In this paper incomplete quantitative data has been dealt by using the concept of fuzzy entropy. Fuzzy entropy has been used to extrapolate the data pertaining to the compressor current. Certain attributes related to the compressor current have been considered. Test data of compressor current used in this knowledge discovery algorithm knows the entire attribute clearly. The developed algorithm ...

In any development, screw compressor has several prominent roles. One is its unavoidable application in infrastructure building of the road and railway networks, as well as in major housing developments. Other roles are introduction of new compressor manufacturing facilities and a consequential improvement of the existing compressor industry in which the screw compressor has a vital part as an ...

A single screw compressor is usually sealed by means of its tiny clearances. The theoretical research and the practice application shown that the leakage in the working process is always the key factor influencing the performance of this kind of compressor. Besides meeting the need of lubrication, the oil injection can greatly improve the sealing effect. It is obvious that the reduction of clea...

To ensure bearing reliability, it is traditional for compressor manufacturers to specify a minimum oil sump temperature difference above the saturated discharge temperature in a high-side compressor and suction temperature in a low-side compressor. This minimum oil sump temperature specification is, in essence, a surrogate measure of the minimum viscosity the compressor manufacturer reqtrires t...

It will bring about many problems for a Rl2 refrigerator compressor to use Rl34a as refrigerant directly, such as power increasing, capacity dropping, and noise rising up etc. In order to solve these problems, the mathematical model, optimization model and special test system were built up, many improvements were made by means of the calculating and the testing results. Finally, the performance...

The performance of air conditioner and the reliability of compressor could be reduced, if the refrigerant gas is discharged from compressor with excessive lubricating oil. Thus, the study of the reduction of the oil circulation rate in the compressor is required to resolve the problem. In this paper, five feasible approaches to decrease the oil circulation rate were confirmed by experiment. the...

The scroll wraps of a scroll compressor play a very important role in the compressor’s efficiency due to their impact on leakage and leakage irreversibilities. In this work, a short summary of the scroll compressor geometry is presented. Using the geometry of the scroll wraps, an optimal scroll wrap geometry is derived for a given set of constraints on compressor displacement, scroll wrap thick...

The 3D pyramid compressor project at the University of Glasgow has developed a compressor for images obtained from CLSM device. The proposed method using a combination of image pyramid coder and vector quantization techniques has good performance at compressing confocal volume image data. An experiment was conducted on several kinds of CLSM data using the presented compressor compared to other ...

A number of compressor design modifications to reduce the noise which are based on the modal characteristics of the compressor shell are discussed and special problems are pointed out. Most design changes exhibit effects across broad frequency regions and while reducing the noise in some frequency bands can cause noise increases in other bands. Shell damping was found to be a generally consiste...

The air conditioning and refrigeration systems noise consideration is continuously growing, implying more and more compressor noise measurements [1], even in-situ [2][3]. This article will introduce a new validated finite-element method to obtain the compressor noise from vibration measurements from standard test rig or directly in the field. We will describe the methodology; the devices & tool...