scholarly journals Sperry low-temperature geothermal conversion system. Volume I. Organic-working-fluid properties. Final report. [R-114, 1,2-dichlorotetrafluorethane]

1981 ◽  
Author(s):  
C. Carroll ◽  
K.R. Hules ◽  
R. Langley ◽  
B. Toekes ◽  
D.P. Wilson
Keyword(s):  
Low Temperature ◽  
Working Fluid ◽  
Final Report ◽  
Conversion System ◽  
Fluid Properties ◽  
R 114 ◽  
System Volume

scholarly journals Development of geothermal binary-cycle working-fluid properties: information and analysis of cycles. Final report

1981 ◽  
Author(s):  
K.E. Starling ◽  
Z.I. Malik ◽  
C.T. Chu
Keyword(s):  
Working Fluid ◽  
Final Report ◽  
Binary Cycle ◽  
Fluid Properties

Efficiency Analysis on Low Temperature Energy Conversion System Based on Organic Rankine Cycle

2011 ◽  
Vol 347-353 ◽  
pp. 498-503
Author(s):  
Wei Wang ◽  
Yu Ting Wu ◽  
Chong Fang Ma ◽  
Jian Yu
Keyword(s):  
Low Temperature ◽  
Thermal Power ◽  
Power Conversion ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Working Fluid ◽  
Single Screw ◽  
Conversion System ◽  
Temperature Heat ◽  
The Impact

The amount of low temperature heat resources is very huge, efficient utilization that energy is very important issue for improving energy efficiency, saving energy and protecting environment. Due to the small available energy of low temperature heat source, how to improve thermodynamic efficiency is the key problem. In this paper, the thermodynamic model of low temperature thermal power conversion system based on organic Rankine cycle was described firstly. Turbine, single screw and piston expanders were briefly described. R123, R245fa and R134a were chose as working fluid because of quite different critical temperature. Based on this model, the influence of thermodynamic property of organic working fluid on the efficiency of low temperature thermal power conversion system was discussed. The calculating result showed that R123 is the best choice if no considering the impact of expander types and that R245fa is the best choice if considering the impact of expander. This conclusion indicated that it is very important to investigate the match relationship between working fluid and expander. Moreover, single screw expander was proved to be more suitable than turbine and piston expanders for low temperature heat power conversion system.

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