Energy saving control system and energy saving control method used for central air conditioner cooling water system

Abstract

The invention discloses an energy saving control system and an energy saving control method used for a central air conditioner cooling water system. The method comprises the following steps that set rotating speeds of a cooling water pump and a cooling tower fan are combined to form a plurality of rotating speed combinations; the cooling water pump and the cooling tower fan are controlled to operate at each rotating speed combination; corresponding general power consumption is calculated; the rotating speed combination at which the general power consumption of the cooling water system is minimum is obtained; a load rate of a central air conditioner system and a current wet-bulb temperature are subjected to step length increasing and repetitive computation; a load rate and the rotating speed combination corresponding to the load rate are obtained; and the rotating speed combination is introduced to the control system, thereby controlling the operation of the cooling water pump and the cooling tower fan. When the wet-bulb temperature changes, the above control process is repeated by selecting the control law corresponding to the wet-bulb temperature, so that the energy consumption of the cooling water system is always kept at the optimum point, the maximum energy saving is realized, and the disadvantage that single equipment is higher in energy efficiency but an integrated system does not save the energy is overcome.

Description

technical field [0001] The invention belongs to the technical field of central air-conditioning energy-saving control, and relates to an energy-saving control system and method for a central air-conditioning cooling water system. Background technique [0002] With the continuous increase of public building area, the energy consumption of public buildings is also increasing. At present, the energy consumption of central air-conditioning accounts for more than 60% of the energy consumption of public buildings. Therefore, it is of great significance to reduce the energy consumption of central air-conditioning and build a conservation-oriented society. [0003] For a long time, although the variable flow energy saving scheme of the cooling water system can save the energy consumption of the cooling water pump and cooling tower fan, it may lead to an increase in the energy consumption of the chiller. Therefore, the energy saving research of the central air conditioning system ma...

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Problems solved by technology

[0009] In view of the above-mentioned problems in the prior art that the energy consumption of the cooling water system deviates from the optimal point and the overall energy consumption of the cooling water system is high, an object of the present invention is to provide an energy-saving control system based on the central air-conditioning cooling water system

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