Enhanced method for controlling a pumping station within a fluid circulation system, related circulation system and pumping station for realizing said method
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F04B-049/06
G05B-011/01
F04D-015/00
F04B-049/20
출원번호
US-0629564
(2015-02-24)
등록번호
US-9970433
(2018-05-15)
우선권정보
EP-14425018 (2014-02-25)
발명자
/ 주소
Marioni, Elio
출원인 / 주소
Taco Italia S.r.l.
대리인 / 주소
Akerman LLP
인용정보
피인용 횟수 :
0인용 특허 :
24
초록▼
Method for automatically controlling a pumping station of a fluid circulation system with flowrate control valves, comprising the following control steps which are cyclically repeated: (b) driving said pumping station in accordance with a set curve belonging to a group of predefined driving curves;
Method for automatically controlling a pumping station of a fluid circulation system with flowrate control valves, comprising the following control steps which are cyclically repeated: (b) driving said pumping station in accordance with a set curve belonging to a group of predefined driving curves; (c) monitoring over time the variation in flowrate of fluid circulating in the system at the pumping station, or a parameter related thereto; (d) if, during the monitoring step (c), the variation in flowrate exceeds or falls below a control threshold and if said condition is maintained for a stabilization time, (e) modifying the set driving curve, replacing it with another curve from the plurality of driving curves; and (f) reinitializing the monitoring step (c) from a new working point reached by the pumping station.
대표청구항▼
1. A method for automatically controlling a pumping station of a fluid circulation system provided with one or more flowrate control valves, comprising the following preliminary step: predefining a plurality of predefined driving curves which define relationships between head and flowrate of the pum
1. A method for automatically controlling a pumping station of a fluid circulation system provided with one or more flowrate control valves, comprising the following preliminary step: predefining a plurality of predefined driving curves which define relationships between head and flowrate of the pumping station, wherein said predefined driving curves are ordered with an increasing progression from a lower predefined driving curve to a higher predefined driving curve, each predefined driving curve in between them defining, along at least one section thereof, head values, for the same flowrate, higher than those of the predefined driving curve preceding it in the progression and, along at least one section thereof, head values, for the same flowrate, lower than those of the predefined driving curve following it in the progression;and the following adaptive control steps which are cyclically repeated:driving said pumping station in accordance with a set predefined curve chosen from among the predefined driving curves;monitoring over time the variation in flowrate of fluid circulating within the system at the pumping station, or a parameter related thereto, by calculating a ratio between power consumption and frequency of rotation of the pumping station, this ratio being indicative of the variation in flowrate;checking whether, during the monitoring step, the variation in flowrate exceeds or falls below a control threshold and whether said condition is maintained for a stabilization time, identifying in this case an increased flowrate condition or reduced flowrate condition, respectively;if, during this latter checking step, an increased flowrate condition or reduced flowrate condition is identified, modifying the set predefined driving curve, replacing it with another predefined curve from the plurality of predefined driving curves, said step of modifying the set predefined driving curve including the following substeps:if, during the last checking step, an increased flowrate condition has been identified, replacing the set predefined driving curve with a successive predefined driving curve, if any;if, during the last checking step, a reduced flowrate condition has been identified, replacing the set predefined driving curve with a preceding predefined driving curve, if any;when the step of modifying the set predefined driving curve is performed, reinitializing the monitoring step from a new flowrate working point reached by the pumping station. 2. The method according to claim 1, wherein the respectively successive and preceding predefined driving curves selected during the substep of replacing the set predefined driving curve are, respectively, the immediately successive and immediately preceding predefined driving curves in the progression with respect to the set predefined driving curve. 3. The method according to claim 1, further comprising the following adaptive control steps which are cyclically repeated: if a wait-time lapses without the set predefined driving curve being modified, modifying the predefined driving curve in accordance with one of the following alternative substeps:if, during the last modification of the set predefined driving curve, the previously set predefined driving curve has been replaced with a successive predefined driving curve which is currently set, replacing if possible the currently set predefined driving curve with a yet successive predefined driving curve;if, during the last modification of the set predefined driving curve, the previously set predefined driving curve has been replaced with a preceding predefined driving curve which is currently set, replacing if possible the currently set predefined driving curve with a yet preceding predefined driving curve. 4. The method according to claim 3, wherein said step of modifying the predefined driving curve when the wait time lapses further comprises the following substep, as an alternative to the preceding steps: if, from the time of activation of the adaptive control or from last starting of the system, no modifications of the set predefined driving curve have been performed, replacing the set predefined driving curve with a successive predefined driving curve. 5. The method according to claim 3, wherein the respectively successive and preceding predefined driving curves selected during the alternative substeps of the step for modifying the predefined driving curve when the wait time lapses are, respectively, the immediately successive and immediately preceding predefined driving curves in the progression with respect to the set predefined driving curve. 6. The method according to one of claim 3, further comprising the following step: when said step of modifying the predefined driving curve upon lapsing of the wait time is performed, incrementing the variable of the wait time by an additional time;when, during the identification step and check step, an increase or a reduction in the flowrate maintained over the time is identified, reinitializing the variable of the wait time to an initial value. 7. The method according to claim 1, further comprising an adaptive control step which is cyclically repeated, of: regulating operation in limit flowrate conditions, comprising the substeps of:identifying a limit flowrate condition, in which the working point of the pumping station is positioned on a limit characteristic curve of the said pumping station;if, during the preceding identification step, a limit flowrate condition is detected, checking whether said limit flowrate condition is maintained for a control time period;if, during the preceding check step, the limit flowrate condition is maintained, replacing the set predefined driving curve with the first predefined driving curve which is intercepted moving along the characteristic limit curve and decreasing the flowrate from the working point of the pumping station. 8. The method according to claim 1, wherein said predefined driving curves are proportional curves, namely linear curves increasing in the Q-H plane. 9. The method according to claim 8, wherein said predefined driving curves have an inclination progressively increasing along the x axis of the Q-H plane. 10. The method according to claim 1, wherein said parameter related to the variation in flowrate is a parameter obtained from a measurement inside the pumping station. 11. The method according to claim 10, wherein said pumping station comprises at least one circulator operated by a synchronous motor, said parameter related to the variation in flowrate being obtained from the power consumption and the rotational frequency of said synchronous motor. 12. The method according to claim 1, where the set predefined driving curve is reset to a default predefined driving curve whenever the adaptive control is started again. 13. A pumping station for a fluid circulation system, comprising one or more circulators and fitted with an electronic control device designed to implement the method according to claim 1. 14. A fluid circulation system provided with one or more flowrate control valves and a pumping station, said system further comprising at least one electronic control device designed to implement the method according to claim 1.
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