Energy-saving control system and control method of central air conditioning freezing station

Abstract

The invention relates to an energy-saving control system and control method of a central air conditioning freezing station. The control system is an energy conservation system with a self-learning function, and comprises a relational database, an energy consumption self-optimization controller, a rolling optimization controller, a signal acquisition control cabinet, a cooling tower control cabinet, a cooling pump control cabinet, a refrigeration pump control cabinet, and a plurality of sensors. Through relational database modeling for each main current consuming device in the central air conditioning freezing station and rolling optimization of the relational database, energy consumption associated information of each main current consuming device is obtained, and through further energy consumption self-optimization course, an optimization parameter of the operation of devices in the freezing station is obtained, thus the integral central air conditioning freezing station operates at a high-efficient and energy-saving state.

Description

Technical field: [0001] The invention belongs to the technical field of central air-conditioning control, and in particular relates to an energy-saving control system and a control method for a central air-conditioning refrigeration station. Background technique: [0002] In recent years, the development of low-carbon economy has become a social hot spot. Building energy conservation has received unprecedented attention, and central air-conditioning energy consumption accounts for a large proportion of the entire building energy consumption. Therefore, how to reduce the energy consumption of central air-conditioning systems has become an important issue. research topic. [0003] In the central air-conditioning refrigeration station system, the frequency conversion energy-saving technology of the water pump has been widely used at present. As a kind of centrifugal equipment, the power consumption of the water pump is proportional to the cube of the speed. The energy consumpt...

AI Technical Summary

Problems solved by technology

In view of the problems of easy oscillation and poor stability in PID control, some improved PID control methods and fuzzy control have also been applied to the control of central air-conditioning and refrigeration stations

[0006] However, one of the main problems of these control technologies is that they only focus on the energy saving of a single device or a small local system in the central air-conditioning refrigeration station, without considering the overall energy saving of the system, so the energy saving effect is limited, and sometimes there will be some equipment energy saving. , and affect the energy consumption of other equipment, which may eventually lead to an overall negative benefit result

For example, only focus on the power saving of water pumps, ignoring the increase in system energy consumption caused by the possible increase in energy consumption of chillers; the control of chilled water circulation and cooling water circulation is relatively independent, and comprehensive optimization control of system efficiency cannot be realized

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