Title:
WATER PUMP UNIT POWER-SAVING OPTIMIZED OPERATION METHOD AND SWITCH POINT DETERMINATION METHOD
Document Type and Number:
WIPO Patent Application WO/2021/088620
Kind Code:
A1
Abstract:
Provided are a water pump unit power-saving optimized operation method and switch point determination method. In parallel pump units, k water pumps of the same model equipped with frequency converters constitute a sub-pump unit A; using a constant-pressure operation mode, the water output Q1 of the first pump in the sub-pump unit A and a frequency converter input power P1 corresponding to Q1 and a frequency converter operating frequency f1 corresponding to Q1 are recorded, wherein QA = Q1 and PA = P1, to obtain a QA - PA curve of one operating water pump as an operating curve w1; taking QA = mQ1 and PA = mP1, m being a positive integer and k ≥ m ≥ 2, the operating curve wm of m running water pumps running at the same frequency, f1 = f2 = ... = fm is obtained; the point of intersection of the operating curve wm
-1 and the operating curve wm is the optimal switch point between m-1 operating water pumps and m operating water pumps under constant pressure Hs. According to these optimal switch points, the number of pumps is switched and the speed is controlled, ensuring that the sub-pump unit A operates in a high-efficiency state.
More Like This:
Inventors:
YAO FULAI (CN)
Application Number:
PCT/CN2020/121509
Publication Date:
May 14, 2021
Filing Date:
October 16, 2020
Export Citation:
Assignee:
YAO FULAI (CN)
International Classes:
F04B49/06
Foreign References:
| CN110939560A | 2020-03-31 | |||
| CN101509680A | 2009-08-19 | |||
| JPS59105983A | 1984-06-19 | |||
| CN109595746A | 2019-04-09 | |||
| CN107305055A | 2017-10-31 | |||
| TWI273171B | 2007-02-11 |
Other References:
YAO FULAI: "Efficiency Optimization Method and Optimal Control of Mechanical and Electrical Equipments", ELECTRONIC TECHNOLOGY & INFORMATION SCIENCE, CHINA DOCTORAL DISSERTATIONS FULL-TEXT DATABASE, 1 June 2012 (2012-06-01), XP055809944
YAO FULAI ; SUN HEXU: "Optimal method of the system composed of two different devices", CONTROL CONFERENCE (CCC), 2012 31ST CHINESE, IEEE, 25 July 2012 (2012-07-25), pages 2411 - 2415, XP032288773, ISBN: 978-1-4673-2581-3
YAO FULAI ; SUN HEXU: "Optimal method of the system composed of two different devices", CONTROL CONFERENCE (CCC), 2012 31ST CHINESE, IEEE, 25 July 2012 (2012-07-25), pages 2411 - 2415, XP032288773, ISBN: 978-1-4673-2581-3
Attorney, Agent or Firm:
BEIJING GAOWO LAW FIRM (CN)
Download PDF: