Green low-carbon pump house evaluation method

Abstract

The invention provides a green low-carbon pump house evaluation method which is characterized in that comprehensive operation carbon emission, comprehensive operation energy consumption, an automatic control system, operation and maintenance management and technical application of a pump house are evaluated respectively, and evaluation of the comprehensive operation carbon emission and the comprehensive operation energy consumption of the pump house specifically comprises the steps that 1, the comprehensive operation energy consumption is calculated; 2) calculating the comprehensive operation efficiency of the pump house; 3) carrying out conversion on comprehensive operation efficiency and comprehensive operation energy consumption of the pump house; 4) calculating the comprehensive operation carbon emission of the pump house; 5) evaluating the comprehensive operation carbon emission of the pump house; according to the complete operation record of the pump house, the comprehensive operation carbon emission, the comprehensive operation energy consumption, the automatic control system, the operation and maintenance management and the technical application of the pump house can be comprehensively evaluated, the comprehensive performance of the pump house system is comprehensively and accurately reflected, an evaluation report is given, and the star level of the green low-carbon pump house is determined.

Description

Technical Field

[0001] The present invention relates to the technical field of pump houses, and in particular to an evaluation method for green and low-carbon pump houses. Background Art

[0002] A green and low-carbon pump house is a pump house that, on the premise of meeting certain working conditions, has reasonable energy consumption, sufficient energy-saving and carbon-reduction measures, a complete energy management system, an advanced automatic control system, and a sound management system to achieve the green operation of the system. Among them, a pump house is the overall combination of all pump equipment, control systems, valves, pipelines, boxes, power supply and distribution systems, monitoring systems, ventilation systems, lighting facilities, instruments, and necessary auxiliary equipment; the prior art lacks evaluation means for green and low-carbon pump houses and cannot accurately evaluate the comprehensive operating carbon emissions and green and low-carbon operation level of pump houses. Summary of the Invention

[0003] The purpose of the present invention is to provide an evaluation method for green and low-carbon pump houses.

[0004] To achieve the above purpose, the technical solution of the present invention is:

[0005] An evaluation method for green and low-carbon pump houses, characterized in that the comprehensive operating carbon emissions, comprehensive operating energy consumption, automatic control system, operation and maintenance management, and technology application of the pump house are evaluated respectively;

[0006] The evaluation of the comprehensive operating carbon emissions and comprehensive operating energy consumption of the pump house specifically includes the following steps:

[0007] Step 1) Calculate the comprehensive operating energy consumption Wherein, H p = 01 -6 ρgH;

[0008]

[0009] W—the comprehensive operating energy consumption of the pump house, unit kilowatt-hour per cubic meter megapascal [kW·h / (m 3 ·MPa)];

[0010] H p —the average effective head of the pump unit, unit megapascal (MPa),

[0011] H—the average effective head of the pump unit, unit meter (m),

[0012] Q—the average flow rate of the pump unit at the inlet pipe of the pump house, unit cubic meter per hour (m 3 / h),

[0013] E—the total electricity consumption of the pump house during the measurement period, unit kilowatt-hour (kW·h),

[0014] t — Measurement cycle time, unit: hour (h),

[0015] P 1 、P 2 — Average pressures at the inlet and outlet of the pump unit, unit: Pascal (Pa),

[0016] v 1 、v 2 — Average flow velocities at the inlet and outlet of the pump unit, unit: meter per second (m / s),

[0017] z 1 、z 2 — Heights at the inlet and outlet of the pump unit, unit: meter (m),

[0018] ρ — Density of the liquid transported by the pump unit, unit: kilogram per cubic meter (kg / m 3 )), take 1000 kg / m 3 , g — Acceleration due to gravity, unit: meter per square second (m / s 2 ), take 9.8 m / s 2 ;

[0019] Step 2) Calculate the comprehensive operation efficiency of the pump house

[0020] Among them, P e — Effective power of the pump unit, unit: kilowatt (kW);

[0021] Step 3) Conduct conversion between the comprehensive operation efficiency and comprehensive operation energy consumption of the pump house;

[0022]

[0023] Among them, W — Comprehensive operation energy consumption of the pump house, unit: kilowatt-hour per cubic meter megapascal [kW·h / (m 3 ·MPa)];

[0024] Step 4) Calculate the comprehensive operation carbon emissions of the pump house

[0025] Among them, CEPC — Comprehensive operation carbon emissions of the pump house, unit: kilogram carbon dioxide equivalent per cubic meter megapascal [kgCO 2e / (m 3 ·MPa)];

[0026] E g — Green electricity consumption of the compressed air station during the measurement time period, unit: kilowatt-hour (kW·h);

[0027] H p — Average effective head of the pump unit, unit: megapascal (MPa);

[0028] Q—the average flow rate of the pump unit, in cubic meters per hour (m 3 / h);

[0029] t—the measurement cycle time, in hours (h);

[0030] EF—the carbon emission factor of the regional power grid, in kilograms of carbon dioxide equivalent per kilowatt-hour [kgCO 2 / (kW·h)], for example, the carbon emission factor of the Shanghai regional power grid in 2023 is 0.42;

[0031] —the global warming potential of carbon dioxide, with a value of 1;

[0032] Step 5) Evaluate the comprehensive operating carbon emissions CEPC of the pump house, and the evaluation criteria are as follows:

[0033] When the evaluation score is 15 points where E g = 0, substitute the value corresponding to the pump house comprehensive operating energy consumption score of 10 in the following table;

[0034] When the evaluation score is 25 points, where E g = 0, substitute the value corresponding to the pump house comprehensive operating energy consumption score of 15 in the following table;

[0035] When the evaluation score is 35 points, where E g = 0, substitute the value corresponding to the pump house comprehensive operating energy consumption score of 20 in the following table.

[0036] Pump house comprehensive operating energy consumption (secondary water supply)

[0037]

[0038] Pump house comprehensive operating energy consumption (except secondary water supply)

[0039]

[0040] Furthermore, the evaluation of the pump house automatic control system includes evaluating the variable frequency and optimized control of the pump unit, the automatic loading operation / number of units automatic adjustment of the pump unit, the constant pressure or constant temperature control of the pump house system, the fault diagnosis and automatic alarm control, the system automatic optimization control, and the intelligent automatic operation of the pump house.

[0041] Furthermore, the evaluation of the operation and maintenance management of the pump house includes evaluating whether the rules and regulations for the operation and management of the pump house are sound, whether the pump house is clean / whether various signs are clear, whether regular inspections / regular maintenance / inspection and maintenance records are kept, whether independent metering devices for electrical and water-using equipment are complete, whether energy efficiency assessment or carbon management work is carried out, whether a digital management system is established to achieve work order dispatching / fault alarm / record query, and whether encouragement policies related to energy conservation and carbon reduction for employees are formulated.

[0042] Furthermore, the evaluation of the technical applications in the pump house includes evaluating whether the pump house adopts a flow / pressure automatic monitoring system, centralized control / scheduling technology, energy-saving pipeline valve technology, Internet of Things remote monitoring technology, green intelligent power supply system, water quality / leakage automatic monitoring system, and prefabricated high-efficiency pump house.

[0043] Furthermore, the evaluation of the technical applications in the pump house includes evaluating whether it adopts a flow / pressure automatic monitoring system, whether it adopts centralized control / scheduling technology, adopts energy-saving pipeline valve technology, adopts Internet of Things remote monitoring technology, adopts an intelligent power supply system, whether the pump house and water system are system-adjusted, whether an intelligent security system is achieved, whether the variable-frequency direct drive technology of the pump unit is achieved, whether a water quality / leakage and other automatic monitoring systems are adopted, and whether a prefabricated high-efficiency pump house is adopted.

[0044] Based on the complete operation records of the pump house, the present invention can comprehensively evaluate five types of indicators, namely the comprehensive operation carbon emissions, comprehensive operation energy consumption, automatic control system, operation and maintenance management, and technical applications of the pump house, accurately reflect the comprehensive performance of the pump house system in an all-round manner, issue an evaluation report, and determine the star rating of the green and low-carbon pump house. Specific Embodiments

[0045] The technical solutions of the present invention will be described clearly and completely below. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0046] This embodiment discloses a method for evaluating a green and low-carbon pump house, taking a pump house that has been built and operated for more than half a year as the evaluation object, and is applicable to a pump house system equipped with a motor drive with a power of 3 kW or more and a flow rate ≤ 4000 m 3 / h.

[0047] The evaluation grades of the green and low-carbon pump house are divided into three grades: three-star, four-star, and five-star, among which the five-star is the highest grade; the star rating evaluation criteria for the pump house are shown in Table 1.

[0048] Table 1 Star Rating Evaluation Criteria for Green and Low-Carbon Pump Houses

[0049] Star level Control item Scoring item Three-star level Meet ≥60 points Four-star level Meet ≥70 points Five-star level Meet ≥85 points

[0050] The evaluation index system of the pump house consists of control items and scoring items. The pump house should meet all the indicators of the control items. The indicators of the scoring items adopt a scoring system with a full score of 100 points, including five types of indicators: comprehensive operating carbon emissions, comprehensive operating energy consumption, automatic control system, operation and maintenance management, and technology application, as shown in Table 2.

[0051] Table 2 Green and Low-Carbon Pump House Rating Index

[0052]

[0053] The scoring of the comprehensive operating carbon emissions of the pump house is shown in Table 3.

[0054] Table 3 Comprehensive Operating Carbon Emissions of the Pump House

[0055]

[0056] The scoring of the comprehensive operating energy consumption of the pump house is shown in Tables 4 and 5.

[0057] Table 4 Comprehensive Operating Energy Consumption of the Pump House (Secondary Water Supply)

[0058]

[0059] Table 5 Comprehensive Operating Energy Consumption of the Pump House (Except Secondary Water Supply)

[0060]

[0061] The scoring of the automatic control system is shown in Table 6.

[0062] Table 6 Automatic Control System of the Pump House

[0063]

[0064] The scoring of operation and maintenance management is shown in Table 7.

[0065] Table 7 Operation and Maintenance Management of the Pump House

[0066]

[0067] The scoring of technology application is shown in Table 8.

[0068] Table 8 Technology Application of the Pump House

[0069]

[0070] In actual use, the pump house should meet the requirements of users for water pressure, flow rate, and water quality, and then conduct the energy efficiency assessment grade indicators of the pump house. Among them, the energy efficiency indicators of the secondary water supply pump house and the water transmission and distribution pump house for non-secondary water supply are evaluated separately, as shown in Tables 4 and 5.

[0071] The comprehensive operating energy consumption of the pump house refers to the power consumption for transporting and distributing a unit volume of water at a certain head (the average unit energy consumption of the comprehensive operation of the pump house), and its value is expressed in kW·h / (m 3 ·MPa). For the calculation method of the comprehensive operating energy consumption of the secondary water supply pump house, refer to GB / T38594. For the calculation method of the comprehensive operating energy consumption of the water transportation and distribution pump house without secondary water supply, see A.2.

[0072] When there are two or more independent water systems in the pump house, they shall be evaluated separately according to the parameters of the independent systems.

[0073] The comprehensive operating energy consumption W of the pump house is calculated according to Equation (A.1):

[0074]

[0075] where H p is calculated according to Equation (A.2):

[0076] H p =10 -6 ρgH (A.2)

[0077] where H is calculated according to Equation (A.3):

[0078]

[0079] In the formula:

[0080] W—the comprehensive operating energy consumption of the pump house, with the unit of kilowatt-hour per cubic meter megapascal [kW·h / (m 3 ·MPa)];

[0081] H p —the average effective head of the pump unit, with the unit of megapascal (MPa), H—the average effective head of the pump unit, with the unit of meter (m);

[0082] Q—the average flow rate of the pump unit, at the inlet pipe of the pump house, with the unit of cubic meter per hour (m 3 / h);

[0083] E—the total electricity consumption of the pump house during the measurement period, with the unit of kilowatt-hour (kW·h);

[0084] t—the measurement cycle time, with the unit of hour (h);

[0085] P 1 、P 2 —the average pressures at the inlet and outlet of the water pump unit, with the unit of pascal (Pa);

[0086] v 1 、v 2 —the average flow velocities at the inlet and outlet of the water pump unit, with the unit of meter per second (m / s);

[0087] z 1 — the height at the inlet and outlet of the pump unit, in meters (m); 2 — the height at the inlet and outlet of the pump unit, in meters (m);

[0088] ρ — the density of the liquid transported by the pump unit, in kilograms per cubic meter (kg / m 3 ), for water, it is 1000 kg / m at 4°C 3 .

[0089] g — the acceleration of gravity, in meters per second squared (m / s 2 ), take 9.8 m / s 2 .

[0090] The overall operating efficiency of the pump house, that is, the percentage (%) of the effective power to the actual electricity consumption per unit time of the pump house, is calculated according to Equation (B.1):

[0091]

[0092] Among them, P e is calculated according to Equation (B.1.2):

[0093]

[0094] In the formula:

[0095] η — the overall operating efficiency of the pump house, %;

[0096] P e — the effective power of the pump unit, in kilowatts (kW);

[0097] The conversion between the overall operating efficiency and the unit consumption of the overall operating energy consumption is calculated according to Equation (B.3):

[0098]

[0099] The conversion between the overall operating efficiency of the pump house and the overall operating energy consumption is shown in Table B.

[0100] Table B Conversion Table of Overall Operating Efficiency and Overall Operating Energy Consumption of Pump House

[0101]

[0102] The ratio of the carbon emission generated by the regular operation of the pump house to the overall operating energy consumption of the pump house, and its value is expressed in kgCO 2e / (m 3 ·MPa), abbreviated as CEPC.

[0103] The overall operating carbon emission CEPC of the pump house is calculated according to Equation (C.1):

[0104]

[0105] In the formula:

[0106] CEPC—Carbon emissions during the comprehensive operation of the pump house, unit: kilograms of carbon dioxide equivalent per cubic meter of megapascal [kgCO 2e / (m 3 ·MPa)];

[0107] W—Comprehensive operation energy consumption of the pump house, unit: kilowatt-hour per cubic meter of megapascal [kW·h / (m 3 ·MPa)];

[0108] E g —During the measurement time period, the green electricity consumption of the compressed air station, unit: kilowatt-hour (kW·h);

[0109] H p —Average effective head of the pump unit, unit: megapascal (MPa);

[0110] Q—Average flow rate of the pump unit, at the inlet pipe of the pump house, unit: cubic meter per hour (m 3 / h);

[0111] t—Measurement cycle time, unit: hour (h);

[0112] EF—Carbon emission factor of the regional power grid, unit: kilograms of carbon dioxide equivalent per kilowatt-hour [kgCO 2 / (kW·h)], the carbon emission factor of the Shanghai regional power grid in 2023 is 0.42 kgCO 2 / (kW·h);

[0113] —Global warming potential of carbon dioxide, the value is 1.

[0114] CEPC evaluation index when the evaluation score is 15 points: Calculate according to formula (C.1), where E g = 0, and W is substituted with the value corresponding to 10 points of the comprehensive operation energy consumption in Tables 4 and 5.

[0115] CEPC evaluation index when the evaluation score is 25 points: Calculate according to formula (C.1), where E g = 0, and W is substituted with the value corresponding to 15 points of the comprehensive operation energy consumption in Tables 4 and 5.

[0116] CEPC evaluation index when the evaluation score is 35 points: Calculate according to formula (C.1), where E g = 0, and W is substituted with the value corresponding to 20 points of the comprehensive operation energy consumption in Tables 4 and 5.

[0117] Scoring table for green and low-carbon pump houses, see Table D.

[0118] Table D Scoring Table for Green and Low-carbon Pump Rooms

[0119]

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A green and low-carbon pump room evaluation method, characterized in that: The comprehensive operation carbon emissions, comprehensive operation energy consumption, automatic control system, operation and maintenance management and technical application of the pump room were evaluated separately. The evaluation of the comprehensive operation carbon emissions and comprehensive operation energy consumption of the pump room specifically includes the following steps: Step 1) Calculate the comprehensive operating energy consumption Among them, H p =10 -6 ρgH; W is the comprehensive operating energy consumption of the pump room, in kilowatt-hours per cubic meter MPa [kW·h / (m 3 MPa)]; H p - Average pressure of the pump unit, in megapascals (MPa), H-average effective head of the pump unit, in meters (m), Q-average flow rate of the pump unit, in cubic meters per hour (m 3 / h), E- total electricity consumption of the pump room during the measurement period, in kilowatt-hours (kW·h), t- measurement cycle time, in hours (h), P1, P2-the average pressure at the inlet and outlet of the pump unit, in Pascal (Pa), v1, v2-the average flow velocity at the inlet and outlet of the pump unit, in meters per second (m / s), z1, z2-the height of the inlet and outlet of the pump unit, in meters (m), ρ-density of the liquid delivered by the pump unit, in kilograms per cubic meter (kg / m 3 ), take 1000kg / m 3 , g-gravitational acceleration, in meters per square second (m / s 2 ), take 9.8m / s 2 ; Step 2) Calculate the overall operating efficiency of the pump room in, P e -Effective power of the pump unit, in kilowatts (kW); Step 3) converting the comprehensive operation efficiency and comprehensive operation energy consumption of the pump room; Where W is the comprehensive operating energy consumption of the pump room, in kilowatt-hours per cubic meter MPa [kW·h / (m 3 MPa)]; Step 4) Calculate the comprehensive carbon emissions of the pump room operation Among them, CEPC-pump room comprehensive operation carbon emissions, unit kgCO 2e / (m 3 MPa); E g -Green electricity consumption of the compressed air station during the measurement period, in kilowatt-hours (kW·h); H p -Average effective head of the pump unit, in megapascals (MPa); Q—Average flow rate of the pump unit, in cubic meters per hour (m 3 / h); t—measurement cycle time, in hours (h); EF—regional power grid carbon emission factor, unit: kgCO2 / (kW·h). For example, the carbon emission factor of the Shanghai regional power grid in 2023 is 0.

42. —The global warming potential of carbon dioxide is 1; Step 5) Evaluate the pump room comprehensive operation carbon emissions CEPC, the evaluation criteria are as follows: When the evaluation score is 15 points, Where E g =0, W is substituted with the value corresponding to the comprehensive operation energy consumption score of the pump room of 10 in the table below; When the evaluation score is 25 points, Where E g =0, W is substituted with the value corresponding to the comprehensive operation energy consumption score of the pump room of 15 in the table below; When the evaluation score is 35 points, Where E g =0, W is substituted with the value corresponding to the comprehensive operating energy consumption score of 20 for the pump room in the table below. Comprehensive operating energy consumption of pump room (secondary water supply) Comprehensive operating energy consumption of pump room (excluding secondary water supply) 2. A green and low-carbon pump room evaluation method according to claim 1, characterized in that: The evaluation of the pump room automatic control system includes the frequency conversion and optimization control of the pump units, automatic loading and operation of the pump units / automatic adjustment of the number of units, constant pressure or constant temperature control of the pump room system, automatic alarm control for fault diagnosis, automatic optimization control of the system and intelligent automatic operation of the pump room.

3. A green and low-carbon pump room evaluation method according to claim 1, characterized in that: The evaluation of the pump room operation and maintenance management includes whether the rules and regulations for the operation and management of the pump room are sound, whether the pump room is tidy / various signs are clear, whether regular inspections / regular maintenance / keeping of inspection and maintenance records are carried out, whether independent meters for electricity and water equipment are complete, whether energy efficiency assessment or carbon management work is carried out, whether a digital management system is established to realize work order distribution / fault alarm, and whether incentive policies related to employee energy conservation and carbon reduction are formulated.

4. A green and low-carbon pump room evaluation method according to claim 1, characterized in that: The application of pump room technology includes evaluating whether the pump room adopts flow / pressure automatic monitoring system, centralized control / dispatching technology, energy-saving pipeline valve technology, Internet of Things remote monitoring technology, green intelligent power supply system, water quality / leakage automatic monitoring system, and assembled high-efficiency pump room.

5. A green and low-carbon pump room evaluation method according to claim 4, characterized in that: The application of pump room technology includes evaluation of whether the pump room and water system are adjusted, whether the intelligent security system is realized, and whether the variable frequency direct drive technology of the pump unit is realized.

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