CN115468789A - Method for correcting power consumption of seawater desalination system in unit overall performance test - Google Patents

Method for correcting power consumption of seawater desalination system in unit overall performance test Download PDF

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CN115468789A
CN115468789A CN202211122885.3A CN202211122885A CN115468789A CN 115468789 A CN115468789 A CN 115468789A CN 202211122885 A CN202211122885 A CN 202211122885A CN 115468789 A CN115468789 A CN 115468789A
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seawater desalination
desalination system
power consumption
unit
theoretical
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薛志恒
贾晨光
王慧青
白睿博
何涛
杨众乔
陈会勇
何欣欣
赵杰
王伟锋
吴涛
赵永坚
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Xian Thermal Power Research Institute Co Ltd
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Xian Thermal Power Research Institute Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/08—Seawater, e.g. for desalination

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Abstract

The invention discloses a method for correcting power consumption of a seawater desalination system in a unit overall performance test, which comprises the following steps: A. before the test, the power design values of the seawater desalination equipment are listed into a list, and the design running quantity is counted; B. confirming the water production capacity of the seawater desalination system; C. obtaining a theoretical ton water power consumption value of the seawater desalination system; D. obtaining the theoretical total water consumption of fresh water users of the whole plant under the test operation condition; E. obtaining a theoretical power consumption value of the seawater desalination system of the unit under the test operation condition; F. during the test, all equipment of the seawater desalination system is closed, so that the seawater desalination system is ensured not to consume power; G. and B, obtaining the theoretical power consumption value of the seawater desalination system under the test operation condition according to the steps A to F, wherein the theoretical power consumption value can reflect the power consumption value of the system under the design condition. By using the correction method provided by the method, the factors influencing the power consumption of the demineralized water system can be corrected to the design conditions, and the comparison between the overall performance test result of the thermal power generating unit and the design guaranteed value is facilitated.

Description

Method for correcting power consumption of seawater desalination system in unit overall performance test
Technical Field
The invention belongs to the field of thermal performance tests of seawater cooling units, and particularly relates to a method for correcting power consumption of a seawater desalination system in a unit overall performance test.
Background
In the middle of the thermoelectric unit power plant equipment, the power consumption of the auxiliary equipment of the power plant is an extremely important guarantee index in the thermoelectric unit performance examination test, and has direct influence on the overall performance test result of the thermoelectric unit. The method is not only an important component of the unit power supply coal consumption, but also an important index reflecting the unit auxiliary equipment power consumption. In the overall performance test of the thermoelectric unit, many auxiliary equipment and systems are mostly composed of a large number of low-power equipment due to complex structures, and the power consumption of the auxiliary equipment and the systems cannot be sufficiently counted and measured in actual engineering projects.
In the thermoelectric power unit cooled by seawater, the seawater desalination system is used as a main auxiliary system of the unit, and the equipment composition is very complicated, most of the equipment is low-power equipment, and the equipment wiring is also very complicated, so that the actual power consumption of the thermoelectric power unit cannot be effectively and directly measured in an actual engineering project.
In summary, a method for correcting the power consumption of the seawater desalination system in the plant power consumption calculation is needed to make the power consumption of the seawater desalination system in the overall performance test of the thermoelectric unit closer to the actual power consumption, so that the overall performance test result of the thermoelectric unit is more accurate.
Disclosure of Invention
The invention aims to provide a method for correcting power consumption of a seawater desalination system in a unit overall performance test. In the integral performance test of the seawater cooling unit, the method provided by the invention can correct the power consumption of the seawater desalination system to the corresponding design condition.
In order to realize the purpose, the invention adopts the following technical scheme to realize the purpose:
a method for correcting power consumption of a seawater desalination system in a unit overall performance test comprises the following steps:
A. before the unit overall performance test, listing the power design values of all equipment of the seawater desalination system into a list through design data and an installation drawing, counting the design operation number of different equipment, and entering the step B;
B. before the unit overall performance test, obtaining the water production capacity of the seawater desalination system through design data, and entering a step C;
C. calculating the sum of theoretical electric power of all equipment of the seawater desalination system, and entering a step D;
D. calculating a theoretical ton water power consumption value of the seawater desalination system, and entering the step E;
E. before the unit overall performance test, the total water consumption of fresh water users of the whole plant under the test operation condition is obtained through a water balance diagram, and the step F is carried out;
F. c, calculating a theoretical power consumption value of the seawater desalination system under the test operation condition by the unit, and entering the step G;
G. during the integral performance test of the unit, all equipment of the seawater desalination system is closed, during the test, the seawater desalination system is ensured not to produce water, the seawater desalination system does not consume power, and the step H is carried out;
H. and (4) performing unit overall performance tests according to the steps A to G, wherein the calculated theoretical power consumption value of the seawater desalination system can reflect the power consumption value of the system under the design condition.
The further improvement of the invention is that in the step A, the power design value of each device of the seawater desalination system strictly corresponds to the unit overall performance test working condition, and the power design values of partial variable power devices or variable frequency devices may be different under different test working conditions.
The invention has the further improvement that in the step B, the water production capacity of the seawater desalination system is the water production amount per hour when the seawater desalination system operates under the rated power or normal operation condition.
The further improvement of the invention is that in the step C, the sum of theoretical electric powers of all equipment of the seawater desalination system is calculated according to the formula (1) to obtain:
P desalination ＝∑P i ×N i (1)
wherein, P desalination The unit is the sum of theoretical electric power of all equipment of the seawater desalination system and is kW; p i The unit is kW for the power design value of each device of the seawater desalination system; n is a radical of i The unit of the design operation quantity of each device of the seawater desalination system is one.
In step D, the theoretical ton water power consumption value of the seawater desalination system is calculated according to the formula (2) to obtain:
Figure BDA0003847883050000031
wherein E is desalination The unit is a theoretical ton water power consumption value of a seawater desalination system and is (kW.h)/t; f capacity Is the water production capacity of the seawater desalination system, and the unit is t.
The invention is further improved in that in the step E, the total water consumption of the whole plant fresh water users under the test operation condition is the sum of the theoretical water consumption of the whole plant equipment under the test operation condition.
The further improvement of the invention is that in the step F, the theoretical power consumption value of the seawater desalination system of the unit under the test operation condition is calculated according to the formula (3) to obtain:
P desalination ＝E desalination ×F total (3)
wherein, P desalination The unit is a theoretical power consumption value of the seawater desalination system under a test operation condition, and the unit is kW; f total The unit is t/h, and the total water consumption of the fresh water users of the whole plant is the unit under the test operation condition.
In step G, if some of the devices cannot stop operating, the power consumption of the devices is measured or corrected by a design value, and the system power consumption is corrected to a state where the operation is stopped, that is, a state where the power consumption is zero.
The invention has at least the following beneficial technical effects:
in the integral performance test of the seawater cooling unit, the correction method provided by the method can be used for correcting the factors influencing the power consumption of the seawater desalination system to the design conditions, so that the obtained power consumption value of the seawater desalination system can reflect the power consumption under the design conditions, and the comparison of the integral performance test result of the seawater cooling unit and the design guaranteed value is facilitated.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in the flow chart of the attached figure 1, the method for correcting the power consumption of the seawater desalination system in the unit overall performance test provided by the invention comprises the following steps:
A. before the unit overall performance test, the power design values of all equipment of the seawater desalination system are listed into a list through design data and an installation drawing, and the design operation number of different equipment is counted. Entering the step B;
B. before the unit overall performance test, the water production capacity of the seawater desalination system, namely the water production amount per hour when the seawater desalination system operates under the rated power, is obtained through design data. Entering the step C;
C. the sum of theoretical electric powers of all equipment of the seawater desalination system is calculated according to a formula (1) to obtain:
P desalination ＝∑P i ×N i (1)
wherein, P desalination The unit is the sum of theoretical electric power of all equipment of the seawater desalination system, and is kW; p i The unit is kW which is the power design value of each device of the seawater desalination system; n is a radical of i The unit of the design operation quantity of each device of the seawater desalination system is one. Entering the step D;
D. the theoretical ton water power consumption value of the seawater desalination system is calculated according to the formula (2) to obtain:
Figure BDA0003847883050000051
wherein E is desalination The unit is kWh/t which is the theoretical ton water power consumption value of the seawater desalination system; f capacity Is the water production capacity of the seawater desalination system, and the unit is t. Entering the step E;
E. before the unit overall performance test, the total water consumption of the fresh water users of the whole plant under the test operation condition is obtained through the water balance diagram, namely, the theoretical water consumption of the equipment of the whole plant under the test operation condition. Entering the step F;
F. the theoretical power consumption value of the seawater desalination system of the unit under the test operation condition is calculated according to the formula (3) to obtain:
P desalination ＝E desalination ×F total (3)
wherein, P desalination The unit is a theoretical power consumption value of the seawater desalination system under a test operation condition, and the unit is kW; f total The unit is t/h, and the total water consumption of the fresh water users of the whole plant is the unit under the test operation condition. Entering the step G;
G. during the test of the integral performance of the unit, all equipment of the seawater desalination system is closed, and during the test, the seawater desalination system is ensured not to produce water and is not power-consumed. Entering the step G;
H. performing unit integral performance test according to the steps A to G, and calculating the theoretical power consumption value P of the seawater desalination system desalination The power consumption value of the system under the design condition can be reflected. The power consumption correction calculation example of the seawater desalination system of a certain seawater cooling unit project is as follows:
TABLE 1 example of calculation for power consumption correction of seawater desalination system
Figure BDA0003847883050000061
As can be seen from Table 1, in the example, the theoretical power consumption value of the seawater desalination system is 1161.589kW, the actual measurement total auxiliary machine power consumption value of the unit is 56950.7kW, 1161.589kW is added to the total plant power consumption in the later performance test calculation, and the total auxiliary machine power consumption value after the power consumption correction of the seawater desalination system is 58112.3kW in the overall performance test is obtained through calculation.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (8)

1. A method for correcting the power consumption of a seawater desalination system in a unit overall performance test is characterized by comprising the following steps:
A. before the unit overall performance test, listing the power design values of all equipment of the seawater desalination system into a list through design data and an installation drawing, counting the design operation number of different equipment, and entering the step B;
B. before the unit overall performance test, obtaining the water production capacity of the seawater desalination system through design data, and entering the step C;
C. calculating the sum of theoretical electric powers of all equipment of the seawater desalination system, and entering the step D;
D. calculating a theoretical ton water power consumption value of the seawater desalination system, and entering the step E;
E. before the unit overall performance test, the total water consumption of the fresh water users of the whole plant under the test operation condition is obtained through a water balance diagram, and the step F is carried out;
F. c, calculating a theoretical power consumption value of the seawater desalination system under the test operation condition by the unit, and entering the step G;
G. during the unit integral performance test, all equipment of the seawater desalination system is closed, during the test, the seawater desalination system is ensured not to produce water, the seawater desalination system does not consume power, and the step H is carried out;
H. and (D) performing unit overall performance tests according to the steps A to G, wherein the calculated theoretical power consumption value of the seawater desalination system can reflect the power consumption value of the system under the design condition.
2. The method for correcting the power consumption of the seawater desalination system in the unit overall performance test according to claim 1, wherein in the step a, the power design values of each device of the seawater desalination system strictly correspond to the unit overall performance test working conditions, and the power design values of part of variable power devices or frequency conversion devices may be different under different test working conditions.
3. The method for correcting the power consumption of the seawater desalination system in the unit overall performance test according to claim 2, wherein in the step B, the water production capacity of the seawater desalination system is the water production amount per hour when the seawater desalination system operates at rated power or under normal operation conditions.
4. The method for correcting the power consumption of the seawater desalination system in the unit overall performance test as claimed in claim 3, wherein in the step C, the sum of theoretical electric powers of all equipment of the seawater desalination system is calculated according to the formula (1):
P desalination ＝∑P i ×N i (1)
wherein, P desalination The unit is the sum of theoretical electric power of all equipment of the seawater desalination system and is kW; p i The unit is kW for the power design value of each device of the seawater desalination system; n is a radical of i The unit of the design operation quantity of each device of the seawater desalination system is one.
5. The method for correcting the power consumption of the seawater desalination system in the unit overall performance test as claimed in claim 4, wherein in the step D, the theoretical ton water power consumption value of the seawater desalination system is calculated according to the formula (2):
Figure FDA0003847883040000021
wherein E is desalination The unit is a theoretical ton water power consumption value of a seawater desalination system and is (kW.h)/t; f capacity Is the water production capacity of the seawater desalination system, and the unit is t.
6. The method for correcting the electricity consumption of the seawater desalination system in the unit overall performance test as claimed in claim 5, wherein in the step E, the total water consumption of the fresh water users of the whole plant under the test operation condition is the sum of the theoretical water consumption of the equipment of the whole plant under the test operation condition.
7. The method for correcting the power consumption of the seawater desalination system in the unit overall performance test as claimed in claim 6, wherein in the step F, the theoretical power consumption value of the seawater desalination system of the unit under the test operation condition is calculated according to the formula (3) to obtain:
P desalination ＝E desalination ×F total (3)
wherein, P desalination The unit is a theoretical power consumption value of the seawater desalination system under a test operation condition, and the unit is kW; f total The unit is t/h, and the total water consumption of the fresh water users of the whole plant is the unit under the test operation condition.
8. The method as claimed in claim 7, wherein in step G, if some of the devices cannot stop operating, the power consumption of the devices is measured or corrected by a design value, and the power consumption of the system is corrected to a state of stopping operation, that is, a state of zero power consumption.
CN202211122885.3A 2022-09-15 2022-09-15 Method for correcting power consumption of seawater desalination system in unit overall performance test Pending CN115468789A (en)

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