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GB/T 39984-2021: Pump system energy assessment
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Pump system energy assessment
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GB/T 39984-2021
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Basic data | Standard ID | GB/T 39984-2021 (GB/T39984-2021) | | Description (Translated English) | Pump system energy assessment | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J71 | | Word Count Estimation | 44,452 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 39984-2021: Pump system energy assessment---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Pump system energy assessment
ICS 23.080
J71
National Standards of People's Republic of China
Pump system energy consumption assessment
(ISO /ASME14414.2019, IDT)
Released on 2021-04-30
2021-11-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Table of contents
Foreword Ⅲ
Introduction Ⅳ
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 Authority and functions of the assessment team 2
4.1 Determination of the responsibilities of the assessment team 2
4.2 Organizational structure, leadership settings and capabilities of the assessment team 2
4.3 Facility support 3
4.4 Communication 3
4.5 Access to and acquisition of facilities, personnel and information 3
4.6 Evaluation objectives, scope and boundaries 3
4.7 Action Plan 3
4.8 Collection and evaluation of raw data 4
4.9 Goal check 5
5 Implementation evaluation 5
5.1 Evaluation level 5
5.2 On-site preliminary investigation 7
5.3 Analysis of system function requirements 8
5.4 Determine system boundaries and system energy consumption requirements 8
5.5 Information needed to assess pump system efficiency 8
5.6 Data collection 11
5.7 Cross validation 12
5.8 Summary meeting, preliminary findings and recommendation report 12
6 Reports and documents 12
6.1 Final Evaluation Report 12
6.2 Data for third-party review 12
6.3 Review of the final report by members of the evaluation team 12
Appendix A (Normative Appendix) Report Content 13
Appendix B (informative appendix) Suggested examples of system efficient operation and energy saving 16
Appendix C (informative appendix) Professional knowledge, experience and ability 29
Appendix D (informative appendix) Analysis Software Reference Guide 31
Appendix E (informative appendix) Example of pre-screening worksheet 32
Appendix F (informative appendix) Specific energy consumption 33
Appendix G (informative appendix) Parasitic power of pump system 36
Appendix H (informative appendix) Examples of pump system efficiency indicators 38
Reference 40
Pump system energy consumption assessment
1 Scope
This standard specifies the requirements for the implementation of pump system energy consumption assessment (hereinafter referred to as "assessment") and the formation of result reports. The system here includes
The whole process of energy input to complete work output from this energy.
The evaluation goal of pumping system energy consumption is to determine the current energy consumption of the existing system and find ways to improve the efficiency of the system.
These requirements include.
---Organize and implement evaluation;
---Analyze and evaluate the data;
---Report and archive the evaluation results.
This standard applies to open and closed circuit pumps commonly used in industries, public institutions, commercial and municipal facilities that need to be evaluated.
This standard applies to the evaluation of electric drive pump systems that are dominant in most industrial facilities, but it also applies to other drive types such as steam.
Turbines and engines, etc.
But this standard.
a) Does not specify how to design the pump system;
b) It does not specify the qualifications and professional knowledge that the standard user should have (Appendix C only specifies the professional knowledge and expertise that the evaluator should have
Experience and competency requirements);
c) does not involve the training or qualification of personnel;
d) Does not stipulate the implementation requirements of the recommendations made in the evaluation process, but stipulates the requirements for the preparation of an action plan;
e) Does not specify the measurement and confirmation requirements for energy saving due to the implementation of the evaluation recommendations;
f) Does not specify the measurement requirements in the evaluation process and the calibration requirements of the measuring equipment used;
g) Does not specify the implementation cost estimate or financial analysis of the recommendations made in the evaluation process;
h) It does not specify the specific steps required for the safe operation of the equipment during the assessment process. Responsible for the facility during the data collection stage of the assessment process
Normal operation personnel should ensure the safety of equipment operation;
i) No intellectual property rights, security, confidentiality and safety are involved.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document.
ISO 17769-1 General terms, definitions, quantities, characters and units for liquid pumps and their devices. Part 1.Liquid pumps (Liquid
pumpsandintalation-Generalterms,definations,quantities,lettersymbolsandunits-Part 1.
Liquidpumps)
ISO 17769-2 General terms, definitions, quantities, characters and units for liquid pumps and their devices-Part 2.Pump system (Liquid
pumpsandintalation-Generalterms,definations,quantities,lettersymbolsandunits-Part 2.Pum-
pingsystem)
3 Terms and definitions
The following terms and definitions defined by ISO 17769-1 and ISO 17769-2 apply to this document.
The assessment agency should appoint the assessment team leader. In addition to the assessment agency, the assessment team leader can be a person from the facility or an external assessment team.
As an auditor. When the evaluation team is not large, the team leader can be a competent internal reviewer.
4.3 Facility support
The facility should understand and support the evaluation activities.
Within the scope of necessary assessment, the facility side shall allow its own personnel to participate in the assessment.
The evaluation team shall obtain the following written support from the facility management before implementing the evaluation.
--- Commit the necessary funds, personnel and other resources to support the evaluation activities;
---Commit to communicate with facility management personnel and inform the importance of evaluation.
4.4 Communication
The communication channels needed for the evaluation should be established.
The evaluation team should provide clear guidelines for communication among evaluation team members so that all necessary information and data can be exchanged in a timely manner.
This information and data should include management data, logistics information, and operation and maintenance data.
4.5 Access to and acquisition of facilities, personnel and information
The evaluation team should have access to.
---Assess the involved facility area and pump system;
---Facilities related personnel (engineering and technical personnel, operators, maintenance personnel, etc.), equipment suppliers, contractors and other personnel to collect
Useful information for evaluation activities and data analysis, used to prepare reports;
---Other information resources, such as drawings, manuals, data sheets, maintenance records, test reports, historical cost information, computer monitoring and control
Control data, electrical equipment panels and calibration records.
All these raw data, which are initially determined to be essential for the evaluation activities, should be passed through contact with experienced and knowledgeable personnel from the facility.
Obtained after discussion.
4.6 Evaluation objectives, scope and boundaries
The overall objective and scope of the evaluation, including some of the facilities and system boundaries to be evaluated, should be discussed and reached by the evaluation team at the beginning stage
Unanimous.
The assessment team should prepare a list of site-specific targets for each pump system, such as performance improvement targets.
4.7 Action plan
4.7.1 General
In order to facilitate the evaluation and make all members of the evaluation team know how to conduct the evaluation, the evaluation team should prepare a preliminary action plan and discuss it with the system industry.
The Lord agreed.
The action plan should be flexible enough to adapt to the various results that appear during the evaluation process. These include.
a) Establish evaluation goals, in particular.
1) Determine the system boundary (see 5.4);
2) Check the information collected before the start of the evaluation;
3) Determine the degree of understanding of the system and the general information that must be obtained;
4) The level 1 assessment starts (see 5.1.2).
b) Information objectives of the evaluation (see 5.1).
1) Determine the boundaries of the evaluation;
2) Determine the system to be evaluated;
3) Determine the specific information available and the information that must be collected;
4) Determine the information that can be obtained from paper records (such as logbooks) or computer systems in the facility and the systems that should be measured
parameter;
5) Identify the personnel involved in and responsible for the necessary data collection.
c) Establish measurement requirements (see 5.6), in particular.
1) Determine whether the operating conditions at only a certain moment are sufficient for evaluation (level 2, see Table 1), or whether it is necessary to collect in
Information within a certain period of time (level 3, see Table 2);
2) Determine whether the permanently installed measuring equipment is available and reliable.
d) Determine the target of additional information, especially the actual process requirements (see 5.4).
e) Determine the methods needed to achieve the objective of the evaluation information.
1) Refer to Appendix B to determine the data analysis method;
2) Determine the tools/software programs to be used.
f) Determine the content and responsibilities of the report.
4.7.2 Evaluation schedule
Before the evaluation begins, the evaluation date, as well as the date and time of important meetings, should be clarified.
The evaluation meeting should include.
---The kick-off meeting should be held just before the start of the evaluation. The purpose of the meeting is to review the data collected from the initial collection and evaluation
Information (see 4.8) and establish a work schedule. During the meeting, the assessment team should discuss security protocols, tools, methods, measurements, and requirements.
The metering and diagnostic equipment, etc. are discussed.
---On-site assessment schedule.
---According to the opinions reached by the assessment team, it is advisable to report to the facility management in the form of task reports on a regular basis.
---Conduct a summary meeting after the on-site activity is over. Its purpose is to outline the evaluation survey and give preliminary recommendations (see 5.8).
The evaluation team shall determine corrective measures for abnormal situations that may or have occurred during the evaluation period (such as computer recording system failures).
4.8 Collection and evaluation of raw data
4.8.1 General
Before the evaluation begins, raw data should be collected [see 4.7.1a) and b)]. To speed up the data collection process, relevant data can be collected in advance.
Note. This information will be used in all evaluation stages.
4.8.2 Initial communication with facility experts
The assessment team shall collect equipment operation information and any operation that has an impact on equipment energy consumption through communication with facility personnel and experts
factor.
The assessment team should also contact the relevant personnel of the facility, who understand that changes in the pump system will affect the associated system.
4.8.3 Implementation history of energy saving projects
The evaluation team should collect and review the energy-saving projects, evaluations, audits, benchmarks, and energy consumption levels of the same industry that have been implemented for the pump system to be evaluated.
4.8.4 Energy costs
The review team should collect cost data, including the cost of electricity per kilowatt hour, or other similar items, taking into account all costs, such as demand fees
Usage, peak rate, daily rate for each time period and other fees charged according to actual usage. If necessary, consider generating on-site power generation
These costs can be used for subsequent analysis, such as on-site power generation, there should be exempted costs or potential energy sales costs.
The evaluation team shall agree on the effective period of cost incurred.
i) The functional requirements of the pump system change over time, but the pump does not change accordingly;
j) Pump impellers, guide vanes, vanes, seal rings or pump bodies are worn, corroded, deformed or damaged (if the facility has relevant information, it can be
Provided by the provider);
k) Blockage of pipes or pumps (usually found through historical data);
l) The system has a lower pump system efficiency index (see Appendix H);
m) The valve is stuck or the recirculation valve is leaking;
n) Sealing systems, especially high-temperature sealing systems that require cooling (see B.4.3);
o) In a suitable location, the inlet lacks a screen.
5.3 Analysis of system function requirements
The evaluation team should clarify the normal operating conditions of the system, as well as extreme and abnormal operating conditions, and understand the design and operation of the system.
Limits, and how operating conditions are distributed over time.
If there is no accurate operation record and the facility operator cannot provide the required information, the assessment team should perform a review of the system during certain time periods
Perform continuous monitoring to establish the demand information of the system.
5.4 Determine system boundaries and system energy consumption requirements
The evaluation team shall determine the system boundary and system energy consumption requirements of each pump system that undergoes level 2 and level 3 assessments.
Note. If the subsystem is a part of a large facility system, the system boundary is very complicated, so before any measurement and calculation of this type of system, all
We must first clarify the system boundary.
5.5 Information needed to evaluate the efficiency of the pump system
5.5.1 General
After clarifying which pump systems need to be further evaluated, the information listed in 5.5.2~5.5.6 should be collected.
The evaluation team shall determine the data required for each system to be evaluated.
The evaluation team shall ensure that the design and implementation of the measurement plan are consistent, repeatable and reproducible.
The measurement plan should follow the principles of safety, openness and reliability.
The measurement plan should include measurement data used to calculate the annual energy consumption baseline of the pump system. The typical approach is to measure instantaneous flow, pressure,
Electrical parameters, and determine the operating time of the system under different working conditions.
In order to ensure the accuracy of the data, the data should be cross-checked.
5.5.2 Motor/drive information
The original information data of the motor/drive device collected from the nameplate (if any) or the manufacturer's data manual should include.
a) Power frequency;
b) Specification (rated power);
c) Rated speed;
d) Rated voltage;
e) Full load current (FLA) --- motor current under rated power;
f) Motor power rating information;
g) Nominal efficiency or efficiency class (if given);
h) Type and characteristics;
i) Drive type (e.g. variable frequency drive, belt drive, gear drive, direct connection);
j) Historical records (such as original motors, re-wound motors, and replaced motors).
5.5.3 Pump information
5.5.3.1 Rotary power pump
The nameplate information (if any) of the pump and all records in the file should be obtained.
If the data obtained from the pump nameplate and the record file is inconsistent, it should be marked and mentioned in the subsequent system evaluation process. Required pump
The information (if any) should include.
a) The type and model of the pump;
b) Manufacturer's name;
c) serial number;
d) Customer tag number;
e) The number of pump stages;
f) Drive type;
g) Rated speed in revolutions per minute (r/min);
h) Design point (flow and head);
i) Impeller diameter (installation diameter and maximum diameter);
j) Pump performance curve, including rated head, flow, power, efficiency and required NPSH (NPSHR) (if any);
k) Maintenance records;
l) Description of pump cavitation or backflow problems;
m) Sealing system data.
5.5.3.2 Volume (PD) pump
The nameplate information (if any) of the pump and all records in the file should be obtained.
If the data obtained from the pump nameplate and the record file is inconsistent, it should be marked and mentioned in the subsequent system evaluation process. Required pump
The information (if any) should include.
a) The type and model of the pump.
b) The name of the manufacturer.
c) Serial number.
d) Customer tag number.
e) Pump description/model number.
f) Rated parameters of the pump.
1) Rotation speed, the unit is revolutions per minute (r/min);
2) Pressure in bar (bar);
Note. 1bar=0.1MPa.
3) Temperature in degrees Celsius (℃);
4) Power, in kilowatts (kW).
g) System data (operating conditions).
h) Pressure relief valve setting.
i) Pump performance curve.
j) Maintenance records.
k) Description of pump cavitation, backflow or other operating problems.
l) Sealing system.
5.5.4 Transport liquid characteristic information
The liquid information should include.
a) Liquid name;
b) Dynamic viscosity;
c) temperature;
d) density;
e) solid particles and their characteristics;
f) The steam pressure under the operating pressure and temperature of the system;
g) Percentage of free gas;
h) danger;
i) Flammability.
5.5.5 Detailed system data
System data information should include.
a) System layout.
b) Abnormal operation status.
c) Pipeline and instrument flow chart (PID chart).
d) Pump control method.
1) Variable speed drive (VSD);
2) Throttle valve (valve opening, if any);
3) Bypass/return;
4) Start/stop;
5) Multiple pumps are connected in series or parallel, or work separately;
6) No control (the pump starts directly).
For rotary power pumps, the following additional information should be collected.
---Static head and system curve;
---The effective NPSH (NPSHA);
---Load distribution. Through discussions with operators, the estimated operating time of the year, quarter, week, and day under different flow rates can be obtained.
For volumetric (PD) pumps, the following additional information should be collected.
---Outlet pressure;
---Inlet pressure;
--- Effective net positive suction pressure (NPIPA).
When necessary, additional information such as the effective cavitation margin of the rotary power pump and the effective net positive suction pressure of the positive displacement pump should be collected.
5.5.6 Measurement data
5.5.6.1 Electrical data
The required electrical data should include one of the following.
---Power (kW);
---The actual voltage, current and power factor used to calculate the power.
5.5.6.2 System operating data
In order to determine where the energy consumption increases in the system, sufficient operating data should be collected during the assessment, which should include.
---The flow rate of each circulation loop in the system;
---Pump shaft speed, the unit is revolutions per minute (r/min) (if available);
---Control valve set point and valve opening;
---The liquid level and pressure of the water supply tank and the receiving water tank;
---Other operating equipment installed.
5.6 Data collection
5.6.1 System Information
If possible, the evaluation team should determine the system curve of the pump system. For most systems, the system curve can be determined by two different
The working condition points are calculated, and the two working condition points are the static head at the zero flow point and one operating condition point.
Note. To understand the impact of the entire pump system and any local changes in the system on the entire system, the system curve is essential. In very special circumstances,
The system curve cannot be determined, but the operating point of the pump can still be determined.
The function of the parameter to be measured changing with time should be established for proper measurement.
5.6.2 Running data measurement of pump and motor
The initial required data that should be measured are pressure, flow, power and running time.
If the operating conditions of the pump system are constant or change little over time, the operating conditions at a certain moment are sufficient to meet the requirements of system evaluation.
If the system requirements change over time, the assessment team should determine whether it is necessary to monitor the system over time, and monitor reasonably
Time period so that it can represent all working conditions.
If there are operating data in the facility process control or working condition history database, these data can also be used.
During the evaluation, the uncertainty of the evaluation measurement and the final result should be determined.
5.6.3 Pressure
A calibrated pressure gauge should be used to measure pressure. The best measurement point should be in the straight pipe section, about twice the distance from the inlet and outlet flanges (if any)
Pipe diameter.
In order to measure the efficiency of the pump, the pressure measuring point should be close to the inlet and outlet of the pump.
When measuring pump performance, it is recommended to estimate the head loss between the pump suction and discharge measurement points.
In order to accurately calculate the head, the flow rate and the installation height of the measuring instrument should be considered.
5.6.4 Flow
The flow rate of the system should be determined to obtain the efficiency of the pump and the system.
The following procedures should be used.
a) The flow rate should be accurately measured.
1) It is the preferred method to measure the flow rate using equipment of appropriate size and calibration at the appropriate location;
2) When the measurement location may be affected by flow disturbances, it is recommended to use different devices or locations to measure the flow separately;
3) Similarly, it is recommended to use an independent method to check the flow measurement and estimation results separately, see 5.7.
b) When the flow rate is due to any reason (including physical space, pipe geometry or fouling, or problems caused by the treated fluid)
When it is impossible to measure, it can be estimated using the pump performance curve and the pressure drop of the known loss parts.
5.6.5 Input power
If feasible, the power meter should be used to directly measure the power to give accurate measurement results. When the power meter cannot be used directly to measure power
When, should choose to measure the voltage and current of the motor, and calculate the input power of the motor through the estimated power factor. If using electric drive
For the system, the input power should be measured before the variable frequency drive.
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