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Group control method based on data center water chilling unit performance curve

A chiller and data center technology, applied in mechanical equipment, heating and ventilation control systems, heating and ventilation safety systems, etc., can solve the problems of no implementation plan and content, no further verification of energy saving, etc., and achieve a reasonable calculation load Effect

Active Publication Date: 2018-04-20
CHINA INFOMRAITON CONSULTING & DESIGNING INST CO LTD
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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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  • Group control method based on data center water chilling unit performance curve
  • Group control method based on data center water chilling unit performance curve
  • Group control method based on data center water chilling unit performance curve

Examples

Experimental program
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Effect test

Embodiment

[0105] Taking the air-conditioning system of Beijing Yizhuang Data Center 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 centralized air-conditioning According to the scale and progress of phased and batched construction, three centrifugal chillers with rated cooling capacity 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:

[0106] 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 relative humidity of 50% as an example, the sp...

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Abstract

The invention discloses a group control method based on a data center water chilling unit performance curve. The method is based on the curve of values of the coefficient of performance (COP) of a data center water chilling unit under special operating conditions, optimization calculation is conducted through curve fitting according to the actually measured COP values of the water chilling unit with partial loads, a favorable control scheme is found, the start-stop number and the load rate of the water chilling unit are controlled through the selected control scheme, thus, the water chilling unit works under the special operating conditions with high COP values, the working efficiency of the water chilling unit is 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 a group control method based on the performance curve of a chiller in a data center. Background technique [0002] At present, the control methods used in data center 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 data center air-conditioning group control technology is mainly used in chiller group control. There are many options for the control logic of adding and subtracting chillers. In the current energy-saving technology, the compressor operating current RLA (Rated Load Amps) and rated The method based on the ratio of current is relatively reliable and energy-saving. The main control idea is that when the system load increases, the control system will automatically compare ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/47F24F11/64F24F140/50F24F140/60
Inventor 黄毅杨军志张忠斌袁晓东张宏伟徐靖文李平安王久海高岳
Owner CHINA INFOMRAITON CONSULTING & DESIGNING INST CO LTD
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