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Operating efficiency estimation device and method

A technology of operating efficiency and compressor, applied in the field of compressor control, can solve problems such as reducing the operating efficiency of the compressor

Inactive Publication Date: 2017-03-01
YAMATAKE HONEYWELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In addition, since the operating efficiency of the compressor decreases not only according to the operating conditions, but also due to changes in the compressor over time, periodic maintenance is required.

Method used

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  • Operating efficiency estimation device and method
  • Operating efficiency estimation device and method

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Embodiment Construction

[0034] [Principle of invention]

[0035] First, the principle of the present invention will be described.

[0036] In a compressed air supply system in which n (n is an integer greater than 2) compressors C1~Cn operate in parallel, the operating efficiency of each compressor C1~Cn is observed and analyzed separately using the existing method, and it is found that in a certain There is a tendency for operating efficiency to decrease within a certain period of time. Also, a more detailed analysis of the relationship between air flow and operating efficiency revealed that operating efficiency also decreases during periods of reduced air flow.

[0037] figure 2 It is a graph showing the operating efficiency characteristics depending on the flow rate change rate of the air flow rate. Here, the horizontal axis represents the change rate λ [%] of the air flow rate, and the vertical axis represents the operating efficiency Ui [m3 / kWh] of the compressor Ci (i = an integer from 1 to...

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Abstract

PROBLEM TO BE SOLVED: To easily estimate the operation efficiency of an individual compressor without the necessity for adding equipment to each compressor.SOLUTION: A coefficient calculation part 15 selects m pieces (=n×2) of data groups as data groups in which a total flow rate Qt is in a decrease state as data groups from data groups 14A; creates m pieces of flow rate calculation formulae related to the Qt for each Dt by using a flow rate change rate λt obtained for each Dt, a power usage Wti for each Qt and a compressor Ci, and a segment of a primary function for approximating a relationship between the flow rate change rate and the operation efficiency of the compressor Ci for each compressor Ci, and operation efficiency characteristic coefficients ai and bi indicating inclinations; and solves these flow rate formulae as simultaneous equations to calculate the ai and bi. An operation efficiency calculation part 16 multiplies the flow rate change rate λx of an arbitrary time x by the bi of the Ci and adds ai thereto, so as to calculate the operation efficiency Uxi of the Ci.

Description

technical field [0001] The present invention relates to a compressor control technique, and more particularly to an operation efficiency estimation technique for estimating the operation efficiency of each of a plurality of compressors operating in parallel. Background technique [0002] In factories and other facilities, a compressed air supply system using multiple compressors is installed, and these compressors are operated in parallel to compress air (or a mixed gas such as refrigerant) separately, and the resulting compressed air is temporarily collected in a tank After neutralization, supply is distributed from the mains to each load of the facility. [0003] The electric energy consumed by this compressed air supply system occupies a large proportion in the electric energy consumed by the whole equipment. Therefore, in consideration of energy saving and low carbon of equipment, it is necessary to seek energy saving and low carbon of the compressed air supply system, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F15/04
Inventor 黑泽敬山口幸博大浦肇
Owner YAMATAKE HONEYWELL CO LTD