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Investigation of flow characteristics in a single screw expander: A numerical approach
Energy, 2020 Abstract 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 ...
Nicola Casari +2 more
exaly +4 more sources
Preliminary experimental study of single screw expander prototype
Applied Thermal Engineering, 2011 Abstract Efficient heat conversion of low temperature heat source is a key problem for energy saving, especially in the fields of waste heat recovery and renewable energy utilization. At present, technical bottleneck for low temperature thermal power is lack of suitable prime mover.
Chong-Fang Ma
exaly +3 more sources
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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, Guodong Xia, Caixia Zhu
exaly +2 more sources
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, Chuang Li
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, Chuang Li
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 ...
Chong-Fang Ma, Hang Guo
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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.
Yuanwei Lu, Yuting Wu, 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
exaly +2 more sources