108, and if the determination is NO, the CPU 2011 moves the process to step S110.

  In step S108, the CPU 2011 determines whether the outlet temperature of the medium to be cooled is higher than the set temperature. More specifically, the CPU 2011 determines whether or not the outlet temperature of the medium to be cooled measured in step S106 is higher than the set temperature accepted in step S103. If the determination is YES, the CPU 2011 moves the process to step S109, and if the determination is NO, the CPU 2011 moves the process to step S111.

  In step S109, the CPU 2011 (abnormality determination unit 15) notifies that there is an abnormality. More specifically, the CPU 2011 causes the display unit 2014 to display a message indicating that there is an abnormality. Then, the CPU 2011 (number calculation unit 16) calculates the number of heat transfer tubes 521 that have not been subjected to heat exchange, and causes the display unit 2014 to display the number. Thereafter, the CPU 2011 ends the process.

  In step S110, the CPU 2011 (abnormality determination unit 15) notifies that the condition exceeds the performance of the heat exchanger 500. More specifically, the CPU 2011 causes the display unit 2014 to display a message indicating that the condition exceeds the performance of the heat exchanger 500. Thereafter, the CPU 2011 ends the process.

  In step S111, the CPU 2011 (abnormality determination unit 15) notifies that there is no abnormality. More specifically, the CPU 2011 causes the display unit 2014 to display a message indicating that there is no abnormality. Thereafter, the CPU 2011 ends the process.

  FIG. 4 is a diagram illustrating an example of receiving the inlet temperature and the set temperature and an example of a determination display in the heat exchanger performance management apparatus 10 according to an embodiment of the present invention. In the example illustrated in FIG. 4, the inlet temperature of the cooling medium, the inlet temperature of the cooling medium, and the set temperature are input to the inlet temperature input field 201 of the cooling medium, the inlet temperature input field 202 of the cooling medium, and the set temperature input field 203. This is an example of being displayed. The example shown in FIG. 4 is an example showing that the outlet temperature of the medium to be cooled measured by the temperature sensor 301 is displayed in the measured temperature display field 204. The example shown in FIG. 4 is an example showing that the necessary area and effective area calculated by the heat exchanger performance management device 10 are displayed in the necessary area display column 205 and the effective area display column 206. Further, in the example shown in FIG. 4, a message when it is determined that the heat transfer tube 521 of the heat exchanger 500 is not functioning as designed is displayed in the determination column 207, and the blockage rate display column 208 and the clogging number display column are displayed. In this example, the blockage rate and the number of clogs are displayed in 209.

  According to the first embodiment, the heat exchanger performance management device 10 receives the inlet temperature of the medium to be cooled, the inlet temperature of the cooling medium, and the set temperature. Next, the heat exchanger performance management device 10 calculates a necessary area and calculates an effective area. The heat exchanger performance management device 10 measures the outlet temperature of the cooling medium, the calculated required area is smaller than the calculated effective area, and the measured outlet temperature of the cooling medium is higher than the set temperature received. When it is high, it is determined that the heat exchanger 500 is abnormal. Furthermore, if the heat exchanger performance management device 10 determines that the heat exchanger is abnormal, the heat exchanger performance management device 10 determines the number of heat transfer tubes 521 that have not undergone heat exchange out of the heat transfer tubes 521 based on the difference between the required area and the effective area. calculate. Therefore, the heat exchanger performance management device 10 can easily determine whether or not the heat transfer tube 521 of the heat exchanger 500 is functioning as designed.

[Embodiment 2]
FIG. 5 is a functional block diagram showing functions of the second embodiment of the heat exchanger performance management apparatus 10 according to one embodiment of the present invention. FIG. 5 shows that the heat exchanger performance management device 10 adds a cooling medium temperature measuring unit 17 as a cooling medium temperature measuring unit and a cooling medium temperature measurement as a cooling medium temperature measuring unit in addition to the first embodiment of FIG. It is a figure which shows having the part 18. FIG. The temperature sensor 302 and the temperature sensor 303 are connected to the heat exchanger performance management apparatus 10 via the device I / F 2016.

  The to-be-cooled medium temperature measuring unit 17 measures the temperature of the to-be-cooled medium at the inlet where the to-be-cooled medium flows into the heat exchanger 500. For example, the cooling medium temperature measurement unit 17 receives temperature data from the temperature sensor 302 disposed at the cooling water inlet 511 through which the cooling medium flows into the heat exchanger 500, and the received temperature data is stored in the auxiliary storage unit 2015. Remember me. The cooling medium temperature measurement unit 18 measures the temperature of the cooling medium at the cooling water inlet 501 where the cooling medium flows into the heat exchanger 500. For example, the cooling medium temperature measurement unit 18 receives temperature data from the temperature sensor 303 disposed at the cooling water inlet 501 into which the cooling medium flows into the heat exchanger 500, and stores the received temperature data in the auxiliary storage unit 2015. . Then, the heat exchanger performance management device 10 calculates the required area of the heat transfer tube 521 from the measured inlet temperature of the cooling medium, the measured inlet temperature of the cooling medium, and the received set temperature, and calculates the effective area. When the calculated required area is smaller than the calculated effective area and the measured outlet temperature of the medium to be cooled is higher than the accepted set temperature, it is determined that the heat exchanger 500 is abnormal.

  According to the second embodiment, the heat exchanger performance management device 10 measures the inlet temperature of the cooling medium and measures the inlet temperature of the cooling medium. Therefore, the heat exchanger performance management device 10 determines that the heat transfer tube 521 of the heat exchanger 500 is configured according to the measured cooling medium and the inlet temperature of the cooling medium, the received set temperature, and the measured outlet temperature of the cooling medium. It can be more easily determined whether or not it functions as designed.

  As mentioned above, although embodiment of this invention was described, this invention is not restricted to embodiment mentioned above. The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. is not.

DESCRIPTION OF SYMBOLS 10 Heat exchanger performance management apparatus 11 Reception part 12 Required area calculation part 13 Effective area calculation part 14 Measurement part 15 Abnormality determination part 16 Number calculation part 17 Cooling medium temperature measurement part 18 Cooling medium temperature measurement part 301,302,303 Temperature Sensor 500 Heat exchanger 501 Cooling water inlet 502 Cooling water outlet 511 Cooled water inlet 512 Cooled water outlet 521 Heat transfer tube

Claims (4)

In the heat exchanger that cools the cooling medium by performing heat exchange between the cooling medium flowing through the plurality of heat transfer tubes and the cooling medium flowing between the plurality of heat transfer tubes via the heat transfer tubes, the heat A heat exchanger performance management device for managing the performance of the exchanger,
The temperature of the cooled medium at the inlet where the cooled medium flows into the heat exchanger, the temperature of the cooling medium at the inlet where the cooled medium flows into the heat exchanger, and the heat exchange of the cooled medium Receiving means for receiving a set temperature that is a temperature that the vessel cools;
A required area, which is an area of the heat transfer tube necessary for cooling the cooled medium to the set temperature received by the receiving means, a predetermined value related to heat exchange between the cooling medium and the cooled medium; A required area calculating means for calculating based on the temperature of the medium to be cooled and the temperature of the cooling medium received by the receiving means;
An effective area calculating means for calculating an effective area, which is an area of the heat transfer tube in which heat exchange is performed, based on calculation of a surface area and the number of the heat transfer tubes;
Measuring means for measuring the temperature of the cooled medium at an outlet where the cooled medium cooled by the heat exchanger flows out of the heat exchanger;
The required area calculated by the required area calculating unit is smaller than the effective area calculated by the effective area calculating unit, and the temperature of the medium to be cooled measured by the measuring unit is received by the receiving unit. An abnormality determining means for determining that the heat exchanger is abnormal when the temperature is higher than a set temperature;
A heat exchanger performance management device comprising:   The number for calculating the number of heat transfer tubes in which heat exchange has not been performed among the heat transfer tubes based on the difference between the required area and the effective area when the abnormality determination unit determines that there is an abnormality. The heat exchanger performance management device according to claim 1, further comprising a calculation unit. Cooling medium temperature measuring means for measuring the temperature of the cooling medium at an inlet where the cooling medium flows into the heat exchanger;
Cooling medium temperature measuring means for measuring the temperature of the cooling medium at an inlet where the cooling medium flows into the heat exchanger;
The heat exchanger performance management device according to claim 1 or 2, further comprising: In the heat exchanger that cools the cooling medium by performing heat exchange between the cooling medium flowing through the plurality of heat transfer tubes and the cooling medium flowing between the plurality of heat transfer tubes via the heat transfer tubes, the heat A method performed by a heat exchanger performance management device for managing the performance of the exchanger,
The temperature of the cooled medium at the inlet where the cooled medium flows into the heat exchanger, the temperature of the cooling medium at the inlet where the cooled medium flows into the heat exchanger, and the heat exchange of the cooled medium A reception step for receiving a set temperature, which is a temperature at which the vessel cools,
A required area, which is an area of the heat transfer tube necessary for cooling the cooled medium to the set temperature received by the receiving step, a predetermined value related to heat exchange between the cooling medium and the cooled medium; A necessary area calculating step for calculating based on the temperature of the medium to be cooled and the temperature of the cooling medium received by the receiving step;
An effective area calculating step for calculating an effective area, which is an area of the heat transfer tube in which heat exchange is performed, based on a calculation of the surface area and the number of the heat transfer tubes;
A measurement step of measuring a temperature of the cooled medium at an outlet where the cooled medium cooled by the heat exchanger flows out of the heat exchanger;
The required area calculated by the required area calculating step is smaller than the effective area calculated by the effective area calculating step, and the temperature of the medium to be cooled measured by the measuring step is received by the receiving step. Determining that the heat exchanger is abnormal when the temperature is higher than the set temperature;
A method comprising:

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