CN116465456A - Device and method for judging working state of hydrogen cooler of turbogenerator - Google Patents
Device and method for judging working state of hydrogen cooler of turbogenerator Download PDFInfo
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- CN116465456A CN116465456A CN202310417679.3A CN202310417679A CN116465456A CN 116465456 A CN116465456 A CN 116465456A CN 202310417679 A CN202310417679 A CN 202310417679A CN 116465456 A CN116465456 A CN 116465456A
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 247
- 239000001257 hydrogen Substances 0.000 title claims abstract description 236
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 236
- 238000000034 method Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 116
- 238000012546 transfer Methods 0.000 claims abstract description 109
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000002360 preparation method Methods 0.000 claims description 16
- 239000000126 substance Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 4
- 150000002431 hydrogen Chemical class 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- General Physics & Mathematics (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention relates to a working state judging device and a judging method of a hydrogen cooler of a turbogenerator, which are characterized in that temperature and pressure sensors are additionally arranged at a hydrogen inlet and a hydrogen outlet and a water inlet and a water outlet of the hydrogen cooler, temperature and pressure data of the hydrogen cooler are collected, the data are processed by a soldier to obtain heat transfer coefficient, heat transfer material mass loss ratio and heat transfer efficiency data under a healthy operation period, then the heat transfer coefficient, heat transfer material mass loss ratio and heat transfer efficiency under the current state are monitored and compared with the data under the healthy period, the scaling and leakage fault states of the hydrogen cooler are identified, and the problem that the cooling efficiency is reduced to influence the generated energy due to the fact that the hydrogen cooler fault is not found in time is prevented.
Description
Technical Field
The invention relates to a device and a method for judging the working state of a hydrogen cooler of a turbo generator.
Background
At present, most of large-capacity turbo generators adopt a water-hydrogen cooling mode, namely a stator coil is cooled by adopting an internal water cooling mode, a rotor and an iron core are cooled by adopting hydrogen, and the hydrogen is led into the generator during normal operation. The generator hydrogen temperature requirements are very stringent. The higher hydrogen temperature can influence the cooling effect of the generator so as to limit the load of the generator, and the water vapor in the generator is easy to condense when the hydrogen temperature is too low, so that the insulation capability of the iron core and the winding is reduced.
The hydrogen led into the generator is cooled by a hydrogen cooler, and no effective judging method for the cooling effect of the hydrogen cooler exists at present. At present, the temperature of the hydrogen is simply judged to be out of standard only by the relevant measuring points, the operation state of the hydrogen cooler cannot be accurately analyzed to judge and evaluate, and the cooling efficiency is low to almost no cooling capacity when the hydrogen cooling system alarms, so that the cooling effect of the generator is affected. Common faults of the hydrogen cooler have the problems of leakage, scaling and the like. Fouling of hydrogen coolers alone can lead to deterioration of heat transfer performance, increased energy consumption, and a threat to equipment safety. Therefore, accurate determination of the type of hydrogen cooler failure is critical to improving the operational performance of the hydrogen cooler equipment and reducing economic losses.
Disclosure of Invention
Aiming at the situation, the invention aims to overcome the defects of the prior art and provide a device and a method for judging the working state of a hydrogen cooler of a turbogenerator, which can effectively solve the problem of accurately judging the state of the hydrogen cooler.
The technical scheme of the invention is as follows:
the utility model provides a turbo generator hydrogen cooler operating condition discriminating device, including the hydrogen cooler, be provided with into hydrogen temperature sensor and advance hydrogen pressure sensor in the pipeline of hydrogen cooler hydrogen inlet respectively, be provided with out hydrogen temperature sensor and go out hydrogen pressure sensor in the pipeline of hydrogen cooler hydrogen outlet respectively, be provided with into water temperature sensor and water pressure sensor in the pipeline of hydrogen cooler water inlet respectively, be provided with out water temperature sensor and water pressure sensor in the pipeline of hydrogen cooler delivery port respectively, be provided with ambient temperature sensor on the shell of hydrogen cooler, ambient temperature sensor, advance hydrogen pressure sensor, go out hydrogen temperature sensor, go out hydrogen pressure sensor, advance water temperature sensor, advance water pressure sensor, go out water temperature sensor and go out water pressure sensor's output and link to each other with the computer through signal transducer, analog-digital converter in proper order, wherein:
the environment temperature sensor, the hydrogen inlet temperature sensor, the hydrogen outlet temperature sensor, the water inlet temperature sensor and the water outlet temperature sensor are used for collecting temperature data of relevant parts;
the hydrogen inlet pressure sensor, the hydrogen outlet pressure sensor and the water outlet pressure sensor are used for collecting pressure data of relevant parts;
the signal transmitter is used for converting potential difference signals collected and input by the temperature sensors and the pressure sensors into 4-20mA current signals and outputting the 4-20mA current signals to the analog-to-digital converter;
the analog-to-digital converter is used for converting the current signal input by the signal transmitter into a digital signal and outputting the digital signal to the computer;
the computer is used for recognizing the digital signals input by the analog-to-digital converter, calculating the heat transfer coefficient, the mass loss ratio of the heat transfer substance, the heat transfer efficiency, the hydrogen pressure difference and the mass according to a preset formula, and outputting the hydrogen cooler state judgment result.
The method for judging the working state of the hydrogen cooler of the steam turbine generator by adopting the judging device comprises the following steps of:
step one, collecting the following related operation data:
1) Mass M of hydrogen flowing in per hour when the hydrogen cooler is in operation Feeding hydrogen And inflow water mass M Inflow of water And determining the mass M of hydrogen flowing out per hour according to the diameter, the mass density and the flow rate of the inlet pipeline and the outlet pipeline Hydrogen production And effluent mass M Effluent water ；
2) Heat exchange area a (m) 2 )；
3) Specific heat capacities of hydrogen and water are C respectively Hydrogen gas ＝14.3kJ/(kg·K)、C Water and its preparation method ＝4.2kJ/(kg·K)；
4) The hydrogen and the water density are ρ respectively Hydrogen gas ＝0.0899kg/m 3 、ρ Water and its preparation method ＝10 3 kg/m 3 ；
5) Pressure difference delta p of inlet and outlet hydrogen when hydrogen cooler works Hydrogen gas And water inlet and outlet pressure difference delta p Water and its preparation method Unit kpa;
6) The temperature t of the incoming and outgoing hydrogen when the hydrogen cooler works hi 、t ho And inlet and outlet water temperature t wi 、t wo Ambient temperature t 0 ；
Step two, data calculation and processing
Acquiring relevant operation data in a complete period from the initial installation or overhaul maintenance of the hydrogen cooler of the turbogenerator to the next overhaul, calculating heat transfer coefficient, heat transfer material mass loss ratio and heat transfer efficiency data of the hydrogen cooler in a healthy operation period according to the following formula, and establishing a hydrogen cooler state baseline data interval, wherein the heat transfer coefficient interval [ K 1 ，K 2 ]Heat transfer efficiency interval [ eta ] 1 ,η 2 ]Mass loss ratio interval [ delta ] of heat transfer material 1 ,δ 2 ]Hydrogen inlet and outlet pressure difference section [ p ] 1 ,p 2 ]Water inlet and outlet pressure difference interval [ p ] 3 ,p 4 ]；
1) And (3) calculating a heat transfer coefficient:
2) Calculating the mass loss ratio of the heat transfer material:
3) And (3) calculating heat transfer efficiency:
4) Calculating an inlet-outlet differential pressure: Δp Hydrogen gas 、Δp Water and its preparation method
5) And (3) calculating the total mass of the inlet and outlet hydrogen water: m is M 1 ＝M Feeding hydrogen +M Inflow of water ，M 2 ＝M Hydrogen production +M Effluent water 。
Step three, judging the working state of the hydrogen cooler
Calculating the heat transfer coefficient, the mass loss ratio of heat transfer substances and the heat transfer efficiency of the hydrogen cooler in the current state, and judging the working state of the hydrogen cooler according to the following standard:
A. when the heat transfer coefficient is within the heat transfer coefficient interval [ K ] 1 ，K 2 ]When the device is out, judging that the hydrogen cooler is fouled;
B. when the heat transfer efficiency exceeds the heat transfer efficiency interval [ eta ] 1 ,η 2 ]And is larger than eta 2 At the same time, the mass loss ratio of the heat transfer material belongs to the heat transfer efficiency interval [ delta ] 1 ,δ 2 ]When the hydrogen cooler leaks, judging the internal leakage of the hydrogen cooler;
C. when the mass loss ratio of the heat transfer material exceeds the mass loss ratio interval [ delta ] of the heat transfer material 1 ,δ 2 ]And less than delta 1 The heat transfer efficiency value is reduced and exceeds the heat transfer efficiency interval [ eta ] 1 ,η 2 ]And is smaller than eta 1 By combining pressure difference data of water inlet and outlet and hydrogen, external leakage of water or hydrogen can be judged, and the method specifically comprises the following steps: if Δp Hydrogen gas Reduce and exceed the hydrogen inlet and outlet pressure difference interval [ p ] 1 ,p 2 ]The external leakage of the hydrogen system of the hydrogen cooler can be judged; if Δp Water and its preparation method Reduce and exceed the water pressure difference interval [ p ] 3 ,p 4 ]It can be judged that the external leakage of the hydrogen cooler water system occurs.
According to the invention, the temperature and pressure sensors are additionally arranged at the hydrogen inlet and the hydrogen outlet and the water inlet and the water outlet of the hydrogen cooler, the temperature and pressure data are collected, the data are processed to obtain the heat transfer coefficient, the mass loss ratio of the heat transfer substance and the heat transfer efficiency data in a healthy operation period, then the heat transfer coefficient, the mass loss ratio of the heat transfer substance and the heat transfer efficiency in the current state are monitored and compared with the data in a healthy period, the scaling and leakage fault states of the hydrogen cooler are identified, and the problems that the cooling efficiency is reduced to influence the generated energy due to the fact that the fault of the hydrogen cooler is not found in time are prevented, and compared with the prior art, the invention has the following advantages:
1. the burden of monitoring and judging by operators is avoided, and misjudgment caused by human-technology difference can be prevented.
2. The working state result of the hydrogen cooler is obtained by comprehensively judging three dimension values, and the result is accurate and reasonable and can be repeatedly implemented.
3. The device is simple to install, and the working state of the hydrogen cooler can be judged by a corresponding formula calculated by a computer only by connecting a plurality of sensors.
Drawings
FIG. 1 is a schematic view of the structure of the device of the present invention.
Figure 2 is a flow chart of the method of the present invention.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the drawings.
The invention provides a working state judging device of a hydrogen cooler of a turbo generator, which comprises a hydrogen cooler, wherein a hydrogen inlet temperature sensor and a hydrogen inlet pressure sensor are respectively arranged in a pipeline of a hydrogen inlet of the hydrogen cooler, a hydrogen outlet temperature sensor and a hydrogen outlet pressure sensor are respectively arranged in a pipeline of a hydrogen outlet of the hydrogen cooler, a water inlet temperature sensor and a water inlet pressure sensor are respectively arranged in a pipeline of a water inlet of the hydrogen cooler, a water outlet temperature sensor and a water outlet pressure sensor are respectively arranged in a pipeline of a water outlet of the hydrogen cooler, an environment temperature sensor is arranged on a shell of the hydrogen cooler, and the environment temperature sensor, the hydrogen inlet pressure sensor, the hydrogen outlet temperature sensor, the hydrogen outlet pressure sensor, the water inlet temperature sensor and the output end of the water outlet pressure sensor are sequentially connected with a computer through a signal transmitter and an analog-digital converter, wherein:
the environment temperature sensor, the hydrogen inlet temperature sensor, the hydrogen outlet temperature sensor, the water inlet temperature sensor and the water outlet temperature sensor are used for acquiring temperature data of relevant parts, and the II-level precision is achieved;
the hydrogen inlet pressure sensor, the hydrogen outlet pressure sensor and the water outlet pressure sensor are used for collecting pressure data of relevant parts, and the 0.5-level precision is achieved;
the signal transmitter is used for converting potential difference signals collected and input by the temperature sensors and the pressure sensors into 4-20mA current signals and outputting the 4-20mA current signals to the analog-to-digital converter;
the analog-to-digital converter is used for converting the current signal input by the signal transmitter into a digital signal and outputting the digital signal to the computer;
the computer is used for recognizing the digital signals input by the analog-to-digital converter, calculating the heat transfer coefficient, the mass loss ratio of the heat transfer substance, the heat transfer efficiency, the hydrogen pressure difference and the mass according to a preset formula, and outputting the hydrogen cooler state judgment result.
The method for judging the working state of the hydrogen cooler of the steam turbine generator by adopting the judging device comprises the following steps of:
step one, collecting the following related operation data:
1) Mass M of hydrogen flowing in per hour when the hydrogen cooler is in operation Feeding hydrogen And inflow water mass M Inflow of water (the generator monitoring control system has real-time monitoring data of water inlet and water outlet and hydrogen inlet and outlet data), and determines the mass M of hydrogen flowing out per hour according to the diameters, the material densities and the flow rates of the inlet pipeline and the outlet pipeline Hydrogen production And effluent mass M Effluent water ；
2) Heat exchange area a (m) 2 ) The method comprises the steps of carrying out a first treatment on the surface of the (Hydrogen cooler equipment nameplate with heat exchange area data)
3) Specific heat capacities of hydrogen and water are C respectively Hydrogen gas ＝14.3kJ/(kg·K)、C Water and its preparation method ＝4.2kJ/(kg·K)；
4) The hydrogen and the water density are ρ respectively Hydrogen gas ＝0.0899kg/m 3 、ρ Water and its preparation method ＝10 3 kg/m 3 ；
5) Pressure difference delta p of inlet and outlet hydrogen when hydrogen cooler works Hydrogen gas And water inlet and outlet pressure difference delta p Water and its preparation method Unit kpa;
6) The temperature t of the incoming and outgoing hydrogen when the hydrogen cooler works hi 、t ho And inlet and outlet water temperature t wi 、t wo Ambient temperature t 0 The method comprises the steps of carrying out a first treatment on the surface of the Step two, data calculation and processing
Acquiring relevant operation data in a complete period from the initial installation or overhaul maintenance of the hydrogen cooler of the turbogenerator to the next overhaul, calculating heat transfer coefficient, heat transfer material mass loss ratio and heat transfer efficiency data of the hydrogen cooler in a healthy operation period according to the following formula, and establishing a hydrogen cooler state baseline data interval, wherein the heat transfer coefficient interval [ K 1 ，K 2 ]Heat transfer efficiency interval [ eta ] 1 ,η 2 ]Mass loss ratio interval [ delta ] of heat transfer material 1 ,δ 2 ]Hydrogen inlet and outlet pressure difference section [ p ] 1 ,p 2 ]Water inlet and outlet pressure difference interval [ p ] 3 ,p 4 ]；
1) And (3) calculating a heat transfer coefficient:
2) Calculating the mass loss ratio of the heat transfer material:
3) And (3) calculating heat transfer efficiency:
4) Calculating an inlet-outlet differential pressure: Δp Hydrogen gas 、Δp Water and its preparation method
5) And (3) calculating the total mass of the inlet and outlet hydrogen water: m is M 1 ＝M Feeding hydrogen +M Inflow of water ，M 2 ＝M Hydrogen production +M Effluent water 。
Step three, judging the working state of the hydrogen cooler
Calculating the heat transfer coefficient, the mass loss ratio of heat transfer substances and the heat transfer efficiency of the hydrogen cooler in the current state, and judging the working state of the hydrogen cooler according to the following standard:
A. when the hydrogen cooler is scaled, the diameter of the inner wall of the pipeline in the internal heat exchange area is reduced, so that the heat exchange area A is reduced, and the quality difference of the hydrogen inlet and outlet of the hydrogen cooler and the inlet and outlet pressure difference deltap of the hydrogen cooler does not occur at the moment Hydrogen gas 、Δp Water and its preparation method And also remain stable. Calculating K according to the heat transfer coefficient calculation formula when the heat transfer coefficient is in the heat transfer coefficient interval [ K ] 1 ，K 2 ]When the device is out, judging that the hydrogen cooler is fouled; heat transfer coefficient and heat transfer coefficient interval [ K ] 1 ，K 2 ]The larger the deviation, the more severe the fouling;
B. when the hydrogen cooler leaks internally (the hydrogen pressure is larger than the water pressure, and the hydrogen only leaks into the cooling water), the numerical value of the heat transfer efficiency is increased according to the heat transfer efficiency formula, but the water and the hydrogen at the total inlet and outlet of the hydrogen cooler have no loss, but the hydrogen pressure is reduced, and the water pressure is increased. I.e. when the heat transfer efficiency exceeds the heat transfer efficiency interval [. Eta. ] 1 ,η 2 ]And is larger than eta 2 At the same time, the mass loss ratio of the heat transfer material belongs to the heat transfer efficiency interval [ delta ] 1 ,δ 2 ]When the hydrogen cooler leaks, judging the internal leakage of the hydrogen cooler;
C. the mass loss will occur when the leakage occurs, resulting in the total mass of the outlet being smaller than the total mass of the inlet, i.e. when the mass loss ratio of the heat transfer material exceeds the mass loss ratio interval [ delta ] of the heat transfer material 1 ,δ 2 ]And less than delta 1 The heat transfer efficiency value is reduced and exceeds the heat transfer efficiency interval [ eta ] 1 ,η 2 ]And is smaller than eta 1 By combining pressure difference data of water inlet and outlet and hydrogen, external leakage of water or hydrogen can be judged, and the method specifically comprises the following steps: if Δp Hydrogen gas Reduce and exceed the hydrogen inlet and outlet pressure difference interval [ p ] 1 ,p 2 ]The external leakage of the hydrogen system of the hydrogen cooler can be judged; if Δp Water and its preparation method Reduce and exceed the water pressure difference interval [ p ] 3 ,p 4 ]It can be judged that the external leakage of the hydrogen cooler water system occurs.
The invention has good technical effects through practical application, and the application is as follows:
the method for judging the working states of the hydrogen coolers of the turbogenerators is used for respectively calculating the baseline data intervals of the states of the hydrogen coolers.
The method is used for respectively calculating the heat transfer coefficient, the mass loss ratio of the heat transfer substance, the heat transfer efficiency data, the water-hydrogen pressure difference and the total mass of water and hydrogen by selecting the operation data of 3 hydrogen coolers when faults occur, and the results are as follows.
The hydrogen cooler C comprises a heat transfer coefficient 1195.53, a heat transfer material mass loss ratio 0.9542, heat transfer efficiency data 0.9833, a hydrogen inlet and outlet pressure difference of 0.029, a water inlet and outlet pressure difference of 0.036 and total mass 891.9 of water inlet and outlet and hydrogen. The heat transfer efficiency eta, the hydrogen inlet and outlet pressure difference and the water inlet and outlet pressure difference exceed the baseline data interval, and the judgment logic can know that the internal leakage of the hydrogen cooler C occurs according to the working state of the hydrogen cooler. The actual failure of the hydrogen cooler C is also internal leakage, so that the method provided by the invention is accurate in judging the internal leakage failure state of the hydrogen cooler.
The hydrogen cooler D has a heat transfer coefficient 711.53, a heat transfer mass loss ratio 0.9542, heat transfer efficiency data 0.9133, a hydrogen inlet and outlet pressure difference of 0.036, a water inlet and outlet pressure difference of 0.046 and total mass 893.4 of water inlet and outlet and hydrogen. Wherein the heat transfer coefficient K exceeds the baseline data interval, and the others are free of anomalies. According to the judgment logic of the working state of the hydrogen cooler, the scaling of the hydrogen cooler D occurs. The actual failure of the hydrogen cooler D is internal scaling, so that the method provided by the invention is accurate in judging the internal scaling failure state of the hydrogen cooler.
The hydrogen cooler F has a heat transfer coefficient 728.43, a heat transfer material mass loss ratio 0.7563, heat transfer efficiency data 0.6027, a hydrogen inlet and outlet pressure difference of 0.133, a water inlet and outlet pressure difference of 0.021, and total mass 863.4 of water inlet and outlet and hydrogen. Wherein the mass loss ratio of the heat transfer material, the heat transfer efficiency data, the hydrogen inlet and outlet pressure difference, the total mass of the water inlet and outlet and the hydrogen exceeds the baseline data interval, and other materials have no abnormality. The hydrogen cooler F is configured to leak hydrogen gas to the outside as known from the hydrogen cooler operation state determination logic. The actual failure of the hydrogen cooler F is that hydrogen leaks outwards, so that the method provided by the invention is accurate in judging the external leakage state of the hydrogen cooler.
Claims (2)
1. The utility model provides a turbogenerator hydrogen cooler operating condition discriminating device, includes the hydrogen cooler, its characterized in that is provided with into hydrogen temperature sensor and advance hydrogen pressure sensor in the pipeline of hydrogen cooler hydrogen inlet respectively, is provided with out hydrogen temperature sensor and out hydrogen pressure sensor in the pipeline of hydrogen cooler hydrogen outlet respectively, is provided with into water temperature sensor and into water pressure sensor in the pipeline of hydrogen cooler water inlet respectively, is provided with out water temperature sensor and out water pressure sensor in the pipeline of hydrogen cooler delivery port respectively, is provided with ambient temperature sensor on the shell of hydrogen cooler, ambient temperature sensor, advance hydrogen pressure sensor, go out hydrogen temperature sensor, go out hydrogen pressure sensor, into water temperature sensor, advance water pressure sensor, go out water temperature sensor and go out water pressure sensor's output and link to each other with the computer through signal transducer, analog-digital converter in proper order, wherein:
the environment temperature sensor, the hydrogen inlet temperature sensor, the hydrogen outlet temperature sensor, the water inlet temperature sensor and the water outlet temperature sensor are used for collecting temperature data of relevant parts;
the hydrogen inlet pressure sensor, the hydrogen outlet pressure sensor and the water outlet pressure sensor are used for collecting pressure data of relevant parts;
the signal transmitter is used for converting potential difference signals collected and input by the temperature sensors and the pressure sensors into 4-20mA current signals and outputting the 4-20mA current signals to the analog-to-digital converter;
the analog-to-digital converter is used for converting the current signal input by the signal transmitter into a digital signal and outputting the digital signal to the computer;
the computer is used for recognizing the digital signals input by the analog-to-digital converter, calculating the heat transfer coefficient, the mass loss ratio of the heat transfer substance, the heat transfer efficiency, the hydrogen pressure difference and the mass according to a preset formula, and outputting the hydrogen cooler state judgment result.
2. A method for discriminating the operating state of a hydrogen cooler of a turbo generator using the discriminating apparatus of claim 1, comprising the steps of:
step one, collecting the following related operation data:
1) Mass M of hydrogen flowing in per hour when the hydrogen cooler is in operation Feeding hydrogen And inflow water mass M Inflow of water And determining the mass M of hydrogen flowing out per hour according to the diameter, the mass density and the flow rate of the inlet pipeline and the outlet pipeline Hydrogen production And effluent mass M Effluent water ；
2) Heat exchange area a (m) 2 )；
3) Specific heat capacities of hydrogen and water are C respectively Hydrogen gas ＝14.3kJ/(kg·K)、C Water and its preparation method ＝4.2kJ/(kg·K)；
4) The hydrogen and the water density are ρ respectively Hydrogen gas ＝0.0899kg/m 3 、ρ Water and its preparation method ＝10 3 kg/m 3 ；
5) Pressure difference delta p of inlet and outlet hydrogen when hydrogen cooler works Hydrogen gas And water inlet and outlet pressure difference delta p Water and its preparation method Unit kpa;
6) The temperature t of the incoming and outgoing hydrogen when the hydrogen cooler works hi 、t ho And inlet and outlet water temperature t wi 、t wo Ambient temperature t 0 ；
Step two, data calculation and processing
Acquiring relevant operation data in a complete period from the initial installation or overhaul maintenance of the hydrogen cooler of the turbogenerator to the next overhaul, calculating heat transfer coefficient, heat transfer material mass loss ratio and heat transfer efficiency data of the hydrogen cooler in a healthy operation period according to the following formula, and establishing a hydrogen cooler state baseline data interval, wherein the heat transfer coefficient interval [ K 1 ，K 2 ]Heat transfer efficiency interval [ eta ] 1 ,η 2 ]Mass loss of heat transfer materialConsumption ratio interval [ delta ] 1 ,δ 2 ]Hydrogen inlet and outlet pressure difference section [ p ] 1 ,p 2 ]Water inlet and outlet pressure difference interval [ p ] 3 ,p 4 ]；
1) And (3) calculating a heat transfer coefficient:
2) Calculating the mass loss ratio of the heat transfer material:
3) And (3) calculating heat transfer efficiency:
4) Calculating an inlet-outlet differential pressure: Δp Hydrogen gas 、Δp Water and its preparation method
5) And (3) calculating the total mass of the inlet and outlet hydrogen water: m is M 1 ＝M Feeding hydrogen +M Inflow of water ，M 2 ＝M Hydrogen production +M Effluent water 。
Step three, judging the working state of the hydrogen cooler
Calculating the heat transfer coefficient, the mass loss ratio of heat transfer substances and the heat transfer efficiency of the hydrogen cooler in the current state, and judging the working state of the hydrogen cooler according to the following standard:
A. when the heat transfer coefficient is within the heat transfer coefficient interval [ K ] 1 ，K 2 ]When the device is out, judging that the hydrogen cooler is fouled;
B. when the heat transfer efficiency exceeds the heat transfer efficiency interval [ eta ] 1 ,η 2 ]And is larger than eta 2 At the same time, the mass loss ratio of the heat transfer material belongs to the heat transfer efficiency interval [ delta ] 1 ,δ 2 ]When the hydrogen cooler leaks, judging the internal leakage of the hydrogen cooler;
C. when the mass loss ratio of the heat transfer material exceeds the mass loss ratio interval [ delta ] of the heat transfer material 1 ,δ 2 ]And less than delta 1 The heat transfer efficiency value is reduced and exceeds the heat transfer efficiency interval [ eta ] 1 ,η 2 ]And is smaller than eta 1 By combining the pressure difference data of the water inlet and outlet and the hydrogen, the external leakage of the water or the hydrogen can be judgedThe method specifically comprises the following steps: if Δp Hydrogen gas Reduce and exceed the hydrogen inlet and outlet pressure difference interval [ p ] 1 ,p 2 ]The external leakage of the hydrogen system of the hydrogen cooler can be judged; if Δp Water and its preparation method Reduce and exceed the water pressure difference interval [ p ] 3 ,p 4 ]It can be judged that the external leakage of the hydrogen cooler water system occurs.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310417679.3A CN116465456A (en) | 2023-04-17 | 2023-04-17 | Device and method for judging working state of hydrogen cooler of turbogenerator |
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| CN202310417679.3A CN116465456A (en) | 2023-04-17 | 2023-04-17 | Device and method for judging working state of hydrogen cooler of turbogenerator |
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