CN105221385A - Air-conditioning system different lift different flow Combined water pump structure and controlling method - Google Patents
Air-conditioning system different lift different flow Combined water pump structure and controlling method Download PDFInfo
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- CN105221385A CN105221385A CN201510702593.0A CN201510702593A CN105221385A CN 105221385 A CN105221385 A CN 105221385A CN 201510702593 A CN201510702593 A CN 201510702593A CN 105221385 A CN105221385 A CN 105221385A
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Abstract
The present invention relates to the different lift different flow Combined water pump structure of air-conditioning system, it is characterized in that: in the refrigeration end inlet opening of air-conditioning system, round-the-clock energy-saving water pump structure is set, described round-the-clock energy-saving water pump structure is composed in parallel by some water supply loops, each bar water supply loop is composed in series by a variable-frequency type water pump and a handpiece Water Chilling Units, the variable frequency pump of each water supply loop has different lift structures and different flow structures, the handpiece Water Chilling Units of each water supply loop is different cold, the unit that vaporizer resistance is different, formation has the different lift of multiple stage, the variable frequency pump parallel connection structure of different flow, the control end of variable frequency pump parallel connection structure is connected with control structure, controls each variable frequency pump be operated within the scope of efficient district by this control structure, to form the round-the-clock energy-saving water pump structure that the parallel connection of multiple stage different lift different flow variable frequency pump is formed.The beneficial effects such as the present invention has round-the-clock energy-saving run, water pump operation is stable, efficiency is high, energy consumption is low and operating cost is low.
Description
Technical field
The present invention relates to a kind of controlling method of air-conditioning system water pump, particularly relate to a kind of air-conditioning system different lift different flow Combined water pump structure and controlling method.Belong to Heating,Ventilating and Air Conditioning (HVAC) technical field.
Background technique
In air conditioning system for building, the energy consumption of water pump of air conditioner structure accounts for about 20% of air conditioning energy consumption, and the energy-saving run of water pump structure concerns the fractional energy savings of whole air-conditioning system.Structure model selection and structural configuration to be carried out to water pump of air conditioner for this reason.And the structure model selection of water pump of air conditioner and structural configuration, mainly according under design conditions, water pump structure the flow and lift of pipe network be responsible for consider.
Air-conditioning system, when whole year operation, because air conditioning terminal institute water requirement is change in Various Seasonal, if do not supplied water to the water pump of air-conditioning system carry out regulation and control, will cause energy dissipation.In prior art, also do not occur not occurring the energy-saving control method of the raw water service pump to air-conditioning system by the water pump structure that water output changes along with the water consumption change of air conditioning terminal yet.Therefore, there is problem that is inefficient, high energy consumption in the air-conditioning system of prior art.
Therefore, the round-the-clock energy-saving water pump structure and the controlling method that design a kind of air-conditioning system is needed
Summary of the invention
An object of the present invention is to solve in the air-conditioning system of prior art, cools the state that unit and water pump are in instability for a long time, poor efficiency, high energy consumption are run, cause the problem of huge energy consumption during whole year operation; There is provided a kind of air-conditioning system different lift different flow Combined water pump structure.
Object two of the present invention is to solve in the air-conditioning system of prior art, cools the state that unit and water pump are in instability for a long time, poor efficiency, high energy consumption are run, cause the problem of huge energy consumption during whole year operation; A kind of air-conditioning system controlling method of different lift different flow Combined water pump structure is provided.
An object of the present invention can reach by taking following technological scheme:
The different lift different flow Combined water pump structure of air-conditioning system, its structural feature is: arrange round-the-clock energy-saving water pump structure in the refrigeration end inlet opening of air-conditioning system, described round-the-clock energy-saving water pump structure is composed in parallel by some water supply loops, each bar water supply loop is composed in series by a variable-frequency type water pump and a handpiece Water Chilling Units, the variable frequency pump of each water supply loop has different lift structures and different flow structures, the handpiece Water Chilling Units of each water supply loop is different cold, the unit that vaporizer resistance is different, formation has the different lift of multiple stage, the variable frequency pump parallel connection structure of different flow, the control end of described variable frequency pump parallel connection structure is connected with control structure, controlling each variable frequency pump by this control structure is operated within the scope of efficient district, to form the round-the-clock energy-saving water pump structure that the parallel connection of multiple stage different lift different flow variable frequency pump is formed.
An object of the present invention can also reach by taking following technological scheme:
Further, described variable frequency pump is operated in efficient district scope, refers to that each variable frequency pump is operated in the operating mode of 85% of setting pump efficiency >=pumps design operating mode peak efficiency.
Further, described round-the-clock energy-saving water pump structure is composed in parallel by four water supply loops, and every bar water supply loop is composed in series by a variable-frequency type water pump and a handpiece Water Chilling Units.
Two of object of the present invention can reach by taking following technological scheme:
The air-conditioning system controlling method of different lift different flow Combined water pump structure, is characterized in that:
1) the round-the-clock energy-saving water pump structure that the parallel connection of multiple stage different lift different flow variable frequency pump is formed is set, in the plane coordinates system of flow Q, lift H, determine the pipe system performance curve R-HQ of air-conditioning system, pump head-rating curve H-Q, pump efficiency-flow curve η-Q, the lift that operating point for design a is corresponding and flow are rated lift and design discharge;
2) be high efficiency area of pump operation when being set in 85% of pump efficiency >=pumps design operating mode peak efficiency, the variable frequency pump controlling round-the-clock energy-saving water pump structure remains on efficient district and runs, the efficiency of variable frequency pump remains between η a-η c corresponding in pump efficiency-flow curve η-Q, the operating flux of described water pump is controlled between Qc-Qa corresponding in pump head-rating curve H-Q, to ensure that described variable frequency pump runs in efficient district simultaneously;
3) under the different operating mode of whole year operation, when all parallel connection frequency conversion water pumps are adjusted to the minimum discharge in Effec-tive Function district, when the total Water that parallel water pump provides still is greater than air conditioning terminal system institute water requirement, pass through unit number control, reduce the operation number of units of water pump, the operating flux of residue work each variable frequency pump is made to be positioned at high efficiency area of pump operation range of flow, when the variable frequency pump worked is one, water pump is allowed to be fallback at more small flow, to ensure that variable frequency pump is within the annual most of the time, is in efficient operation.
Two of object of the present invention can also reach by taking following technological scheme:
Further, H-Q-n1, H-Q-n2, H-Q-n3 and H-Q-n4 tetra-pipe system performance curves are comprised in the plane coordinates system of flow Q, lift H, pump head-rating curve wherein under H-Q-n1 design speed, H-Q-n2, H-Q-n3 and H-Q-n4 are the pump head-rating curve under different loads rotating speed, n1 is rotating speed under power frequency, and n2, n3, n4 are rotating speed under sub load frequency conversion operating mode, η-Q is pump efficiency-flow curve, and a point is operating point for design, and corresponding lift and flow are rated lift and design discharge, and corresponding pump efficiency is peak efficiency, when actual motion, flow is less than or equal to design discharge, keep system-head curve constant, pass through variable frequency adjustment, pump rotary speed is reduced, meet actual amount of water demand, pump rotary speed n4 < n3 < n2 < n1, corresponding running state point is respectively d, c, b, a point, corresponding flow, lift, efficiency is: Qd < Qc < Qb < Qa, Hd < Hc < Hb < Ha, η d < η c < η b < η a, wherein η c=0.85 η a.
The present invention has following outstanding beneficial effect:
1, the different lift different flow Combined water pump structure of the air-conditioning system that the present invention relates to, in the refrigeration end inlet opening of air-conditioning system, round-the-clock energy-saving water pump structure is set, described round-the-clock energy-saving water pump structure is composed in parallel by some water supply loops, each bar water supply loop is composed in series by a variable-frequency type water pump and a handpiece Water Chilling Units, the variable frequency pump of each water supply loop has different lift structures and different flow structures, the handpiece Water Chilling Units of each water supply loop is different cold, the unit that vaporizer resistance is different, formation has the different lift of multiple stage, the variable frequency pump parallel connection structure of different flow, the control end of described variable frequency pump parallel connection structure is connected with control structure, controlling each variable frequency pump by this control structure is operated within the scope of efficient district, to form the round-the-clock energy-saving water pump structure that the parallel connection of multiple stage different lift different flow variable frequency pump is formed, therefore, can solve in the air-conditioning system of prior art, the state that unit and water pump are in instability for a long time, poor efficiency, high energy consumption are run is cooled during whole year operation, beneficial effects such as causing the problem of huge energy consumption, there is round-the-clock energy-saving run, water pump operation is stable, efficiency is high, energy consumption is low and operating cost is low.
2, the air-conditioning system of the air-conditioning system that the present invention relates to controlling method of different lift different flow Combined water pump structure, by analyzing pump characteristic, find out water pump Effec-tive Function district, and the pump capacity scope of correspondence, Bound moisture pump frequency conversion controls and unit number control, and in each water pump parallel pipeline of guarantee two sections of equal situations of pressure reduction, water pump can be made within the annual most of the time to be all positioned at efficient district run, therefore, can solve in the air-conditioning system of prior art, during whole year operation, cooling unit and water pump are in instability for a long time, inefficient, the state that high energy consumption is run, cause the problem of huge energy consumption, there is round-the-clock energy-saving run, water pump operation is stablized, efficiency is high, energy consumption is low waits beneficial effect with operating cost is low.
Accompanying drawing explanation
Fig. 1 is water pump and water chiller arrangement schematic diagram in specific embodiment of the invention air-conditioning system.
Fig. 2 is specific embodiment of the invention pipe system performance curve, rating curve, efficiency-flow curve figure.
Pump capacity, lift, efficiency, speed curves figure that Fig. 3 is corresponding when being the different operating point of the specific embodiment of the invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail:
Specific embodiment 1:
With reference to Fig. 1, the different lift different flow Combined water pump structure of the air-conditioning system that the present embodiment relates to, in the refrigeration end inlet opening of air-conditioning system, round-the-clock energy-saving water pump structure is set, described round-the-clock energy-saving water pump structure is composed in parallel by some water supply loops, each bar water supply loop is composed in series by a variable-frequency type water pump and a handpiece Water Chilling Units, the variable frequency pump of each water supply loop has different lift structures and different flow structures, the handpiece Water Chilling Units of each water supply loop is different cold, the unit that vaporizer resistance is different, formation has the different lift of multiple stage, the variable frequency pump parallel connection structure of different flow, the control end of described variable frequency pump parallel connection structure is connected with control structure, controlling each variable frequency pump by this control structure is operated within the scope of efficient district, to form the round-the-clock energy-saving water pump structure that the parallel connection of multiple stage different lift different flow variable frequency pump is formed.
Described variable frequency pump is operated in efficient district scope, refers to that each variable frequency pump is operated in the operating mode of 85% of setting pump efficiency >=pumps design operating mode peak efficiency.
Described round-the-clock energy-saving water pump structure is composed in parallel by four water supply loops, and every bar water supply loop is composed in series by a variable-frequency type water pump and a handpiece Water Chilling Units.
With reference to Fig. 2, Fig. 3, the air-conditioning system that the present embodiment the relates to controlling method of different lift different flow Combined water pump structure, it is characterized in that: 1) the different lift different flow Combined water pump structure of air-conditioning system is set, in the plane coordinates system of flow Q, lift H, determine the pipe system performance curve R-HQ of air-conditioning system, pump head-rating curve H-Q, pump efficiency-flow curve η-Q, the lift that operating point for design a is corresponding and flow are rated lift and design discharge; 2) be high efficiency area of pump operation when being set in 85% of pump efficiency >=pumps design operating mode peak efficiency, the variable frequency pump controlling round-the-clock energy-saving water pump structure remains on efficient district and runs, the efficiency of variable frequency pump remains between η a-η c corresponding in pump efficiency-flow curve η-Q, the operating flux of described water pump is controlled between Qc-Qa corresponding in pump head-rating curve H-Q, to ensure that described variable frequency pump runs in efficient district simultaneously; 3) under the different operating mode of whole year operation, when all parallel connection frequency conversion water pumps are adjusted to the minimum discharge in Effec-tive Function district, when the total Water that parallel water pump provides still is greater than air conditioning terminal system institute water requirement, pass through unit number control, reduce the operation number of units of water pump, the operating flux of residue work each variable frequency pump is made to be positioned at high efficiency area of pump operation range of flow, when the variable frequency pump worked is one, water pump is allowed to be fallback at more small flow, to ensure that variable frequency pump is within the annual most of the time, is in efficient operation.
Further, in the plane coordinates system of flow Q, lift H, comprise H-Q-n1, H-Q-n2, H-Q-n3 and H-Q-n4 tetra-pipe system performance curves, pump head-rating curve wherein under H-Q-n1 design speed, H-Q-n2, H-Q-n3 and H-Q-n4 are the pump head-rating curve under different loads rotating speed, n1 is rotating speed under power frequency, and n2, n3, n4 are rotating speed under sub load frequency conversion operating mode, η-Q is pump efficiency-flow curve, and a point is operating point for design, and corresponding lift and flow are rated lift and design discharge, and corresponding pump efficiency is peak efficiency, when actual motion, flow is less than or equal to design discharge, keep system-head curve constant, pass through variable frequency adjustment, pump rotary speed is reduced, meet actual amount of water demand, pump rotary speed n4 < n3 < n2 < n1, corresponding running state point is respectively d, c, b, a point, corresponding flow, lift, efficiency is: Qd < Qc < Qb < Qa, Hd < Hc < Hb < Ha, η d < η c < η b < η a, wherein η c=0.85 η a.
In actual applications, air-conditioning system adopts water pump, main frame to connect one to one to the present embodiment, and wherein water pump 1, water pump 2 be the water pump of phase not lift, different flow.In order to ensure that system high efficiency runs, every platform water pump runs in efficient district, between the flow ensureing every platform water pump Qc-Qa in FIG.
Handpiece Water Chilling Units 1, 2 are different cold, the unit that vaporizer resistance is different, corresponding water pump is different flow, different lift, wherein each water lift of pump difference is the difference of each vaporizer resistance, by inquiry pump characteristic, determine the range of flow that water pump Effec-tive Function is corresponding, determine the range of flow of pump variable frequency regulating and controlling, under annual operating mode, according to air conditioning load situation of change, ensure the AA' in Fig. 1, BB', CC', pressure reduction between DD' etc. needs equal, priority acccess control pump capacity is within the scope of Effec-tive Function, when not meeting the demands, control water pump number of units again, realize the Effec-tive Function of air-conditioner water system.
With reference to Fig. 2, in plane right-angle coordinate, take H as the longitudinal axis, Q is that transverse axis sets up coordinate, and wherein R-HQ is pipe system performance curve, H-Q pump head-rating curve; Take η as the longitudinal axis, Q is that transverse axis sets up coordinate, and wherein η-Q is pump efficiency-flow curve.
Wherein, the intersections of complex curve of R-HQ and H-Q is a point, and a point is operating point for design.Corresponding lift and flow are rated lift and design discharge, and corresponding pump efficiency is peak efficiency; When actual motion, flow will be less than or equal to design discharge, and from η-Q curve, now, the efficiency of water pump will decline, and the power of water pump will increase, and pump energy consumption will increase.
With reference to Fig. 3, in the plane coordinates system of flow Q, lift H, comprise H-Q-n1, H-Q-n2, H-Q-n3 and H-Q-n4 tetra-pipe system performance curves, pump head-rating curve wherein under H-Q-n1 design speed, H-Q-n2, H-Q-n3 and H-Q-n4 are the pump head-rating curve under different loads rotating speed, n1 is rotating speed under power frequency, and n2, n3, n4 are rotating speed under sub load frequency conversion operating mode; η-Q is pump efficiency-flow curve (under different rotating speeds, η-Q curve can change, in the little situation of rotation speed change, by approximate constant consideration).A point is operating point for design, and corresponding lift and flow are rated lift and design discharge, and corresponding pump efficiency is peak efficiency, when actual motion, flow will be less than or equal to design discharge, keep system-head curve constant, pass through variable frequency adjustment, pump rotary speed is reduced, meet actual amount of water demand, pump rotary speed n4 < n3 < n2 < n1, corresponding running state point is respectively d, c, b, a point, corresponding flow, lift, efficiency is: Qd < Qc < Qb < Qa, Hd < Hc < Hb < Ha, η d < η c < η b < η a, wherein η c=0.85 η a.
The above; be only the present invention's preferably specific embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the scope that the present invention discloses; be equal to according to technological scheme of the present invention and inventive concept thereof and replace or change, all belonged to protection scope of the present invention.
Claims (5)
1. the different lift different flow Combined water pump structure of air-conditioning system, it is characterized in that: in the refrigeration end inlet opening of air-conditioning system, round-the-clock energy-saving water pump structure is set, described round-the-clock energy-saving water pump structure is composed in parallel by some water supply loops, each bar water supply loop is composed in series by a variable-frequency type water pump and a handpiece Water Chilling Units, the variable frequency pump of each water supply loop has different lift structures and different flow structures, the handpiece Water Chilling Units of each water supply loop is different cold, the unit that vaporizer resistance is different, formation has the different lift of multiple stage, the variable frequency pump parallel connection structure of different flow, the control end of described variable frequency pump parallel connection structure is connected with control structure, controlling each variable frequency pump by this control structure is operated within the scope of efficient district, to form the round-the-clock energy-saving water pump structure that the parallel connection of multiple stage different lift different flow variable frequency pump is formed.
2. the different lift different flow Combined water pump structure of air-conditioning system according to claim 1, it is characterized in that: described variable frequency pump is operated in efficient district scope, refer to that each variable frequency pump is operated in the operating mode of 85% of setting pump efficiency >=pumps design operating mode peak efficiency.
3. the different lift different flow Combined water pump structure of air-conditioning system according to claim 1, it is characterized in that: described round-the-clock energy-saving water pump structure is composed in parallel by four water supply loops, and every bar water supply loop is composed in series by a variable-frequency type water pump and a handpiece Water Chilling Units.
4. the air-conditioning system controlling method of different lift different flow Combined water pump structure, is characterized in that:
1) the round-the-clock energy-saving water pump structure that the parallel connection of multiple stage different lift different flow variable frequency pump is formed is set, in the plane coordinates system of flow Q, lift H, determine the pipe system performance curve R-HQ of air-conditioning system, pump head-rating curve H-Q, pump efficiency-flow curve η-Q, the lift that operating point for design a is corresponding and flow are rated lift and design discharge;
2) be high efficiency area of pump operation when being set in 85% of pump efficiency >=pumps design operating mode peak efficiency, the variable frequency pump controlling round-the-clock energy-saving water pump structure remains on efficient district and runs, the efficiency of variable frequency pump remains between η a-η c corresponding in pump efficiency-flow curve η-Q, the operating flux of described water pump is controlled between Qc-Qa corresponding in pump head-rating curve H-Q, to ensure that described variable frequency pump runs in efficient district simultaneously;
3) under the different operating mode of whole year operation, when all parallel connection frequency conversion water pumps are adjusted to the minimum discharge in Effec-tive Function district, when the total Water that parallel water pump provides still is greater than air conditioning terminal system institute water requirement, pass through unit number control, reduce the operation number of units of water pump, the operating flux of residue work each variable frequency pump is made to be positioned at high efficiency area of pump operation range of flow, when the variable frequency pump worked is one, water pump is allowed to be fallback at more small flow, to ensure that variable frequency pump is within the annual most of the time, is in efficient operation.
5. the air-conditioning system according to claim 4 controlling method of different lift different flow Combined water pump structure, it is characterized in that: comprise H-Q-n1, H-Q-n2, H-Q-n3 and H-Q-n4 tetra-pipe system performance curves in the plane coordinates system of flow Q, lift H, pump head-rating curve wherein under H-Q-n1 design speed, H-Q-n2, H-Q-n3 and H-Q-n4 are the pump head-rating curve under different loads rotating speed, n1 is rotating speed under power frequency, and n2, n3, n4 are rotating speed under sub load frequency conversion operating mode, η-Q is pump efficiency-flow curve, and a point is operating point for design, and corresponding lift and flow are rated lift and design discharge, and corresponding pump efficiency is peak efficiency, when actual motion, flow is less than or equal to design discharge, keep system-head curve constant, pass through variable frequency adjustment, pump rotary speed is reduced, meet actual amount of water demand, pump rotary speed n4 < n3 < n2 < n1, corresponding running state point is respectively d, c, b, a point, corresponding flow, lift, efficiency is: Qd < Qc < Qb < Qa, Hd < Hc < Hb < Ha, η d < η c < η b < η a, wherein η c=0.85 η a.
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| CN201510702593.0A CN105221385A (en) | 2015-10-22 | 2015-10-22 | Air-conditioning system different lift different flow Combined water pump structure and controlling method |
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| CN201510702593.0A CN105221385A (en) | 2015-10-22 | 2015-10-22 | Air-conditioning system different lift different flow Combined water pump structure and controlling method |
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| CN107328028A (en) * | 2017-08-01 | 2017-11-07 | 雅克设计有限公司 | A kind of pump selection method |
| CN114413458A (en) * | 2022-01-25 | 2022-04-29 | 清华大学 | Water pump parallel operation control method, device, equipment and medium for air-conditioning water system |
| CN114877421A (en) * | 2022-04-21 | 2022-08-09 | 珠海格力机电工程有限公司 | Air conditioning water system, control method and air conditioning unit |
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| CN107328028A (en) * | 2017-08-01 | 2017-11-07 | 雅克设计有限公司 | A kind of pump selection method |
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