CN110486264B - Energy-saving monitoring method for infusion pipe network - Google Patents

Energy-saving monitoring method for infusion pipe network Download PDF

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CN110486264B
CN110486264B CN201910673372.3A CN201910673372A CN110486264B CN 110486264 B CN110486264 B CN 110486264B CN 201910673372 A CN201910673372 A CN 201910673372A CN 110486264 B CN110486264 B CN 110486264B
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motor
pump
power
calculating
load
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CN110486264A (en
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邵心怡
马永春
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Jiaxing Aoyou Energy Conservation Evaluation Service Co ltd
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Jiaxing Aoyou Energy Conservation Evaluation Service Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B51/00—Testing machines, pumps, or pumping installations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/34—Testing dynamo-electric machines
    • G01R31/343—Testing dynamo-electric machines in operation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/32—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by dynamic converters
    • H02M5/34—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by dynamic converters using mechanical contact-making and -breaking parts

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The invention discloses an energy-saving monitoring method for a transfusion pipe network, relates to the field of energy monitoring, and aims to solve the problem, and the technical scheme is as follows: the method comprises the following steps: s2, summarizing and calculating, wherein the summarizing and calculating comprises S21, calculating the input power of the motor according to the circuit parameters of the pump motor, and calculating the load rate of the motor according to the input power and the delivery parameters of the pump motor; s22, calculating the output power of the pump according to the parameters output by the flow monitoring device and the pressure monitoring device and the height difference of the hydraulic pressure meters of the input port and the output port of the pump; s3, analyzing and processing, including S31, comparing the load rate of the motor with the comprehensive economic load rate of the motor and the design expected load rate to calculate a load difference value; and S32, comparing the output power of the pump obtained by calculation in the S22 with the rated power of the pump to calculate a power difference value. The energy-saving monitoring method for the infusion pipe network can be used for monitoring the energy consumption of the conveying system by a user so as to adjust the running state of the conveying system, save energy and reduce the production and use cost.

Description

Energy-saving monitoring method for infusion pipe network
Technical Field
The invention relates to the field of energy monitoring, in particular to an energy-saving monitoring method for a transfusion pipe network.
Background
At present, pumps and liquid delivery systems are widely used in both large buildings and industrial fields. At the beginning of the design of the conveying system, because the environment influence, the equipment resistance and the like are difficult to be finely calculated, a large margin is left at the beginning of the system design, so that the constructed and formed system has large energy consumption waste during actual operation, the industrial cost is increased, and the like.
The patent with the publication number of CN208269970U discloses an energy-saving on-line monitoring system, which comprises a controller, an analog input module, a current sensor, a pressure sensor, a flow sensor, a rotation speed sensor and an air speed sensor, wherein the current sensor, the pressure sensor, the flow sensor, the rotation speed sensor and the air speed sensor are all connected with the controller through the analog input module, the controller monitors and analyzes the working energy consumption of a water pump according to signals detected by the current sensor, the pressure sensor and the flow sensor, and the controller monitors and analyzes the working energy consumption of a fan according to signals detected by the current sensor, the rotation speed sensor and the air speed sensor.
The technical scheme can be used for monitoring the energy consumption of the conveying system, and meanwhile, the invention provides a new scheme for solving the problem.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an energy-saving monitoring method for a transfusion pipe network, which can be used for monitoring the energy consumption of a conveying system by a user so as to adjust the running state of the conveying system, save energy and reduce the production and use cost.
The technical purpose of the invention is realized by the following technical scheme: an energy-saving monitoring method for a transfusion pipe network comprises the following steps:
s1, acquiring data, wherein the data acquisition comprises S11, installing an electric energy monitoring device to a circuit of a pump motor, and detecting and outputting circuit parameters; s12, respectively installing flow monitoring devices to the input port and the output port of the pump and the output ports of the pipe network, and detecting and outputting the flow velocity of the liquid; s13, respectively installing a hydraulic gauge to an input port and an output port of the pump, and detecting and outputting the hydraulic pressure in the pipe;
s2, summarizing and calculating, wherein the summarizing and calculating comprises S21, calculating the input power of the motor according to the circuit parameters of the pump motor, and calculating the load rate of the motor according to the input power and the delivery parameters of the pump motor; s22, calculating the output power of the pump according to the parameters output by the flow monitoring device and the pressure monitoring device and the height difference of the hydraulic pressure meters of the input port and the output port of the pump;
s3, analyzing and processing, including S31, comparing the load rate of the motor with the comprehensive economic load rate of the motor and the design expected load rate to calculate a load difference value; and S32, comparing the output power of the pump obtained by calculation in the S22 with the rated power of the pump to calculate a power difference value.
By adopting the technical scheme, a worker can calculate the load difference of the motor and the output power difference of the pump, judge whether the working states of the motor and the pump are proper or not according to the difference, and realize energy consumption monitoring on the infusion system; meanwhile, the calculation result can be used for the reference of the working personnel, so that the subsequent energy-saving adjustment of the infusion system is facilitated.
The invention is further configured to: the electric energy monitoring device comprises an electric energy analyzer or a motor control cabinet, and the flow monitoring device comprises an ultrasonic flowmeter.
By adopting the technical scheme, the voltage, the current and the power factor of the motor can be detected by using the electric energy analyzer; the ultrasonic flowmeter can be used for relatively conveniently acquiring liquid flow velocity data under the condition of not damaging a pipeline.
The invention is further configured to: and step S21, calculating the input power of the motor by using the formula P ═ U · I.
The invention is further configured to: s21, further comprising the step of
Figure BDA0002142434960000031
Calculating the load factor, P, of the motor2For input of power to the motor, PNIs the rated power of the motor.
The invention is further configured to: s31, further comprising the step of adopting a formula III
Figure BDA0002142434960000032
Calculating the load rate, delta P, of the motor with the highest comprehensive efficiency0For no-load active loss, Q, of the motor0For no-load reactive power of the motor, KQFor the reactive economic equivalence of the motor, QNFor reactive power, Δ P, at rated load of the machineNThe active loss of the rated load of the motor.
The invention is further configured to: s22, further comprising adopting a formula of four
Figure BDA0002142434960000033
Figure BDA0002142434960000034
Calculating the output power of the pump, wherein rho is the density of the liquid, g is the gravity acceleration, P2 is the pressure value of the output port of the pump, P1 is the pressure value of the input port of the pump, and Z is2For the delivery outlet of the pump, height of pressure gauge, Z1Is the height of the input pressure gauge of the pump, and Q is the actual displacement of the pump.
The invention is further configured to: the system is characterized by further comprising S4 and a voltage regulating device, wherein the voltage regulating device comprises a transformer L, the transformer L comprises a primary side L1 and a plurality of secondary sides L2, the plurality of secondary sides L2 are mutually connected in series to form a voltage regulating unit T1, and a pump motor is connected in series with the voltage regulating unit T1; and S5, voltage regulation, wherein the voltage regulation comprises the steps of detecting the actual voltage of an output power grid by using the electric energy monitoring device, and regulating the number of the motor series secondary sides L2 for the pump according to the actual voltage of the power grid.
By adopting the technical scheme, the voltage can be regulated by regulating the number of the secondary sides L2 of the series transformer L of the motor for the pump when the voltage fluctuation of the power grid cannot meet the normal requirement of the motor, so that the normal use effect of the motor is ensured, and the useless energy consumption is reduced.
The invention is further configured to: the pump motor is connected in series with a single-pole multi-throw switch K, the fixed end of the single-pole multi-throw switch K is coupled to the pump motor, and a plurality of movable ends of the single-pole multi-throw switch K are coupled to each secondary side L2 respectively.
Through adopting above-mentioned technical scheme, the staff can operate single-pole multi-throw switch K wants to the convenient motor voltage control for completion pump to the result of use is better.
In conclusion, the invention has the following beneficial effects: the working personnel can calculate the load difference of the motor and the output power difference of the pump, judge whether the working states of the motor and the pump are proper or not according to the difference, and realize the energy consumption monitoring of the infusion system; meanwhile, the calculation result can be used for the reference of the working personnel, so that the subsequent energy-saving adjustment of the infusion system is facilitated.
Drawings
FIG. 1 is a schematic flow diagram of the present invention;
fig. 2 is a schematic diagram of the voltage regulator, the motor and the connection of the power grid according to the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
The infusion pipe network energy-saving monitoring method, referring to fig. 1, comprises the following steps:
s1, acquiring data, wherein the data acquisition comprises S11, installing an electric energy monitoring device to a circuit of a pump motor, and detecting and outputting circuit parameters; s12, respectively installing flow monitoring devices to the input port and the output port of the pump and the output ports of the pipe network, and detecting and outputting the flow velocity of the liquid; s13, respectively installing a hydraulic gauge to an input port and an output port of the pump, and detecting and outputting the hydraulic pressure in the pipe;
s2, summarizing and calculating, wherein the summarizing and calculating comprises S21, calculating the input power of the motor according to the circuit parameters of the pump motor, and calculating the load rate of the motor according to the input power and the delivery parameters of the pump motor; s22, calculating the output power of the pump according to the parameters output by the flow monitoring device and the pressure monitoring device and the height difference of the hydraulic pressure meters of the input port and the output port of the pump;
s3, analyzing and processing, including S31, comparing the load rate of the motor with the comprehensive economic load rate of the motor and the design expected load rate to calculate the difference value of the motor; and S32, comparing the output power of the pump obtained by calculation in the S22 with the rated power of the pump to calculate a power difference value.
Wherein the power monitoring device can select a power analyzer, for example: the HSDZC-B electric energy comprehensive tester or the motor control cabinet is characterized in that the motor control cabinet is configured according to a pump selected by the conveying system; the electric energy monitoring device is coupled to a power supply loop of the pump motor, is used for detecting the voltage, the current, the power factor and the like of the pump motor, and is displayed on a display panel of the machine body. The flow monitoring device comprises an ultrasonic flowmeter, wherein a transducer of the ultrasonic flowmeter is fixed on the infusion pipeline in a binding or bonding mode and is used for detecting the liquid flow velocity of the input port and the output port of the pump and the liquid flow velocity of each output port of the pipe network.
After the acquisition devices are correctly installed, the acquisition devices are used for respectively acquiring data and then calculating. The input power of the motor is P, and the formula I is calculated by adopting the formula I, namely U.I; u is the current measured motor voltage and I is the current motor current. After calculating the input power of the motor, the worker can calculate the load factor beta of the motor and adopt a formula II
Figure BDA0002142434960000051
Calculation of P2For input of power to the motor, PNIs the rated power of the motor.
After the load rate of the motor is calculated, a worker can compare the comprehensive economic load rate of the motor with the designed expected load rate to judge whether the current use state of the motor is suitable or not, or whether more energy consumption waste exists or not.
The comprehensive economic load rate of the motor can be determined by a formula III
Figure BDA0002142434960000052
Is calculated, whereincmThe load rate is the load rate when the comprehensive efficiency of the motor is the highest; delta P0The motor no-load active loss can be obtained through motor delivery parameters, and can also be calculated through an electric energy comprehensive analyzer by no-load test; q0For no-load reactive power of the motor by
Figure BDA0002142434960000053
Calculating; kQAnd obtaining the reactive economic equivalent of the motor from a standard value range value according to the wiring condition, for example: when the motor is directly connected with a generator bus or directly connected with a bus which is subjected to reactive compensation, KQTaking 0.02-0.04; qNFor reactive power, Δ P, at rated load of the machineNActive losses at rated load of the machine, by
Figure BDA0002142434960000054
PN is the rated power, eta, of the motorNThe rated efficiency of the motor can be determined by the delivery parameters of the motor.
Besides comparing and calculating each load rate of the motor and judging the energy consumption condition, the invention also calculates the output power of the pump, so as to further assist in judging the energy consumption state and judging whether the pump is overloaded for use by comparing the output power with the rated power of the pump or the expected output power during design. Output power of the pump is PUWhich is represented by the formula four
Figure BDA0002142434960000061
Calculating the output power of the pump, wherein rho is the density of the liquid, g is the gravity acceleration, P2 is the pressure value of the output port of the pump, P1 is the pressure value of the input port of the pump, and Z is2For the delivery outlet of the pump, height of pressure gauge, Z1Is the height of the input pressure gauge of the pump, and Q is the actual displacement of the pump.
Referring to fig. 2, because the grid voltage has certain fluctuation due to the influence of the environmental power consumption, especially in the area with high power consumption in the factory, the grid voltage has a low valley in the peak period of power consumption, which results in the voltage not meeting the normal operation requirements of the equipment such as the pump motor, and the like, and causes the energy consumption waste, the invention further comprises S4, which sets the voltage regulating device, wherein the voltage regulating device comprises a transformer L, the transformer L comprises a primary L1 and a plurality of secondary L2, the plurality of secondary L2 are connected in series with each other to form a voltage regulating unit T1, and the pump motor is connected in series with the voltage regulating unit T1; still include S5, the pressure regulating, it includes utilizes the actual voltage of electric energy monitoring devices detection output electric wire netting, adjusts the quantity of motor series connection secondary L2 for the pump according to the actual voltage of electric wire netting.
In order to conveniently adjust the number of the pump motor series secondary sides L2, a single-pole multi-throw switch K is arranged; the fixed end of the single-pole multi-throw switch K is coupled to the motor, and a plurality of moving ends of the single-pole multi-throw switch K are respectively connected with the secondary sides L2. So that a user can adjust the voltage of the motor by operating the stationary terminal of the single-pole multi-throw switch K.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims (3)

1. An energy-saving monitoring method for a transfusion pipe network is characterized by comprising the following steps:
s1, acquiring data, wherein the data acquisition comprises S11, installing an electric energy monitoring device to a circuit of a pump motor, and detecting and outputting circuit parameters; s12, respectively installing flow monitoring devices to the input port and the output port of the pump and the output ports of the pipe network, and detecting and outputting the flow velocity of the liquid; s13, respectively installing a hydraulic gauge to an input port and an output port of the pump, and detecting and outputting the hydraulic pressure in the pipe;
s2, summarizing and calculating, wherein the summarizing and calculating comprises S21, calculating the input power of the motor according to the circuit parameters of the pump motor, and calculating the load rate of the motor according to the input power and the delivery parameters of the pump motor; s22, calculating the output power of the pump according to the parameters output by the flow monitoring device and the pressure monitoring device and the height difference of the hydraulic pressure meters of the input port and the output port of the pump;
s3, analyzing and processing, including S31, comparing the load rate of the motor with the comprehensive economic load rate of the motor and the design expected load rate to calculate a load difference value; s32, comparing the output power of the pump obtained by calculation in the step S22 with the rated power of the pump to calculate a power difference value;
the system is characterized by further comprising S4 and a voltage regulating device, wherein the voltage regulating device comprises a transformer L, the transformer L comprises a primary side L1 and a plurality of secondary sides L2, the plurality of secondary sides L2 are mutually connected in series to form a voltage regulating unit T1, and a pump motor is connected in series with the voltage regulating unit T1; the method also comprises S5, voltage regulation, wherein the voltage regulation comprises the steps of detecting the actual voltage of an output power grid by using the electric energy monitoring device, and regulating the number of the motor series secondary sides L2 for the pump according to the actual voltage of the power grid;
the step S21 further comprises the step of calculating the input power of the motor by adopting a formula I, namely P-U-I;
s21, further comprising according to the formula
Figure FDA0003062536460000011
Calculating the load factor, P, of the motor2For input of power to the motor, PNThe rated power of the motor;
s31, further comprising the step of adopting a formula III
Figure FDA0003062536460000012
Calculating the load rate, delta P, of the motor with the highest comprehensive efficiency0For no-load active loss, Q, of the motor0For no-load reactive power of the motor, KQFor the reactive economic equivalence of the motor, QNFor reactive power, Δ P, at rated load of the machineNActive loss when the motor is rated for load;
s22, further comprising adopting a formula of four
Figure FDA0003062536460000021
Figure FDA0003062536460000022
Calculating the output power of the pump, wherein rho is the density of the liquid, g is the acceleration of gravity, and P is2Is a pumpOutlet pressure value of (P)1Is the value of the pressure at the inlet of the pump, Z2For the delivery outlet of the pump, height of pressure gauge, Z1Is the height of the input pressure gauge of the pump, and Q is the actual displacement of the pump.
2. The infusion pipe network energy-saving monitoring method according to claim 1, characterized in that: the electric energy monitoring device comprises an electric energy analyzer or a motor control cabinet, and the flow monitoring device comprises an ultrasonic flowmeter.
3. The infusion pipe network energy-saving monitoring method according to claim 1, characterized in that: the pump motor is connected in series with a single-pole multi-throw switch K, the fixed end of the single-pole multi-throw switch K is coupled to the pump motor, and a plurality of movable ends of the single-pole multi-throw switch K are coupled to each secondary side L2 respectively.
CN201910673372.3A 2019-07-24 2019-07-24 Energy-saving monitoring method for infusion pipe network Active CN110486264B (en)

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Publication number Priority date Publication date Assignee Title
JP3573602B2 (en) * 1997-07-11 2004-10-06 株式会社荏原製作所 Pump test equipment
CN101013625B (en) * 2006-12-21 2010-09-22 中国科学院电工研究所 Current-limiting reactor of electric power
CN107906022A (en) * 2017-10-18 2018-04-13 江苏大学 A kind of online energy consumption testing analysis method of water pump based on wireless sensor network
CN109061470A (en) * 2018-09-04 2018-12-21 苏州太谷电力股份有限公司 The data acquisition analysis method and real-time analyzer of terminal motor
CN109899041B (en) * 2019-03-28 2020-04-10 中国石油化工股份有限公司 Energy consumption evaluation method for oil field ground gas injection system

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