Results 221 to 230 of about 5,224,034 (249)
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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
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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.
Ruiping Zhi, Yuting Wu, Lili Shen
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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
openaire +1 more source
Energy, 2016
Abstract Expander is a key components in Organic Rankine Cycle (ORC) system. In order to improve the performances of single screw expander in large expansion ratio conditions and give consideration to normal conditions, a new idea called ‘increasing the built-in volume ratio appropriately and converting single screw expander into double-stage machine
Biao Lei, Chong-Fang Ma
exaly +2 more sources
Abstract Expander is a key components in Organic Rankine Cycle (ORC) system. In order to improve the performances of single screw expander in large expansion ratio conditions and give consideration to normal conditions, a new idea called ‘increasing the built-in volume ratio appropriately and converting single screw expander into double-stage machine
Biao Lei, Chong-Fang Ma
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
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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
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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
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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
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