Performance Comparison of Capacity Control Methods for Reciprocating Compressors

Wang, L; Liu, G B; Zhao, Yuanyang; Li, L L

doi:10.1088/1757-899x/90/1/012029

Cited by 8 publications

(5 citation statements)

References 4 publications

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“…Other capacity control methods include clearance pocket and suction throttling [98][99][100][101], but the literature available on these topics is limited. Table 5 presents a comparison of different capacity control methods.…”

Section: Capacity Controlmentioning

confidence: 99%

A Literature Review of the Positive Displacement Compressor: Current Challenges and Future Opportunities

Lu,

Sultan,

Phung

2023

Energies

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Positive displacement compressors are essential in many engineering systems, from domestic to industrial applications. Many studies have been devoted to providing more insights into the workings and proposing solutions for performance improvements of these machines. This study aims to present a systematic review of published research on positive displacement compressors of various geometrical structures. This paper discusses the literature on compressor topics, including leakage, heat transfer, friction and lubrication, valve dynamics, port characteristics, and capacity control strategies. Moreover, the current status of the application of machine learning methods in positive displacement compressors is also discussed. The challenges and opportunities for future work are presented at the end of the paper.

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Section: Capacity Controlmentioning

confidence: 99%

A Literature Review of the Positive Displacement Compressor: Current Challenges and Future Opportunities

Lu,

Sultan,

Phung

2023

Energies

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“…If the pressure in streams S6 and S12 rises slightly from a sudden reduction in the gas flowrate in the ME-GI engines or from slow action of the JTV, the pressure is first adjusted by the bypass valve as shown in Figure 3. The bypass valve serves to adjust the discharge pressure of the BOG compressors using a multi-controller (UC) acting as a low selector either by the upstream pressure or by the downstream pressure [25,26]. The bypass valves 1 and 2 between the upstream and downstream of the 5th compressors are set to 300 bar in Figure 2.…”

Section: Case A: Typical Fuel Gas Supply System (Fgss) With Full Re-liquefaction System (Frs)mentioning

confidence: 99%

A Novel Control Strategy on Stable Operation of Fuel Gas Supply System and Re-Liquefaction System for LNG Carriers

Hwang

Jung

2021

Energies

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Liquefied natural gas has attracted attention through an explosive increase in demands and environmental requirements. During this period, the Energy Efficiency Design Index (EEDI), which was adopted by the International Maritime Organization, expecting to significantly reduce CO2 from ships, has become an important key. It has triggered a change in use from steam turbine systems and dual fuel diesel electrics to high-efficiency main engines such as ME-GI engines to meet the EEDI requirements. However, since the ME-GI engines use 300 bar of fuel gas pressure, it is necessary to resolve problems of the pressure controllability and to prevent the reductions of the re-liquefaction amount caused by clogging of the lubricant mixed with the fuel gas during the compression. The purpose of this study is to propose a novel control strategy with a newly developed configuration for controlling the pressure so as not to trip the BOG compressors when the ME-GI engines are tripped, and for preventing a reduction on re-liquefaction amount. Unlike the typical configuration used in the current vessels, this proposal separately provides the fuel gas at 150 bar without lubricants to the re-liquefaction. In addition, three control strategies are proposed, depending upon the application of multi-controllers and the location of the pressure transmitters. A simulation was conducted to verify the efficacy of the proposed method, focusing on the controllability of the pressure and the re-liquefaction amount, in comparison with the typical configuration. As results of the simulation, the proposal showed excellent controllability without trips of the BOG compressors even in abnormal conditions and confirmed the great re-liquefaction performance.

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“…q(Σ else ) = 0 (15) where, Ω represents the volume, Σ represents the surface, q represents the heat flux.…”

Section: Boundary Conditions and Initial Conditionsmentioning

confidence: 99%

“…Jin et al considered the dynamic thermal cycle of the valve and established the dynamic model of the valve of a reciprocating compressor under a capacity control system based on the l-k actual gas state equation [14]. Wang et al conducted a simulation study on different capacity control methods to compare the compressor shaft power and mechanical efficiency, which was conducive to the optimal design of capacity control system [15]. Xu et al studied the dynamic characteristics of a reciprocating compressor with capacity control system.…”

Section: Introductionmentioning

confidence: 99%

Optimization Design of Actuator Parameters with Stepless Capacity Control System Considering the Effect of Backflow Clearance

Zhang¹,

Zhou

Jiang

et al. 2020

Applied Sciences

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The actuator is the key to the stepless capacity control system of a reciprocating compressor. The coupling effect between the actuator and the reciprocating compressor was not considered in the traditional design, and the large design margin led to low system reliability, high cost and low safety. In this paper, a reciprocating compressor and actuator were taken as research objects. The backflow clearance of the suction valve was simulated by CFD (computational fluid dynamics), The relationship between backflow clearance and resultant gas force of the valve plate was discussed. By building a mathematical model of actuators considering backflow clearance and impact rebound, the relationship between the parameters of actuators was studied. Based on the mathematical model and CFD analysis, the hydraulic force and spring stiffness were taken as the design variables, the impact velocity of ejection or withdrawal and the backflow clearance were taken as objective functions, and the actuator parameters were optimized with NSGA-II (Non-dominated Sorting Genetic Algorithm – II). The optimization results show that when the backflow clearance is 0.0065 mm, the hydraulic force is 94.25 N, and the spring stiffness is 11,575.84 N/m, the objective functions are optimized, the parameters are significantly improved, and a good effect is achieved on the experimental table of a 2D reciprocating compressor.

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Performance Comparison of Capacity Control Methods for Reciprocating Compressors

Cited by 8 publications

References 4 publications

A Literature Review of the Positive Displacement Compressor: Current Challenges and Future Opportunities

A Literature Review of the Positive Displacement Compressor: Current Challenges and Future Opportunities

A Novel Control Strategy on Stable Operation of Fuel Gas Supply System and Re-Liquefaction System for LNG Carriers

Optimization Design of Actuator Parameters with Stepless Capacity Control System Considering the Effect of Backflow Clearance

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