The Experts below are selected from a list of 21 Experts worldwide ranked by ideXlab platform
Dongyue Wang - One of the best experts on this subject based on the ideXlab platform.
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Examination of the expander Leaving Loss in variable organic Rankine cycle operation
Energy Conversion and Management, 2013Co-Authors: Gang Pei, Dongyue WangAbstract:Abstract The organic Rankine cycle (ORC) favorably operates at low temperature. It differs significantly from the steam Rankine cycle in fluid enthalpy drop during expansion and reaction to change in condensation temperature. In current method for ORC-based energy conversion the expander Leaving Loss is generally neglected. Shortcomings of this method are outlined in this paper. Theoretical analysis of the expander Leaving Loss varying with the condensation temperature, evaporation temperature, and inlet pressure is first performed. Experimental test is subsequently carried out. The results indicate that unlike in the steam Rankine cycle, the Leaving Loss in the ORC on using R123 or R245fa increases by about 10 times as the condensation temperature changes from 30 to 0 °C, and is comparable with the enthalpy drop. With an inlet temperature of about 97 °C and a deviation of about 20 °C from the design condensation temperature, the ratio of the Leaving Loss to the enthalpy drop is about 10.4%. Besides, variation in the Leaving Loss may lead to expansion wave or shock wave inside the expander. The Leaving Loss becomes an important factor and should be included to determine the ORC year-round performance.
Gang Pei - One of the best experts on this subject based on the ideXlab platform.
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Examination of the expander Leaving Loss in variable organic Rankine cycle operation
Energy Conversion and Management, 2013Co-Authors: Gang Pei, Dongyue WangAbstract:Abstract The organic Rankine cycle (ORC) favorably operates at low temperature. It differs significantly from the steam Rankine cycle in fluid enthalpy drop during expansion and reaction to change in condensation temperature. In current method for ORC-based energy conversion the expander Leaving Loss is generally neglected. Shortcomings of this method are outlined in this paper. Theoretical analysis of the expander Leaving Loss varying with the condensation temperature, evaporation temperature, and inlet pressure is first performed. Experimental test is subsequently carried out. The results indicate that unlike in the steam Rankine cycle, the Leaving Loss in the ORC on using R123 or R245fa increases by about 10 times as the condensation temperature changes from 30 to 0 °C, and is comparable with the enthalpy drop. With an inlet temperature of about 97 °C and a deviation of about 20 °C from the design condensation temperature, the ratio of the Leaving Loss to the enthalpy drop is about 10.4%. Besides, variation in the Leaving Loss may lead to expansion wave or shock wave inside the expander. The Leaving Loss becomes an important factor and should be included to determine the ORC year-round performance.
T. Tanuma - One of the best experts on this subject based on the ideXlab platform.
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Development of last-stage long blades for steam turbines
Advances in Steam Turbines for Modern Power Plants, 2017Co-Authors: T. TanumaAbstract:The aim of this chapter is to present development and design technologies and methodologies of last-stage long blades for large-scale steam turbines for modern power plants. Technical features of last-stage long blades are high centrifugal force, high blade speed, three-dimensional flow, wet steam flow, and relatively large unsteady flow forces during low-load operations. These features are the result of the required large annulus areas that are required, which make last-stage long blade developments difficult. Furthermore, as the name suggests, last stages with exhaust diffusers need to be designed carefully to minimize the Leaving Loss because there is no stage that uses the exit steam. Therefore, new technologies for aerodynamic design, mechanical and aeromechanical design, and material design are required when we begin new longer-blade development. In this chapter we present modern technologies and methodologies with some case examples.
Ren Da-kang - One of the best experts on this subject based on the ideXlab platform.
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Discussion of Last Stage Blade Aerodynamic Design of Large Steam Turbine
Turbine Technology, 2006Co-Authors: Ren Da-kangAbstract:Some discussion about aerodynamic design of last stage blade of large steam turbine has been given basing on the result of S_2 design calculation.Comparison and appraise has been presented for uniform circulation control and controlled- vortex aerodynamics.Analysis shows that controlled-vortex aerodynamics can make reaction more uniform,but it is limited to some extent because of larger Leaving Loss when it is used to last stage of large steam turbine.
Maureen A Flint - One of the best experts on this subject based on the ideXlab platform.
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building a compass Leaving Loss and daughterhood in academia
2018Co-Authors: Maureen A FlintAbstract:How do you navigate the terrain of academia, a landscape that is particular and specific to each traveler, building compasses to chart the way? This chapter weaves together my journey into academia with memories of my mother, building compasses of daughter/womanhood along the way. I tell a narrative of becoming woman/daughter that follows a zigzagging voyage from New York to Alabama, a journey of Leavings and Loss intertwined with my mother’s diagnosis and death. Simultaneously, I consider the ethical and emotional entanglements of daughterhood in the present: the possibilities for tellings and (re)presentations that embrace complication and nuance, and the responsibility and accountability I have to my family as I tell this story and continue my journey in academia.