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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
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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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Theoretical and experimental analyses of the internal leakage in single-screw expanders
International Journal of Refrigeration, 2018Abstract A single-screw expander (SSE) is a type of volumetric expander that can be applied to power generation, which is beneficial for energy conservation and environment protection. Investigating the SSE leakage characteristics is necessary because leakage has a significant influence on the SSE performance.
Lili Shen +6 more
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Experimental study on the performance of single screw expanders by gap adjustment
Energy, 2013Abstract Improving thermodynamic efficiency of prime movers is the key issue for efficient utilization of low-temperature heat resources. Single screw expander may be a good candidate because of its many good characteristics. Precisions in manufacture and assembly are very important factors to the performance of single screw expanders. In this paper,
Wei Wang +4 more
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The Experimental Study on Performance of Single Screw Expander with Air as Working Fluid
Advanced Materials Research, 2013A new single screw expansion machine was developed in order to improve the practical level of low temperature thermal power generation technology and the utilization of waste heat and renewable energy. With compressed air as working fluid, the power, efficiency, gas consumption rate and temperature difference of single screw expander with rotational ...
Jing Fu Wang +3 more
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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 ...
Davide Ziviani +3 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
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ASME 2012 6th International Conference on Energy Sustainability, Parts A and B, 2012
Improving thermodynamic efficiency of prime movers is the key issue for efficient utilization of low temperature heat resources. Because of many good characteristics, the single screw expander is perhaps a good choice. Precisions in manufacture and assembly are very important factors to the performance of single screw expanders.
Wei Wang +5 more
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Improving thermodynamic efficiency of prime movers is the key issue for efficient utilization of low temperature heat resources. Because of many good characteristics, the single screw expander is perhaps a good choice. Precisions in manufacture and assembly are very important factors to the performance of single screw expanders.
Wei Wang +5 more
openaire +1 more source
Energy, 2021
Abstract At present, the most prominent technical problems of small and medium capacity expanders are low internal efficiency and small expansion ratio. In order to promote the practical application of small and medium capacity Organic Rankine Cycle (ORC) system, improving the thermodynamic performance of the expander was a remarkable issue, and the ...
Wei Wang +4 more
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Abstract At present, the most prominent technical problems of small and medium capacity expanders are low internal efficiency and small expansion ratio. In order to promote the practical application of small and medium capacity Organic Rankine Cycle (ORC) system, improving the thermodynamic performance of the expander was a remarkable issue, and the ...
Wei Wang +4 more
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Static Finite Element Analysis on Cast Shell of a 100 kW Single Screw Expander
Applied Mechanics and Materials, 2014In the process of shell design of a 100kW single screw expander, the fundamental research on the screw chamber walls thickness is still lacking. Thin wall may cause deformation and the damage possibility of the inlet passage. Thick wall will increase the weight of the expander and led to assembly problem and transportation inconvenience. In this paper,
Qi Liu +5 more
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