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Review and Update on the Geometry Modeling of Single-Screw Machines With Emphasis on Expanders
International Journal of Refrigeration, 2018Abstract Single-screw type of machines has been widely used in the vapor compression industry for decades. More recently, such machines have been proposed as volumetric expanders in organic Rankine cycle (ORC) for low-grade waste heat recovery applications because of a number of advantages compared to other volumetric machines, e.g., twin-screw ...
Eckhard Groll +2 more
exaly +2 more sources
Experimental Study on the Performance of Single-Screw Expander With Different Inlet Vapor Dryness
Applied Thermal Engineering, 2015Abstract A single-screw expander with 155 mm diameter screw has been developed. In order to investigate the performance of this prototype with different inlet vapor dryness, an organic Rankine cycle experimental system was built, and experiments were conducted at different inlet vapor dryness by adjusting the mass flow rate of working fluid into ...
Hang Guo
exaly +2 more sources
Performance Study on Compressed Air Refrigeration System Based on Single Screw Expander
Energy, 2013Abstract A new kind of expanders, called as single screw expander, has been developed by our team and applied to refrigeration systems. The present paper is to determine experimentally the refrigeration performance of a compressed air refrigeration system which is based on a single screw expander with 175 mm diameter rotor.
Yuting Wu, Hang Guo, chongfang Ma
exaly +2 more sources
Influence of Intake Pressure on the Performance of Single Screw Expander Working With Compressed Air
Applied Thermal Engineering, 2013Abstract In order to meet the demand of small expander in the field of waste heat recovery, distributed renewable energy, gas liquefaction and compressed air vehicles, a single screw expander with 175 mm diameter rotor is developed in our lab. An experimental system using compressed air has been built to test the performance of single screw expanders.
Wei He, Yuting Wu, chongfang Ma
exaly +2 more sources
Investigation of flow characteristics in a single screw expander: A numerical approach
Energy, 2020Abstract In this paper, a three-dimensional computational fluid dynamics (CFD) simulation is carried out to investigate the performance of a single screw expander by linking its behavior with the dynamic features of the flow field. To study this aspect and other phenomena that can affect expander operation in an actual Organic Rankine Cycle (ORC ...
Casari N. +5 more
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Mathematical modeling of torque for single screw expanders
Journal of Mechanical Science and Technology, 2017This paper presents a mathematical model of torque for Single screw expanders (SSEs). Instantaneous torque and torque ratio were analyzed and discussed. The periodic variation of instantaneous torque is the same for different inlet pressure levels. The torque ratio, with its value close to 1, is independent of the inlet pressure of SSE. An experimental
Yuting Wu +7 more
openaire +1 more source
Analysis of circumferential gas force on star-wheel in a single screw expander
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2022Service life of a star-wheel directly affects operation stability of a single screw expander. In addition, since star-wheel tooth of a single screw expander is prone to wear, circumferential force of the star-wheel rotor is investigated in this paper.
Rui Huang +6 more
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Numerical investigation of flow behavior and film thickness in the single screw expander
International Journal of Mechanical Sciences, 2021Abstract The need to understand the flow behavior and film thickness in the single screw expander is very crucial since it is known to be a complex system due to the existence of various flow patterns. The present work reports a computational fluid dynamic analysis of two-phase flow behavior and film thickness through a vertical helical rectangular ...
Xianfei Liu +6 more
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Dynamic Mesh Technology for the Simulation Study of Single Screw Expander
2019Computational fluid dynamics (CFD) methods have been widely used in simulating internal flow of rotary positive displacement type compressors and expanders, especially for twin screw, scroll and rolling piston machines. But it is still lack of CFD research on single screw compressors and expanders due to the difficulty of spacial screw curved surface ...
Lili Shen +5 more
openaire +1 more source