Control method and device for chilled water secondary pump system
A control method and secondary pump technology, applied in refrigeration and liquefaction, refrigerators, refrigeration components, etc., can solve the problems of increasing power consumption, not considering changes in the characteristics of the secondary pump pipe network, and not improving theoretical support, etc. The effect of reducing energy consumption
Active Publication Date: 2019-01-15
BEIJING BAIDU NETCOM SCI & TECH CO LTD
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Problems solved by technology
[0003] In the prior art, the control method for the chilled water secondary pump system is to control the frequency of the secondary pump through the pressure difference, that is, the difference between the chilled water pressure at the water supply end and the return water end is used as the control variable, and by comparing the actual measured value The frequency of the secondary pump is controlled with the set value, and the number of secondary pumps operating is mainly determined by artificially judging the load. In this way, the adjustment of the number of secondary pumps operating in the chilled water secondary pump system is not perfect At the same time, in the process of adjusting the number of secondary pumps, only the operation of the secondary pump itself is paid attention to without considering the change of the characteristics of the pipe network where the secondary pump is located, resulting in the length of the secondary pump during actual operation. Working in the low-efficiency range of the characteristic curve for a long time makes the efficiency of the chilled water secondary pump system low and greatly increases power consumption
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[0022] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the related invention are shown in the drawings.
[0023] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.
[0024] refer to figure 1 , which shows a flow 100 of an embodiment of a control method for a chilled water secondary pump system according to the present application.
[0025] The chilled water secondary pump system includes a water supply end, a water return end, a pipelin...
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The application discloses a control method and device for a chilled water secondary pump system. A specific implementation of the method includes: collecting the flow of chilled water in the chilled water secondary pump system and the pressure value between the water supply end and the return water end; based on the water supply end and the return water The pressure value difference between the terminals, the flow rate and the preset first impedance of the chilled water secondary pump system determine the reference value of the number of secondary pumps in the operating state; based on the secondary pumps in the current operating state The quantity and the quantity reference value control the operation of at least one secondary pump in the chilled water secondary pump system. This embodiment effectively reduces the energy consumption of the chilled water secondary pump system.
Description
technical field [0001] The present application relates to the field of automatic control, in particular to a control method and device for a chilled water secondary pump system. Background technique [0002] With the rising cost of energy and the emphasis on green environmental protection, the demand for energy saving in data centers is becoming stronger and stronger. As a large energy consumer in large data centers, cooling water systems save and reduce the energy consumption of related equipment in the system, which is of great significance for the improvement of data center infrastructure efficiency and the reduction of power usage efficiency (Power Usage Effectiveness). [0003] In the prior art, the control method for the chilled water secondary pump system is to control the frequency of the secondary pump through the pressure difference, that is, the difference between the chilled water pressure at the water supply end and the return water end is used as the control va...
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IPC IPC(8): F25B49/00F25B41/00F25B41/40
CPCF25B41/00F25B49/00
Inventor 顾鹏黄民民苏少华
Owner BEIJING BAIDU NETCOM SCI & TECH CO LTD