Development of a thermodynamic low order model for a twin screw expander with emphasis on pulsations in the inlet pipe

Papeš, Iva; Degroote, Joris; Vierendeels, Jan

doi:10.1016/j.applthermaleng.2016.04.159

Cited by 22 publications

(10 citation statements)

References 13 publications

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“…As shown in Figure 4, the lump model is to describe thermophysical properties of fluids in the control volume in terms of rotating angle by developing differential control equations based on mass and energy conservation. Usually, there are two options of the lump model: m-u model [55][56][57][58][59] and p-T model [17,29,[60][61][62][63]. The former is simpler in equation structures, while the latter consumes less time.…”

Section: Lump Modelmentioning

confidence: 99%

A Review of Recent Research and Application Progress in Screw Machines

Wang

Liu

et al. 2022

Machines

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Screw machines, mainly including single-screw type and twin-screw type, have gone through significant development and improvement during the past decade. This paper reviews the relevant studies available in the open literature for acquiring insight into and to establish the state of the art of the research and application status of screw machines. The related research on different aspects, which would affect the performance and reliability of screw machines includes rotor profile and geometric characteristics, thermodynamic modelling, vibration and noise, lubrication and wear, control of capacity and built-in volume ratio, and liquid injection technology. In the aspect of thermodynamic modelling, the available methods, i.e., empirical or semi-empirical model, lump model, and 3D CFD model, adopted for the performance prediction and optimal design of screw machines are summarized. Then, the review covers the application status of screw machines in the fields of air compression and expansion, refrigeration and heat pump, organic Rankine cycle (ORC), and other popular applications, with an emphasis on the reported performance and progress in technologies of screw machines. Finally, conclusions and perspectives for future research in the area of screw machines are presented. The review provides readers with a good understanding of the research focus and progress in the field of screw machines.

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Section: Lump Modelmentioning

confidence: 99%

A Review of Recent Research and Application Progress in Screw Machines

Wang

Liu

et al. 2022

Machines

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“…Papes et al [61] presented a multi-chamber mathematical model of a twin screw expander to predict its performance. In order to calculate the mass flow rates through leakage paths more accurately, flow coefficients used in the converging nozzle model were derived from 3D Computational Fluid Dynamic (CFD) calculation.…”

Section: Research On Simulation Analysis Of Screw Expandermentioning

confidence: 99%

Overview of the Development and Application of the Twin Screw Expander

et al. 2020

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With the development of society, the energy crisis has become increasingly prominent, which greatly affects the sustainable development of the economy of various countries. Industrial energy consumption accounts for more than 70% of China’s total energy consumption, of which more than 50% is converted to industrial waste heat, and recyclable waste heat resources account for about 60% of the total waste heat resources, while China’s current utilization rate of industrial waste heat only reaches about 30%. The development of renewable energy and recovery of low-grade waste heat in industry is the key to solve the problem. As a type of volumetric expander with full flow expansion, the screw expander is extensively applied in the industrial waste heat recovery and geothermal energy generation industry because of its effective utilization of low enthalpy energy. Improving the performance of the screw expander as the core, the paper concludes and summarizes the research status of the leakage, rotor geometry, sealing and lubrication, processing and manufacturing, which can affect the performance of the screw expander. In addition, it also introduces the application status and potential utilization of screw expander.

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“…Papes et al. 5 developed a mathematical model to predict the pressure pulsation in a screw expander inlet pipe. Xu et al., 6 Ghanbariannaeeni and Ghazanfarihashemi, 7 and Zhan and Duan 8 developed theoretical models to predict the pressure pulsations in the reciprocating compressors.…”

Section: Introductionmentioning

confidence: 99%

Vibration analysis and control of a screw compressor outlet piping system

Zhao

Feng

Zhao

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part E:

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The severe vibration of a screw compressor outlet piping system caused the premature failures of some thermowells and the unplanned shut down of the compressor system. The root causes of the vibration problem were investigated by numerical simulations. An acoustic model was established to predict the pressure pulsation of the gas inside the pipelines, and two finite element models were built to study the vibration characteristics of the overall piping system and of the thermowells. The numerical results indicated that the vibration problem may be attributed to the excessive pressure nonuniformity of the gas inside the pipelines, low overall stiffness of the piping system and the first-order structural resonance occurred on the thermowells. A pulsation attenuator was added and the pipelines were rearranged to reduce the pressure pulsation, some pipe supports were added to improve the overall stiffness of the piping system, and the thermowells were reinforced to avoid the first-order structural resonance. After the modifications, the field measurement data showed that the vibration of the piping system decreased significantly, and the modified piping system has been operating normally for nearly two years.

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Development of a thermodynamic low order model for a twin screw expander with emphasis on pulsations in the inlet pipe

Cited by 22 publications

References 13 publications

A Review of Recent Research and Application Progress in Screw Machines

A Review of Recent Research and Application Progress in Screw Machines

Overview of the Development and Application of the Twin Screw Expander

Vibration analysis and control of a screw compressor outlet piping system

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