Refrigerating system cooling capacity control method and device, controller and refrigerating system

Abstract

The invention relates to a refrigerating system cooling capacity control method and device, a controller and a refrigerating system. The refrigerating system cooling capacity control method comprises the steps of obtaining the total cooling capacity of the refrigerating system; determining the target cooling capacity of each refrigerating host in the refrigerating system; determining a flow value of each refrigerating host according to the target cooling capacity of each refrigerating host; and according to the flow value of the refrigerating host, adjusting the frequency of a water pump corresponding to the refrigerating host, so that the actual cooling capacity of the refrigerating host can reach the target cooling capacity. The control method adopts a principle that according to the optimal energy efficiency of the refrigerating host, the frequency of the water pump corresponding to different refrigerating hosts is adjusted. Passive control over the cooling capacity of a single refrigerating host is achieved, so that the refrigerating system can accurately control cooling capacity output matching of different refrigerating hosts, and the overall energy efficiency of the refrigerating system reaches the highest.

Description

technical field [0001] The invention relates to the technical field of air conditioning and refrigeration, in particular to a method, device, controller and refrigeration system for controlling the cooling capacity of a refrigeration system. Background technique [0002] When the air conditioning system is cooling, the traditional technical solution is to determine the combined performance curve of the chiller with different load rates under the same pressure ratio based on the current cooling water inlet temperature, chilled outlet water temperature, and the pressure ratio of the main engine. Under the current load rate, turn on several hosts to share the cooling capacity demand together, and the energy efficiency of the unit can reach the highest. The traditional technical solution is only applicable to the situation where multiple hosts with the same cooling capacity are turned on at the same time. When there is a combination of large and small hosts in the refrigeration s...

AI Technical Summary

Problems solved by technology

[0002] When the air conditioning system is cooling, the traditional technical solution is to determine the combined performance curve of the chiller with different load rates under the same pressure ratio based on the current cooling water inlet temperature, chilled outlet water temperature, and the pressure ratio of the main engine. Under the current load rate, turn on several hosts to share the cooling capacity demand together, and the energy efficiency of the unit can reach the highest. The traditional technical solution is only applicable to the situation where multiple hosts with the same cooling capacity are turned on at the same time. When there is a combination of large and small hosts in the refrigeration system, When different host types are matched, the average cooling capacity cannot achieve the highest energy efficiency

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