Judgment method and device for bypass operation of water chilling unit

Abstract

The invention discloses a judgment method and device for bypass operation of a water chilling unit. The method comprises the steps that the effective states of at least two water chilling machines in the water chilling unit within the preset effective time are determined according to the switching state, wherein the effective state comprises an effective opening state; the average water return temperature and the average water outlet temperature of the water chiller and the main pipe water outlet temperature of the water chiller unit in the effective starting state are obtained; according to the average water return temperature, the average water outlet temperature and the main pipe water outlet temperature of the water chilling unit, the bypass flow proportion is calculated; and the bypass state of the water chilling unit is judged according to the bypass flow proportion. According to the judgment method and device for bypass operation of the water chilling unit, the diagnosis accuracy of the bypass state is improved, the diagnosis cost is reduced, and the conditions that the efficiency of a refrigerator is low and energy consumption is wasted due to invalid bypass in operation are avoided.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of detection, and in particular to a method and device for judging the bypass operation of a chiller. Background technique [0002] For public building cooling stations, chillers account for a large proportion of energy consumption, so improving the operating efficiency of chillers can effectively reduce energy consumption. Among them, the bypass operation of the chiller is one of the important factors affecting the operation efficiency. The bypass of the chiller means that under the cooling condition, the valve of the closed chiller is not completely closed, resulting in water flow inside the closed chiller. By passing through, the water flow of the chiller in the turned-on state is reduced, resulting in a decrease in the operating efficiency of the chiller. [0003] The traditional method of identifying the bypass of chillers is to add a flow meter on each chiller. Under the cool...

AI Technical Summary

Problems solved by technology

Among them, the bypass operation of the chiller is one of the important factors affecting the operation efficiency. The bypass of the chiller means that under the cooling condition, the valve of the closed chiller is not completely closed, resulting in water flow inside the closed chiller. Passing, resulting in a reduction in the water flow of the chiller in the open state, resulting in a decrease in the operating efficiency of the chiller

[0003] The traditional method of identifying the bypass of chillers is to add a flow meter on each chiller. Under the cooling condition, it is judged whether there is a bypass operation by checking whether the flow meter on the chiller in the off state has flow data, but this The identification method needs to add a flow meter on the return water side and the water outlet side of each chiller, which increases the laying cost

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