Cooling tower control method and system used for central air-conditioner system

Abstract

The invention discloses a cooling tower control method and system used for a central air-conditioner system, and relates to the field of refrigerating unit cooling water temperature control. The method comprises the following step: according to a preset testing method, acquiring a temperature difference value of a cooling water outlet temperature of cooling towers and an outdoor wet bulb temperature, according to a collected nature temperature and the temperature difference value, setting a preset temperature value, according to the preset temperature value, adjusting the wind speed of fans of the cooling towers, and controlling the cooling towers by adjusting the wind speed of the fans of the cooling towers. Refrigerating units give play to the maximum refrigerating capacity, the water outlet temperature of the cooling towers is reduced furthest, the efficiency of the refrigerating units is greatly improved, overall energy conservation and consumption reduction of a refrigerating station are achieved, and the overall refrigerating efficiency of the refrigerating station is improved.

Description

technical field [0001] The invention relates to the field of cooling water temperature control of refrigeration units, in particular to a cooling tower control method and system for a central air-conditioning system. Background technique [0002] In terms of refrigeration unit and cooling tower technology in the industry, whether it is one-to-one or parent control (the number of cooling towers that can be used is more than the number of operating refrigeration units), the cooling tower control method is based on the rated cooling water intake of the refrigeration unit used. Temperature Set a fixed temperature value, and control the speed of the cooling tower fan according to this fixed temperature value. This method cannot make full use of the good natural meteorological conditions, especially at the beginning and end of cooling, and at night and early morning. The cooling capacity directly determines the cooling capacity of the refrigeration unit, so that the refrigeration ...

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Problems solved by technology

[0002] In terms of refrigeration unit and cooling tower technology in the industry, whether it is one-to-one or parent control (the number of cooling towers that can be used is more than the number of operating refrigeration units), the cooling tower control method is based on the rated cooling water intake of the refrigeration unit used. Temperature Set a fixed temperature value, and control the speed of the cooling tower fan according to this fixed temperature value. This method cannot make full use of the good natural meteorological conditions, especially at the beginning and end of cooling, and at night and early morning. The cooling capacity directly determines the cooling capacity of the refrigeration unit, so that the refrigeration unit cannot exert the maximum cooling capacity. This method has certain limitations, extensiveness and poor economy for the overall energy efficiency control of the refrigeration room.

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