Energy-saving automatic control system and control method for variable-parameter cooling tower group

Abstract

The invention provides an energy-saving automatic control system for a variable-parameter cooling tower group. The energy-saving automatic control system comprises a master controller, a meteorological station and a plurality of cooling towers. The meteorological station is arranged near the cooling towers and is used for detecting meteorological parameters of the environment; the cooling tower is provided with an electric power detection instrument used for detecting electric power parameters of a motor of the cooling tower; a temperature sensor and an electric two-way valve are arranged on a cooling water outlet path of the cooling tower, the temperature sensor is used for detecting the outlet water temperature of cooling water, and the electric two-way valve is used for connecting and disconnecting the cooling water outlet path; and the cooling tower, the electric power detection instrument, the temperature sensor, the electric two-way valve and the meteorological station are all in communication connection with the master controller. The invention further provides an energy-saving automatic control method for the variable-parameter cooling tower group. The method can greatly improve the operation efficiency, saves the power consumption of a host, and has huge energy-saving benefits. The social benefits of energy conservation, emission reduction and consumption reduction are obvious.

Description

technical field [0001] The invention relates to the technical field of central air-conditioning energy saving, in particular to an automatic energy-saving control system and control method for variable parameter cooling tower groups. Background technique [0002] The current cooling tower manufacturing standard for central air conditioning "GB7190.1-1997" 5.1.1 standard design conditions stipulates that when the wet bulb temperature is 28°C, the inlet water temperature is 37°C, the outlet water temperature is 32°C, and the cooling temperature difference is 5°C. It can be seen from the above that when the wet bulb temperature is 28°C, the outlet water temperature is 32°C, and the difference between the outlet water temperature and the wet bulb temperature is 4°C. However, according to the analysis of the annual operation data of the cooling tower in the actual project, the annual wet bulb temperature is not constant at 28°C. If it is, the maximum value is around 28°C, and the...

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Problems solved by technology

[0003] Because the traditional cooling tower fan control adopts the control technology of fixed temperature setting, and the constant cooling tower outlet water temperature is about 30-32 °C, it cannot make full use of the natural climate advantage when the outdoor wet bulb temperature is lower than 28 °C, which will make the cooling Insufficient utilization of tower cooling capacity reduces overall work efficiency

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