Compressor variable frequency energy saving reforming method of constant speed centrifugal water cooling machine set

A technology for energy-saving transformation and chiller units, which is applied to refrigerators, refrigeration components, heating methods, etc., can solve the problems of high energy consumption, low energy efficiency, inability to achieve energy saving and economical operation of compressors, and achieve maintenance cost savings, life extension, Anti-shock effect

Inactive Publication Date: 2007-01-31
周锋
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the existing constant speed centrifugal water chiller has relatively low energy efficiency and excessive energy consumption of the compressor when it operates under partial load, and cannot realize energy saving and economical operation, the present invention provides a frequency conversion compressor of the constant speed centrifugal water chiller The device for energy-saving transformation, through the frequency conversion and speed regulation transformation of the compressor of the chiller, and at the same time optimizes the opening degree of the inlet guide vane, so that the unit is in the best operating state, thereby reducing the operating power of the unit when it is operating at part load, and realizing energy saving. and economic operation

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  • Compressor variable frequency energy saving reforming method of constant speed centrifugal water cooling machine set
  • Compressor variable frequency energy saving reforming method of constant speed centrifugal water cooling machine set

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Embodiment Construction

[0016] Carrier 19XR5555457DHS centrifugal chiller, the cooling capacity of the unit is 2461KW / 700 refrigeration tons, the compressor motor power is 472KW, the rated current is 817A, and the evaporator flow rate is 423M 3 / H, condenser flow 508M 3 / H, two refrigeration pumps 75KW, flow 500M 3 / H, two refrigeration pumps 55KW, flow 630M 3 / H, pump 1 is running in standby mode.

[0017] According to the investigation and analysis of the operation records of the unit in the past two years, when the chiller is at the maximum load, the temperature of the chilled water outlet and return water is 8°C to 11.5°C, the temperature of the cooling water inlet and outlet is 31°C to 35°C, and the current load rate of the compressor is 83. %, and most of the time throughout the year, the chilled water temperature difference is within 3°C, the average current load rate is 60%, and the unit operates under partial load, although it is possible to change the direction of gas entering the impelle...

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Abstract

This invention relates to a kind of constant speed centrifugal water chilling unit compressor conversion energy-saving reforming energy-saving. It collects the refrigeration outer water's temperature; the temperature set value, the refrigeration backwater's temperature, the refrigeration water's flux, the guide vane's jaw opening, the compressor's real rotate speed and parameter of the unit. Through the water chilling unit compressor conversion intelligence fuzzy control system, it optimizes the compressor's rotate speed and the guide vane's jaw opening. This can make the unit always in the best operation even on all kinds of work conditions especially on partly overload condition. At the same time it improves the compressor's efficiency and reduces the cooling unit's energy consumption for work. It saves the energy of central air condition water chilling unit and has economic operation; the result of save energy is above 30% every year.

Description

1. Technical field: [0001] The invention relates to a compressor frequency conversion energy-saving modification device for a central air-conditioning constant-speed centrifugal chiller unit, which is only aimed at the central air-conditioning constant-speed centrifugal unit, and performs frequency conversion energy-saving modification on the centrifugal compressor of the unit to reduce the operating power of the compressor and realize Energy-saving and economical operation of central air-conditioning chillers. 2. Background technology [0002] Since the compressor of the central air-conditioning constant-speed centrifugal chiller does not rule out the possibility of running for a long time under full load, the capacity of the compression motor can only be determined according to the maximum demand; in actual operation, the external load of the air-conditioning unit is often Frequently changing, the proportion of the time the unit is operating at part load is very high, so i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/00F25B49/02
Inventor 周锋
Owner 周锋
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