This paper deals with generalized approach to the reciprocating piston compressor driven by oscillating electrical motor and possibilities of development of new structures of the device. The current term linear compressor, ipso facto, restricts the considered devices only with a linear motion of the piston. Therefore the more general term oscillating motor-compressors is used in the paper, in w...

This study adopts the centrifugal compressor system which produces the nitric acid equipment in China Petrochemical Development Corporation’s Plant. The system is non-linear and its manufacturing process is changeable, which the traditional PID (Proportional-Integral-Differential) control method is difficult to apply. This study is intended to apply the artificial neural network method to test ...

The purpose of this paper is to introduce the development of a unique compressor capacity modulation concept which utilizes reexpansion volume as a means of capacity reduction in hermetic air conditioning and refrigeration system. While there are various methods of compressor capacity modulation in use, each particular method is limited in its application or appeal for different reasons such as...

HVAC compressor units are major energy consumers in both residential and commercial buildings today. Faulty and energy wasting operation of these units often goes unnoticed due to the corrective action of feedback control. Power system monitoring is an exciting approach for creating inexpensive, highly capable methods to monitor compressor unit performance. In this paper we develop a method to ...

R & D Laboratories, DAIKIN INDUSTRIES,LTD. Sakai,Osaka,Japan This paper refers to an improvement of the lubrication in a rolling piston type rotary compressor. The lubrication conditions of lubricated surfaces are examined in running compressor and some parameters of them are numerically analyzed. It is elucidated from the investigation that,when unfavorable condition occurs,the metallic contac...

In recent years a number of mathematical models have been developed which simulate reciprocating compressor performance a·nd valve behaviour, Such a model (4), has been used with a 'complex' optimisation procedure to optimise the design of spring loaded ring plate valves in a reciprocating air compressor. Features of the procedure are discussed, such as the handling of constraints, the sensitiv...

A load stand has been built and used to det ermine the performance of an open type reciprocating r efrigeration compressor over a range of speeds. The load stand and instrumentation are desc ribed and sample test readings are given. Measured perform ance characteristics for the compressor over a range of speeds are p resented. Aspects of the load stand are discussed and conclusion s are drawn f...

Typical automotive air conditioning refrigeration systems employ thermostatic expansion valve or orifice tube controls in a single stage refrigerant circuit. A new automotive air conditioning compressor has been developed that has a two stage compression process, which makes designing and producing a two stage refrigerant circuit more practical. Since this compressor can function in a single st...

April 10-15, 2016 Abstract A whole-annulus unsteady numerical simulation is carried out to investigate the mechanism of the rotating stall in a 1.5-stage low-speed axial-compressor. By comparing the experimental and numerical results, the numerical results are validated. The numerical simulation captures the most features of the rotating stall of the 1.5-stage compressor observed from the exper...

The compression-absorption heat pump (C-A HP), one of the promising heat recovery equipments that make process hot water using low temperature heat of wastewater, was evaluated by computer simulation. A simulation program was developed based on the continuity and the first and second laws of thermodynamics. Both the absorber and desorber were modeled using UA-LMTD method. In order to prevent an...