Method and device for controlling air conditioning system

Abstract

The invention provides a method and device for controlling an air conditioning system and relates to the technical field of air conditioners. The method includes the steps that the real-time sensible heat load and the real-time latent heat load of a building are acquired and the rated sensible heat and the rated latent heat of the tail end of the air conditioning system of the building are acquired; according to the real-time sensible heat load and the rated sensible heat, the sensible heat load percent of the real-time sensible heat load to the rated sensible heat is acquired; according to the real-time latent heat load and the rated latent heat, the latent heat load percent of the real-time latent heat load to the rated latent heat is acquired; according to the real-time sensible heat load percent and the real-time latent heat load percent, real-time chilled water boundary temperature is determined; according to the real-time chilled water boundary temperature, the chilled water average temperature of the air conditioning system is adjusted, so that the chilled water average temperature is smaller than or equal to the real-time chilled water boundary temperature. According to the method and device, the problems that the refrigeration capacity and the dehumidification capacity of the air conditioning system are affected and energy consumption is large due to an existing control strategy of the air conditioning system can be solved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a control method and device for an air conditioning system. Background technique [0002] At present, the preset chilled water outlet temperature of a central air conditioner with a chilled water system is generally 7°C, and the preset return water temperature is 12°C. In this case, the average temperature of the chilled water is 9.5°C. The average temperature of the chilled water can guarantee Refrigeration and dehumidification requirements under design conditions. At present, most central air-conditioning systems keep the chilled water outlet temperature at 7°C during actual operation, and the chilled water flow rate also remains constant. In this control mode, when the air-conditioning system is partially loaded, the return water temperature may be low. At the preset return water temperature of 12°C, for example, only 9 to 10°C, the average temperature of the chilled...

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Problems solved by technology

[0005] Embodiments of the present invention provide a control method and device for an air-conditioning system to solve the problems affecting the cooling and dehumidification capabilities of the air-conditioning system caused by the current strategy of adjusting the flow of chilled water and the strategy of increasing the outlet water temperature of the refrigeration unit of the air-conditioning system. And it can solve the problem of cooling and dehumidification under the design conditions under the design load for a long time, which will cause the room to be too cold and consume a lot of energy

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