Transversal waves in a reciprocating compressor

Steinrück, Herbert; Aigner, Roland; Machu, Gunther

doi:10.1007/s00707-008-0061-3

Cited by 5 publications

(7 citation statements)

References 6 publications

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“…Moreover the losses through the valve are increased, reducing the overall efficiency. However, when the piston velocity is small compared to the velocity of sound in particular environment and the motion is sufficiently smooth the state of the gas in cylinder can be described by quasistatic change of state -0D model [9]. Nevertheless, the waves initiated by valves could be still present, especially with compressing heavy gases in fast running compressors.…”

Section: Pressure Waves In the Cylindermentioning

confidence: 99%

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Modelling fluid flow in a reciprocating compressor

Tuhovčák

Hejčík

Jícha

2015

EPJ Web of Conferences

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Abstract. Efficiency of reciprocating compressor is strongly dependent on the valves characteristics, which affects the flow through the suction and discharge line. Understanding the phenomenon inside the compressor is necessary step in development process. Commercial CFD tools offer wide capabilities to simulate the flow inside the reciprocating compressor, however they are too complicated in terms of computational time and mesh creation. Several parameters describing compressor could be therefore examined without the CFD analysis, such is valve characteristic, flow through the cycle and heat transfer. The aim of this paper is to show a numerical tool for reciprocating compressor based on the energy balance through the cycle, which provides valve characteristics, flow through the cycle and heat losses from the cylinder. Spring-damping-mass model was used for the valve description. Boundary conditions were extracted from the performance test of 4-cylinder semihermetic compressor and numerical tool validation was performed with indicated p-V diagram comparison.

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Section: Pressure Waves In the Cylindermentioning

confidence: 99%

“…Nevertheless, the waves initiated by valves could be still present, especially with compressing heavy gases in fast running compressors. Therefore Steinrueck [9] introduced dimensionless classification number İ as a ratio of characteristic time scales.…”

Section: Pressure Waves In the Cylindermentioning

confidence: 99%

Modelling fluid flow in a reciprocating compressor

Tuhovčák

Hejčík

Jícha

2015

EPJ Web of Conferences

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“…Pereira [16] presented a three-dimensional numerical model for the analysis of small reciprocating compressors employed for household refrigeration purpose, taking into account the flow in the cylinder and through valves, as well as suction and discharge mufflers. Steinrück [17] established three different models (one-, two-, three-dimensional) to analyze the interaction between internal waves and the dynamics of passive plate valves, and meanwhile, the application range for each model was clearly pointed out.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on valve impact velocity and inclining motion of a reciprocating compressor

Xue

Feng

et al. 2013

Applied Thermal Engineering

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“…To date, the most important and efficient methods for reciprocating compressor stepless capacity control are as follows [1].…”

Section: Introductionmentioning

confidence: 99%

“…The influence of capacity reduction on compressor operation parameters has been studied in references [1] and [10], but a detailed theoretical analysis of the thermal cycle in the case of stepless capacity regulation has not been made until now. The next sections will analyse and discuss the details involving a reciprocating compressor under the situation of a stepless capacity regulation system.…”

Section: Introductionmentioning

confidence: 99%

Theoretical analysis and realization of stepless capacity regulation for reciprocating compressors

Hong

Jin

et al. 2009

Proceedings of the Institution of Mechanical Engineers, Part E:

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The present article focuses on a stepless capacity regulation system for reciprocating compressors in the capacity range between 0 and 100 per cent. This system is based on the socalled reverse flow regulation principle. The principle works by reversing part of the total gas that has been taken into the cylinder by conveying it back to the suction chamber by holding the suction valve open for a controlled and variable proportion of the compression stroke. Therefore the discharge capacity and power reduction are virtually proportional. In this study, the thermal cycle of reciprocating compressors in the case of stepless capacity regulation is analysed. The theoretical model of the thermodynamics cycle is first established. The relationship between the variation of the capacity and the opening time of the suction valve in a compression stroke can be obtained. Based on this approach, a new stepless capacity regulation system is designed, which consists of a hydraulic unit, a distributor, an unloader, and a control system. The resulting system is applied to a type 3L-10/8 reciprocating compressor to demonstrate its effectiveness. The experimental results show that the capacity of the compressor can be regulated steplessly, and the energy consumption is reduced proportionally with respect to the reduction in the capacity.

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Transversal waves in a reciprocating compressor

Cited by 5 publications

References 6 publications

Modelling fluid flow in a reciprocating compressor

Modelling fluid flow in a reciprocating compressor

Experimental investigation on valve impact velocity and inclining motion of a reciprocating compressor

Theoretical analysis and realization of stepless capacity regulation for reciprocating compressors

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