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Operating efficiency estimating device and method

A technology for operating efficiency and compressors, which is applied in the field of compressor control and can solve problems such as reduced operating efficiency of compressors

Inactive Publication Date: 2014-06-11
YAMATAKE HONEYWELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 estimating 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

The invention provides an operating efficiency estimating device and a method. A coefficient calculating portion (15) of the device uses data groups (14A) with overall flow (Qt) in reducing states as object data groups (Dt) and selects the m (=nX2) object data groups. Each object data group (Dt) is used for obtaining flow change rate (Lambda t), overall flow (Qt), electricity consumption (Wti) of each compressor (Ci) and representing flow change rate and operating efficiency of each compressor (Ci) to carry out an approximate liner function of an operating efficiency characteristic coefficient, namely intercept (ai) and slope (bi). Operating efficiency (Uxi) of each (Ci) is calculated in such a way that: firstly, a flow calculation formula related to each (Qt) of each of m Dts is produced; secondly, (ai) and (bi) are calculated in the way that flow calculation formulas are solved as simultaneous equations; and finally, an operating efficiency calculating portion (16) enables flow change rate (Lambda x) to be multiplied by (bi) of (Ci) and plus (ai).

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