Cascade stage air conditioning system optimization control method based on energy consumption models of water chilling units

Abstract

The invention discloses a cascade stage air conditioning system optimization control method based on energy consumption models of water chilling units. The method comprises the following steps that related data of a cascade stage air conditioning refrigeration system are collected, and the ice melting amount and the unit maximum refrigerating load upper limit are estimated; energy consumption model modeling is carried out on a base-load water chilling unit and a double-working-condition water chilling unit in the cascade stage air conditioning refrigeration system by adopting a support vectorregression machine; the actual unit running quantity is calculated according to the estimated ice melting amount, the unit maximum refrigerating load upper limit and the load demand at the current moment, and the unit group control is achieved; the base-load water chilling unit, the double-working-condition water chilling unit and the ice melting amount load are distributed, parameter optimizationis achieved by combining with the energy consumption models of the units so as to enable the operation cost to be the lowest while the current load and boundary conditions are met; and the optimal updating period is set, and re-optimizing is carried out after each period is finished. According to the control method, the operation cost is the lowest while the current load and boundary conditions are met.

Description

technical field [0001] The invention belongs to the field of energy-saving optimization control of a central air-conditioning refrigeration system, in particular to a control method for realizing the ice-melting plan, unit group control and operation parameter optimization of the central air-conditioning refrigeration system. Background technique [0002] The central air-conditioning cascade refrigeration system is usually composed of a base-load chiller, a dual-mode chiller, and an ice storage tank. Due to the existence of three cold sources, a variety of operating modes can be combined in actual operation, with strong load adaptability, adjustable The characteristics of flexibility. However, too many operating modes make it difficult to select a system control scheme. Under the same load demand, different operating modes and schemes lead to differences in operating costs. Unreasonable operating modes will increase operating costs and even fail to meet the load demand. Thi...

AI Technical Summary

Problems solved by technology

However, too many operating modes make it difficult to select a system control scheme. Under the same load demand, different operating modes and schemes lead to differences in operating costs. Unreasonable operating modes will increase operating costs and even fail to meet the load demand.

This complex cascaded air-conditioning and refrigeration system usually has a large installed capacity, a large base of operating energy consumption, and a large room for energy saving.

[0003] In actual operation, due to the complex operating conditions of the cascade air-conditioning and refrigeration system, which involves the coordinated distribution of load among the base load unit, dual-working condition unit, and ice tank, the conventional unit group control strategy cannot realize the automatic operation of the system. Manual control by personnel based on previous operating experience can only guarantee the supply demand of the load, but does not really play the role of cascaded air-conditioning and refrigeration systems in shifting peaks and filling valleys, saving energy and reducing consumption

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