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Energy regulation control method of dual-system screw type water chilling unit

A chiller, energy regulation technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of high failure rate, low failure rate, high energy consumption, achieve high energy efficiency ratio, reduce working energy consumption, extend the The effect of unit life

Inactive Publication Date: 2011-02-16
四川长虹空调有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of high failure rate and high energy consumption of the existing dual-system screw chiller energy regulation control method, the technical problem to be solved by the present invention is to provide a low failure rate and energy-saving dual-system screw chiller energy regulation control method

Method used

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  • Energy regulation control method of dual-system screw type water chilling unit
  • Energy regulation control method of dual-system screw type water chilling unit
  • Energy regulation control method of dual-system screw type water chilling unit

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Embodiment

[0023] The invention is applied to a double-system screw-type water-cooling unit.

[0024] When the unit is started, select the screw compressor with the least running time as the main engine, or when the two running times are equal, the screw compressor No. 1 is defaulted as the main engine; at the same time, before or immediately after this, turn on the cold water pump and the chilled water pump , to detect whether the two pumps have flow, if not, turn to fault treatment and stop, if there is, start the main engine to full load and then start the auxiliary machine to full load, the start-up phase control ends and then enters the operation control phase, in this phase, according to The control period set by the system, at the end of each control period, calculates the difference between the measured temperature and the set temperature, that is, the loading temperature difference, and determines the energy demand of the unit according to the loading temperature difference. The ...

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Abstract

The invention discloses an energy adjusting and controlling method with low failure rate and saved energy for a double-system screw chiller unit, which comprises a starting stage control and an operation stage control for setting up the control cycle. In the operation stage control, two screw compressors are in a 75 percent or 100 percent operating state or in a standby state. In the operation stage, an energy demand of the double-system screw chiller unit is adjusted according to the difference between the measured temperature and the set temperature. When screw compressors are in a 75 percent or 100 percent operating state, the lubrication is sufficient and the energy efficiency ratio is high so as to solve the failure problems arising from the long operation of single screw compressor in a 25 percent or 50 percent operating state, reduce the working energy consumption, improve the working stability of the double-system screw chiller unit, prolong the service life of the double-system screw chiller unit and reduce the operation and maintenance cost of the double-system screw chiller unit. Though reducing the number of adjusting levels, the energy adjusting and controlling methodcan still ensure the temperature controlling precision and meet the needs of the users, which is particularly suitable for the double-system screw chiller unit.

Description

technical field [0001] The invention relates to an operation control method of a central air-conditioning unit, in particular to an energy regulation control method of a double-system screw type chiller. Background technique [0002] At present, in the central air-conditioning system, most of the dual-system screw chillers including two screw compressors use eight-stage energy regulation to achieve temperature regulation. The two screw compressors are No. 1 screw compressor and No. 2 screw compressor. For screw compressors, a single screw compressor has four energy adjustment gears of 25%, 50%, 75% and 100%. In the start-up control stage, the entire unit is gradually loaded after starting, from 1 / 8, 1 / 4, 3 / 8, 1 / 2, 5 / 8, 3 / 4, 7 / 8 until full load. In the operation control stage, according to the measured temperature and the set temperature, the energy regulation of the unit is carried out periodically. At present, only 25%, 50%, and 75% energy adjustment gears of one of the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B49/02
Inventor 李波刘运中
Owner 四川长虹空调有限公司
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