Intelligent control method based on refrigeration performance curve

A refrigeration performance and intelligent control technology, applied in the direction of machinery and equipment, can solve the problems of energy saving without further verification, and without providing implementation plans and contents

Active Publication Date: 2018-06-15
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the patent does not provide a specific implementation plan and content, and there is no further verification of whether energy saving can be achieved, and further research and analysis are needed

Method used

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  • Intelligent control method based on refrigeration performance curve
  • Intelligent control method based on refrigeration performance curve
  • Intelligent control method based on refrigeration performance curve

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Embodiment

[0122] Taking the air-conditioning system of Beijing Yizhuang Refrigeration Project as an example, the project has a large installed capacity and high energy consumption. Considering the operating efficiency, operating period costs, energy saving and emission reduction, this project adopts water-cooled chillers as the central air-conditioning system. As for the cold source, according to the scale and progress of construction in stages and batches, three centrifugal chillers with rated cooling capacities of 4100kW, 2200kW and 1300kW are now equipped. The connection diagram of the cold water system is as follows: figure 1 : In the figure: 1-computer room; 2-confidential air conditioner and other equipment; 3-refrigerated return water; 4-refrigerated outlet water; 5-freezing station; 6-chiller; Cooling tower; 10-cold storage tank:

[0123] Taking the relationship between the combined load rate LR and COP value of the air conditioner at an ambient temperature of 5°C and a relativ...

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Abstract

The invention discloses an intelligent control method based on the refrigeration performance curve. On the basis of a COP performance coefficient value curve of a cold water unit under the specific condition, according to the actually-measured COP value of the cold water unit under part of loads, curve fitting is used for carrying out optimization calculation, and a favorable control scheme is found; according to the selected control scheme, the starting and stopping frequency and the load rate of the cold water unit can be controlled; the cold water unit works under the specific condition andhigher COP value, work efficiency of the cold water unit can be improved, and more energy is saved.

Description

technical field [0001] The invention belongs to the technical field of air conditioning and refrigeration, and in particular relates to an intelligent control method based on a refrigeration performance curve. Background technique [0002] At present, the control methods used in refrigeration and air-conditioning system chillers mainly include current percentage control, supply and return water temperature difference control, pressure difference control and flow control. At present, domestic and foreign refrigeration and air-conditioning group control technologies are mainly used in the group control of chillers. There are many options for the control logic of adding and subtracting chillers. In the current energy-saving technology, the operating current RLA (Rated Load Amps) of the compressor and the rated current The method based on the ratio is relatively reliable and energy-saving. The main control idea is that when the system load increases, the control system will aut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/63F24F11/46
Inventor 张忠斌张萌胡雨
Owner NANJING NORMAL UNIVERSITY
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