scholarly journals Thermodynamic analysis of R134a in an Organic Rankine Cycle for power generation from low temperature sources

DYNA ◽  
2014 ◽  
Vol 81 (185) ◽  
pp. 153 ◽  
Author(s):  
Fredy Vélez ◽  
Farid Chejne ◽  
Ana Quijano
Keyword(s):  
Power Generation ◽  
Low Temperature ◽  
Thermodynamic Analysis ◽  
Organic Rankine Cycle ◽  
Rankine Cycle

Analysis and Optimization of ORC for Low-Temperature Waste Heat Power Generation

2011 ◽  
Vol 383-390 ◽  
pp. 6614-6620
Author(s):  
Xin Ling Ma ◽  
Xiang Rui Meng ◽  
Xin Li Wei ◽  
Jia Chang ◽  
Hui Li
Keyword(s):  
Power Generation ◽  
Low Temperature ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Working Fluid ◽  
Inlet Temperature ◽  
Heat Power ◽  
Generation System ◽  
Power Generation System

This paper presents energy analysis, thermodynamic calculation and exergy analysis for waste heat power generation system of Organic Rankine Cycle based on the first and second laws of thermodynamics. In order to improve system performance, for low-temperature waste heat of 120°C and R245fa organic working fluid, using Aspen Plus software conducted simulation, optimization and improvement. Results from these analyses show that decreasing the expander inlet temperature, increasing inlet pressure of the expander, and adding regenerative heater can increase thermal and exergy efficiencies, at the same time reduce system irreversibility.

Analysis of Radial Turbine of ORC Power Generation System for Low Temperature Heat Sources

2015 ◽  
Author(s):  
Zemin Bo ◽  
Zhenkun Sang ◽  
Qianqian Zhang ◽  
Yiwu Weng
Keyword(s):  
Power Generation ◽  
Low Temperature ◽  
Organic Rankine Cycle ◽  
Leading Edge ◽  
Rankine Cycle ◽  
Heat Sources ◽  
Generation System ◽  
Radial Turbine ◽  
Temperature Heat ◽  
Power Generation System

The radial turbine is a key component of the Organic Rankine Cycle (ORC) power generation system. In order to improve the performance of ORC system for low temperature heat sources, a 150kW radial turbine using R600a has been designed and analyzed. First, the aerodynamic calculation of the radial turbine was conducted and one-dimensional aerodynamic parameters were obtained. Then three-dimensional CFD numerical analysis has been conducted to optimize the geometric design of the radial turbine. The results show the distribution of the flow field around the blades at different height and streamline distribution from leading edge to the trailing edge. At last, the effect of rotation speed on the performance of radial turbine was analyzed. The results can provide basic data for the design of radial turbine of ORC power generation system for low temperature heat sources.

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