Control method of supply air temperature for variable air volume air conditioning system

Abstract

The embodiment of the invention provides an air supply temperature control method of a variable-air-volume air conditioning system. The air supply temperature control method includes the steps that actual air supply quantities of multiple terminal devices of the variable-air-volume air conditioning system are collected; the percentages of the actual air supply quantities accounting for the maximumdesigned air supply quantity are obtained; an area with the percentage being the minimum designed air supply quantity is determined as the area with the minimum load; the minimum designed air supplyquantity of the area with the minimum load is increased by one increment to form a set value of the air supply quantity; a set value of the air supply temperature is determined according to the set value of the air supply quantity; and the actual air supply temperature is controlled to be the set value of the air supply temperature. The air supply temperature is increased in an air handling unit,control over the air supply quantity of the area with the minimum load is separated from a forced minimum value, and thus there is no need of adopting an electric heating mode at the terminal devicesfor heating supplied air, and the energy saving effect is achieved under the condition of guaranteeing the indoor comfort.

Description

technical field [0001] Embodiments of the present invention relate to the field of temperature control, and in particular to a method for controlling the temperature of air supply in a variable air volume air conditioning system. Background technique [0002] The variable air volume system is an all-air air conditioning system that adjusts the indoor temperature by changing the air volume sent into the room. The variable air volume air conditioning system is composed of air handling unit, air supply system, terminal device and automatic control device, among which the terminal device is the key equipment of the variable air volume system. It can accept the instructions of the room temperature regulator and automatically adjust the air supply according to the room temperature. amount to meet the demand of indoor load. [0003] For variable air volume air conditioning systems, the usual control method is to adjust the cooling or heat delivery by changing the air supply volume...

AI Technical Summary

Problems solved by technology

Usually, the air supply volume is related to the valve position and static pressure, but there is no strict correspondence between the air supply volume and the valve position, that is, the air supply volume corresponding to the same valve position may be different, so the valve position cannot reflect the regional load. Therefore, it is impossible to effectively control the supply air temperature

For static pressure, the static pressure is usually changed according to the demand of the area with the largest load, so the change of static pressure cannot reflect the demand of the area with the least load

In addition, this method does not use the control algorithm of the feedback control principle, it is only the programmed expression of artificial experience

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