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Variable-number control method of water chilling units and water pumps for parallel chilled water system

A chilled water system and water-cooled unit technology, applied in the direction of pump control, pumps, pump devices, etc., can solve problems such as overloading, and achieve the effect of ensuring stable operation and avoiding overloading

Active Publication Date: 2020-10-30
SHANGHAI TANSUO ENERGY ENVIRONMENTAL SERVICES CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The invention provides a method for controlling the variable number of water-cooling units and water pumps used in parallel cooling water systems, which solves the problems of easy overload and other problems in the process of adjusting the number of existing chillers.

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  • Variable-number control method of water chilling units and water pumps for parallel chilled water system
  • Variable-number control method of water chilling units and water pumps for parallel chilled water system
  • Variable-number control method of water chilling units and water pumps for parallel chilled water system

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Embodiment Construction

[0018] In order to make the purpose, technical solution and advantages of the present invention more clear and complete, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0019] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0020] like figure 1 and 2 As shown, the present invention provides a method for controlling the variable number of water-cooled units and water pumps used in a parallel chilled water system, which is applied to the working condition of te...

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Abstract

The invention belongs to the technical field of adjustment and control of a central air conditioner and discloses a variable-number control method of water chilling units and water pumps for a parallel chilled water system. The variable-number control method of the water chilling units and the water pumps for the parallel chilled water system is applied to the work condition that the tail load isreduced, the operating number m of the water chilling units and the water pumps needed after the tail load changes is calculated, in combination with the operating number m of the water chilling unitsand the water pumps needed before the tail load changes, the maximum flow Q<max> of water passing through a single water pump in the change process of the number of the operating water pumps is determined, whether the maximum flow Q<max> exceeds the operation-allowed passing maximum flow of a single water pump or not is judged, if yes, the finally needed number is determined through a step-by-step reduction rule; and if not, the finally needed number is the m.

Description

technical field [0001] The invention relates to the technical field of central air-conditioning control, in particular to a method for controlling the variable number of water cooling units and water pumps used in a parallel cooling water system. Background technique [0002] At present, large and medium-sized refrigeration station systems still widely use the variable number control method to adjust the system load. Compared with variable speed regulation, it not only has the advantages of simple control management and low investment costs, but also can meet the end load requirements. , while keeping the chiller running at a more efficient working condition, but in the process of adjusting the number of chillers, changes in system piping characteristics often lead to overloading of the water pump corresponding to the chiller in a short period of time, affecting the system Stablize. Contents of the invention [0003] The invention provides a method for controlling the var...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B49/00F04B23/04
CPCF04B49/00F04B23/04Y02B30/70
Inventor 周旭辉
Owner SHANGHAI TANSUO ENERGY ENVIRONMENTAL SERVICES CO LTD
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